+publisher:"University of Illinois – Chicago" +contributor:("Gonzalez-Meler, Miquel")

University of Illinois – Chicago

1. Dalton, Jennifer Elizabeth. Arctic Ground Squirrels as Ecosystem Engineers of Projected Tundra Shrub Encroachment.

Degree: 2017, University of Illinois – Chicago

► Holarctic warming temperatures are leading to an expansive and rapid greening of the Arctic. Yet herbivores may play a role in mediating shrub expansion. The… (more)

Subjects/Keywords: Ecosystem; climate change; tundra; foraging; remote sensing

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APA (6^th Edition):

Dalton, J. E. (2017). Arctic Ground Squirrels as Ecosystem Engineers of Projected Tundra Shrub Encroachment. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/22172

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):

Dalton, Jennifer Elizabeth. “Arctic Ground Squirrels as Ecosystem Engineers of Projected Tundra Shrub Encroachment.” 2017. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/22172.

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

MLA Handbook (7^th Edition):

Dalton, Jennifer Elizabeth. “Arctic Ground Squirrels as Ecosystem Engineers of Projected Tundra Shrub Encroachment.” 2017. Web. 07 Mar 2021.

Vancouver:

Dalton JE. Arctic Ground Squirrels as Ecosystem Engineers of Projected Tundra Shrub Encroachment. [Internet] [Thesis]. University of Illinois – Chicago; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/22172.

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

Council of Science Editors:

Dalton JE. Arctic Ground Squirrels as Ecosystem Engineers of Projected Tundra Shrub Encroachment. [Thesis]. University of Illinois – Chicago; 2017. Available from: http://hdl.handle.net/10027/22172

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

University of Illinois – Chicago

2. Beutler, Joseph M. Hydrological and Geochemical Characterization of a Restored Wetland in Central Illinois.

Degree: 2012, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/9588

► This research employed multiple isotopic and geochemical tracers to build on previous studies of a restored wetland at Hennepin and Hopper Lake in central Illinois.… (more)

Subjects/Keywords: wetland; isotope; hydrology

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APA (6^th Edition):

Beutler, J. M. (2012). Hydrological and Geochemical Characterization of a Restored Wetland in Central Illinois. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/9588

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):

Beutler, Joseph M. “Hydrological and Geochemical Characterization of a Restored Wetland in Central Illinois.” 2012. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/9588.

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

MLA Handbook (7^th Edition):

Beutler, Joseph M. “Hydrological and Geochemical Characterization of a Restored Wetland in Central Illinois.” 2012. Web. 07 Mar 2021.

Vancouver:

Beutler JM. Hydrological and Geochemical Characterization of a Restored Wetland in Central Illinois. [Internet] [Thesis]. University of Illinois – Chicago; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/9588.

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

Council of Science Editors:

Beutler JM. Hydrological and Geochemical Characterization of a Restored Wetland in Central Illinois. [Thesis]. University of Illinois – Chicago; 2012. Available from: http://hdl.handle.net/10027/9588

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

University of Illinois – Chicago

3. Blanc Betes, Maria Elena. Impacts of Changes in Winter Precipitation on C Stocks and Fluxes in Arctic Tussock Tundra.

Degree: 2017, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/21809

► The alteration of winter precipitation patterns in Arctic regions represents a potentially important climate forcing agent. However, climate/carbon (C) cycle forcing feedbacks from Arctic regions… (more)

▼ The alteration of winter precipitation patterns in Arctic regions represents a potentially important climate forcing agent. However, climate/carbon (C) cycle forcing feedbacks from Arctic regions remain largely unresolved due to uncertainties in the strength, form (CO2 and CH4), direction and timing of ecosystem C fluxes under future precipitation scenarios. I combined C flux measurements and soil organic carbon (SOC) inventories with stable isotope and radioisotope methods in a multi-year, multi-level snow manipulation experiment in Arctic tundra to investigate: i) the rate at which permafrost C will become available for decomposition and will be released relative to ecosystem C inputs under future precipitation scenarios, ii) the magnitude, form and direction of derived climate/C-cycle feedbacks, and iii) the mechanisms driving long-term impacts of changes in winter precipitation on Arctic tundra C budget and fluxes. Results indicated the potential of Arctic tundra to become a transient C source through accelerated soil organic carbon (SOC) mineralization rates under future precipitation scenarios, but also to act as an additional long-term C sink with persistent increases in winter precipitation, as recently thawed SOC may remain largely immobilized over decades under thaw-induced near-water saturated conditions. This additional C sink however, may come at the cost of a substantial positive feedback on climate derived from increases in the net CH4 source strength of Arctic tundra, as warmer and wetter active layer stimulate CH4 production above CH4 oxidation further subsidized by enhanced plant-mediated transport associated to transitions in supported vegetation over the course of progressive permafrost degradation. Results suggested that much of current divergence among model predicted Arctic climate/C-cycle feedbacks may stem from inaccurate representations of the sensitivity of both physical and biological processes to changes in winter precipitation over time. Findings presented here indicate that projected precipitation scenarios will drive the Arctic tundra C budget and shape the radiative forcing from Arctic regions, critically affecting future climate. Advisors/Committee Members: Meler%2C%20Miquel%20A%22%29&pagesize-30">Gonzalez-Meler, Miquel A (advisor), Welker, Jeffrey M (committee member), Sturchio, Neil C (committee member), Bogner, Jean E (committee member), Minor, Emily S (committee member), Meler%2C%20Miquel%20A%22%29&pagesize-30">Gonzalez-Meler, Miquel A (chair).

Subjects/Keywords: Arctic; Tundra; Permafrost; Winter precipitation; Snow accumulation; Climate change; Soil organic carbon; Carbon fluxes; Methane; Methanotrophy; Methanogenesis; Plant-mediated transport; Carbon dioxide; Gross primary productivity; Net ecosystem exchange; Heterotrophic respiration; Global warming potential; Carbon isotopes; Radioisotopes

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

APA (6^th Edition):

Blanc Betes, M. E. (2017). Impacts of Changes in Winter Precipitation on C Stocks and Fluxes in Arctic Tussock Tundra. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/21809

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):

Blanc Betes, Maria Elena. “Impacts of Changes in Winter Precipitation on C Stocks and Fluxes in Arctic Tussock Tundra.” 2017. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/21809.

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

MLA Handbook (7^th Edition):

Blanc Betes, Maria Elena. “Impacts of Changes in Winter Precipitation on C Stocks and Fluxes in Arctic Tussock Tundra.” 2017. Web. 07 Mar 2021.

Vancouver:

Blanc Betes ME. Impacts of Changes in Winter Precipitation on C Stocks and Fluxes in Arctic Tussock Tundra. [Internet] [Thesis]. University of Illinois – Chicago; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/21809.

