subject:(ecosystem models)

Universitat de Valencia

1. Pennino, Maria Grazia. Implementing ecosystem approach to fishery management: advances and new tools .

Degree: 2013, Universitat de Valencia

► Desde la antigüedad, la pesca ha sido una fuente importante de alimentos para la humanidad, así como fuente de empleo y beneficios económicos para quienes… (more)

▼ Desde la antigüedad, la pesca ha sido una fuente importante de alimentos para la humanidad, así como fuente de empleo y beneficios económicos para quienes se dedican a esta actividad. Sin embargo, con el aumento de los conocimientos científicos y la evolución dinámica de la pesca se hizo evidente de que los recursos acuáticos, aunque renovables, no eran infinitos y era necesario gestionar adecuadamente su contribución al bienestar nutricional, económico y el bienestar social de la población mundial para un crecimiento y desarrollo sostenible. En los últimos años, la pesca mundial se ha convertido en un sector dinámico y de desarrollo de la industria alimentaria. Los estados costeros han procurado aprovechar sus nuevas oportunidades invirtiendo en flotas pesqueras modernas y fábricas de procesamiento en respuesta a la creciente demanda internacional de pescado y productos pesqueros. Sin embargo, se ha constatado que la explotación pesquera no puede mantener un aumento incontrolado sin provocar un perjuicio a la salud de los recursos pesqueros. En diversos foros se expresa gran preocupación acerca de la contribución de la pesca al desarrollo sostenible, la sobrepesca, el exceso de capacidad de las flotas, el agotamiento de algunas poblaciones, los cambios inducidos por el hombre en los ecosistemas, así como el aumento y la globalización del comercio pesquero con su potencial impacto en el abastecimiento local. Para hacer frente a estos problemas, las Organización de las Naciones Unidas para la Agricultura y la Alimentación (FAO) ha pedido la aplicación de un enfoque ecosistémico a la gestión de la pesca (EAFM), cuyo objetivo es lograr una explotación sostenible de la pesca comercial, que tenga en cuenta las interacciones entre las artes de pesca y los ecosistemas marinos. Un EAFM tiene en cuenta que la pesca es una componente del ecosistema y no se puede gestionar de forma aislada. Un EAFM debe considerar la aplicación de los principios del desarrollo sostenible en el sector pesquero, la combinación de la sostenibilidad ecológica, la viabilidad económica y la equidad social. No obstante, aunque se reconoce que la pesca es importante para el desarrollo sostenible y que su contribución puede ser mejorada, la cantidad de información científica objetiva sobre la pesca es limitada y a menudo la información que existe es de difícil acceso. La fiabilidad del asesoramiento científico para la gestión de los recursos naturales depende en gran medida de la cantidad y calidad de los datos disponibles para la evaluación científica y su interpretación. Es cierto que hay una enorme cantidad de datos sobre los ecosistemas marinos y que además son fácilmente accesibles a través de plataformas online (como por ejemplo los datos de teleobservación obtenidos por satélite y observaciones basadas en telemetría automática). Sin embargo, la gran mayoría de los casos tenemos que lidiar con datos limitados e irregularmente espaciados (por ejemplo, de peces y otra fauna marina). Además, los datos no siempre son directamente… Advisors/Committee Members: Bellido Millán, José María (advisor).

Subjects/Keywords: species distribution models; ecosystem approach to fishery management; bayesian spatial models

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pennino, M. G. (2013). Implementing ecosystem approach to fishery management: advances and new tools . (Doctoral Dissertation). Universitat de Valencia. Retrieved from http://hdl.handle.net/10550/30118

Chicago Manual of Style (16^th Edition):

Pennino, Maria Grazia. “Implementing ecosystem approach to fishery management: advances and new tools .” 2013. Doctoral Dissertation, Universitat de Valencia. Accessed December 15, 2019. http://hdl.handle.net/10550/30118.

MLA Handbook (7^th Edition):

Pennino, Maria Grazia. “Implementing ecosystem approach to fishery management: advances and new tools .” 2013. Web. 15 Dec 2019.

Vancouver:

Pennino MG. Implementing ecosystem approach to fishery management: advances and new tools . [Internet] [Doctoral dissertation]. Universitat de Valencia; 2013. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/10550/30118.

Council of Science Editors:

Pennino MG. Implementing ecosystem approach to fishery management: advances and new tools . [Doctoral Dissertation]. Universitat de Valencia; 2013. Available from: http://hdl.handle.net/10550/30118

Texas A&M University

2. Tapaneeyakul, Sasathorn. Spatial Valuation of Ecosystem Services in Agricultural Lands.

Degree: 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/156304

► Agricultural lands provide various provisioning ecosystem services to humans, including food, water, fibers, fuel, and components of pharmaceuticals. These ecosystems also support and regulate such… (more)

▼ Agricultural lands provide various provisioning ecosystem services to humans, including food, water, fibers, fuel, and components of pharmaceuticals. These ecosystems also support and regulate such services as pollination, water provision, and the retention of nutrients and soil. The value of these ecosystem services, while tremendous, historically has been vaguely defined and underappreciated. This research built a comprehensive framework to spatially map and quantify the ecosystem services provided by agricultural lands in Galveston County, Texas using an open-source ecosystem services modeling tool called the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) models. Five ecosystem services models were investigated, including: water yield, nutrient retention, sediment retention, pollination abundance, and habitat quality. Biophysical data, such as land use/land cover, precipitation, evapotranspiration, soil and pollinator characteristics, and threats to habitat were input into the InVEST models to determine the amounts and spatial patterns of these ecosystem services. Results showed spatially distributed ecosystem services throughout the study area, with hot spots of ecosystem services where certain activities were concentrated, such as streams, croplands, and intensely developed lands. A hedonic price model was designed to appraise the value of these ecosystem services based on the prices of the agricultural land as well as other relevant factors (neighborhood, structure, and market segmentation). The model was used to estimate the marginal implicit price of a per unit increase in each ecosystem services variable. The estimates suggested that ecosystem services were included in appraisals of the land prices ? to various degrees of statistically significant correlation ? except with regards to pollination abundance and habitat quality. The habitat degradation value, a derivative of the habitat quality model, was shown to be most closely correlated with land prices, which could be explained by highly degraded lands as a result of extensive cropping systems. Together, this suggests that more planning, thoughtful policy making, and resource management could help avoid land degradation and prolonged effects that could potentially deplete more resources and habitats within (and beyond) these areas. Further model calibrations that include comparisons of different scenarios (e.g. a baseline scenario, constrained development, and non-constrained development) to manage these lands would help determine efficient steps forward, as accounting for the economic value of ecosystem services is now vital for managing and sustaining our irreplaceable natural resources. Advisors/Committee Members: Feagin, Russell (advisor), Loh, Douglas K. (advisor), Whisenant, Steven (committee member), Shaw, W. Douglass (committee member).

Subjects/Keywords: Ecosystem Services; Invest Models; Agricultural Lands; Valuation; Hedonic; GIS

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tapaneeyakul, S. (2015). Spatial Valuation of Ecosystem Services in Agricultural Lands. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156304

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tapaneeyakul, Sasathorn. “Spatial Valuation of Ecosystem Services in Agricultural Lands.” 2015. Thesis, Texas A&M University. Accessed December 15, 2019. http://hdl.handle.net/1969.1/156304.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tapaneeyakul, Sasathorn. “Spatial Valuation of Ecosystem Services in Agricultural Lands.” 2015. Web. 15 Dec 2019.

Vancouver:

Tapaneeyakul S. Spatial Valuation of Ecosystem Services in Agricultural Lands. [Internet] [Thesis]. Texas A&M University; 2015. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/1969.1/156304.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tapaneeyakul S. Spatial Valuation of Ecosystem Services in Agricultural Lands. [Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/156304

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Edinburgh

3. Meacham, Theresa Marie. Improving the understanding of temperate forest carbon dynamics.

Degree: PhD, 2013, University of Edinburgh

URL: http://hdl.handle.net/1842/17854

► The soil organic carbon (C) pool is estimated to contain at least three times as much organic C as is stored in vegetation. However, the… (more)

▼ The soil organic carbon (C) pool is estimated to contain at least three times as much organic C as is stored in vegetation. However, the processes controlling below-ground C dynamics are poorly understood, representing a key uncertainty in ecosystem models. Soil respiration rate (Rs) is a large component of the forest carbon cycle, however the factors that control it are still poorly understood, and those affecting autotrophic (Ra) and heterotrophic (Rh) respiration rates differ and vary in space and time. A variety of direct (i.e. soil and ingrowth cores) and indirect (i.e. rhizotron and minirhizotron) methods exist for obtaining estimates of fine root (< 2 mm diameter) production, with the consequence that there is a high variability in root biomass estimates between root studies. In this thesis I aim to contribute towards a better understanding of processes governing below-ground C dynamics. In particular I focus on: 1) the spatial and seasonal variability of Rs and drivers; 2) the uncertainty on fine root C pool measurement methods; 3) comparing novel datasets of Rs, fine root biomass and girth increment, with outputs from the SPA v2 model. To determine the dominant controls and spatial heterogeneity of Rs, I measured Rs and key biotic and abiotic drivers seasonally, in a Quercus robur forest in southern England. Measurements were made quarterly in three plots, each with measurement points arranged according to a spatial sampling design, enabling any spatial autocorrelation to be detected. Rs drivers were categorised into plant (i.e. leaf area index, weighted tree proximity (i.e. mean dbh within 4 m of a point), and fine root biomass), physical (i.e. soil moisture, soil temperature and soil bulk density) and substrate (i.e. litter depth and organic layer depth) factors. I explore: 1) what the dominant controls of Rs are and whether they change during the growing season; 2) whether micro-topography and stand structure are correlated with drivers, and influence the spatial variability of Rs, thereby simplifying up-scaling processes; 3) if physical drivers of Rs are spatially more homogeneous than plant drivers and the availability of substrate. I found no clear seasonal difference in drivers, with Rs consistently responding to litter depth, bulk density and soil moisture. The only significant response of Rs to micro-topography and tree factor was in August and September respectively and physical factors were found to be the most spatially homogeneous. Rs measurements were non-normally distributed, with ‘hotspots’ of particularly high fluxes found that remained stable throughout the measurement campaign. These findings suggest that the seasonal and spatial variability and distribution of Rs and its main drivers should be considered at the sampling design stage, to avoid bias for up-scaling non-linear processes. To address the uncertainties associated with determining fine root biomass change, we compared the measurement error for five methodologies (four indirect and one direct) in a Pinus contorta and Quercus robur…

Subjects/Keywords: 631.4; temperate forests; carbon; roots; soil; ecosystem models

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Meacham, T. M. (2013). Improving the understanding of temperate forest carbon dynamics. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/17854

Chicago Manual of Style (16^th Edition):

Meacham, Theresa Marie. “Improving the understanding of temperate forest carbon dynamics.” 2013. Doctoral Dissertation, University of Edinburgh. Accessed December 15, 2019. http://hdl.handle.net/1842/17854.

MLA Handbook (7^th Edition):

Meacham, Theresa Marie. “Improving the understanding of temperate forest carbon dynamics.” 2013. Web. 15 Dec 2019.

Vancouver:

Meacham TM. Improving the understanding of temperate forest carbon dynamics. [Internet] [Doctoral dissertation]. University of Edinburgh; 2013. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/1842/17854.

Council of Science Editors:

Meacham TM. Improving the understanding of temperate forest carbon dynamics. [Doctoral Dissertation]. University of Edinburgh; 2013. Available from: http://hdl.handle.net/1842/17854

Utah State University

4. Zhang, Gong. Integrating Remote Sensing and Ecosystem Models for Terrestrial Vegetation Analysis: Phenology, Biomass, and Stand Age.

Degree: PhD, Watershed Sciences, 2012, Utah State University

URL: https://digitalcommons.usu.edu/etd/1316

► Terrestrial vegetation plays an important role in global carbon cycling and climate change by assimilating carbon into biomass during the growing season and releasing… (more)

▼ Terrestrial vegetation plays an important role in global carbon cycling and climate change by assimilating carbon into biomass during the growing season and releasing it due to natural or anthropogenic disturbances. Remote sensing and ecosystem models can help us extend our studies of vegetation phenology, aboveground biomass, and disturbances from field sites to regional or global scales. Nonetheless, remote sensing-derived variables may differ in fundamental and important ways from ground measurements. With the growth of remote sensing as a key tool in geoscience research, comparisons to ground data and intercomparisons among satellite products are needed. Here I conduct three separate but related analyses and show promising comparisons of key ecosystem states and processes derived from remote sensing and theoretical modeling to those observed on the ground. First, I show that the Moderate Resolution Imaging Spectroradiometer (MODIS) greenup product is significantly correlated with the earliest ground phenology event for North America. Spring greenup indices from different satellites demonstrate similar variability along latitudes, but the number of ground phenology observations in summer, fall, and winter is too limited to interpret the remote sensing-derived phenology products. Second, I estimate aboveground biomass (AGB) for California and show that it agrees with inventory-based regional biomass assessments. In this approach, I present a new remote sensing-based approach for mapping live forest AGB based on a simple parametric model that combines high-resolution estimates of Leaf Area Index derived from Landsat and canopy maximum height from the space-borne Geoscience Laser Altimeter System (GLAS) sensor. Third, I built a theoretical model to estimate stand age in primary forests by coupling a carbon accumulation function to the probability density of disturbance occurrences, and then ran the model with satellite-derived AGB and net primary production. The validated remote sensing data, integrated with ecosystem models, are particularly useful for large-region vegetation research in areas with sparse field measurements, and will help us to explore the long-term vegetation dynamics. Advisors/Committee Members: Michael A. White, ;.