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

Council of Science Editors:

Blanc Betes ME. Impacts of Changes in Winter Precipitation on C Stocks and Fluxes in Arctic Tussock Tundra. [Thesis]. University of Illinois – Chicago; 2017. Available from: http://hdl.handle.net/10027/21809

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

University of Illinois – Chicago

4. Drewniak, Beth A. Improvements to Simulating the Carbon Cycle in Land Surface Models.

Degree: 2019, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/23628

► Earth System Models (ESMs) are the tools we use to experiment on the Earth, understand processes that drive climate, explore climate response to forcing, and… (more)

▼ Earth System Models (ESMs) are the tools we use to experiment on the Earth, understand processes that drive climate, explore climate response to forcing, and project future climate. In order to use ESMs more effectively, we must identify the important components of biological systems that drive productivity and soil carbon storage that models currently lack. My research focuses on improving elements related to the land component of those models, or Land Surface Models (LSMs). By way of an introduction, I will begin with a review of some observed processes that models may have difficulty with: the non-additive effects of co-occurring stressors. I will discuss the effects of nitrogen deposition and drought on vegetation as they relate to productivity, particularly focusing on carbon uptake and partitioning. I will then highlight several areas of model development that may help the model capture vegetation response to increasing nitrogen deposition and drought. I applied two of those suggestions in the Energy Exascale Earth System Land Model (E3SM): dynamic roots and dynamic allocation. I integrated a dynamic root function in the E3SM Land Model (ELM) such that the vertical distribution of fine roots can respond to the water and nitrogen needs of the plant. Next, I addressed allocation partitioning by adding an economic-type production function to ELM to maximize NPP by distributing biomass between leaves and stems for optimum carbon and nitrogen uptake. Finally, I evaluate the impact of humans in another LSM, the Community Land Model, by investigating the impacts of management practices of cultivation on soil carbon stocks. Although broad ranging, each model development piece contributes to a model’s ability to simulate the carbon cycle. Furthermore, each development suggests additional model focus areas that can further improve the model. Advisors/Committee Members: Meler%2C%20Miquel%20A%22%29&pagesize-30">Gonzalez-Meler, Miquel A (advisor), Brown, Joel (committee member), Berkelhammer, Max (committee member), Bogner, Jean (committee member), Snyder, Peter K (committee member), Kotamarthi, V. Rao (committee member), Meler%2C%20Miquel%20A%22%29&pagesize-30">Gonzalez-Meler, Miquel A (chair).

Subjects/Keywords: Earth System Models; Carbon Cycle; Roots; Agriculture; Allocation

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

APA (6^th Edition):

Drewniak, B. A. (2019). Improvements to Simulating the Carbon Cycle in Land Surface Models. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/23628

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):

Drewniak, Beth A. “Improvements to Simulating the Carbon Cycle in Land Surface Models.” 2019. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/23628.

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

MLA Handbook (7^th Edition):

Drewniak, Beth A. “Improvements to Simulating the Carbon Cycle in Land Surface Models.” 2019. Web. 07 Mar 2021.

Vancouver:

Drewniak BA. Improvements to Simulating the Carbon Cycle in Land Surface Models. [Internet] [Thesis]. University of Illinois – Chicago; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/23628.

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

Council of Science Editors:

Drewniak BA. Improvements to Simulating the Carbon Cycle in Land Surface Models. [Thesis]. University of Illinois – Chicago; 2019. Available from: http://hdl.handle.net/10027/23628

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

University of Illinois – Chicago

5. Lynch, Douglas J. Impacts of Fine-roots on Terrestrial Net Primary Productivity and Soil Nutrient Cycling.

Degree: 2015, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/19585

► Large uncertainties remain in fine-root longevity, and contribution to terrestrial nutrient cyling. In my dissertation, I utilized a carbon isotope tracer at a long-term Free-Air… (more)

▼ Large uncertainties remain in fine-root longevity, and contribution to terrestrial nutrient cyling. In my dissertation, I utilized a carbon isotope tracer at a long-term Free-Air CO2 Enrichment (FACE) experiment in a Liquidambar styraciflua plantation to examine properties of fine-roots including longevity and sources of carbon for growth and respiration. Soil cores were sequentially sampled for multiple growing seasons following cessation of CO2 fumigation. Fine-roots were extracted from soil and separated by diameter. Newly produced roots were produced from exclusively new photosynthate. Fine-root carbon was replaced more slowly, with about half of the carbon remaining after two full growing seasons. Model fitting found at least two turnover rates for carbon occur in the fine-root population, with 10% of carbon quickly being turned over (< 3 months) and 90% turning over more slowly (> 2 years). In a follow-up study, I utilized a potentially more functional approach by separating roots by root branching order. Results indicate that branching order and root nitrogen concentration correlate with root longevity. Thus, easily measurable traits such as nitrogen concentration may help elucidate root longevity in different species or at larger spatial scales. Knowledge of the longevity and standing biomass of fine-roots is essential for quantifying fine-root contribution to terrestrial NPP and forest nutrient cycling. An extensive literature review was conducted to examine fine-root biomass within branching orders, with just 10 reports in the literature. Even with this sparse data-set, it is clear that environmental conditions such as nutrient and water availability impact fine-root biomass distribution. Increased studies quantifying the amount of biomass in roots by branching order will be needed to fully calculate fine-root contribution to terrestrial carbon and nutrient cycling. A final contribution from my thesis is the creation of a dynamic vegetation model that optimizes both above- and below-ground biomass allocation with respect to changing environmental conditions. Results from empirical research, including that done in my other chapters, conclude that biomass allocation is plastic with respect to abiotic conditions. No current simple modeling scheme adequately captures this plasticity. It is hoped that the model developed here can make progress towards that goal. Advisors/Committee Members: Meler%2C%20Miquel%20A.%22%29&pagesize-30">Gonzalez-Meler, Miquel A. (advisor), Minor, Emily (committee member), BassiriRad, Hormoz (committee member), Fahey, Robert (committee member), Matamala, Roser (committee member).

Subjects/Keywords: fine roots; free-air CO2 enrichment (FACE); post-carboxylation fractionation; root respiration; root turnover; Liquidambar styraciflua; root branching order

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

APA (6^th Edition):

Lynch, D. J. (2015). Impacts of Fine-roots on Terrestrial Net Primary Productivity and Soil Nutrient Cycling. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/19585

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):

Lynch, Douglas J. “Impacts of Fine-roots on Terrestrial Net Primary Productivity and Soil Nutrient Cycling.” 2015. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/19585.

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

MLA Handbook (7^th Edition):

Lynch, Douglas J. “Impacts of Fine-roots on Terrestrial Net Primary Productivity and Soil Nutrient Cycling.” 2015. Web. 07 Mar 2021.

Vancouver:

Lynch DJ. Impacts of Fine-roots on Terrestrial Net Primary Productivity and Soil Nutrient Cycling. [Internet] [Thesis]. University of Illinois – Chicago; 2015. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/19585.