Subjects/Keywords: remote sensing; ecosystem; models; vegetation; phenology; biomass; Environmental Sciences

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, G. (2012). Integrating Remote Sensing and Ecosystem Models for Terrestrial Vegetation Analysis: Phenology, Biomass, and Stand Age. (Doctoral Dissertation). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/1316

Chicago Manual of Style (16^th Edition):

Zhang, Gong. “Integrating Remote Sensing and Ecosystem Models for Terrestrial Vegetation Analysis: Phenology, Biomass, and Stand Age.” 2012. Doctoral Dissertation, Utah State University. Accessed December 15, 2019. https://digitalcommons.usu.edu/etd/1316.

MLA Handbook (7^th Edition):

Zhang, Gong. “Integrating Remote Sensing and Ecosystem Models for Terrestrial Vegetation Analysis: Phenology, Biomass, and Stand Age.” 2012. Web. 15 Dec 2019.

Vancouver:

Zhang G. Integrating Remote Sensing and Ecosystem Models for Terrestrial Vegetation Analysis: Phenology, Biomass, and Stand Age. [Internet] [Doctoral dissertation]. Utah State University; 2012. [cited 2019 Dec 15]. Available from: https://digitalcommons.usu.edu/etd/1316.

Council of Science Editors:

Zhang G. Integrating Remote Sensing and Ecosystem Models for Terrestrial Vegetation Analysis: Phenology, Biomass, and Stand Age. [Doctoral Dissertation]. Utah State University; 2012. Available from: https://digitalcommons.usu.edu/etd/1316

Delft University of Technology

5. Serras Marques, D. Analyzing and improving the overall user experience for a TV-ecosystem:.

Degree: 2012, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:f46cf8e5-e611-45bb-95fe-9eef30fc5d01

► The level of complexity in consumer electronic products is one of the main concerns for Innovation and Development (I&D) departments in companies manufacturing and selling… (more)

▼ The level of complexity in consumer electronic products is one of the main concerns for Innovation and Development (I&D) departments in companies manufacturing and selling household appliances. Nowadays, consumer electronic products tend to have more and more functions resulting in complexity increase that makes it harder for users to understand these products (Kuijk, 2009). On top of that, the previous user and expert evaluation test from Philips (PRC 1113) noticed an increased number of usability problems with regard the operability of the connected devices to the television. The Philips OneUX (“One User Experience”) is the project program initiated by Philips to offer users a unified way of working their TV sets with their connected devices. Philips features software with the name of EasyLink that shares the functionality between TV sets and connected devices through a cable. This software is present on every Philips device older than 2009. The OneUX intention is the ideal focus towards offering users a shared way of working without usability problems, and thus, the formation of a TV-ecosystem. Besides that, the User-Centered Design (UCD) approach aims to design with and from the user point of view and focuses on innovative solutions that improve the usage of a product, system or service. The reason to adopt a user-centered design approach in usability analysis of consumer electronics products is to come up with a better quality of the interaction between the user and the product-system (Wever et. al 2008). Thus, this thesis follows a UCD methodology based on qualitative research performed in three main stages, namely analysis, ideation and evaluation. A cognitive walkthrough process has been used to assess the usability problems of the considered user-centered functionality resulting in the identification of its origins. Hence, this process has focused on identifying how users use their TV-ecosystem; get their expectations, needs and perceived qualities when interacting with their TV sets so that a thorough design concept proposal could be developed from these inputs. Consequently, the problem definition stated that the origins of the usability problems were due to a poor integration of the system functions causing user unawareness of the functionality. The concept proposal is the solution that resulted from the application of design criteria obtained in this project. The design criteria established three main focuses of functional integration to address the origins of the usability problems. Thus, access, execution and compatibility of system functions should be better integrated with the qualities of the interaction perceived by users to deal with the user unawareness. Consequently, the concept proposal has originated two parts: first, the system function and second, the system functionality discovery, which offers users a faster execution with just one single press through understandable access with familiar keys. The integration for discovery focused on improving the provided onscreen messages to allow… Advisors/Committee Members: Van Kuijk, J., Boess, S..

Subjects/Keywords: Mental Models; TV-ecosystem; Conceptual Models; User expectation; Seamless Systems; User Experience

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Serras Marques, D. (2012). Analyzing and improving the overall user experience for a TV-ecosystem:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:f46cf8e5-e611-45bb-95fe-9eef30fc5d01

Chicago Manual of Style (16^th Edition):

Serras Marques, D. “Analyzing and improving the overall user experience for a TV-ecosystem:.” 2012. Masters Thesis, Delft University of Technology. Accessed December 15, 2019. http://resolver.tudelft.nl/uuid:f46cf8e5-e611-45bb-95fe-9eef30fc5d01.

MLA Handbook (7^th Edition):

Serras Marques, D. “Analyzing and improving the overall user experience for a TV-ecosystem:.” 2012. Web. 15 Dec 2019.

Vancouver:

Serras Marques D. Analyzing and improving the overall user experience for a TV-ecosystem:. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2019 Dec 15]. Available from: http://resolver.tudelft.nl/uuid:f46cf8e5-e611-45bb-95fe-9eef30fc5d01.

Council of Science Editors:

Serras Marques D. Analyzing and improving the overall user experience for a TV-ecosystem:. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:f46cf8e5-e611-45bb-95fe-9eef30fc5d01

Swedish University of Agricultural Sciences

6. Varenius, Kerstin. Interactions between fungi, forest management, and ecosystem services.

Degree: 2017, Swedish University of Agricultural Sciences

URL: https://pub.epsilon.slu.se/14629/

► Fungi provide a wide range of ecosystem services (ES) in forests but have for long been difficult to study. Knowledge of their role in soil… (more)

Subjects/Keywords: soil fungi; ecosystem services; forest management; genomes; nucleotide sequences; seed trees; simulation models; ectomyrrhizae; soil fungi; forest management; ecosystem services

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Varenius, K. (2017). Interactions between fungi, forest management, and ecosystem services. (Doctoral Dissertation). Swedish University of Agricultural Sciences. Retrieved from https://pub.epsilon.slu.se/14629/

Chicago Manual of Style (16^th Edition):

Varenius, Kerstin. “Interactions between fungi, forest management, and ecosystem services.” 2017. Doctoral Dissertation, Swedish University of Agricultural Sciences. Accessed December 15, 2019. https://pub.epsilon.slu.se/14629/.

MLA Handbook (7^th Edition):

Varenius, Kerstin. “Interactions between fungi, forest management, and ecosystem services.” 2017. Web. 15 Dec 2019.

Vancouver:

Varenius K. Interactions between fungi, forest management, and ecosystem services. [Internet] [Doctoral dissertation]. Swedish University of Agricultural Sciences; 2017. [cited 2019 Dec 15]. Available from: https://pub.epsilon.slu.se/14629/.

Council of Science Editors:

Varenius K. Interactions between fungi, forest management, and ecosystem services. [Doctoral Dissertation]. Swedish University of Agricultural Sciences; 2017. Available from: https://pub.epsilon.slu.se/14629/

University of Florida

7. Chagaris, David D, Jr. Ecosystem-Based Evaluation of Fishery Policies and Tradeoffs on the West Florida Shelf.

Degree: PhD, Fisheries and Aquatic Sciences - Forest Resources and Conservation, 2013, University of Florida

URL: http://ufdc.ufl.edu/UFE0046298

► Ecosystem-based fishery management inherently involves confronting tradeoffs and requires taking a more holistic approach to evaluating and developing fisheries management strategies. The goal of this… (more)

▼ Ecosystem-based fishery management inherently involves confronting tradeoffs and requires taking a more holistic approach to evaluating and developing fisheries management strategies. The goal of this study was to identify the ecological tradeoffs that arise through predator-prey interactions, the tradeoffs between conflicting management objectives, and the tradeoffs associated with marine protected areas. To accomplish this, I developed trophic-dynamic ecosystem model of the reef fish component (groupers and snappers) on the West Florida Shelf using Ecopath with Ecosim and Ecospace. The dynamic Ecosim model was used to project forward a suite of management prescriptions and predict the ecosystem impacts that occur due to predation and competition. Overall, I found that there were winners and losers in all policy options and that Vermilion Snapper (Rhomboplites aurorubens) and Black Seabass (Centropristis striata) were predicted to be at a competitive disadvantage to other groupers and snappers. Mostly modest impacts were predicted for policies oriented towards a singles species, such as rebuilding plans, and more widespread impacts predicted for those options that affect a suite of species or those in the middle of the food web. The tradeoff relationship between reef fish biomass and fishery profits was revealed through a policy optimization search. My results suggested that the WFS is suboptimal in terms of both biomass and profits and that a set of balanced policy options exist where both values are high with profits and reef fish biomass increasing by about 20% and 50% respectively. Lastly, marine protected areas were evaluated using a spatially explicit model, Ecospace. The model predicted little benefit from the small existing closures on the WFS and suggested that MPAs between 15-30% of the area can increase population sizes without causing economic collapse of the fishery. MPAs that were larger in size and with less edge were more beneficial than many smaller MPAs. This model quantifies the ecosystem impacts of management actions and should supplement, but not replace, single species assessment and management. ( en ) Advisors/Committee Members: ALLEN,MICHEAL S (committee chair), WALTERS,CARL JOHN (committee member), LARKIN,SHERRY L (committee member), MAHMOUDI,BEHZAD (committee member).

Subjects/Keywords: Biomass; Ecosystem models; Ecosystems; Fish; Fisheries; Fishing; Grouper; Modeling; Snapper; Tradeoffs; ecosystem – fisheries – interactions – management – marine – tradeoffs – trophic

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chagaris, David D, J. (2013). Ecosystem-Based Evaluation of Fishery Policies and Tradeoffs on the West Florida Shelf. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0046298

Chicago Manual of Style (16^th Edition):

Chagaris, David D, Jr. “Ecosystem-Based Evaluation of Fishery Policies and Tradeoffs on the West Florida Shelf.” 2013. Doctoral Dissertation, University of Florida. Accessed December 15, 2019. http://ufdc.ufl.edu/UFE0046298.

MLA Handbook (7^th Edition):

Chagaris, David D, Jr. “Ecosystem-Based Evaluation of Fishery Policies and Tradeoffs on the West Florida Shelf.” 2013. Web. 15 Dec 2019.

Vancouver:

Chagaris, David D J. Ecosystem-Based Evaluation of Fishery Policies and Tradeoffs on the West Florida Shelf. [Internet] [Doctoral dissertation]. University of Florida; 2013. [cited 2019 Dec 15]. Available from: http://ufdc.ufl.edu/UFE0046298.

Council of Science Editors:

Chagaris, David D J. Ecosystem-Based Evaluation of Fishery Policies and Tradeoffs on the West Florida Shelf. [Doctoral Dissertation]. University of Florida; 2013. Available from: http://ufdc.ufl.edu/UFE0046298

8. Gao, Yixuan. THE BIOECONOMICS OF SHADE-GROWN COFFEE PRODUCTION UNDER CLIMATE AND PRICE RISKS IN PUERTO RICO.

Degree: MS, 2018, University of New Hampshire

URL: https://scholars.unh.edu/thesis/1218

► Coffee production is severely affected by global climate change. One of the important impacts comes from the increasing infestation and distribution of coffee berry… (more)

▼ Coffee production is severely affected by global climate change. One of the important impacts comes from the increasing infestation and distribution of coffee berry borer (CBB), the most damaging coffee pest worldwide. Shade-grown coffee (SGC) systems can alleviate the impacts and increase the resilience of coffee farms by providing non-market and market ecosystem services. From an ecological perspective, SGC systems can provide many non-market ecosystem services such as pest risk mitigation, soil water retention, soil fertility, and pollination, which are all critical factors affecting coffee yields. From a financial perspective, SGC systems can benefit farmers by increasing the prices through shade-grown certification price premiums or quality price premiums, reducing price risks faced by farmers by providing alternative sources of income such as shade, and reducing the production risks by allowing more steady year-to-year coffee production. However, SGC systems can be more labor-intensive and often produce lower yields either due to lower per-shrub yields or due to lower coffee shrub density, or both, which can decrease farmers’ profits. Although farmers might agree that environmental conservation is an important goal of SGC systems, planting decisions are likely to be driven by farm production costs and revenues. The existence of trade-offs between ecosystem service provision and coffee production calls for an integrated bioeconomic analysis of SGC systems before recommendations can be made to farmers, with the net value of ecosystem service provision and the risk effects taken into consideration. In this thesis, we construct an integrated bioeconomic model, including a cellular automata model, a coffee yield model, and an economic model, to incorporate the ecosystem services and risk preferences into a farmer’s decision-making and find the optimal amount of shade on a coffee farm for risk-neutral and risk-averse farmers. Results show that, for risk-neutral farmers, the shade-grown systems generate higher net present values (NPVs) than sun-grown systems within shading levels of 12% - 37%. The optimal shading level is 24% and the optimal NPV is about $24,593 /0.5ha over 25 years. For moderately risk-averse farmers, shade-grown systems generate higher utility than a sun-grown system at any shading level, and the optimal shading level is 30%. Higher risk aversion leads to higher shading level selection. In the United States, the CBB is a new threat to the domestic production in Puerto Rico and Hawaii. Results of this thesis can inform policy discussions on the economic argument for shade-grown coffee systems that, under optimal shade levels, can maximize farm profits while to protecting farmers from temperature and price risks. Advisors/Committee Members: Shadi S. Atallah, Heidi Asbjornsen, Marek Petrik.

Subjects/Keywords: Bioeconomic models; Coffee agroforestry systems; Coffee berry borer; Ecosystem-based adaptation; Ecosystem services; Puerto Rico; Ecology; Agriculture economics; Environmental economics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gao, Y. (2018). THE BIOECONOMICS OF SHADE-GROWN COFFEE PRODUCTION UNDER CLIMATE AND PRICE RISKS IN PUERTO RICO. (Thesis). University of New Hampshire. Retrieved from https://scholars.unh.edu/thesis/1218

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gao, Yixuan. “THE BIOECONOMICS OF SHADE-GROWN COFFEE PRODUCTION UNDER CLIMATE AND PRICE RISKS IN PUERTO RICO.” 2018. Thesis, University of New Hampshire. Accessed December 15, 2019. https://scholars.unh.edu/thesis/1218.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gao, Yixuan. “THE BIOECONOMICS OF SHADE-GROWN COFFEE PRODUCTION UNDER CLIMATE AND PRICE RISKS IN PUERTO RICO.” 2018. Web. 15 Dec 2019.

Vancouver:

Gao Y. THE BIOECONOMICS OF SHADE-GROWN COFFEE PRODUCTION UNDER CLIMATE AND PRICE RISKS IN PUERTO RICO. [Internet] [Thesis]. University of New Hampshire; 2018. [cited 2019 Dec 15]. Available from: https://scholars.unh.edu/thesis/1218.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gao Y. THE BIOECONOMICS OF SHADE-GROWN COFFEE PRODUCTION UNDER CLIMATE AND PRICE RISKS IN PUERTO RICO. [Thesis]. University of New Hampshire; 2018. Available from: https://scholars.unh.edu/thesis/1218

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Florida

9. Chaikaew, Pasicha. Assessment of Climate Regulation, Carbon Sequestration, and Nutrient Cycling Ecosystem Services Impacted by Multiple Stressors.

Degree: PhD, Soil and Water Science, 2014, University of Florida

URL: http://ufdc.ufl.edu/UFE0046988

► The importance of maintaining and enhancing ecosystem services is a vital basis for delivering benefits to human well-being. There are still several research gaps in… (more)

▼ The importance of maintaining and enhancing ecosystem services is a vital basis for delivering benefits to human well-being. There are still several research gaps in linking biophysical and socio-economic characteristics, quantifying natural assets, and valuing services. The objective of this dissertation was to assess climate regulation, carbon sequestration, and nutrient cycling ecosystem services from the biophysical, ecological, and socio-economic perspectives. Findings suggest that top soils have acted as a carbon sink over the past decades in the Suwannee River Basin, Florida. The results coincided with an increase in total organic carbon (TOC) loads in surface waters of the Suwannee River, that were less pronounced than increases in total nitrogen (TN) and total phosphorus (TP) loads of which only a few of the drainage areas showed impairment by TN and TP. The net mineralization of TN and TP in soils and surface waters pinpointed to potential risks for nutrient enrichment in aquatic and terrestrial ecosystems. Biotic, soil, parent material, topographic, and water-related factors played crucial roles in predicting soil organic carbon (SOC) storage, whereas climatic factors were of much less importance. The model derived from simulated annealing and random forest estimating actual and attainable terrestrial carbon suggested the limitation of carbon enhancement in some areas (e.g., wetlands), while others showed potential to sequester more carbon (e.g., under row/field crops). The beliefs and perspectives of local residents identified nutrient cycling as the most important service, and climate regulation and carbon sequestration as the least important services, which somewhat contradicted the scientific-based knowledge from the empirical assessments. The willingness of the residents to pay for ecosystem services was extremely low (<$2/household/year). The socio-ecological outcomes from this study and secondary data from the literature and expert knowledge were then integrated in the Bayesian Belief Network (BBN) model under four distinct scenarios. Besides the natural processes and services, awareness, and adaptation through management were identified as key factors in manipulating these benefits. This dissertation took a big step forward in developing an ecosystem service concept from theory to a novel implementation that engaged pedogenic, hydrologic, biotic, atmospheric, and anthropogenic domains together. ( en ) Advisors/Committee Members: GRUNWALD,SABINE (committee chair), MARTIN,TIMOTHY A (committee member), DAROUB,SAMIRA H (committee member), HODGES,ALAN WADE (committee member).

Subjects/Keywords: Carbon; Climate change; Ecosystem models; Ecosystems; Jury sequestration; Nutrients; River basins; Soil organic carbon; Soils; Water quality; ecosystem

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chaikaew, P. (2014). Assessment of Climate Regulation, Carbon Sequestration, and Nutrient Cycling Ecosystem Services Impacted by Multiple Stressors. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0046988

Chicago Manual of Style (16^th Edition):

Chaikaew, Pasicha. “Assessment of Climate Regulation, Carbon Sequestration, and Nutrient Cycling Ecosystem Services Impacted by Multiple Stressors.” 2014. Doctoral Dissertation, University of Florida. Accessed December 15, 2019. http://ufdc.ufl.edu/UFE0046988.

MLA Handbook (7^th Edition):

Chaikaew, Pasicha. “Assessment of Climate Regulation, Carbon Sequestration, and Nutrient Cycling Ecosystem Services Impacted by Multiple Stressors.” 2014. Web. 15 Dec 2019.

Vancouver:

Chaikaew P. Assessment of Climate Regulation, Carbon Sequestration, and Nutrient Cycling Ecosystem Services Impacted by Multiple Stressors. [Internet] [Doctoral dissertation]. University of Florida; 2014. [cited 2019 Dec 15]. Available from: http://ufdc.ufl.edu/UFE0046988.

Council of Science Editors:

Chaikaew P. Assessment of Climate Regulation, Carbon Sequestration, and Nutrient Cycling Ecosystem Services Impacted by Multiple Stressors. [Doctoral Dissertation]. University of Florida; 2014. Available from: http://ufdc.ufl.edu/UFE0046988

University of Florida

10. Burks-Copes, Kelly A. Finding Integrated Solutions to Wicked Environmental Challenges Ecosystem-Based Management of Cottonwood Communities on the Missouri River.

Degree: PhD, Interdisciplinary Ecology, 2014, University of Florida

URL: http://ufdc.ufl.edu/UFE0046133

► A century’s worth of “command and control” river management decisions made by the U. S. Army Corps of Engineers (USACE) to reduce flooding, provide hydropower,… (more)

▼ A century’s worth of “command and control” river management decisions made by the U. S. Army Corps of Engineers (USACE) to reduce flooding, provide hydropower, increase navigation and stimulate economic development along our nation’s waterways has resulted in numerous unintended system-wide environmental consequences ranging from the degradation of water quality to the reduction of sediment transport and the loss of biodiversity. The latter has triggered Endangered Species Act (ESA) regulations forcing the USACE to take “reasonable and prudent” actions to recover threatened and endangered species imperiled by these flood control projects. With an ever-growing sense of environmental awareness and appreciation, communities on these rivers have challenged the USACE to pursue holistic and sustainable solutions that adaptively restore ecosystems while maintaining flood protection for the floodplain’s inhabitants. The involvement of numerous stakeholders with disparate and often conflicting values and agendas generate a dynamic decision-making environment riddled with critical knowledge gaps, teeming with uncertainty, and driven by high stakes negotiations perpetuated by a sense of institutional urgency to embrace quick fixes. These highly uncertain, risky situations cannot be resolved solely with hard-science or technical solutions. The USACE needs a transparent and prescriptive approach grounded in collaborative adaptive management to address these wicked problems. Here, a suite of decision support tools has been developed to assist the USACE in their endeavors. An integrative framework is described herein that utilizes conceptual modeling to uncover critical lines of evidence that are then woven into a multimetric ecosystem response index to characterize benefits produced by proposed recovery plans. A series of GIS-based participatory strategies are deployed to locate and prioritize potential recovery sites, and an expert-based procedure is devised to forecast future conditions under a “no action” plan. A case study on the Missouri River addressing the recovery of the plains cottonwood community (Populus detltoides W. Bartram Marsh. Subsp. monilifera (Aiton) Eckenwalder), is used to demonstrate the value of the spiraling strategy and the spinoff toolsets. USACE can now utilize the entire suite to adaptively co-manage the system, transparently communicating the success of their recovery activities to the basin’s stakeholders and the public at large. ( en ) Advisors/Committee Members: KIKER,GREGORY A (committee chair), KITCHENS,WILEY MIRF (committee member), ZWICK,PAUL D (committee member), PRICE,DAVID L (committee member), HOCTOR,THOMAS SCOTT (committee member).

Subjects/Keywords: Cognitive models; Dams; Ecological modeling; Ecology; Ecosystem models; Ecosystems; Eris; Forests; Modeling; Rivers; approach – based – crisis – ecosystem – elicitation – expert – integrity – management – model – recursive – reflexive – response – sdss – spiral – transdisciplinary – wicked

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Burks-Copes, K. A. (2014). Finding Integrated Solutions to Wicked Environmental Challenges Ecosystem-Based Management of Cottonwood Communities on the Missouri River. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0046133

Chicago Manual of Style (16^th Edition):

Burks-Copes, Kelly A. “Finding Integrated Solutions to Wicked Environmental Challenges Ecosystem-Based Management of Cottonwood Communities on the Missouri River.” 2014. Doctoral Dissertation, University of Florida. Accessed December 15, 2019. http://ufdc.ufl.edu/UFE0046133.

MLA Handbook (7^th Edition):

Burks-Copes, Kelly A. “Finding Integrated Solutions to Wicked Environmental Challenges Ecosystem-Based Management of Cottonwood Communities on the Missouri River.” 2014. Web. 15 Dec 2019.

Vancouver:

Burks-Copes KA. Finding Integrated Solutions to Wicked Environmental Challenges Ecosystem-Based Management of Cottonwood Communities on the Missouri River. [Internet] [Doctoral dissertation]. University of Florida; 2014. [cited 2019 Dec 15]. Available from: http://ufdc.ufl.edu/UFE0046133.

Council of Science Editors:

Burks-Copes KA. Finding Integrated Solutions to Wicked Environmental Challenges Ecosystem-Based Management of Cottonwood Communities on the Missouri River. [Doctoral Dissertation]. University of Florida; 2014. Available from: http://ufdc.ufl.edu/UFE0046133

University of South Florida

11. Drexler, Michael. Evaluating the use of larval connectivity information in fisheries models and management in the Gulf of Mexico.

Degree: 2018, University of South Florida

URL: https://scholarcommons.usf.edu/etd/7499

► Connectivity is a major contributor to the overall dynamics of marine populations. However, it still remains challenging to describe connectivity on ecologically meaningful scales of… (more)

▼ Connectivity is a major contributor to the overall dynamics of marine populations. However, it still remains challenging to describe connectivity on ecologically meaningful scales of time and space. This is a major impediment to evaluating the impacts of marine protected area with respect to fisheries management objectives. This dissertation brings together a wide array of spatial and connectivity information in the Gulf of Mexico (GOM) with the goal of 1) understanding the spatial distribution of fish populations and source-sink dynamics and 2) evaluating whether this information can be integrated, through a modeling framework, to identify closed areas that could be beneficial to fisheries management in the Gulf of Mexico. First, a generalized additive modelling (GAM) approach is used to describe the distribution of a large number of species groups (i.e. functional groups) across the Gulf of Mexico (GOM) using a large fisheries independent data set (SEAMAP) and climate scale (decades) oceanographic conditions. Next a numerical Lagrangian particle transport model was developed that incorporates two major connectivity processes; site specific larval production and oceanographic transport for an entire large marine ecosystem and over multiple years. The two components are then combined to develop larval dispersal patterns for the entire GOM and identify areas operating as larval sources and sinks. Last, this information is integrated into an end-to-end ecosystem model to evaluate effectiveness of closing source and sink areas for the management of reef fish fisheries. Closed area managemeny simlautions for reef fish indicated closing reef fish source areas, as opposed to sinks, in the GOM is most efficient method of increasing total biomass and yield. However, the impacts across individual functional groups were site specific. Ultimately, these simulations demonstrate the inclusion of connectivity information could improve fishery management objectives in an ecosystem context.

Subjects/Keywords: ecosystem models; fisheries management; larval dispersal; marine protected area; Natural Resources Management and Policy

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Drexler, M. (2018). Evaluating the use of larval connectivity information in fisheries models and management in the Gulf of Mexico. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/7499

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Drexler, Michael. “Evaluating the use of larval connectivity information in fisheries models and management in the Gulf of Mexico.” 2018. Thesis, University of South Florida. Accessed December 15, 2019. https://scholarcommons.usf.edu/etd/7499.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Drexler, Michael. “Evaluating the use of larval connectivity information in fisheries models and management in the Gulf of Mexico.” 2018. Web. 15 Dec 2019.

Vancouver:

Drexler M. Evaluating the use of larval connectivity information in fisheries models and management in the Gulf of Mexico. [Internet] [Thesis]. University of South Florida; 2018. [cited 2019 Dec 15]. Available from: https://scholarcommons.usf.edu/etd/7499.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Drexler M. Evaluating the use of larval connectivity information in fisheries models and management in the Gulf of Mexico. [Thesis]. University of South Florida; 2018. Available from: https://scholarcommons.usf.edu/etd/7499

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Miami

12. Perryman, Holly A. Parameterization of an Ecosystem Model and Application for Assessing the Utility of Gulf of Mexico Pelagic Longline Spatial Closures.