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

Council of Science Editors:

Lynch DJ. Impacts of Fine-roots on Terrestrial Net Primary Productivity and Soil Nutrient Cycling. [Thesis]. University of Illinois – Chicago; 2015. Available from: http://hdl.handle.net/10027/19585

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

University of Illinois – Chicago

6. Mores, Robin M. Beyond the Binary Web: Using Real-Time PCR to Quantify the Structure of a Spider-Dominated Food Web.

Degree: 2016, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/20939

► Historically, food webs have been depicted as networks of binary interactions that show qualitative structure. Incorporating “weighted” data details interaction strengths and addresses a critique… (more)

▼ Historically, food webs have been depicted as networks of binary interactions that show qualitative structure. Incorporating “weighted” data details interaction strengths and addresses a critique in food-web theory – that binary webs are too simple. Additional simplifications of published food webs include the aggregation of data across years/seasons and the aggregation of taxa into “functional groups”. This dissertation applies a molecular technique to the investigation of a food web to address the questions: 1) Is food web structure consistent across years and seasons? 2) How does foraging mode affect feeding interactions? 3) Are patterns of intra-guild predation (IGP) similar to interactions between predators and non-IGP prey? 4) Does examining interactions at a finer taxonomic resolution reveal divergent patterns in food-web structure? Real-time PCR was employed to examine predation within a model, spider-dominated food web. Eleven spider families were examined for the gut-content DNA of eleven potential prey. Food-web structure was analyzed using connectance, compartmentalization, weighted connectance, interaction evenness and whole-web specialization. The foraging mode of predators compared web-building to cursorial spiders and examined specialization. The examination of IGP compared the structure of IGP food webs to the structure of non-IGP webs. Examining interaction frequencies at a finer taxonomic resolution compared feeding patterns of families to those of genera with each family. Results showed the structure of the model food web was consistent across years but not seasons. Spiders displayed differences according to foraging mode - cursorial spiders showed wider diet breadth compared to web-builders. There were specialization differences between taxa, but this did not relate to foraging. Strong differences were seen seasonally when IGP interactions were compared to non-IGP interactions. Examining interaction frequencies at a finer taxonomic resolution revealed feeding patterns distinctly different from aggregating data to the family level. This dissertation demonstrates the importance of quantitative metrics in the examination of food-web structure. Temporal aggregation is sometimes sufficient to describe the structure of a food web, but this is not necessarily true for finer degrees of resolution. Finally, this research establishes that the aggregation of taxa, even at the family level, does not adequately describe food-web structure. Advisors/Committee Members: Wise, David H. (advisor), Minor, Emily (committee member), Meler%2C%20Miquel%22%29&pagesize-30">Gonzalez-Meler, Miquel (committee member), Sierwald, Petra (committee member), Harwood, James (committee member).

Subjects/Keywords: food web; real-time PCR; spiders; predation; forest floor; arthropod community

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APA (6^th Edition):

Mores, R. M. (2016). Beyond the Binary Web: Using Real-Time PCR to Quantify the Structure of a Spider-Dominated Food Web. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/20939

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):

Mores, Robin M. “Beyond the Binary Web: Using Real-Time PCR to Quantify the Structure of a Spider-Dominated Food Web.” 2016. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/20939.

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

MLA Handbook (7^th Edition):

Mores, Robin M. “Beyond the Binary Web: Using Real-Time PCR to Quantify the Structure of a Spider-Dominated Food Web.” 2016. Web. 07 Mar 2021.

Vancouver:

Mores RM. Beyond the Binary Web: Using Real-Time PCR to Quantify the Structure of a Spider-Dominated Food Web. [Internet] [Thesis]. University of Illinois – Chicago; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/20939.

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

Council of Science Editors:

Mores RM. Beyond the Binary Web: Using Real-Time PCR to Quantify the Structure of a Spider-Dominated Food Web. [Thesis]. University of Illinois – Chicago; 2016. Available from: http://hdl.handle.net/10027/20939

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

University of Illinois – Chicago

7. Bleicher, Sonny S. Divergent Behaviour amid Convergent Evolution: Common Garden Experiments with Desert Rodents and Vipers.

Degree: 2015, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/19398

► Desert ecosystems worldwide provide examples of convergent evolution for species and entire communities. In a series of common-garden experiments, I compare the communities of granivorous… (more)

▼ Desert ecosystems worldwide provide examples of convergent evolution for species and entire communities. In a series of common-garden experiments, I compare the communities of granivorous rodents and their predators from North American and Middle Eastern Deserts. I used populations of two Heteromyid rodents from the Mojave Desert and two Gerbillines from the Negev. Each population’s perception of risk of viper species, one known and one from the convergent system, was measured in three steps: initial (at first encounter), over a two month experiment of co-habitation with predators in a semi-natural arena, and post exposure. The initial and post exposure “interviews” revealed that all four rodent species fear most their native viper species. However, after two months of exposure, all four species exhibit greater fear for the sidewinder rattlesnake (Crotalus cerastes) from the Mojave, a snake capable of infra-red vision, than for the Saharan horned viper (Cerastes cerastes) from the Negev, a snake “blind” on dark nights. In the semi-natural arena (vivarium), all four species exhibited fear (higher giving-up densities in depletable food patches) of snakes and owls. As evidence of predator facilitation, all four rodents respond to owls by favoring the shrub cover and respond to snakes by favoring the open areas. More subtle responses to moonphase, particular viper species, and interactions of owls and snakes were rodent species specific. The evolutionary history with predators proved to be more important in shaping the evolution of anti-predator strategies than environmental forces of climate, substrate and food availability. Heteromyids, who evolved with heat sensing vipers exhibited fixed strategies that fluctuate in intensity based on the overall risk in the environment. The Gerbillines on the other hand reassess the risk based on the greatest threat in the environment. All species however respond to all vipers with the strategies best suited to the vipers they evolved with. Advisors/Committee Members: Brown, Joel S. (advisor), Berger-Wolf, Tanya Y. (committee member), Mateo, Jill M. (committee member), Mitchell, William A. (committee member), Meler%2C%20Miquel%20A.%22%29&pagesize-30">Gonzalez-Meler, Miquel A. (committee member), Kotler, Burt P. (committee member).

Subjects/Keywords: Allenby’s Gerbil (Gerbillus andersoni allebyi); Behavioural Ecology; Barn owl (Tyto alba); Convergent Evolution; Desert Pocket Mouse (Cheatodipus penicillatus); Desert dunes; Evolutionary Ecology; Gerbilline Rodents; Giving Up Densities (GUDs); Greater Egyptian Gerbil (Gerbillus pyramidum); Habitat Selection; Heteromyid Rodents; Landscapes of Fear; Merriam’s Kangaroo Rat (Dipodomys merriami); Optimal Patch Use; Predator-Prey Dynamics; Saharan Horned Viper (Cerastes cerastes); Sidewinder rattlesnake (Crotalus cerastes)

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

APA (6^th Edition):

Bleicher, S. S. (2015). Divergent Behaviour amid Convergent Evolution: Common Garden Experiments with Desert Rodents and Vipers. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/19398

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):

Bleicher, Sonny S. “Divergent Behaviour amid Convergent Evolution: Common Garden Experiments with Desert Rodents and Vipers.” 2015. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/19398.