Degree: PhD, Marine Biology and Fisheries (Marine), 2017, University of Miami

URL: https://scholarlyrepository.miami.edu/oa_dissertations/1822

► Many highly migratory predator stocks that occupy the Gulf of Mexico are at risk, and the collapse of stocks could harm fisheries and ecosystems. Two… (more)

▼ Many highly migratory predator stocks that occupy the Gulf of Mexico are at risk, and the collapse of stocks could harm fisheries and ecosystems. Two pelagic longline spatial closures within the pelagic waters of the Gulf of Mexico have been established to protect pelagic species. In 2000, a permanent closure was established around DeSoto Canyon, with the management objectives of reducing catch and rebuilding biomass of bycatch and incidental catch species while minimizing impact to catch of target species. In 2015, a seasonal closure was established off the Louisiana shelf (Spring Closure), with the management objectives of reducing catch and rebuilding biomass of bluefin tuna (Thunnus thynnus). Pelagic spatial closures are relatively untested management tools. Science-driven analysis, including the investigation of ecosystem impacts through mathematical modeling, is necessary to address their utility. This dissertation presents research used to parameterize an ecosystem model, Atlantis, for the Gulf of Mexico marine ecosystem, followed by a study that used the Gulf of Mexico Atlantis model to conduct a policy exploration of the utility of Gulf of Mexico pelagic longline spatial closures. Chapter 2 described the collection of Gulf of Mexico historical, species-specific landings data for the calibration of the Gulf of Mexico Atlantis model, and investigated areas of uncertainty and bias, focusing on outputs from the Gulf of Mexico Atlantis model and landings-based indicators, due to unidentified landings and lack of data. U.S. landings not identified to species did not appear to bias landings-based indicators, nor does the aggregation of landings into Gulf of Mexico Atlantis functional groups. Chapter 3 described Gulf-wide spatial distributions of pelagic predatory functional groups. Distributions were estimated with generalized additive models fitted with U.S. bottom longline survey catch data (coastal models), and U.S. pelagic longline commercial catch data (pelagic models). This work advanced our knowledge on the correlations between the spatial distribution of pelagic predators within the Gulf of Mexico and the environment, and improved upon the spatial distributions previously used for the Gulf of Mexico Atlantis model. Finally, Chapter 4 described a policy exploration assessing if current pelagic longline spatial closures within the Gulf of Mexico, DeSoto Canyon and Spring Closure, could meet management objectives and evaluated possible ecosystem impacts. DeSoto Canyon was more successful at achieving management objectives and had more influence to ecosystem performance metrics than Spring Closure. Closures reduced Gulf-wide catches of bycatch and incidental groups with little reduction to catches of target groups. Rebuilding biomass of particular stocks may require additional reductions in fishing mortality. The Atlantis framework allowed for the detailed, spatially-explicit representation of biota, fleets and spatial closures, and provided a means to explore broad-scale ecosystem impacts. This dissertation… Advisors/Committee Members: Elizabeth Babcock, David Die, Cameron Ainsworth, Joseph Serafy, Donald Olson, Michael Schirripa.

Subjects/Keywords: Gulf of Mexico; ecosystem modelling; landings data; generalized additive models; fishery closures

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Perryman, H. A. (2017). Parameterization of an Ecosystem Model and Application for Assessing the Utility of Gulf of Mexico Pelagic Longline Spatial Closures. (Doctoral Dissertation). University of Miami. Retrieved from https://scholarlyrepository.miami.edu/oa_dissertations/1822

Chicago Manual of Style (16^th Edition):

Perryman, Holly A. “Parameterization of an Ecosystem Model and Application for Assessing the Utility of Gulf of Mexico Pelagic Longline Spatial Closures.” 2017. Doctoral Dissertation, University of Miami. Accessed December 15, 2019. https://scholarlyrepository.miami.edu/oa_dissertations/1822.

MLA Handbook (7^th Edition):

Perryman, Holly A. “Parameterization of an Ecosystem Model and Application for Assessing the Utility of Gulf of Mexico Pelagic Longline Spatial Closures.” 2017. Web. 15 Dec 2019.

Vancouver:

Perryman HA. Parameterization of an Ecosystem Model and Application for Assessing the Utility of Gulf of Mexico Pelagic Longline Spatial Closures. [Internet] [Doctoral dissertation]. University of Miami; 2017. [cited 2019 Dec 15]. Available from: https://scholarlyrepository.miami.edu/oa_dissertations/1822.

Council of Science Editors:

Perryman HA. Parameterization of an Ecosystem Model and Application for Assessing the Utility of Gulf of Mexico Pelagic Longline Spatial Closures. [Doctoral Dissertation]. University of Miami; 2017. Available from: https://scholarlyrepository.miami.edu/oa_dissertations/1822

University of Florida

13. Morrison, Marc. Towards an Ecologically Sensitive Neighborhood Level Sustainability Assessment.

Degree: 2015, University of Florida

URL: http://ufdc.ufl.edu/AA00037436

► As the realities of climate change become more pressing, the availability of resources from far a field of city centers is destined to become more… (more)

Subjects/Keywords: Carbon; Cities; Datasets; Ecosystem models; Ecosystems; Jury sequestration; Land cover; Land use; Soils; Statistics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Morrison, M. (2015). Towards an Ecologically Sensitive Neighborhood Level Sustainability Assessment. (Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/AA00037436

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Morrison, Marc. “Towards an Ecologically Sensitive Neighborhood Level Sustainability Assessment.” 2015. Thesis, University of Florida. Accessed December 15, 2019. http://ufdc.ufl.edu/AA00037436.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Morrison, Marc. “Towards an Ecologically Sensitive Neighborhood Level Sustainability Assessment.” 2015. Web. 15 Dec 2019.

Vancouver:

Morrison M. Towards an Ecologically Sensitive Neighborhood Level Sustainability Assessment. [Internet] [Thesis]. University of Florida; 2015. [cited 2019 Dec 15]. Available from: http://ufdc.ufl.edu/AA00037436.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Morrison M. Towards an Ecologically Sensitive Neighborhood Level Sustainability Assessment. [Thesis]. University of Florida; 2015. Available from: http://ufdc.ufl.edu/AA00037436

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Florida

14. Fletcher, Pamela J. Using Participatory Decision Support to Improve Coral Reef Management.

Degree: PhD, Soil and Water Science, 2014, University of Florida

URL: http://ufdc.ufl.edu/UFE0046971

► Participatory decision support systems are a promising approach for planning for and responding to climate change due to the ability to integrate interdisciplinary datasets transparently… (more)

Subjects/Keywords: Climate change; Climate models; Coral reefs; Corals; Ecology; Ecosystem models; Ecosystems; Marine resources; Needs assessment; Oceanic climates; decision – participatory – socio-ecological

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fletcher, P. J. (2014). Using Participatory Decision Support to Improve Coral Reef Management. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0046971

Chicago Manual of Style (16^th Edition):

Fletcher, Pamela J. “Using Participatory Decision Support to Improve Coral Reef Management.” 2014. Doctoral Dissertation, University of Florida. Accessed December 15, 2019. http://ufdc.ufl.edu/UFE0046971.

MLA Handbook (7^th Edition):

Fletcher, Pamela J. “Using Participatory Decision Support to Improve Coral Reef Management.” 2014. Web. 15 Dec 2019.

Vancouver:

Fletcher PJ. Using Participatory Decision Support to Improve Coral Reef Management. [Internet] [Doctoral dissertation]. University of Florida; 2014. [cited 2019 Dec 15]. Available from: http://ufdc.ufl.edu/UFE0046971.

Council of Science Editors:

Fletcher PJ. Using Participatory Decision Support to Improve Coral Reef Management. [Doctoral Dissertation]. University of Florida; 2014. Available from: http://ufdc.ufl.edu/UFE0046971

15. Moutopoulos, Dimitrios. Οικοσυστημικά μοντέλα για τη μελέτη και τη διαχείριση της ελληνικής αλιείας: εφαρμογή στο Ιόνιο.

Degree: 2012, Πανεπιστήμιο Δυτικής Ελλάδας

URL: http://hdl.handle.net/10442/hedi/29234

► The results of the present study highlighted the Greek fisheries since the early period of 20th century and showed that Greek fisheries started to develop… (more)

▼ The results of the present study highlighted the Greek fisheries since the early period of 20th century and showed that Greek fisheries started to develop after the immigration of more than a million people from Turkey during 1923-1924 and the subsequent economic funding to Greek fisheries from the League of Nations, which can be viewed as an early capacity-enhancing subsidies scheme. The historic evolution of Greek fisheries landings during 1928-2007 displayed four distinct patterns corresponding to four phases of Greek fisheries development: (1) a gradual increase during 1928-1949, (2) a steeper increase during 1950-1969, (3) a much steeper linear increase during 1970-1994 and (4) a declining trend during 1995-2007. These phases coincided chronologically with significant socio-economic and political events that took place in Greece since 1928. During the pre-development phase, the mean (during 1928-1946) annual landings were 11.3 times lower when compared to the landings of the 1994 peak indicating that this period could characterized as a period when the fishery exploitation is limitited. The reconstruction of fisheries landings by species, gear and subarea from all Greek Seas during 1928-2007 showed that total landings time series as well as those of each gear separately highly increased from 1928 up to mid 1990’s and then declined for the remaining years. The same trend was almost true for the vast majority of the total landings for all species combined and for the most abundant species, per gear and subarea depending on each case. The general trend identified for the reconstructed landings were not the result of aggregating landings over different gears and subareas, but rather a general pattern for most gears, subareas and dominant species. Apart from studying the historical development of the Greek fisheries, the main reason for recontructing Greek fisheries landings was to use this data for applying various ecological indices/analyses on a gear/subarea basis and to develop ecosystem-based models for comparing different management scenarios for Greek fisheries. Before the use of fisheries landings to the estimation of ecological indices, the evaluation of the official fisheries landings indentified strange patterns and unusal estimates on the data. The results showed that certain administrative and technical deficiencies seemed to increase the bias and uncertainties of the Greek national landings due to: (a) deficiencies in administrative organization among the local custom port authorities monitoring fisheries statistics (i.e. correlations among far-away distant subareas that are likely not attributed to ecosystem changes); (b) the delay in the harmonization of new sampling schemes (i.e. sudden appearances or disappearances of common species) that was established by HELSTAT since 1982; and (c) other external factors (i.e. the increase of the value of fuels) that influence the sampling procedure. For instance, the high increase of Greek national landings during 1990-1994 (by 63%) is quite possible to coincide…

Subjects/Keywords: Ελληνική αλιεία; Ιστορία της αλιείας; Ανασύσταση δεδομένων αλιείας; Οικοσυστημικοί δείκτες; Οικοσυστημικά μοντέλα; Greek fisheries; History of fisheries; Reconstruction of greek fisheries data; Ecosystem-based indices; Ecosystem-based models

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Moutopoulos, D. (2012). Οικοσυστημικά μοντέλα για τη μελέτη και τη διαχείριση της ελληνικής αλιείας: εφαρμογή στο Ιόνιο. (Thesis). Πανεπιστήμιο Δυτικής Ελλάδας. Retrieved from http://hdl.handle.net/10442/hedi/29234

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Moutopoulos, Dimitrios. “Οικοσυστημικά μοντέλα για τη μελέτη και τη διαχείριση της ελληνικής αλιείας: εφαρμογή στο Ιόνιο.” 2012. Thesis, Πανεπιστήμιο Δυτικής Ελλάδας. Accessed December 15, 2019. http://hdl.handle.net/10442/hedi/29234.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Moutopoulos, Dimitrios. “Οικοσυστημικά μοντέλα για τη μελέτη και τη διαχείριση της ελληνικής αλιείας: εφαρμογή στο Ιόνιο.” 2012. Web. 15 Dec 2019.

Vancouver:

Moutopoulos D. Οικοσυστημικά μοντέλα για τη μελέτη και τη διαχείριση της ελληνικής αλιείας: εφαρμογή στο Ιόνιο. [Internet] [Thesis]. Πανεπιστήμιο Δυτικής Ελλάδας; 2012. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/10442/hedi/29234.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Moutopoulos D. Οικοσυστημικά μοντέλα για τη μελέτη και τη διαχείριση της ελληνικής αλιείας: εφαρμογή στο Ιόνιο. [Thesis]. Πανεπιστήμιο Δυτικής Ελλάδας; 2012. Available from: http://hdl.handle.net/10442/hedi/29234

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Swedish University of Agricultural Sciences

16. Östberg, Katarina. Non-market valuation of coastal ecosystem services.

Degree: 2016, Swedish University of Agricultural Sciences

URL: http://pub.epsilon.slu.se/13351/

► Marine and coastal ecosystems provide benefits to people through the provision of seafood, maintenance of water quality and several other valuable ecosystem services. The need… (more)

▼ Marine and coastal ecosystems provide benefits to people through the provision of seafood, maintenance of water quality and several other valuable ecosystem services. The need to understand these benefits in economic terms has never been more pressing. Contingent valuation and choice experiments are survey-based non-market valuation methods that can be applied to estimate the values of these benefits. This thesis aims to address some of the challenges facing non-market valuation of coastal ecosystem services, comprising a summary and four appended papers that are based on two separate studies designed to value coastal ecosystem services in two archipelago areas in Sweden. Paper I addresses the challenge of creating and describing a contingent valuation scenario so as to achieve content validity. A holistic valuation scenario based on ecological measures that are well connected to policy was developed and is described and evaluated. Sometimes when decisions have to be made and new valuation studies are impossible due to time and funding restrictions, estimates from existing studies can be transferred to a new setting, an approach referred to as benefit transfer. Including socio-economic information in choice experiment models for benefit transfer is addressed in Paper II. The findings suggest that a more ‘general’ model based on socio-economic information that can be easily obtained from public databases performs quite well as a model that would require the collection of more detailed information. Paper III addresses distributional effects of environmental policies affecting coastal ecosystem services. The study presents information regarding distributional effects in both monetary terms and in terms of environmental quality for different socio-economic groups. Paper IV addresses the important topic of model selection uncertainty for choice experiments in environmental valuation. To be able to ensure robustness of results, this study proposes an information-theoretic approach for model selection. The findings also indicate that greater attention should be paid to potential policy implications that may follow from different model specifications.

Subjects/Keywords: coasts; marine environment; ecosystem services; use value; valuation; economic analysis; models; statistical methods; sweden; non-market valuation; contingent valuation; choice experiment; benefit transfer; distributional effects; model selection; coastal ecosystem services

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Östberg, K. (2016). Non-market valuation of coastal ecosystem services. (Doctoral Dissertation). Swedish University of Agricultural Sciences. Retrieved from http://pub.epsilon.slu.se/13351/

Chicago Manual of Style (16^th Edition):

Östberg, Katarina. “Non-market valuation of coastal ecosystem services.” 2016. Doctoral Dissertation, Swedish University of Agricultural Sciences. Accessed December 15, 2019. http://pub.epsilon.slu.se/13351/.

MLA Handbook (7^th Edition):

Östberg, Katarina. “Non-market valuation of coastal ecosystem services.” 2016. Web. 15 Dec 2019.

Vancouver:

Östberg K. Non-market valuation of coastal ecosystem services. [Internet] [Doctoral dissertation]. Swedish University of Agricultural Sciences; 2016. [cited 2019 Dec 15]. Available from: http://pub.epsilon.slu.se/13351/.

Council of Science Editors:

Östberg K. Non-market valuation of coastal ecosystem services. [Doctoral Dissertation]. Swedish University of Agricultural Sciences; 2016. Available from: http://pub.epsilon.slu.se/13351/

University of Florida

17. Lee, Seungjun. Effect of Disturbance on Ecosystem Processes.

Degree: PhD, Environmental Engineering Sciences, 2010, University of Florida

URL: http://ufdc.ufl.edu/UFE0042450

► One of the ecosystem management goals is to understand how disturbance regimes influence an ecosystem's traits and integrate the regimes into management criteria. This study… (more)

▼ One of the ecosystem management goals is to understand how disturbance regimes influence an ecosystem's traits and integrate the regimes into management criteria. This study contributes to the understanding of ecosystem energetics under disturbance by investigating the relationships between disturbance and ecosystem processes in the context of the current ecological paradigms: intermediate disturbance hypothesis (IDH), ecosystem maturity, and pulsing. The responses of gross primary productivity (GPP) and ecosystem respiration rate (ER) to water motion disturbance regimes were tested using open top aquatic microcosms, and the mechanisms of the resultant patterns from the microcosms were suggested by computer simulation models. Each microcosm developed a unique system and maintained a balance between GPP and ER through the self-organizing processes. Each microcosm showed a distinct relationship between disturbance regime and GPP. The mechanisms for the distinct relationships were explained by changes of efficiencies in energy flow pathways of a system under disturbances and by a disturbance threshold above which the efficiencies are permanently altered. The tests of the disturbance effects on GPP and ER under different maturities of microcosms supported the current theory on the ecosystem's development arguing that an ecosystem reinforces internal structures and thus becomes more resistant to disturbances over time. GPP and ER oscillated over time in the microcosms, and the wavelength and amplitude of the GPP and ER pulsing patterns were amplified by disturbance in microcosms' early stages of development, compared with those of an undisturbed system. As originally intended, the combined study of microcosms and simulation models provided new hypotheses on disturbance and ecosystem processes, which need to be tested further using microcosms, simulation models, or in the field. ( en ) Advisors/Committee Members: Brown, Mark T. (committee chair), Cohen, Matthew (committee member), Montague, Clay L. (committee member), Zwick, Paul D. (committee member).

Subjects/Keywords: Alkalinity; Ecological modeling; Ecology; Ecosystem models; Ecosystems; Microcosms; Modeling; Productivity; Simulations; Time series; disturbance, ecosystem, er, gpp, idh, maturity, microcosm, model, processes, productivity, pulsing, resilience, resistance, respiration, selforganization, simulation

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lee, S. (2010). Effect of Disturbance on Ecosystem Processes. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0042450

Chicago Manual of Style (16^th Edition):

Lee, Seungjun. “Effect of Disturbance on Ecosystem Processes.” 2010. Doctoral Dissertation, University of Florida. Accessed December 15, 2019. http://ufdc.ufl.edu/UFE0042450.

MLA Handbook (7^th Edition):

Lee, Seungjun. “Effect of Disturbance on Ecosystem Processes.” 2010. Web. 15 Dec 2019.

Vancouver:

Lee S. Effect of Disturbance on Ecosystem Processes. [Internet] [Doctoral dissertation]. University of Florida; 2010. [cited 2019 Dec 15]. Available from: http://ufdc.ufl.edu/UFE0042450.

Council of Science Editors:

Lee S. Effect of Disturbance on Ecosystem Processes. [Doctoral Dissertation]. University of Florida; 2010. Available from: http://ufdc.ufl.edu/UFE0042450

University of Florida

18. Cole, Zac. Mapping Social Values of Ecosystem Services in Sarasota Bay, Florida E-Delphi Application, Typology Development, and Geospatial Modeling.

Degree: PhD, Health and Human Performance - Tourism, Recreation, and Sport Management, 2012, University of Florida

URL: http://ufdc.ufl.edu/UFE0044488

► This study represents a three phase project that sought to delineate social values of ecosystem services specific to the coastal zone, apply the resultant social… (more)

Subjects/Keywords: Assessed values; Cultural values; Ecology; Ecosystem models; Ecosystems; Information economics; Landscapes; Natural resource management; Recreation; Research methods; coastal – ecosystem – gis – mapping – services – social – stakeholder – values

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cole, Z. (2012). Mapping Social Values of Ecosystem Services in Sarasota Bay, Florida E-Delphi Application, Typology Development, and Geospatial Modeling. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0044488

Chicago Manual of Style (16^th Edition):

Cole, Zac. “Mapping Social Values of Ecosystem Services in Sarasota Bay, Florida E-Delphi Application, Typology Development, and Geospatial Modeling.” 2012. Doctoral Dissertation, University of Florida. Accessed December 15, 2019. http://ufdc.ufl.edu/UFE0044488.

MLA Handbook (7^th Edition):

Cole, Zac. “Mapping Social Values of Ecosystem Services in Sarasota Bay, Florida E-Delphi Application, Typology Development, and Geospatial Modeling.” 2012. Web. 15 Dec 2019.

Vancouver:

Cole Z. Mapping Social Values of Ecosystem Services in Sarasota Bay, Florida E-Delphi Application, Typology Development, and Geospatial Modeling. [Internet] [Doctoral dissertation]. University of Florida; 2012. [cited 2019 Dec 15]. Available from: http://ufdc.ufl.edu/UFE0044488.

Council of Science Editors:

Cole Z. Mapping Social Values of Ecosystem Services in Sarasota Bay, Florida E-Delphi Application, Typology Development, and Geospatial Modeling. [Doctoral Dissertation]. University of Florida; 2012. Available from: http://ufdc.ufl.edu/UFE0044488

University of Florida

19. Alvarez, Sergio. Three Essays in the Economics of Marine Resource Management.

Degree: PhD, Food and Resource Economics, 2013, University of Florida

URL: http://ufdc.ufl.edu/UFE0045188

► During the past 200 years the world’s oceans have experienced drastic changes as a result of increasing pressure from a growing population whose appetites for… (more)

▼ During the past 200 years the world’s oceans have experienced drastic changes as a result of increasing pressure from a growing population whose appetites for seafood, recreation, energy sources and other marine resources seem to have no bounds. The oceans, once thought of as an indestructible and inexhaustible resource, are now under great pressure from overfishing, pollution, and modification of marine and coastal environments. We are now learning to cope with the resulting disruption of ecological processes while trying to maintain the flows of marine resources that we have grown so accustomed to. This dissertation focuses on the role that approaches based on economics can play in the management of marine resources. We focus on two particular problems facing the earth’s oceans and coastal areas. The first of these problems is water pollution and its effect on recreational use of marine resources. The second problem is the study and management of marine resources from a holistic perspective on an ecosystem-wide scale. Both of these problems have become central in today’s marine resource management, as a burgeoning population increases its standards of living and demands an ever increasing amount of seafood, energy, and recreational opportunities. This dissertation is an attempt to better understand the effects of this increased demand and propose some ways in which society’s management of marine resources can be improved. The first essay deals with the effects of pollution of the marine environment from the worst oil spill in U.S. history—the Deepwater Horizon—on recreational use of marine resources, specifically recreational fishing. The main result from this essay is the estimation of monetary compensation measures which could be used in damage assessment and litigation. The second essay reviews the use of portfolio theory for natural resource management and illustrates the approach by developing portfolio selection models that could be used to set allowable catch policies in marine ecosystems. The third essay summarizes the development of a simple ecosystem model in Ecopath with Ecosim, one of the leading platforms for development of such models, and its use for conducting analyses of an economic nature. ( en ) Advisors/Committee Members: Larkin, Sherry L (committee chair), Adams, Charles M (committee member), Weldon, Richard N (committee member), Valderrama, Diego (committee member), Allen, Micheal S (committee member).

Subjects/Keywords: Assets; Ecosystem models; Ecosystems; Financial portfolios; Fish; Fisheries; Fishers; Fishing; Natural resources; Oil spills; economics – ecosystem – fisheries – management – oil – portfolio – resources – spills – valuation

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alvarez, S. (2013). Three Essays in the Economics of Marine Resource Management. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0045188

Chicago Manual of Style (16^th Edition):

Alvarez, Sergio. “Three Essays in the Economics of Marine Resource Management.” 2013. Doctoral Dissertation, University of Florida. Accessed December 15, 2019. http://ufdc.ufl.edu/UFE0045188.

MLA Handbook (7^th Edition):

Alvarez, Sergio. “Three Essays in the Economics of Marine Resource Management.” 2013. Web. 15 Dec 2019.

Vancouver:

Alvarez S. Three Essays in the Economics of Marine Resource Management. [Internet] [Doctoral dissertation]. University of Florida; 2013. [cited 2019 Dec 15]. Available from: http://ufdc.ufl.edu/UFE0045188.

Council of Science Editors:

Alvarez S. Three Essays in the Economics of Marine Resource Management. [Doctoral Dissertation]. University of Florida; 2013. Available from: http://ufdc.ufl.edu/UFE0045188

Purdue University

20. Liu, Shaoqing. Quantifying terrestrial ecosystem carbon dynamics with mechanistically-based biogeochemistry models and in situ and remotely sensed data.

Degree: PhD, Earth, Atmospheric, and Planetary Sciences, 2016, Purdue University

URL: https://docs.lib.purdue.edu/open_access_dissertations/968

► Terrestrial ecosystem plays a critical role in the global carbon cycle and climate system. Therefore, it is important to accurately quantify the carbon dynamics… (more)

▼ Terrestrial ecosystem plays a critical role in the global carbon cycle and climate system. Therefore, it is important to accurately quantify the carbon dynamics of terrestrial ecosystem under future climatic change condition. This dissertation evaluates the regional carbon dynamics by using upscaling approach, mechanistically-based biogeochemistry models and in situ and remotely sensed data. The upscaling studies based on FLUXNET network has provided us the spatial and temporal pattern of the carbon fluxes but it fails to consider the atmospheric CO2 effect given its important physiological role in carbon assimilation. In the second chapter, we consider the effect of atmospheric CO2 using an artificial neural network (ANN) approach to upscale the AmeriFlux tower of net ecosystem exchange (NEE) and the derived gross primary productivity (GPP) to the conterminous United States. We found that atmospheric CO 2effect on GPP/NEE exhibited a great spatial and seasonal variability. Further analysis suggested that air temperature played an important role in determining the atmospheric CO2 effects on carbon fluxes. In addition, the simulation that did not consider atmospheric CO2 failed to detect ecosystem responses to droughts in part of the US in 2006. The study suggested that the spatially and temporally varied atmospheric CO2 concentrations should be factored into carbon quantification when scaling eddy flux data to a region. The process-based ecosystem models are useful tools to predicting future change in the terrestrial ecosystem. However, they suffer the great uncertainty induced by model structure and parameters. The carbon isotope (13C) discrimination by terrestrial plants, involves the biophysical and biogeochemistry processes and exhibits seasonal and spatial variations, which may provide additional constraints on model parameters. In the third chapter, we found that using foliar 13C composition data, model parameters were constrained to a relatively narrow space and the site-level model simulations were slightly better than that without the foliar 13C constraint. The model extrapolations with three stomatal schemes all showed that the estimation uncertainties of regional carbon fluxes were reduced by about 40%. In addition, tree ring data have great potentials in addressing the forest response to climatic changes compared with mechanistic model simulations, eddy flux measurement and manipulative experiments. In the fourth chapter, we collected the tree ring isotopic carbon data at 12 boreal forest sites to develop a linear regression model, and the model was extrapolated to the whole boreal region to obtain the water use efficiency (WUE) and GPP spatial and temporal variation from 1948 to 2010. Our results demonstrated that most of boreal regions except parts of Alaska showed a significant increasing WUE trend during the study period and the increasing magnitude was much higher than estimations from other land surface models. Our predicted GPP by the WUE definition algorithm was comparable… Advisors/Committee Members: Yuch-Ning Shieh, Yuch-Ning Shieh, Greg Michalski, Devdutta S. Niyogi, Qianlai Zhuang.