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

MLA Handbook (7^th Edition):

Bleicher, Sonny S. “Divergent Behaviour amid Convergent Evolution: Common Garden Experiments with Desert Rodents and Vipers.” 2015. Web. 07 Mar 2021.

Vancouver:

Bleicher SS. Divergent Behaviour amid Convergent Evolution: Common Garden Experiments with Desert Rodents and Vipers. [Internet] [Thesis]. University of Illinois – Chicago; 2015. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/19398.

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

Council of Science Editors:

Bleicher SS. Divergent Behaviour amid Convergent Evolution: Common Garden Experiments with Desert Rodents and Vipers. [Thesis]. University of Illinois – Chicago; 2015. Available from: http://hdl.handle.net/10027/19398

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

University of Illinois – Chicago

8. Lin, Jiajia. Seasonal Variations in Nitrate Flux, Transport, and Sources in the Upper Illinois River Basin.

Degree: 2016, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/20250

► Excess N contributes to numerous environmental issues such as eutrophication, hypoxia, and loss of habitat and biodiversity. This study was conducted to study the sources,… (more)

▼ Excess N contributes to numerous environmental issues such as eutrophication, hypoxia, and loss of habitat and biodiversity. This study was conducted to study the sources, inventory, and transport of nitrate in the Upper Illinois River Basin (UIRB)—one of the basins with the highest N delivery amount and rate to the Gulf of Mexico. We combined the two most powerful approaches for the study of N: isotopic/chemical measurements and hydrological modeling were integrated on basin and subbasin levels to gain full understanding of N behavior in the UIRB, in order to assist people to make scientific and efficient management plans for N control and reduction. River samples were collected on the Upper Illinois River and its major tributaries from 2004 to 2008, in order to gain useful information on the basin nutrient transport and mixing processes. The measurements of nitrate concentration and isotopic values of water samples provided us with insights into the major sources of nitrate and its seasonal and temporal variations, which were indicators for studying land use impact on nutrient transport, and in-stream processes within the basin. Our study demonstrated that isotopic composition of nitrate is controlled by land use patterns, weather, and location. The influence of wastewater effluents, tributary inputs, and agricultural land on nitrate concentration and isotopic values were well documented. Potential increase in N fertilizer use is expected for expanding production of corn and cellulosic materials. SWAT (Soil and Water Assessment Tool) simulations of various fertilizer application scenarios were conducted to study the direct impact of changes in fertilization on N export and crop output respectively at basin and subbasin levels. SWAT also yielded outputs that assist us to understand in-stream denitrification processes, basin nitrate export mechanisms, and control of hydrological conditions on denitrification and N transport at basin and subbasin levels. The SWAT model results are consistent with results of the geochemical study of UIRB nitrate. SWAT simulations also add missing pieces to the understanding of environmental N behavior within the UIRB. This study demonstrates that there are huge potential benefits in modeling and geochemical studies that will allow us to enhance our knowledge of management of N and N sources and sinks, which are required to achieve the extremely challenging nitrogen reduction goal. Advisors/Committee Members: Nagy, Kathryn L. (advisor), Sturchio, Neil C. (committee member), Yan, Eugene Y. (committee member), Meler%2C%20Miquel%20A.%22%29&pagesize-30">Gonzalez-Meler, Miquel A. (committee member), Meyer-Dombard, D'Arcy R. (committee member).

Subjects/Keywords: SWAT; nitrogen; isotope; model; Illinois River Basin; eutrophication

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

APA (6^th Edition):

Lin, J. (2016). Seasonal Variations in Nitrate Flux, Transport, and Sources in the Upper Illinois River Basin. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/20250

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):

Lin, Jiajia. “Seasonal Variations in Nitrate Flux, Transport, and Sources in the Upper Illinois River Basin.” 2016. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/20250.

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

MLA Handbook (7^th Edition):

Lin, Jiajia. “Seasonal Variations in Nitrate Flux, Transport, and Sources in the Upper Illinois River Basin.” 2016. Web. 07 Mar 2021.

Vancouver:

Lin J. Seasonal Variations in Nitrate Flux, Transport, and Sources in the Upper Illinois River Basin. [Internet] [Thesis]. University of Illinois – Chicago; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/20250.

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

Council of Science Editors:

Lin J. Seasonal Variations in Nitrate Flux, Transport, and Sources in the Upper Illinois River Basin. [Thesis]. University of Illinois – Chicago; 2016. Available from: http://hdl.handle.net/10027/20250

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

University of Illinois – Chicago

9. Howell-Stephens, Jennifer A. Assessing Welfare of Armadillos Using Hormonal & Foraging Indicators, and Patch Use in Argentinean Birds.

Degree: 2012, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/9485

► This dissertation explores aspects of endocrinology and foraging ecology to study the hormone profiles and well-being of zoo-housed three-banded armadillos (Tolypeutes matacus). It also uses… (more)

▼ This dissertation explores aspects of endocrinology and foraging ecology to study the hormone profiles and well-being of zoo-housed three-banded armadillos (Tolypeutes matacus). It also uses foraging ecology to study foraging behavior in a seed-eating bird community in Argentina. Though the subjects may seem different, understanding how animals perceive and react to their environments is a common theme. Chapter 1 describes my journey to and through the dissertation, as I tackled my lab work, and broke free from my fear of field work. It also reflects my beliefs and personal goals for my post-doctorate career. Chapter 2 describes the characterization of the gonadal hormone activity of the zoo-housed three-banded armadillo. Non-invasive fecal hormone analysis was used to evaluate the fecal progestagen metabolites in females’ samples and fecal androgen metabolites in males’ samples using enzyme immunoassays. The third chapter describes the characterization of the adrenocortical activity of the zoo-housed three-banded armadillo. An adrenocorticotropic hormone (ACTH) challenge was conducted (1 male, 1 female) to validate the physiological response of elevated adrenocortical activity expected from an increase in ACTH. Biological events (aggressive pairing, copulation, pregnancy, veterinary procedures) validated the biological elevation of adrenocortical activity in response to a stressor. A longitudinal study of the adrenocortical activity of male and female armadillos was also conducted. Chapter 4 examines the integration of evaluating the adrenocortical activity and foraging behavior in zoo-housed armadillos to determine how they perceive their environment to assess their well-being. Foraging patches were used to quantify foraging intensity (giving-up densities, GUDs) of armadillos within three patch treatments (varying substrate quantity, patch quality and bedding amount). Non-invasive fecal hormone analysis was used to evaluate the fecal glucocorticoid metabolites (FGM) in male and female samples using enzyme immunoassays. The fifth chapter addresses the foraging behavior of a seed-eating bird community in Argentina. The work supports the idea that birds are major seed consumers in South America and may out-compete rodents for seeds in these communities. Giving-up densities were measured to evaluate bird’s foraging preferences. Camera traps allowed for the identification of species that foraged from food patches, along with their spatial and temporal patterns. Advisors/Committee Members: Brown, Joel S. (advisor), Santymire, Rachel M. (committee member), Whelan, Chris (committee member), Meler%2C%20Miquel%20A.%22%29&pagesize-30">Gonzalez-Meler, Miquel A. (committee member), Park, Thomas J. (committee member), Rafacz, Michelle L. (committee member).

Subjects/Keywords: armadillo; fecal hormone analysis; progesterone; testosterone; cortisol; reproduction; adrenocortical activity; giving-up densities; bird; foraging behavior; patch use

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

APA (6^th Edition):

Howell-Stephens, J. A. (2012). Assessing Welfare of Armadillos Using Hormonal & Foraging Indicators, and Patch Use in Argentinean Birds. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/9485

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):

Howell-Stephens, Jennifer A. “Assessing Welfare of Armadillos Using Hormonal & Foraging Indicators, and Patch Use in Argentinean Birds.” 2012. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/9485.

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

MLA Handbook (7^th Edition):

Howell-Stephens, Jennifer A. “Assessing Welfare of Armadillos Using Hormonal & Foraging Indicators, and Patch Use in Argentinean Birds.” 2012. Web. 07 Mar 2021.

Vancouver:

Howell-Stephens JA. Assessing Welfare of Armadillos Using Hormonal & Foraging Indicators, and Patch Use in Argentinean Birds. [Internet] [Thesis]. University of Illinois – Chicago; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/9485.

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

Council of Science Editors:

Howell-Stephens JA. Assessing Welfare of Armadillos Using Hormonal & Foraging Indicators, and Patch Use in Argentinean Birds. [Thesis]. University of Illinois – Chicago; 2012. Available from: http://hdl.handle.net/10027/9485

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

University of Illinois – Chicago

10. Czupryna, Anna M. The Ecology of Free-Roaming Domestic Dogs in Rural Villages near Serengeti National Park in Tanzania.

Degree: 2017, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/21898

► Free-roaming dogs, Canis lupus familiaris, can be both a public health and conservation concern. Between 2010 and 2013 we identified 2,649 dogs in four rural… (more)

▼ Free-roaming dogs, Canis lupus familiaris, can be both a public health and conservation concern. Between 2010 and 2013 we identified 2,649 dogs in four rural villages in Tanzania. We characterized dog demography and ownership practices and investigated whether vaccination influences dog population dynamics. We found that adult dogs had higher survival than puppies in all villages. We observed a male-biased sex ratio across all age classes and higher adult male dog survival. Within the vaccination villages, vaccinated dogs had a decreased risk of death. However, overall mortality in one non-vaccination village was significantly higher than in the two vaccination villages and other non-vaccination village. Dogs in poor body condition had lower survival than dogs in ideal body condition in all villages. Sickness and spotted hyena, Crocuta crocuta, predation were the two main causes of dog death. Reproductive patterns were similar between vaccination and non-vaccination villages and we observed an overall male-biased litter sex ratio regardless of the mother’s body condition. Dogs were owned and used primarily for livestock and household protection. We found that dog ownership was related to livestock ownership, household size, education, and house type. Thus, the number of dogs increases with household wealth. Stable isotope analyses of dog hair confirmed survey data and indicated that dogs were fed primarily a corn-based diet similar to human diet in the villages.Free-roaming domestic dogs in rural communities exist in the context of their human owners as well as the surrounding wildlife. Our results demonstrate that vaccination alone does not impact domestic dog population dynamics and that they may be mediated by humans. Understanding the role of dogs and their care within these communities is important for planning and implement rabies control measures such as mass dog vaccination. Advisors/Committee Members: Brown, Joel S (advisor), Faust, Lisa J (advisor), Santymire, Rachel M (committee member), Mehta, Supriya D (committee member), Whelan, Christopher J (committee member), Meler%2C%20Miquel%22%29&pagesize-30">Gonzalez-Meler, Miquel (committee member), Brown, Joel S (chair).

Subjects/Keywords: Demography; Domestic dog; Free-roaming dog; Non-invasive endocrinology; Rabies; Stable isotopes; Survival analysis; Tanzania

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

APA (6^th Edition):

Czupryna, A. M. (2017). The Ecology of Free-Roaming Domestic Dogs in Rural Villages near Serengeti National Park in Tanzania. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/21898

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):

Czupryna, Anna M. “The Ecology of Free-Roaming Domestic Dogs in Rural Villages near Serengeti National Park in Tanzania.” 2017. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/21898.

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

MLA Handbook (7^th Edition):

Czupryna, Anna M. “The Ecology of Free-Roaming Domestic Dogs in Rural Villages near Serengeti National Park in Tanzania.” 2017. Web. 07 Mar 2021.

Vancouver:

Czupryna AM. The Ecology of Free-Roaming Domestic Dogs in Rural Villages near Serengeti National Park in Tanzania. [Internet] [Thesis]. University of Illinois – Chicago; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/21898.

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

Council of Science Editors:

Czupryna AM. The Ecology of Free-Roaming Domestic Dogs in Rural Villages near Serengeti National Park in Tanzania. [Thesis]. University of Illinois – Chicago; 2017. Available from: http://hdl.handle.net/10027/21898

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

University of Illinois – Chicago

11. Guzman, Crystal A. Barriers to Tropical Rainforest Reforestation: Tree Seedling Regeneration in Degraded Pasture.

Degree: 2017, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/22247

► The current scale of deforestation and decline of tropical forest biodiversity stresses an important need to restore degraded tropical landscapes. This research focuses on highly… (more)

▼ The current scale of deforestation and decline of tropical forest biodiversity stresses an important need to restore degraded tropical landscapes. This research focuses on highly degraded pasture habitat where tropical forest recovery may be impeded or no longer possible. Inhibition of tree recruitment in pasture was investigated using four different approaches: 1) comprehensive meta-analysis of available peer-reviewed data on major regeneration barriers (Chapter 2), 2) experimental evaluation of dominant biotic rodent-grass pasture components (Chapter 3), 3) experimental evaluation of prevailing abiotic drought-solar radiation pasture conditions (Chapter 4) and 4) calculation of consecutive recruitment stage probabilities to assess overall seedling survival probability assessment (Chapter 5). The four different approaches illuminate processes controlling tree recruitment in pasture habitat. The meta-analysis revealed that while the overall effect of pasture habitat suppresses tree propagule abundance, some life-stages (e.g. seed removal) can be positively impacted and are associated with different life-history strategies (e.g. pioneer, persistent) (Chapter 2). The exclosure experiment revealed, as expected, that aggressive pasture grasses reduce tree seedling establishment. In addition, an inhibitory effect driven by pasture rodents on seed-seedling abundance was confirmed using the exclosure design (Chapter 3). An outdoor growing experiment was similarly utilized to test if morphological traits regulated seedling survival under water and heat stress characteristic of pasture habitat. Growing house results did not reveal reduced survivorship under sun-dry conditions. Morphological traits that increased seedling survivorship under water and heat stress included number of leaves and root length (Chapter 4). Finally, estimation of recruitment stage transition probabilities found a marked regeneration bottleneck between seed removal to germination transitions (Chapter 5). Advisors/Committee Members: Howe, Henry F (advisor), Whelan, Christopher (committee member), Wise, Davide H (committee member), Meler%2C%20Miquel%22%29&pagesize-30">Gonzalez-Meler, Miquel (committee member), Vriesendorp, Corine (committee member), Howe, Henry F (chair).