Subjects/Keywords: Social sciences; Biological sciences; Health and environmental sciences; Atmospheric CO2; Carbon cycle; Process-based ecosystem models; Stable carbon isotope; Terrestrial ecosystem; Tree ring; Ecology and Evolutionary Biology; Environmental Sciences; Geography

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liu, S. (2016). Quantifying terrestrial ecosystem carbon dynamics with mechanistically-based biogeochemistry models and in situ and remotely sensed data. (Doctoral Dissertation). Purdue University. Retrieved from https://docs.lib.purdue.edu/open_access_dissertations/968

Chicago Manual of Style (16^th Edition):

Liu, Shaoqing. “Quantifying terrestrial ecosystem carbon dynamics with mechanistically-based biogeochemistry models and in situ and remotely sensed data.” 2016. Doctoral Dissertation, Purdue University. Accessed December 15, 2019. https://docs.lib.purdue.edu/open_access_dissertations/968.

MLA Handbook (7^th Edition):

Liu, Shaoqing. “Quantifying terrestrial ecosystem carbon dynamics with mechanistically-based biogeochemistry models and in situ and remotely sensed data.” 2016. Web. 15 Dec 2019.

Vancouver:

Liu S. Quantifying terrestrial ecosystem carbon dynamics with mechanistically-based biogeochemistry models and in situ and remotely sensed data. [Internet] [Doctoral dissertation]. Purdue University; 2016. [cited 2019 Dec 15]. Available from: https://docs.lib.purdue.edu/open_access_dissertations/968.

Council of Science Editors:

Liu S. Quantifying terrestrial ecosystem carbon dynamics with mechanistically-based biogeochemistry models and in situ and remotely sensed data. [Doctoral Dissertation]. Purdue University; 2016. Available from: https://docs.lib.purdue.edu/open_access_dissertations/968

Universidade Federal de Viçosa

21. Carla Rodrigues Ribas. Gradiente latitudinal de riqueza de espécies de formigas em cerrado: regra de Rapoport e efeitos da produtividade e heterogeneidade.

Degree: 2006, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=187

►

O gradiente latitudinal de riqueza de espécies (GLRE) é um padrão bem documentado para diversos grupos de organismos. Apesar de várias hipóteses terem sido levantadas… (more)

▼

O gradiente latitudinal de riqueza de espécies (GLRE) é um padrão bem documentado para diversos grupos de organismos. Apesar de várias hipóteses terem sido levantadas para explicar o gradiente algumas são tidas como mais promissoras, tais como as relacionadas à energia, a heterogeneidade ambiental, ao tempo evolutivo e ao efeito do domínio mediano. O objetivo dessa tese é testar a existência do gradiente latitudinal de riqueza de espécies de formigas arborícolas em cerrado, assim como testar hipóteses explicativas para o padrão encontrado. No primeiro capítulo propusemos um método que permite testar o efeito Rapoport em gradientes altitudinais, latitudinais e em distribuições que são restritas arbitrariamente pela área amostrada pelo pesquisador. Reanalisamos 55 distribuições publicadas em 39 artigos e observamos diversos padrões de correlação entre a extensão de ocorrência das espécies e seu ponto médio de distribuição, poucos evidenciando o efeito Rapoport. A maioria dos métodos utilizados até hoje para testar o efeito Rapoport não são capazes de distinguir entre padrões determinísticos e aqueles gerados pelo acaso e o efeito Rapoport não deve ser considerado como um padrão em macroecologia. No segundo capítulo, o objetivo foi testar a existência do GLRE de formigas no Cerrado e a hipótese de que o gradiente é correlacionado com a produtividade e heterogeneidade do habitat em diferentes escalas espaciais. Observamos um aumento da riqueza de espécies com a latitude, um gradiente latitudinal oposto ao encontrado na literatura. As variáveis ambientais analisadas não explicaram a variação da riqueza de espécies. Provavelmente, processos importantes em escalas espaciais locais não levam a variação da riqueza de espécies em escalas globais. No terceiro capítulo testamos a existência do efeito do domínio mediano e do efeito Rapoport usando modelos nulos. Encontramos uma riqueza de espécies maior do que esperado pelo efeito do domínio mediano em locais de maior latitude e ao invés do efeito Rapoport, as extensões de ocorrência das espécies são maiores do que o esperado pelo acaso somente nos limites do domínio. Outras hipóteses como a distribuição geográfica do Cerrado e a história evolutiva das espécies de formigas devem ser investigadas como causadoras do gradiente latitudinal reverso de riqueza de espécies de formigas arborícolas em Cerrado.

The latitudinal gradient in species richness is a well recognized pattern for several taxa. Although many hypotheses have been proposed to explain this gradient some of them are described as more relevant, such as those related to ambient energy, habitat heterogeneity, evolutionary time and mid-domain effect. The aim of this thesis was to test the existence of the latitudinal gradient in arboreal ant species richness at Cerrado, as well as to test explanatory hypothesis for the pattern found. In the first chapter we proposed a method that allowed testing the Rapoport effect in altitudinal and latitudinal distributions and in distributions that are restricted by the sampled area.…

Advisors/Committee Members: Carlos Frankl Sperber, José Henrique Schoereder, Og Francisco Fonseca de Souza, Júlio Neil Cassa Louzada, Heraldo Luis de Vasconcelos.

Subjects/Keywords: Formiga; Ecologia do Cerrado; Diversidade biológica; Ecossistema; Modelos nulos; ECOLOGIA; Ants; Ecology of Cerrado; Biological diversity; Ecosystem; Null models

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ribas, C. R. (2006). Gradiente latitudinal de riqueza de espécies de formigas em cerrado: regra de Rapoport e efeitos da produtividade e heterogeneidade. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=187

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ribas, Carla Rodrigues. “Gradiente latitudinal de riqueza de espécies de formigas em cerrado: regra de Rapoport e efeitos da produtividade e heterogeneidade.” 2006. Thesis, Universidade Federal de Viçosa. Accessed December 15, 2019. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=187.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ribas, Carla Rodrigues. “Gradiente latitudinal de riqueza de espécies de formigas em cerrado: regra de Rapoport e efeitos da produtividade e heterogeneidade.” 2006. Web. 15 Dec 2019.

Vancouver:

Ribas CR. Gradiente latitudinal de riqueza de espécies de formigas em cerrado: regra de Rapoport e efeitos da produtividade e heterogeneidade. [Internet] [Thesis]. Universidade Federal de Viçosa; 2006. [cited 2019 Dec 15]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=187.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ribas CR. Gradiente latitudinal de riqueza de espécies de formigas em cerrado: regra de Rapoport e efeitos da produtividade e heterogeneidade. [Thesis]. Universidade Federal de Viçosa; 2006. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=187

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Technical University of Lisbon

22. Correia, Alexandra Cristina Pires. Balanço de carbono em ecossistemas mediterrânicos.

Degree: 2013, Technical University of Lisbon

URL: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6153

►

Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia

Forests play an important role in climate change mitigation as they sequester… (more)

Subjects/Keywords: carbon balance; Pinus pinea; allometric models; soil respiration; Bayesian statistic; Cistus; Ulex; eddy covariance; upscaling; Mediterranean ecosystem

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Correia, A. C. P. (2013). Balanço de carbono em ecossistemas mediterrânicos. (Thesis). Technical University of Lisbon. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6153

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Correia, Alexandra Cristina Pires. “Balanço de carbono em ecossistemas mediterrânicos.” 2013. Thesis, Technical University of Lisbon. Accessed December 15, 2019. http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6153.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Correia, Alexandra Cristina Pires. “Balanço de carbono em ecossistemas mediterrânicos.” 2013. Web. 15 Dec 2019.

Vancouver:

Correia ACP. Balanço de carbono em ecossistemas mediterrânicos. [Internet] [Thesis]. Technical University of Lisbon; 2013. [cited 2019 Dec 15]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6153.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Correia ACP. Balanço de carbono em ecossistemas mediterrânicos. [Thesis]. Technical University of Lisbon; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/6153

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Edinburgh

23. Scott, Vivian. Assessing uncertainty in models of the ocean carbon cycle.

Degree: PhD, 2010, University of Edinburgh

URL: http://hdl.handle.net/1842/4360

► In this thesis I explore the effect of parameter uncertainty in ocean biogeochemical models on the calculation of carbon uptake by the ocean. The ocean… (more)

▼ In this thesis I explore the effect of parameter uncertainty in ocean biogeochemical models on the calculation of carbon uptake by the ocean. The ocean currently absorbs around a quarter of the annual anthropogenic CO2 emissions to the atmosphere [Scholes et al., 2009], slowing the increase in radiative forcing associated with the increasing atmospheric CO2 concentration. Ocean biogeochemical models have been developed to study the role of the ocean ecosystem in this process. Such models consist of a greatly simplified representation of the hugely complex ocean ecosystem. This simplification requires extensive parameterisation of the biological processes that convert inorganic carbon to and from organic carbon in the ocean. The HadOCC ocean biogeochemical model is a Nutrient-Phytoplankton-Zooplankton-Detritus (NPZD) model that is used to represent the role of the ocean ecosystem in the global carbon cycle in the HadCM3 and FAMOUS GCMs. HadOCC uses twenty parameters to control the processes of biological growth, mortality, grazing and detrital sinking that control the uptake and cycling of carbon in the ocean ecosystem. These parameters represent highly complex and in some cases incompletely understood biological processes, and as a result are uncertain in value. A sensitivity analysis is performed to identify the HadOCC parameters that due to uncertainty in value have the greatest possible effect on the exchange of CO2 between the atmosphere and the ocean—the air-sea CO2 flux. These are found to be the parameters that control phytoplankton growth in the well lit surface ocean, the formation of carbonate by marine organisms and the sinking of biological detritus. The uncertainty in these parameters is found to cause changes to the air-sea CO2 flux calculated by the FAMOUS GCM. The initial effect of these changes is equivalent to the order of the error of current estimates of the net annual carbon uptake by the ocean (2.2 ± 0.3 Pg C y−1 [Gruber et al., 2009], 2.2 ± 0.5 Pg C y−1 [Denman et al., 2007]). This indicates that while the effect of ocean biogeochemical parameter uncertainty is non-negligible, it is within the bounds of the uncertainty of the total (inorganic and organic) ocean carbon system, and is considerably less than the uncertainty in the carbon uptake of the terrestrial biosphere [Houghton, 2007]. However, as the ocean plays a crucial role in the global carbon cycle and the regulation of the Earth’s climate, further understanding and better modelling of the role of the ocean ecosystem in the global carbon cycle and its reaction to anthropogenic climate forcing remains important.

Subjects/Keywords: 551.46; ocean biogeochemical models; CO2 absorbtion; ocean ecosystem; Nutrient-Phytoplankton-Zooplankton-Detritus model; HadOCC parameters; phytoplankton growth

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Scott, V. (2010). Assessing uncertainty in models of the ocean carbon cycle. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/4360

Chicago Manual of Style (16^th Edition):

Scott, Vivian. “Assessing uncertainty in models of the ocean carbon cycle.” 2010. Doctoral Dissertation, University of Edinburgh. Accessed December 15, 2019. http://hdl.handle.net/1842/4360.

MLA Handbook (7^th Edition):

Scott, Vivian. “Assessing uncertainty in models of the ocean carbon cycle.” 2010. Web. 15 Dec 2019.

Vancouver:

Scott V. Assessing uncertainty in models of the ocean carbon cycle. [Internet] [Doctoral dissertation]. University of Edinburgh; 2010. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/1842/4360.

Council of Science Editors:

Scott V. Assessing uncertainty in models of the ocean carbon cycle. [Doctoral Dissertation]. University of Edinburgh; 2010. Available from: http://hdl.handle.net/1842/4360

Florida Atlantic University

24. Forbes, Dolores J. Generating space-time hypotheses in complex social-ecological systems.

Degree: 2014, Florida Atlantic University

URL: http://purl.flvc.org/fau/fd/FA00004284

►

Summary: As ecosystems degrade globally, ecosystem services that support life are increasingly threatened. Indications of degradation are occurring in the Northern Indian River Lagoon (IRL)… (more)

▼

Summary: As ecosystems degrade globally, ecosystem services that support life are increasingly threatened. Indications of degradation are occurring in the Northern Indian River Lagoon (IRL) estuary in east central Florida. Factors associated with ecosystem degradation are complex, including climate and land use change. Ecosystem research needs identified by the Millennium Ecosystem Assessment (MA) include the need to: consider the social with the physical; account for dynamism and change; account for complexity; address issues of scale; and focus on ecosystem structure and process. Ecosystems are complex, self-organizing, multi-equilibrial, non-linear, middle-number systems that exist in multiple stable states. Results found are relative to the observation and the frame of analysis, requiring multi-scaled analytical techniques. This study addresses the identified ecosystem research needs and the complexity of the associated factors given these additional constraints. Relativity is addressed through univariate analysis of dissolved oxygen as a measure of the general health of the Northern IRL. Multiple spatial levels are employed to associate social process scales with physical process scales as basin, sub-basins, and watersheds. Scan statistics return extreme value clusters in space-time. Wavelet transforms decompose time-scales of cyclical data using varying window sizes to locate change in process scales in space over time. Wavelet transform comparative methods cluster temporal process scales across space. Combined these methods describe the space-time structure of process scales in a complex ecosystem relative to the variable examined, where the highly localized results allow for connection to unexamined variables.