Subjects/Keywords: Regeneration barriers; Tropical Rainforest; Reforestation; Tree seedling regeneration; pastures

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

APA (6^th Edition):

Guzman, C. A. (2017). Barriers to Tropical Rainforest Reforestation: Tree Seedling Regeneration in Degraded Pasture. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/22247

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):

Guzman, Crystal A. “Barriers to Tropical Rainforest Reforestation: Tree Seedling Regeneration in Degraded Pasture.” 2017. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/22247.

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

MLA Handbook (7^th Edition):

Guzman, Crystal A. “Barriers to Tropical Rainforest Reforestation: Tree Seedling Regeneration in Degraded Pasture.” 2017. Web. 07 Mar 2021.

Vancouver:

Guzman CA. Barriers to Tropical Rainforest Reforestation: Tree Seedling Regeneration in Degraded Pasture. [Internet] [Thesis]. University of Illinois – Chicago; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/22247.

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

Council of Science Editors:

Guzman CA. Barriers to Tropical Rainforest Reforestation: Tree Seedling Regeneration in Degraded Pasture. [Thesis]. University of Illinois – Chicago; 2017. Available from: http://hdl.handle.net/10027/22247

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

12. Sombra, Moira S. Foraging, Predation and Sociality in Maras (Dolichotis patagonum).

Degree: 2012, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/9524

► Dolichotis patagonum (Rodentia: Caviidae) inhabits the central and southern desertic plains of Argentina and can weigh up to 10 Kg as an adult. Commonly called… (more)

▼ Dolichotis patagonum (Rodentia: Caviidae) inhabits the central and southern desertic plains of Argentina and can weigh up to 10 Kg as an adult. Commonly called mara or Patagonian cavy, this large rodent is a unique model to address foraging/predation questions. This study examines the foraging dynamics of maras, to begin to understand the role of predation risk on habitat selection and sociality in maras and took place in the Sierra de las Quijadas National Park, Central Argentina. Here, maras feed mainly on three habitats that vary in opportunities and challenges for vigilance, food availability, and cover from predators. I offered maras a set of artificial food patches with different levels of sight lines and examined maras’ habitat preference and response to vegetation structure in two ways: a) food patches in clearly distinguishable open or covered areas, and b) food patches as a grid with equal feeding opportunities at each station. In order to evidence the use of the patches by maras or other herbivores, motion sensor camera traps were installed at the different stations. The activity in front of these cameras was then analyzed as part of maras’ temporal habitat use section. Maras foraged significantly more in open than in covered bushy habitats when pumas are present in the area on the triplets experiment (P<0.001). Maras also displayed a complex set of behaviors regarding territory defense (marking, aggression) in response to artificial food patches at the microhabitat level. Data showed that not only maras prefer habitats with low vegetation cover and good sightlines but also visit artificial food patches during hours of light more often than during the night. These findings suggest that predation plays an important role on maras’ habitat selection and use. Individuals foraging in pares alternated foraging and vigilance such that one member of the pair was vigilante at all times. In addition, results on the landscape of fear for maras supported the species’ sensitivity to poor sightlines. There was a significant difference between food left behind in patches with a higher removal for patches with lower plant cover. Advisors/Committee Members: Brown, Joel S. (advisor), Mason-Gamer, Roberta (committee member), Meler%2C%20Miquel%22%29&pagesize-30">Gonzalez-Meler, Miquel (committee member).

Subjects/Keywords: Dolichotis patagonum; Giving up densities; Foraging and predation; Sierra de las Quijadas

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APA (6^th Edition):

Sombra, M. S. (2012). Foraging, Predation and Sociality in Maras (Dolichotis patagonum). (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/9524

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):

Sombra, Moira S. “Foraging, Predation and Sociality in Maras (Dolichotis patagonum).” 2012. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/9524.

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

MLA Handbook (7^th Edition):

Sombra, Moira S. “Foraging, Predation and Sociality in Maras (Dolichotis patagonum).” 2012. Web. 07 Mar 2021.

Vancouver:

Sombra MS. Foraging, Predation and Sociality in Maras (Dolichotis patagonum). [Internet] [Thesis]. University of Illinois – Chicago; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/9524.

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

Council of Science Editors:

Sombra MS. Foraging, Predation and Sociality in Maras (Dolichotis patagonum). [Thesis]. University of Illinois – Chicago; 2012. Available from: http://hdl.handle.net/10027/9524

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

13. Zambrano, Jenny. Dynamics of the Tropical Tree Poulsenia armata in the Fragmented Forest of Los Tuxtlas.

Degree: 2014, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/18816

► Burgeoning of human populations in rural tropical regions has accelerated fragmentation of natural habitats, with special risk to tropical rain forests. Investigation of fragmented landscapes… (more)

▼ Burgeoning of human populations in rural tropical regions has accelerated fragmentation of natural habitats, with special risk to tropical rain forests. Investigation of fragmented landscapes has increased in recent years, with many studies documenting decreased biodiversity and species persistence due to habitat fragmentation. Despite the clear impacts of forest fragmentation on community composition and structure, little is known of its demographic consequences. Tropical late-successional tree species are at a high risk of local extinction in fragmented forests. Here, I conducted a demographic study on a late-successional tropical tree, Poulsenia armata (Moraceae) at Los Tuxtlas, a fragmented Mexican forest site. At Los Tuxtlas Region, Veracruz, Mexico, almost 87% of the original forest area has been lost, with remaining remnants persisting as archipelagoes of often very small forest fragments. As a distinctive tree species with a broad geographic range, P. armata represents a strong candidate for studies of the impact of forest fragmentation on plant populations. I combined a common garden experiment to determine seed germinability and seedling performance, with field observations, seed and soil quality analyses, and the use of integral population models. Habitat fragmentation had drastic effects on the dynamics of P. armata, causing the population structure to shift towards smaller sizes and likely jeopardizing long-term persistence of fragmented populations. Additionally, forest fragmentation significantly affected P. armata reproductive success by reducing seed quality. Poor soil conditions may have negatively impacted seed production and size of P. armata from fragmented sites when compared to continuous sites. Seeds of P. armata have limited plasticity for biomass allocation, therefore, seedlings from the fragmented forest growing in poor soil cannot produce enough roots to explore more soil and compensate for the initial low N seed content. Finally, juvenile recruitment of P.armata was negatively impacted in forest fragments with desiccation being the main cause of mortality due to modified microclimatic conditions. Poor regeneration of P. armata in forest fragments of Los Tuxtlas is consistent with the general idea that old-growth tree families are recruitment-limited. Advisors/Committee Members: Howe, Henry F. (advisor), Meler%2C%20Miquel%22%29&pagesize-30">Gonzalez-Meler, Miquel (committee member), Ashley, Mary (committee member), Pfister, Catherine (committee member), Vriesendorp, Corine (committee member).

Subjects/Keywords: Forest fragmentation; population models; stable isotopes; Los Tuxtlas forest.

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APA (6^th Edition):

Zambrano, J. (2014). Dynamics of the Tropical Tree Poulsenia armata in the Fragmented Forest of Los Tuxtlas. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/18816

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):

Zambrano, Jenny. “Dynamics of the Tropical Tree Poulsenia armata in the Fragmented Forest of Los Tuxtlas.” 2014. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/18816.

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

MLA Handbook (7^th Edition):

Zambrano, Jenny. “Dynamics of the Tropical Tree Poulsenia armata in the Fragmented Forest of Los Tuxtlas.” 2014. Web. 07 Mar 2021.

Vancouver:

Zambrano J. Dynamics of the Tropical Tree Poulsenia armata in the Fragmented Forest of Los Tuxtlas. [Internet] [Thesis]. University of Illinois – Chicago; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/18816.

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

Council of Science Editors:

Zambrano J. Dynamics of the Tropical Tree Poulsenia armata in the Fragmented Forest of Los Tuxtlas. [Thesis]. University of Illinois – Chicago; 2014. Available from: http://hdl.handle.net/10027/18816

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

14. Flower, Charles E. Impacts of the Invasive Emerald Ash Borer on Ash Tree Physiology and Forest Ecology.

Degree: 2013, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/9935

► Invasive species are widely recognized as altering species and community dynamics, but their impacts on biogeochemical cycling and ecosystem processes are less understood. I investigated… (more)

Subjects/Keywords: Emerald ash borer; Fraxinus; disturbance; carbon; sapflux; net ecosystem production

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APA (6^th Edition):

Flower, C. E. (2013). Impacts of the Invasive Emerald Ash Borer on Ash Tree Physiology and Forest Ecology. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/9935

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):

Flower, Charles E. “Impacts of the Invasive Emerald Ash Borer on Ash Tree Physiology and Forest Ecology.” 2013. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/9935.

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

MLA Handbook (7^th Edition):

Flower, Charles E. “Impacts of the Invasive Emerald Ash Borer on Ash Tree Physiology and Forest Ecology.” 2013. Web. 07 Mar 2021.

Vancouver:

Flower CE. Impacts of the Invasive Emerald Ash Borer on Ash Tree Physiology and Forest Ecology. [Internet] [Thesis]. University of Illinois – Chicago; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/9935.

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

Council of Science Editors:

Flower CE. Impacts of the Invasive Emerald Ash Borer on Ash Tree Physiology and Forest Ecology. [Thesis]. University of Illinois – Chicago; 2013. Available from: http://hdl.handle.net/10027/9935

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

15. Poghosyan, Armen. Global Geochemical Cycle of Perchlorate.

Degree: 2014, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/11302

► The Great Lakes hydrologic system is one of the world’s most valuable natural resources, and over time its value will only rise with increasing fresh… (more)

▼ The Great Lakes hydrologic system is one of the world’s most valuable natural resources, and over time its value will only rise with increasing fresh water demand of the fast-growing human population. Millions of people and a wide range of large industries both in the United States and Canada depend on the Great Lakes for their water supply. Despite having some negative effects on the Great Lakes, the industrialization of this region has enormous economical benefits for both countries, thus making it implausible to ban all activities or compounds that could potentially degrade Great Lakes water quality. The key for sustainable future development is to maintain the economic vitality of the Great Lakes region without compromising the ecological balance and water quality in the Great Lakes basin. In order to sustain environmentally sound progress in the Great Lakes region it is essential to have a comprehensive understanding of the behavior and origin of contaminants having potentially adverse effects on the ecosystem. As a contribution to this understanding, we investigated perchlorate origin, transport, and biodegradation and uptake in all five lakes by using perchlorate concentrations, oxygen and chlorine isotope ratios (δ18O, Δ17O, δ37Cl, 36Cl/Cl). In addition, we investigated the isotopic composition of chloride from the Great Lakes (δ37Cl, 36Cl/Cl) to provide a comparison of perchlorate with a relatively well-understood conservative contaminant. Overall, this study has identified the dominant source of Great Lakes perchlorate and evaluated its biogeochemical cycle in a hydrological context. The combination of concentration and isotopic analyses and numerical models quantify the perchlorate inputs from all potential sources and perchlorate outputs through outflow and other processes (e.g. biodegradation and uptake). We also quantified isotopic fractionation effects associated with the perchlorate loss in the Great Lakes basin. The numerical models successfully explain the observed temporal evolution of 36Cl/Cl ratios in perchlorate and chloride from the Great Lakes over the last 70 years. The new insights obtained on the behavior of these conservative solutes may provide a useful reference for studies of the origin and behavior of other contaminants in the Great Lakes system. Advisors/Committee Members: Sturchio, Neil C. (advisor), Nagy, Kathryn L. (committee member), Doran, Peter T. (committee member), Meler%2C%20Miquel%22%29&pagesize-30">Gonzalez-Meler, Miquel (committee member), Böhlke, John Karl F. (committee member).

Subjects/Keywords: perchlorate; isotope; model

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APA (6^th Edition):

Poghosyan, A. (2014). Global Geochemical Cycle of Perchlorate. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/11302

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):

Poghosyan, Armen. “Global Geochemical Cycle of Perchlorate.” 2014. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/11302.

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

MLA Handbook (7^th Edition):

Poghosyan, Armen. “Global Geochemical Cycle of Perchlorate.” 2014. Web. 07 Mar 2021.

Vancouver:

Poghosyan A. Global Geochemical Cycle of Perchlorate. [Internet] [Thesis]. University of Illinois – Chicago; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/11302.

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

Council of Science Editors:

Poghosyan A. Global Geochemical Cycle of Perchlorate. [Thesis]. University of Illinois – Chicago; 2014. Available from: http://hdl.handle.net/10027/11302

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

16. Bellucci, Francesco. Greenhouse Gas Emissions from Three Full-Scale Metropolitan Wastewater Reclamation Plants.

Degree: 2012, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/9038

► Domestic and industrial wastewater treatment plants (WWTPs) have been estimated to be the 7th highest contributors to atmospheric concentrations of both nitrous oxide (N2O) and… (more)