2014

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2014.

Collection: FAU

Advisors/Committee Members: Xie, Zhixiao (Thesis advisor), Florida Atlantic University (Degree grantor), Charles E. Schmidt College of Science, Department of Geosciences.

Subjects/Keywords: Environmental sciences – Mathematical models; Indian River (Fla. : Lagoon) – Environmental aspects; Marine ecosystem management – Florida – Indian River (Lagoon); Sustainable development; Wavelets (Mathematics)

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Forbes, D. J. (2014). Generating space-time hypotheses in complex social-ecological systems. (Thesis). Florida Atlantic University. Retrieved from http://purl.flvc.org/fau/fd/FA00004284

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Forbes, Dolores J. “Generating space-time hypotheses in complex social-ecological systems.” 2014. Thesis, Florida Atlantic University. Accessed December 15, 2019. http://purl.flvc.org/fau/fd/FA00004284.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Forbes, Dolores J. “Generating space-time hypotheses in complex social-ecological systems.” 2014. Web. 15 Dec 2019.

Vancouver:

Forbes DJ. Generating space-time hypotheses in complex social-ecological systems. [Internet] [Thesis]. Florida Atlantic University; 2014. [cited 2019 Dec 15]. Available from: http://purl.flvc.org/fau/fd/FA00004284.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Forbes DJ. Generating space-time hypotheses in complex social-ecological systems. [Thesis]. Florida Atlantic University; 2014. Available from: http://purl.flvc.org/fau/fd/FA00004284

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona

25. Christoffersen, Bradley. The Ecohydrological Mechanisms of Resilience and Vulnerability of Amazonian Tropical Forests to Water Stress .

Degree: 2013, University of Arizona

URL: http://hdl.handle.net/10150/293566

► Predicting the interactions between climate change and ecosystems remains a core problem in global change research; tropical forest ecosystems are of particular importance because of… (more)

▼ Predicting the interactions between climate change and ecosystems remains a core problem in global change research; tropical forest ecosystems are of particular importance because of their disproportionate role in global carbon and water cycling. Amazonia is unique among tropical forest ecosystems, exhibiting a high degree of coupling with its regional hydrometeorology, such that the stability of the entire forest-climate system is dependent on the functioning of its component parts. Belowground ecohydrological interactions between soil moisture environments and the roots which permeate them initiate the water transport pathway to leaf stomata, yet despite the disproportionate role they play in vegetation-atmosphere coupling in Amazonian forest ecosystems, the impacts of climate variability on the belowground environment remain understudied. The research which follows is designed to address critical knowledge gaps in our understanding of root functioning in Amazonian tropical forests as it relates to seasonality and extremes in belowground moisture regime as well as discerning which ecohydrological mechanisms govern ecosystem-level processes of carbon and water flux. A secondary research theme is the evaluation and use of models of ecosystem function as applied to Amazonia - these models are the "knowledge boxes" which build in the ecohydrological hypotheses (some testable than others) deemed to be most important for the forest ecosystems of Amazonia. In what follows, I investigate (i) which mechanisms of water supply (from the soil environment) and water demand (by vegetation) regulate the magnitude and seasonality of evapotranspiration across broad environmental gradients of Amazonia, (ii) how specific hypotheses of root function are or are not corroborated by soil moisture measurements conducted under normal seasonal and experimentally-induced extreme drought conditions, and (iii) the linkage between an extreme drought event with associated impacts on root zone soil moisture, the inferred response of root water uptake, and the observed impacts on ecosystem carbon and water flux in an east central Amazonian forest. Advisors/Committee Members: Saleska, Scott R (advisor), Enquist, Brian J. (committeemember), Huxman, Travis E. (committeemember), Zeng, Xubin (committeemember), Ferré, Paul A. (committeemember), Saleska, Scott R. (committeemember).

Subjects/Keywords: ecosystem land surface models; eddy covariance; plant water relations; root dynamics; tropical forests; Ecology & Evolutionary Biology; Amazonia

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Christoffersen, B. (2013). The Ecohydrological Mechanisms of Resilience and Vulnerability of Amazonian Tropical Forests to Water Stress . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/293566

Chicago Manual of Style (16^th Edition):

Christoffersen, Bradley. “The Ecohydrological Mechanisms of Resilience and Vulnerability of Amazonian Tropical Forests to Water Stress .” 2013. Doctoral Dissertation, University of Arizona. Accessed December 15, 2019. http://hdl.handle.net/10150/293566.

MLA Handbook (7^th Edition):

Christoffersen, Bradley. “The Ecohydrological Mechanisms of Resilience and Vulnerability of Amazonian Tropical Forests to Water Stress .” 2013. Web. 15 Dec 2019.

Vancouver:

Christoffersen B. The Ecohydrological Mechanisms of Resilience and Vulnerability of Amazonian Tropical Forests to Water Stress . [Internet] [Doctoral dissertation]. University of Arizona; 2013. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/10150/293566.

Council of Science Editors:

Christoffersen B. The Ecohydrological Mechanisms of Resilience and Vulnerability of Amazonian Tropical Forests to Water Stress . [Doctoral Dissertation]. University of Arizona; 2013. Available from: http://hdl.handle.net/10150/293566

Université Montpellier II

26. Oliveros Ramos, David Ricardo. Modélisation "end-to-end" pour une approche écosystémique des pêches dans le Nord courant de Humboldt : End-to-end modelling for an Ecosystem Approach to Fisheries in the Humboldt Current Ecosystem.

Degree: Docteur es, Evolution, écologie, ressources génétiques, paléontologie, 2014, Université Montpellier II

URL: http://www.theses.fr/2014MON20220

► Ce travail représente une contribution originale à la méthodologie pour le développement de modèles écosystémiques ainsi qu'une première tentative d'une modélisation end-to-end (E2E) de l'écosystème… (more)

▼ Ce travail représente une contribution originale à la méthodologie pour le développement de modèles écosystémiques ainsi qu'une première tentative d'une modélisation end-to-end (E2E) de l'écosystème du Courant de Humboldt Nord (ECHN). L'objectif principal du modèle développé dans cette thèse est de construire un outil de gestion écosystémique et d'aide à la décision; raison pour laquelle la crédibilité du modèle est essentielle, laquelle peut-être établie par confrontation aux données. En outre, le ECHN présente une grande variabilité climatique et océanographique à différentes échelles, la source principale de variation inter-annuelle étant l'interruption du cycle d'upwelling saisonnier par l'Oscillation Australe du phénomène El Niño qui a un effet direct sur la survie larvaire et le succès de recrutement des poissons. La pêche peut aussi être fortement variable, en fonction de l'abondance et de l'accessibilité des principales ressources halieutiques. Ce contexte amène deux questions méthodologiques principales que nous explorons dans cette thèse à travers le développement d'un modèle E2E qui couple le modèle OSMOSE, pour la partie haut niveau trophique, au modèle ROMS-PISCES, pour les parties hydrodynamique et biogéochimie:(i) Comment calibrer un modèle écosystémique à partir de séries temporelles de données? (ii) Comment inclure l'impact de la variabilité inter-annuelle de l'environnement et de la pêche? En premier lieu, cette thèse met en évidence plusieurs problèmes liés à la confrontation de modèles écosystémiques complexes aux données et propose une méthodologie pour une calibration séquentielle en plusieurs phases des modèles écosystémiques. Nous proposons deux critères pour classer les paramètres d'un modèle: la dépendance au modèle et la variabilité temporelle des paramètres. A partir de ces critères, et en tenant compte de l'existence d'estimations initiales, on énonce des règles qui permettent de déterminer quels paramètres doivent être estimés, et dans quel ordre, dans le processus de calibration séquentiel. De plus, un nouvel Algorithme Évolutionnaire, conçu pour la calibration de modèles stochastiques et optimisé pour l'estimation du maximum de vraisemblance, a été développé et utilisé pour la calibration du modèle OSMOSE avec des séries temporelles de données.La variabilité environnementale est explicite dans le modèle: le modèle ROMS-PISCES force le modèle OSMOSE et propage les effets bottom-up potentiels dans le réseau trophique à travers les interactions trophiques entre plancton et poisson d'une part, et les changements dans la distribution spatiale du poisson d'autre part. Cette dynamique spatiale des poissons est prise en compte par l'utilisation de modèles de distribution des espèces de type présence/absence, qui sont en général évalués grâce à une matrice de confusion et les indicateurs statistiques qui lui sont associés. Toutefois, quand on considère la prédiction d'un habitat au cours du temps, la variabilité de la distribution spatiale des habitats peut être résumée de manière… Advisors/Committee Members: Shin, Yunne (thesis director), Arnaud, Bertrand (thesis director).

Subjects/Keywords: Modélisation écologique; Modèles de bout-À-Bout; Approche écosystémique; Pêcherie; Ecological modeling; End-To-End models; Ecosystem approach; Fisheries

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oliveros Ramos, D. R. (2014). Modélisation "end-to-end" pour une approche écosystémique des pêches dans le Nord courant de Humboldt : End-to-end modelling for an Ecosystem Approach to Fisheries in the Humboldt Current Ecosystem. (Doctoral Dissertation). Université Montpellier II. Retrieved from http://www.theses.fr/2014MON20220

Chicago Manual of Style (16^th Edition):

Oliveros Ramos, David Ricardo. “Modélisation "end-to-end" pour une approche écosystémique des pêches dans le Nord courant de Humboldt : End-to-end modelling for an Ecosystem Approach to Fisheries in the Humboldt Current Ecosystem.” 2014. Doctoral Dissertation, Université Montpellier II. Accessed December 15, 2019. http://www.theses.fr/2014MON20220.

MLA Handbook (7^th Edition):

Oliveros Ramos, David Ricardo. “Modélisation "end-to-end" pour une approche écosystémique des pêches dans le Nord courant de Humboldt : End-to-end modelling for an Ecosystem Approach to Fisheries in the Humboldt Current Ecosystem.” 2014. Web. 15 Dec 2019.

Vancouver:

Oliveros Ramos DR. Modélisation "end-to-end" pour une approche écosystémique des pêches dans le Nord courant de Humboldt : End-to-end modelling for an Ecosystem Approach to Fisheries in the Humboldt Current Ecosystem. [Internet] [Doctoral dissertation]. Université Montpellier II; 2014. [cited 2019 Dec 15]. Available from: http://www.theses.fr/2014MON20220.

Council of Science Editors:

Oliveros Ramos DR. Modélisation "end-to-end" pour une approche écosystémique des pêches dans le Nord courant de Humboldt : End-to-end modelling for an Ecosystem Approach to Fisheries in the Humboldt Current Ecosystem. [Doctoral Dissertation]. Université Montpellier II; 2014. Available from: http://www.theses.fr/2014MON20220

Colorado State University

27. Christensen, Megan. Diversifying ranch business models : challenges and opportunities in Larimer County, Colorado.

Degree: MS(M.S.), Human Dimensions of Natural Resources, 2007, Colorado State University

URL: http://hdl.handle.net/10217/49867

► Private, working ranches provide valuable "ecosystem services," the benefits people derive from ecosystems including food, water, open space, carbon sequestration, recreational opportunities, and many more.… (more)

▼ Private, working ranches provide valuable "ecosystem services," the benefits people derive from ecosystems including food, water, open space, carbon sequestration, recreational opportunities, and many more. While ranchers are compensated for services such as food and other livestock products, they are generally not compensated for other public benefits derived from their land stewardship. Development pressure compounded by low profit margins in the livestock industry make ranching an economically difficult undertaking, and conversion of working ranches to other land uses is a well-established trend across the western US. New income sources are being explored to create more diversified ranch business models in order to deliver financial benefits to ranchers and conservation benefits to the public. The objective of this study was to investigate the barriers and opportunities for developing more diversified business models for working ranches that integrate traditional livestock income sources with additional conservation-oriented sources. As part of this investigation, we examined the potential role of payments for ecosystem services (PES), a major new market-based tool for conservation in working landscapes. We investigated this topic through a detailed case study of ranchers and natural resource practitioners in Larimer County, Colorado - a region with a long tradition of ranching that continues today amidst escalating pressures that threaten the viability of ranching and conservation values in the region. Using a qualitative semi-structured interview approach, we interviewed 18 ranchers (comprising 16 ranch operations) and 7 natural resource practitioners who work closely with ranchers in the study region. We concentrated on topics including current ranch business models and practices, challenges ranches are facing, and barriers and opportunities for more diversified future ranch business models, including a particular focus on PES. Participants identified 58 current challenges, 70 concerns for the future, and 85 opportunities for diversification in the future. Costs of inputs, unprofitability, development pressure, time and energy, and water scarcity were mentioned most often within the wide range of challenges. Invasion of privacy, traditional thinking or fear of change, and regulations emerged as concerns important to participants. Future business opportunities were divided into three main categories: (1) reducing costs (e.g. tax credits), (2) enhancing revenue (e.g. carbon credits) and (3) building regional capacity (e.g. capitalizing on the increasingly collaborative ranch culture). After discussion regarding a hypothetical PES program, all participants were at least potentially interested in a new payment program. This interest was tempered, however with caution and questions about how such a program would be structured. Any new program developed would need to provide complete, transparent information regarding costs, benefits, rules, and requirements. This research contributes to diverse efforts at local… Advisors/Committee Members: Goldstein, Joshua (advisor), Fernandez-Gimenez, Maria (committee member), Reid, Robin (committee member).