▼ Domestic and industrial wastewater treatment plants (WWTPs) have been estimated to be the 7th highest contributors to atmospheric concentrations of both nitrous oxide (N2O) and methane (CH4), respectively. This project identified the sources of N2O and CH4 within three conventional activated-sludge plug-flow WWTPs, and quantified their annual total fluxes. Additionally, this project characterized these GHG emissions, using carbon and nitrogen isotope measurements, to investigate the possible biological sources of these gases. Sampling was conducted at the Stickney, North Side, and Egan WWTPs in the Chicago area. The results show that the aeration basins represent the main source (> 85%) of N2O. Methane is produced by a variety of processes where anaerobic conditions develop. A significant contribution to total GHG fluxes from the plants is also constituted by the plant exhausts. The calculated cumulative fluxes from the Stickney WWTP were 5.9 x 105 kg N2O/y (204 g/Pe/y), and 2.8 x 106 kg/y of CH4 (1122 g/Pe/y). The calculated cumulative fluxes for the North Side WWTP were 1.7 x 104 kg/y N2O (12.3 g/Pe/y), and 8.6 x 104 kg/y CH4 (61.1 g/Pe/y). The calculated cumulative fluxes from the Egan WWTP were 1.6 x 104 kg/y N2O (91.8 g/Pe/y), and 6.0 x 104 CH4 (353.6 g/Pe/y). About 0.94%, 0.16%, and 0.97% of the incoming total Kjeldahl nitrogen (TKN) is emitted as N2O at Stickney, North Side, and Egan respectively. The study of the site-specific stable nitrogen isotope distribution in N2O showed a site preference averaging ~0‰, indicating that this GHG is produced mainly by denitrification of ammonia. The study of bulk stable nitrogen isotope ratios of nitrate and ammonia showed a trend that can be modeled with ammonia nitrification plus a variable amount (5-20%) of nitrate denitrification. Advisors/Committee Members: Sturchio, Neil C. (advisor), Nagy, Kathryn L. (committee member), Meyer-Dombard, D'Arcy R. (committee member), Meler%2C%20Miquel%20A.%22%29&pagesize-30">Gonzalez-Meler, Miquel A. (committee member), Kozak, Joseph A. (committee member).

Subjects/Keywords: Greenhouse gas emissions; Wastewater; Nitrous oxide; Methane; Stable isotope; Isotopomers

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

APA (6^th Edition):

Bellucci, F. (2012). Greenhouse Gas Emissions from Three Full-Scale Metropolitan Wastewater Reclamation Plants. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/9038

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):

Bellucci, Francesco. “Greenhouse Gas Emissions from Three Full-Scale Metropolitan Wastewater Reclamation Plants.” 2012. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/9038.

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

MLA Handbook (7^th Edition):

Bellucci, Francesco. “Greenhouse Gas Emissions from Three Full-Scale Metropolitan Wastewater Reclamation Plants.” 2012. Web. 07 Mar 2021.

Vancouver:

Bellucci F. Greenhouse Gas Emissions from Three Full-Scale Metropolitan Wastewater Reclamation Plants. [Internet] [Thesis]. University of Illinois – Chicago; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/9038.

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

Council of Science Editors:

Bellucci F. Greenhouse Gas Emissions from Three Full-Scale Metropolitan Wastewater Reclamation Plants. [Thesis]. University of Illinois – Chicago; 2012. Available from: http://hdl.handle.net/10027/9038

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

17. Caballero, Isabel C. Genetic Structure in Peregrine Falcons (Falco peregrinus): An Assessment Using Multiple Markers.

Degree: 2012, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/9260

► The Peregrine Falcon (Falco peregrinus) is a bird of prey with one of the largest natural distributions of any avian species. This thesis explores its… (more)

▼ The Peregrine Falcon (Falco peregrinus) is a bird of prey with one of the largest natural distributions of any avian species. This thesis explores its mating system, effects of reintroductions, and worldwide population structure. Research questions are focused on different spatial and geographical scales, making use of nuclear and mitochondrial data to address these questions. The use of the pesticide DDT had negative impacts on Peregrine populations causing extirpation or sharp reduction in numbers. On a local level, I investigate the breeding and dispersal patterns in urban- dwelling reintroduced Midwestern Peregrine Falcons. Data was gathered from a total of 282 chicks and 68 additional birds with most extensive sampling from Chicago. I found high nest site fidelity, long-term mate fidelity, and two instances of extra-pair paternity. My results are in accordance with previous findings for other raptors that genetic monogamy is the rule and nest site fidelity is frequent. On a regional level, I focused on historical changes in Midwestern populations as well as effects of management practices in Western and Midwestern Peregrines. For the historical aspect, I detected differences in levels of genetic diversity in extirpated and reintroduced Peregrines. Bayesian clustering analysis of microsatellite data revealed a genotypic shift between historical and contemporary populations. The cause of this shift is likely the result of the use of non-native stock in the recovery process. For the regional comparison of reintroduced birds, Western management practices involved the use of remnant birds while in the Midwestern non-native stock was used. Analyses were carried out on 192 birds, 112 individuals representing recovered Western US populations and 80 individuals from the Midwest. I found genetic differentiation among populations, and similar levels of genetic diversity across regions. Microsatellite data separate Western Peregrines into three distinct genetic clusters: (i) Channel Islands and Southern California; ii) Northern California and Oregon; and iii) Washington. These genetic patterns were concordant with previous ecological modeling studies. My results do not support the hypothesis that different management techniques have left an imprint on these recovered populations, but there is genetic structure consistent with the original groups on which management plans were focused. On a global level, worldwide Peregrines exhibit regional differences in behavior, morphology, and demographic history. A mix of migratory and resident breeding populations occurs in the northern hemisphere while exclusively resident breeding populations occur in the southern hemisphere where northern migrants come to winter. To understand how Peregrines evolved such a wide-ranging distribution I compared two alternative hypotheses of range expansion: Isolation by Distance, and Suspension of Migration. Genetic results show low to medium degrees of genetic differentiation among northern hemisphere Peregrines while significant differentiation… Advisors/Committee Members: Ashley, Mary V. (advisor), Bates, John M. (advisor), Bates, John M. (committee member), Mason-Gamer, Roberta J. (committee member), Meler%2C%20Miquel%20A.%22%29&pagesize-30">Gonzalez-Meler, Miquel A. (committee member), Whelan, Christopher J. (committee member), Berger-Wolf, Tanya Y. (committee member).

Subjects/Keywords: Peregrine Falcon; DDT; microsatellites; mitochondrial DNA; mating system; pesticides; Isolation by Distance; migration; Falco peregrinus; Dichloro-diphenyl-trichloroethane

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

APA (6^th Edition):

Caballero, I. C. (2012). Genetic Structure in Peregrine Falcons (Falco peregrinus): An Assessment Using Multiple Markers. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/9260

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):

Caballero, Isabel C. “Genetic Structure in Peregrine Falcons (Falco peregrinus): An Assessment Using Multiple Markers.” 2012. Thesis, University of Illinois – Chicago. Accessed March 07, 2021. http://hdl.handle.net/10027/9260.

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

MLA Handbook (7^th Edition):

Caballero, Isabel C. “Genetic Structure in Peregrine Falcons (Falco peregrinus): An Assessment Using Multiple Markers.” 2012. Web. 07 Mar 2021.

Vancouver:

Caballero IC. Genetic Structure in Peregrine Falcons (Falco peregrinus): An Assessment Using Multiple Markers. [Internet] [Thesis]. University of Illinois – Chicago; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10027/9260.

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

Council of Science Editors:

Caballero IC. Genetic Structure in Peregrine Falcons (Falco peregrinus): An Assessment Using Multiple Markers. [Thesis]. University of Illinois – Chicago; 2012. Available from: http://hdl.handle.net/10027/9260

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

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Open Access Theses and Dissertations