Subjects/Keywords: business models; Western United States; ranching; ecosystem services

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Christensen, M. (2007). Diversifying ranch business models : challenges and opportunities in Larimer County, Colorado. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/49867

Chicago Manual of Style (16^th Edition):

Christensen, Megan. “Diversifying ranch business models : challenges and opportunities in Larimer County, Colorado.” 2007. Masters Thesis, Colorado State University. Accessed December 15, 2019. http://hdl.handle.net/10217/49867.

MLA Handbook (7^th Edition):

Christensen, Megan. “Diversifying ranch business models : challenges and opportunities in Larimer County, Colorado.” 2007. Web. 15 Dec 2019.

Vancouver:

Christensen M. Diversifying ranch business models : challenges and opportunities in Larimer County, Colorado. [Internet] [Masters thesis]. Colorado State University; 2007. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/10217/49867.

Council of Science Editors:

Christensen M. Diversifying ranch business models : challenges and opportunities in Larimer County, Colorado. [Masters Thesis]. Colorado State University; 2007. Available from: http://hdl.handle.net/10217/49867

28. Pennino, Maria Grazia. Implementing ecosystem approach to fishery management: advances and new tools.

Degree: 2018, TDX

URL: http://hdl.handle.net/10803/568336

► Since ancient times, fishing has been a major source of food for humanity and a provider of employment and economic benefits to those engaged in… (more)

▼ Since ancient times, fishing has been a major source of food for humanity and a provider of employment and economic benefits to those engaged in this activity. However, with increased knowledge and the dynamic development of fisheries it was realized that aquatic resources, although renewable, were not infinite and needed to be properly managed if their contribution to the nutritional, economic and social well-being of the growing world's population was to be sustained. In recent years, world fisheries have become a dynamically developing sector of the food industry, and coastal states have striven to take advantage of their new opportunities by investing in modern fishing fleets and processing factories in response to growing international demand for fish and fishery products. It became clear, however, that many fishery resources could not sustain an often uncontrolled increase in exploitation. Concerns have been expressed about the contribution of fisheries to sustainable development and about overfishing, excess catching capacity, the depletion of some stocks, human-induced changes in ecosystems, as well as the increase and globalization of the fish trade with its potential impact on local supplies and equity. In order to address these problems, the United Nations Food and Agriculture Organization (FAO) has called for the application of an Ecosystem Approach to Fisheries Management (EAFM), which aims to achieve a sustainable exploitation of commercial fisheries, providing specific consideration of the interactions between fishing gears and marine ecosystems. EAFM takes into account that fisheries are embedded into the environment and cannot be managed in isolation. It has to be considered as the application of sustainable development principles to the fishing sector, combining ecological sustainability, economic viability and social fairness. Nevertheless, while it is widely recognized that fishing is important to sustainable development and that its contribution could be improved, the amount of objective scientific information about fishing is limited and what exists is difficult to access. The reliability of scientific advice for the management of natural resources is highly dependent on the quantity and quality of data that are available for scientific assessment and interpretation. Although large amounts of certain types of data about marine ecosystems are readily available, as in the case of satellite-derived remote sensing data or observations based on automatic telemetry, it is far more common to have to deal with limited and irregularly spaced data (e.g. on fish and other marine fauna), and the data may not always be strictly comparable due to variations in environmental conditions between sampling periods. The main reason is that in fishery research the collection of data is both time-consuming and expensive. Data are difficult to obtain, and the problems increase when the goal of the research is to study long time series on a macro-scale, with the purpose of examining changes in the dynamics of a… Advisors/Committee Members: Bellido Millán, José María, Conesa Guillén, David, López Quílez, Antonio, Departament d'Estadística i Investigació Operativa.

Subjects/Keywords: species distribution models; ecosystem approach to fishery management; bayesian spatial models; UNESCO::MATEMÁTICAS::Estadística::Técnicas de predicción estadística; UNESCO::CIENCIAS DE LA TIERRA Y DEL ESPACIO::Oceanografía::Zoología marina

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pennino, M. G. (2018). Implementing ecosystem approach to fishery management: advances and new tools. (Thesis). TDX. Retrieved from http://hdl.handle.net/10803/568336

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pennino, Maria Grazia. “Implementing ecosystem approach to fishery management: advances and new tools.” 2018. Thesis, TDX. Accessed December 15, 2019. http://hdl.handle.net/10803/568336.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pennino, Maria Grazia. “Implementing ecosystem approach to fishery management: advances and new tools.” 2018. Web. 15 Dec 2019.

Vancouver:

Pennino MG. Implementing ecosystem approach to fishery management: advances and new tools. [Internet] [Thesis]. TDX; 2018. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/10803/568336.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pennino MG. Implementing ecosystem approach to fishery management: advances and new tools. [Thesis]. TDX; 2018. Available from: http://hdl.handle.net/10803/568336

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Washington

29. Kovenock, Marlies. Ecosystem and Large-Scale Climate Impacts of Plant Leaf Dynamics.

Degree: PhD, 2019, University of Washington

URL: http://hdl.handle.net/1773/44061

► Vegetation modifies Earth's climate by controlling the fluxes of energy, carbon, and water. Of critical importance is a better understanding of how vegetation responses to… (more)

▼ Vegetation modifies Earth's climate by controlling the fluxes of energy, carbon, and water. Of critical importance is a better understanding of how vegetation responses to climate change will feedback on climate. Observations show that plant leaf traits respond to elevated carbon dioxide concentrations. These leaf trait responses have the potential to modify plant functioning and competitive dynamics, and could therefore alter carbon cycling and surface energy fluxes with implications for regional and global climate. Yet the climate impacts of changes in leaf structural traits − such as increases in leaf mass per area and leaf carbon to nitrogen ratio − in response to elevated carbon dioxide are not included in most climate projections and remain to be tested and quantified. Here we show that one leaf trait response to elevated carbon dioxide − a one-third increase in leaf mass per area − significantly impacts climate and carbon cycling in Earth system model simulations. Higher leaf mass per area enhances warming in response to elevated carbon dioxide by reducing the increase in leaf area, which lowers carbon uptake and evapotranspirative cooling by plants and leads to enhanced solar radiation absorbed at the Earth's surface. Our results suggest that leaf trait responses to carbon dioxide should be considered in climate projections and provide additional motivation for ecological and physiological experiments that improve our mechanistic understanding of plant responses to environment. Tropical forests exert extensive control over global energy, carbon, and water fluxes and thus play a critical role in determining future climate. Using an ensemble of demographic vegetation model simulations we quantify the influence of two leaf trait responses to elevated carbon dioxide − increases in leaf mass per area and leaf carbon to nitrogen ratio − on tropical forest functioning and competitive dynamics. We find that consideration of these leaf trait responses reduces projected carbon uptake and evapotranspirative cooling when plant type abundance is held invariant with time. However, given that more competitively advantageous leaf trait responses also maintain higher levels of plant productivity and evapotranspiration, including changes in plant type abundance may mitigate these decreases in ecosystem functioning. Models that explicitly represent competition between plants and leaf responses to elevated carbon dioxide are needed to capture these influences on tropical forest functioning and large-scale climate. Lastly, we improve the simulation of present-day tropical forest functioning and structure in a demographic vegetation model by including a gradient of leaf mass per area with canopy depth, following observations. By benchmarking the modified model's performance against observations at a tropical forest test site across nearly 300 plausible plant trait parameterizations, we identify high-performing parameter sets and areas for further model development. Advisors/Committee Members: Swann, Abigail LS (advisor).

Subjects/Keywords: climate change; Earth system models; ecosystem models; elevated carbon dioxide; leaf trait plasticity; vegetation-climate interactions; Biology; Atmospheric sciences; Environmental science; Biology

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kovenock, M. (2019). Ecosystem and Large-Scale Climate Impacts of Plant Leaf Dynamics. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/44061

Chicago Manual of Style (16^th Edition):

Kovenock, Marlies. “Ecosystem and Large-Scale Climate Impacts of Plant Leaf Dynamics.” 2019. Doctoral Dissertation, University of Washington. Accessed December 15, 2019. http://hdl.handle.net/1773/44061.

MLA Handbook (7^th Edition):

Kovenock, Marlies. “Ecosystem and Large-Scale Climate Impacts of Plant Leaf Dynamics.” 2019. Web. 15 Dec 2019.

Vancouver:

Kovenock M. Ecosystem and Large-Scale Climate Impacts of Plant Leaf Dynamics. [Internet] [Doctoral dissertation]. University of Washington; 2019. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/1773/44061.

Council of Science Editors:

Kovenock M. Ecosystem and Large-Scale Climate Impacts of Plant Leaf Dynamics. [Doctoral Dissertation]. University of Washington; 2019. Available from: http://hdl.handle.net/1773/44061

Dalhousie University

30. Ferretti, Francesco. THE ROLE OF SHARKS IN MARINE ECOSYSTEMS: EVALUATING OVEREXPLOITED MARINE FISH COMMUNITIES TO DETECT LONG-TERM EFFECTS OF PREDATOR REMOVAL.

Degree: PhD, Department of Biology, 2010, Dalhousie University

URL: http://hdl.handle.net/10222/13171

► Elasmobranchs are among the oldest and most successful predators in the ocean, yet one of the most vulnerable to the direct and indirect effects of… (more)

▼ Elasmobranchs are among the oldest and most successful predators in the ocean, yet one of the most vulnerable to the direct and indirect effects of fishing. Many populations are rapidly declining around the world, and an increasing number is listed as threatened or endangered. The broader ecosystem consequences of these declines, and whether other marine predators can replace sharks, are open questions. In this thesis, I used a diverse set of data and modeling techniques to analyze long-term changes in elasmobranch populations in the Mediterranean Sea, and the consequences of shark declines on marine ecosystems. Because of its long history of fishing, the Mediterranean offers a unique perspective on the response of marine communities to exploitation over long time scales. Here, I reconstructed the history of elasmobranch exploitation over the past 200 years in pelagic, coastal and demersal communities. Results were combined meta-analytically to derive a general pattern of change for the entire region. Overall, I detected multiple cases of regional species extirpations, a strong correlation between historical intensity of exploitation and the stage of community degradation, and some cases of compensatory species increases. My results suggest that compared to other marine ecosystems worldwide, the Mediterranean Sea might be in an advanced stage of overexploitation. To gain more general conclusions about the patterns and consequences of shark declines in the ocean, I reviewed and reanalyzed documented changes in exploited elasmobranch communities around the world, and synthesized the effects of sharks on their prey and wider communities. This work revealed that sharks are abundant and diverse in little exploited or unexploited marine ecosystems but vulnerable to even light levels of fishing. The decline in large sharks has reduced natural mortality in a range of their prey, contributing to changes in abundance, distribution, and behaviour of marine megafauna that have few other predators. In some cases, this has resulted in cascading changes in prey populations and food-web structure. Overall, my thesis greatly enhanced our knowledge about the critical state of elasmobranchs in the Mediterranean Sea and the consequences of the declines of these important marine predators on marine ecosystems. Advisors/Committee Members: Jeremy Collie (external-examiner), Hal Whitehead (graduate-coordinator), Boris Worm (thesis-reader), Edward Susko (thesis-reader), Heike K. Lotze and Andrew A. Rosenberg (thesis-supervisor), Not Applicable (ethics-approval), Yes (manuscripts), Yes (copyright-release).

Subjects/Keywords: Elasmobranchs; extinction risk; generalized linear models; historical population trends; meta-analysis; overfishing; predators; top-down control; ecological role; ecosystem; fishing; mesopredator release; predation; risk effects; trophic cascades; sharks; trawl surveys

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ferretti, F. (2010). THE ROLE OF SHARKS IN MARINE ECOSYSTEMS: EVALUATING OVEREXPLOITED MARINE FISH COMMUNITIES TO DETECT LONG-TERM EFFECTS OF PREDATOR REMOVAL. (Doctoral Dissertation). Dalhousie University. Retrieved from http://hdl.handle.net/10222/13171

Chicago Manual of Style (16^th Edition):

Ferretti, Francesco. “THE ROLE OF SHARKS IN MARINE ECOSYSTEMS: EVALUATING OVEREXPLOITED MARINE FISH COMMUNITIES TO DETECT LONG-TERM EFFECTS OF PREDATOR REMOVAL.” 2010. Doctoral Dissertation, Dalhousie University. Accessed December 15, 2019. http://hdl.handle.net/10222/13171.

MLA Handbook (7^th Edition):

Ferretti, Francesco. “THE ROLE OF SHARKS IN MARINE ECOSYSTEMS: EVALUATING OVEREXPLOITED MARINE FISH COMMUNITIES TO DETECT LONG-TERM EFFECTS OF PREDATOR REMOVAL.” 2010. Web. 15 Dec 2019.

Vancouver:

Ferretti F. THE ROLE OF SHARKS IN MARINE ECOSYSTEMS: EVALUATING OVEREXPLOITED MARINE FISH COMMUNITIES TO DETECT LONG-TERM EFFECTS OF PREDATOR REMOVAL. [Internet] [Doctoral dissertation]. Dalhousie University; 2010. [cited 2019 Dec 15]. Available from: http://hdl.handle.net/10222/13171.

Council of Science Editors:

Ferretti F. THE ROLE OF SHARKS IN MARINE ECOSYSTEMS: EVALUATING OVEREXPLOITED MARINE FISH COMMUNITIES TO DETECT LONG-TERM EFFECTS OF PREDATOR REMOVAL. [Doctoral Dissertation]. Dalhousie University; 2010. Available from: http://hdl.handle.net/10222/13171

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations