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University of Georgia
1.
Small, Gaston Elvin.
Phosphorus dynamics in neotropical stream food webs: effects of stream phosphorus loading on consumer physiology, and the role of consumers in recycling nutrients.
Degree: PhD, Ecology, 2010, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/small_gaston_e_201005_phd 
► Humans have dramatically altered global biogeochemical cycles, resulting in widespread nutrient pollution in freshwater ecosystems. The harmful effects of eutrophication are well-documented in lakes and…
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▼ Humans have dramatically altered global biogeochemical cycles, resulting in widespread nutrient pollution in freshwater ecosystems. The harmful effects of eutrophication are well-documented in lakes and estuaries, but less in known about the effects of sustained nutrient pollution in streams, mostly due to the short-term nature of most experiments. In this study, I use a series of streams in lowland Costa Rica that naturally vary in dissolved phosphorus (P) levels due to inputs of solute-rich groundwater to investigate the effects of sustained, high levels of P-loading on
stream food webs. I ask two major questions: (1) What are the effects of sustained P-loading on consumer physiology? and (2) What role do consumers play in supplying limiting nutrients in these
stream ecosystems? In the naturally high-P streams, invertebrate consumers increased two-fold in body P-content, showing that the elemental composition of consumers can reflect their environmental conditions as much as their phylogeny. For one important group of invertebrate detritivores, chironomid larvae, I found that P-demand reflected food quality in streams across this heterogeneous landscape. As a result, chironomids from low-P streams circumvented P-limitation, and did not respond to P-enriched food resources with increased growth rates, which may act to stabilize this detritus-based food web against perturbations caused by nutrient enrichment. I found that all fish species in high-P streams excreted P at high rates, but in a low-P
stream, P-excretion rates for species with higher body P-content were negligible. In the low-P focal
stream, one species accounted for 90% of P recycled by the fish assemblage, even though it only represented 18 % of the total fish biomass, due to its high-P diet and low body P-demand. Finally, I quantified the potential importance of terrestrial insects as a nutrient subsidy in rainforest streams, showing that this nutrient pathway may supply a significant fraction of nutrient demand in small headwater streams. This dissertation improves our understanding of how rates of nutrient retention and recycling by organisms are affected by ecosystem nutrient availability, which ultimately determines the resilience of ecosystems to anthropogenic nutrient pollution.
Advisors/Committee Members: Catherine Pringle.
Subjects/Keywords: Stream
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APA (6th Edition):
Small, G. E. (2010). Phosphorus dynamics in neotropical stream food webs: effects of stream phosphorus loading on consumer physiology, and the role of consumers in recycling nutrients. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/small_gaston_e_201005_phd
Chicago Manual of Style (16th Edition):
Small, Gaston Elvin. “Phosphorus dynamics in neotropical stream food webs: effects of stream phosphorus loading on consumer physiology, and the role of consumers in recycling nutrients.” 2010. Doctoral Dissertation, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/small_gaston_e_201005_phd.
MLA Handbook (7th Edition):
Small, Gaston Elvin. “Phosphorus dynamics in neotropical stream food webs: effects of stream phosphorus loading on consumer physiology, and the role of consumers in recycling nutrients.” 2010. Web. 07 Apr 2020.
Vancouver:
Small GE. Phosphorus dynamics in neotropical stream food webs: effects of stream phosphorus loading on consumer physiology, and the role of consumers in recycling nutrients. [Internet] [Doctoral dissertation]. University of Georgia; 2010. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/small_gaston_e_201005_phd.
Council of Science Editors:
Small GE. Phosphorus dynamics in neotropical stream food webs: effects of stream phosphorus loading on consumer physiology, and the role of consumers in recycling nutrients. [Doctoral Dissertation]. University of Georgia; 2010. Available from: http://purl.galileo.usg.edu/uga_etd/small_gaston_e_201005_phd
University of Georgia
2.
Milanovich, Joseph Ross.
Modeling the current and future roles of stream salamanders in headwater streams.
Degree: PhD, Forest Resources, 2010, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/milanovich_joseph_r_201008_phd
► Communities are shaped by environmental conditions and the interactions within those environments, and changes in community composition or dynamics will in turn affect the environment…
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▼ Communities are shaped by environmental conditions and the interactions within those environments, and changes in community composition or dynamics will in turn affect the environment through alteration of ecosystem processes. With humans rapidly altering ecosystems, predicting how environmental changes may lead to species losses, and how those biotic changes will feedback on ecosystem processes has emerged as a critical challenge. The southern Appalachian Mountains are a global hotspot for
stream plethodontids, which are the numerically dominant vertebrate predators of high-elevation first order streams, and as such are hypothesized to be influential in a number of ecosystem processes. The objectives of this dissertation were to determine how projected shifts in salamander-community composition resulting from climate change may affect the retention of nutrients within first-and second-order streams. To meet this objective, elemental mass and excretion rates of salamanders was quantified to estimate the amount of nutrients captured and exported by a
stream-salamander community, predictive models of species loss under climate-change scenarios were generated, and experiments were used to determine whether predicted species losses altered nutrient retention or whether compensation by other salamander species may occur. Research was conducted within the Coweeta Hydrological Laboratory basin (NC, USA). Plethodontids showed variation in elemental stoichiometry and relationships between body stoichiometry, body size, and excretion stoichiometry. Larval plethodontids were significant nutrient reservoirs when compared to other
stream taxa, which implies that they are important to
stream nutrient retention and nutrient cycling within streams. Excretion rates were low, but densities were high, and preliminary evidence indicates that plethodontids play a large role in re-release of nutrients. Models project a decline in suitable habitat associated with climate change scenarios for most currently dominant salamander species within the Coweeta basin, potentially affecting their role in nutrient retention. Furthermore, our results suggest that subordinate plethodontid species are able to compensate for species losses with respect to nutrient retention if their densities increase. Since plethodontids exhibit high diversity in the region and are significant contributors to a number of ecosystem processes, these projections identify a significant potential change to ecosystem function in southern Appalachian headwater streams.
Advisors/Committee Members: John C Maerz.
Subjects/Keywords: Stream
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APA (6th Edition):
Milanovich, J. R. (2010). Modeling the current and future roles of stream salamanders in headwater streams. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/milanovich_joseph_r_201008_phd
Chicago Manual of Style (16th Edition):
Milanovich, Joseph Ross. “Modeling the current and future roles of stream salamanders in headwater streams.” 2010. Doctoral Dissertation, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/milanovich_joseph_r_201008_phd.
MLA Handbook (7th Edition):
Milanovich, Joseph Ross. “Modeling the current and future roles of stream salamanders in headwater streams.” 2010. Web. 07 Apr 2020.
Vancouver:
Milanovich JR. Modeling the current and future roles of stream salamanders in headwater streams. [Internet] [Doctoral dissertation]. University of Georgia; 2010. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/milanovich_joseph_r_201008_phd.
Council of Science Editors:
Milanovich JR. Modeling the current and future roles of stream salamanders in headwater streams. [Doctoral Dissertation]. University of Georgia; 2010. Available from: http://purl.galileo.usg.edu/uga_etd/milanovich_joseph_r_201008_phd
University of Georgia
3.
Maurano, Stephen Paul.
Modeling stream fish biogeography to assess water quality in a species-rich region.
Degree: MS, Ecology, 2015, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/maurano_stephen_p_201512_ms
► Natural resource managers commonly monitor fish to assess the water quality condition of streams. I have evaluated a biological assessment metric, based on observed and…
(more)
▼ Natural resource managers commonly monitor fish to assess the water quality condition of streams. I have evaluated a biological assessment metric, based on observed and expected fish species richness, for application in Georgia. A multivariate species distribution model was built using a Random Forest machine-learning algorithm to predict expected fish taxa based on a stream’s environmental characteristics, such as elevation, slope, and flow. The ratio of observed to expected taxa richness was then used to estimate whether a
stream was close to, or far from, a least-disturbed condition. The model was useful in the species-rich northern half of the state above the Fall Line, but inadequate in the less speciose southern half. This research analyzed the biogeography of Georgia’s fishes, demonstrated a tradeoff when including rare species in bioassessment, exhibited the sensitivity of fluvial taxa to human disturbance, and provided an additional method for assessing
stream conditions in the state.
Advisors/Committee Members: Mary Freeman.
Subjects/Keywords: Stream
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APA (6th Edition):
Maurano, S. P. (2015). Modeling stream fish biogeography to assess water quality in a species-rich region. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/maurano_stephen_p_201512_ms
Chicago Manual of Style (16th Edition):
Maurano, Stephen Paul. “Modeling stream fish biogeography to assess water quality in a species-rich region.” 2015. Masters Thesis, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/maurano_stephen_p_201512_ms.
MLA Handbook (7th Edition):
Maurano, Stephen Paul. “Modeling stream fish biogeography to assess water quality in a species-rich region.” 2015. Web. 07 Apr 2020.
Vancouver:
Maurano SP. Modeling stream fish biogeography to assess water quality in a species-rich region. [Internet] [Masters thesis]. University of Georgia; 2015. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/maurano_stephen_p_201512_ms.
Council of Science Editors:
Maurano SP. Modeling stream fish biogeography to assess water quality in a species-rich region. [Masters Thesis]. University of Georgia; 2015. Available from: http://purl.galileo.usg.edu/uga_etd/maurano_stephen_p_201512_ms
Louisiana State University
4.
Ward, Brian Michael.
M. effects of land use and habitat on stream fish assemblages in tributaries of the lower Bogue Chitto watershed, Washington Parish, Louisiana.
Degree: MS, Environmental Sciences, 2009, Louisiana State University
URL: etd-08272009-165154
;
https://digitalcommons.lsu.edu/gradschool_theses/2342
► My research focused on how fish communities are responding to watershed land use and instream habitat in tributaries of the Lower Bogue Chitto River. To…
(more)
▼ My research focused on how fish communities are responding to watershed land use and instream habitat in tributaries of the Lower Bogue Chitto River. To address this question I electrofished and seined 10 sites in four tributaries of the Bogue Chitto River a total of 4 times each over the course of 15 months in 2007 and 2008. I characterized habitat by measuring water flow, water depth, substrate size, woody debris, temperature, and dissolved oxygen, and quantified heterotrophic plate counts, nutrients, and chlorophyll a concentrations at the end of the sampling period each year. Watershed land cover was measured with 2001 USGS Land use/Land cover data, and my analysis focused on cultivated cropland and pasture land, as well as forested and herbaceous wetlands. Many of the most common fishes responded positively to differences in stream characteristics, particularly increased nitrate and agricultural development, and decreased wetlands, which are typically characteristic of anthropogenic stream impacts. Other fishes responded to increased flow and substrate size, which appeared to characterize less disturbed stream conditions. Overall, fish diversity was negatively associated with distance from the mainstem Bogue Chitto River. These results suggest that in nutrient limited systems, some fishes respond positively to anthropogenic alterations, and that watershedbased characteristics are more important than local habitat variables in predicting fish assemblage composition and abundance in these streams.
Subjects/Keywords: landscape; stream habitat; stream ecology
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APA (6th Edition):
Ward, B. M. (2009). M. effects of land use and habitat on stream fish assemblages in tributaries of the lower Bogue Chitto watershed, Washington Parish, Louisiana. (Masters Thesis). Louisiana State University. Retrieved from etd-08272009-165154 ; https://digitalcommons.lsu.edu/gradschool_theses/2342
Chicago Manual of Style (16th Edition):
Ward, Brian Michael. “M. effects of land use and habitat on stream fish assemblages in tributaries of the lower Bogue Chitto watershed, Washington Parish, Louisiana.” 2009. Masters Thesis, Louisiana State University. Accessed April 07, 2020.
etd-08272009-165154 ; https://digitalcommons.lsu.edu/gradschool_theses/2342.
MLA Handbook (7th Edition):
Ward, Brian Michael. “M. effects of land use and habitat on stream fish assemblages in tributaries of the lower Bogue Chitto watershed, Washington Parish, Louisiana.” 2009. Web. 07 Apr 2020.
Vancouver:
Ward BM. M. effects of land use and habitat on stream fish assemblages in tributaries of the lower Bogue Chitto watershed, Washington Parish, Louisiana. [Internet] [Masters thesis]. Louisiana State University; 2009. [cited 2020 Apr 07].
Available from: etd-08272009-165154 ; https://digitalcommons.lsu.edu/gradschool_theses/2342.
Council of Science Editors:
Ward BM. M. effects of land use and habitat on stream fish assemblages in tributaries of the lower Bogue Chitto watershed, Washington Parish, Louisiana. [Masters Thesis]. Louisiana State University; 2009. Available from: etd-08272009-165154 ; https://digitalcommons.lsu.edu/gradschool_theses/2342
University of Georgia
5.
Price, Alison Louise.
Development and evaluation of sampling protocols for at-risk fishes in wadeable warmwater streams.
Degree: MS, Forest Resources, 2008, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/price_alison_l_200812_ms
► Natural resource managers make decisions based on the analyses of fish sample data; hence it is imperative to use unbiased data with low variance. The…
(more)
▼ Natural resource managers make decisions based on the analyses of fish sample data; hence it is imperative to use unbiased data with low variance. The ability to capture fishes (capture efficiency) varies among methods and site- and species-characteristics. Failure to account for capture efficiency can bias sample data. High variance also influences data quality and can obfuscate important relationships and population trends. I evaluated two commonly-used fish sampling protocols in 31 streams the Upper Coosa Basin, Georgia, modeled fish capture efficiency, and evaluated the sources of sample variance. Capture efficiency was low and varied among species, between methods, and was related to
stream habitat characteristics. I also estimated fish movement out of unblocked sample units during sampling and calculated unconditional capture efficiency. Failure to account for incomplete capture of fish introduces bias and variance in sampling data and may lead to poor inference, particularly for at-risk fishes.
Advisors/Committee Members: James Peterson.
Subjects/Keywords: stream fish
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APA (6th Edition):
Price, A. L. (2008). Development and evaluation of sampling protocols for at-risk fishes in wadeable warmwater streams. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/price_alison_l_200812_ms
Chicago Manual of Style (16th Edition):
Price, Alison Louise. “Development and evaluation of sampling protocols for at-risk fishes in wadeable warmwater streams.” 2008. Masters Thesis, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/price_alison_l_200812_ms.
MLA Handbook (7th Edition):
Price, Alison Louise. “Development and evaluation of sampling protocols for at-risk fishes in wadeable warmwater streams.” 2008. Web. 07 Apr 2020.
Vancouver:
Price AL. Development and evaluation of sampling protocols for at-risk fishes in wadeable warmwater streams. [Internet] [Masters thesis]. University of Georgia; 2008. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/price_alison_l_200812_ms.
Council of Science Editors:
Price AL. Development and evaluation of sampling protocols for at-risk fishes in wadeable warmwater streams. [Masters Thesis]. University of Georgia; 2008. Available from: http://purl.galileo.usg.edu/uga_etd/price_alison_l_200812_ms
University of Georgia
6.
Riley, Jeffrey William.
Assessing morphological adjustments of stream channels in the Piedmont region of Georgia, USA.
Degree: MS, Forest Resources, 2009, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/riley_jeffrey_w_200908_ms
► As part of a U.S. Geological Survey (USGS) study investigating the effects of altered flow on ecosystems in the Upper Flint River Basin information was…
(more)
▼ As part of a U.S. Geological Survey (USGS) study investigating the effects of altered flow on ecosystems in the Upper Flint River Basin information was needed regarding the stability of
stream channels. This was to determine if ongoing channel adjustments could be of sufficient magnitude to mask the effects of hydrologic alteration and simultaneously use channel stability as a proxy for the persistence of in-
stream habitat conditions. A combination of data analysis from USGS
stream gage stations supported by field studies were used to evaluate channel adjustments. Results indicate that channels have been dynamic over the course of record. Some locations exhibited distinct trends of degradation while others appeared dynamically stable. It appears that local scale disturbances are more likely responsible, due to the discontinuous nature of channel adjustments, than watershed scale land
cover changes.
Advisors/Committee Members: Todd C. Rasmussen.
Subjects/Keywords: Stream alteration
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APA (6th Edition):
Riley, J. W. (2009). Assessing morphological adjustments of stream channels in the Piedmont region of Georgia, USA. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/riley_jeffrey_w_200908_ms
Chicago Manual of Style (16th Edition):
Riley, Jeffrey William. “Assessing morphological adjustments of stream channels in the Piedmont region of Georgia, USA.” 2009. Masters Thesis, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/riley_jeffrey_w_200908_ms.
MLA Handbook (7th Edition):
Riley, Jeffrey William. “Assessing morphological adjustments of stream channels in the Piedmont region of Georgia, USA.” 2009. Web. 07 Apr 2020.
Vancouver:
Riley JW. Assessing morphological adjustments of stream channels in the Piedmont region of Georgia, USA. [Internet] [Masters thesis]. University of Georgia; 2009. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/riley_jeffrey_w_200908_ms.
Council of Science Editors:
Riley JW. Assessing morphological adjustments of stream channels in the Piedmont region of Georgia, USA. [Masters Thesis]. University of Georgia; 2009. Available from: http://purl.galileo.usg.edu/uga_etd/riley_jeffrey_w_200908_ms
University of Georgia
7.
Davis, John Michael.
Food web response to long-term experimental enrichment of a detritus-based stream ecosystem.
Degree: PhD, Ecology, 2009, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/davis_john_m_200912_phd
► Nutrient enrichment of freshwater ecosystems is occurring on a global scale with significant effects on their structure and function. However, our current understanding of these…
(more)
▼ Nutrient enrichment of freshwater ecosystems is occurring on a global scale with significant effects on their structure and function. However, our current understanding of these effects is limited because of the paucity of long-term experimental manipulations in detritus-based food webs. This study assessed the effects of enrichment in a detritus-based headwater
stream. Using a paired watershed design, macroinvertebrate abundance, biomass, and production were compared in a treatment and reference
stream during a five-year continuous enrichment. I examined whether the effects of nutrient enrichment varied between primary consumers and predators and whether consumer body size mediated consumer responses. To determine how changes in community structure affected nutrient fluxes, I also quantified the nutrient assimilation and excretion rate of a dominant primary consumer, Pycnopsyche spp. (Trichoptera). I also tested whether enrichment altered subsidies to riparian consumers via increased aquatic insect emergence from the nutrient-enriched
stream.
During the fourth and fifth year of enrichment, nutrient enrichment stimulated primary consumer, but not predator, production and biomass. The increased dominance of large-bodied primary consumers that were predator-resistant likely attenuated the positive nutrient effect on higher trophic levels. Consumer response to nutrient enrichment also varied with body size, but this body size effect varied with trophic level. Specifically, enrichment increased the abundance and biomass of large-bodied primary consumers, but not large-bodied predators. Nutrient enrichment also accelerated the rate that Pycnopsyche assimilated and excreted nitrogen and phosphorus. Because Pycnopsyche disproportionately increased their rate of phosphorus assimilation relative to nitrogen, Pycnopsyche facilitated phosphorus sequestration at the
stream-level. Despite nutrient enrichment doubling aquatic emergence biomass, it did not increase the biomass or abundance of riparian spiders, likely because of the increased dominance of predator-resistant prey. Enrichment increased the relative abundance of Trichoptera and the individual body size of emerging adults; two groups of prey that are not readily eaten by spiders. Thus, shifts in the primary consumer composition reduced the positive effects of nutrient enrichment on instream and riparian predators. Because consumer body size was an important factor determining how nutrient enrichment affected this
stream food web, such species-specific traits may be key determinants in predicting ecosystem-level responses to nutrient enrichment.
Advisors/Committee Members: Amy Rosemond.
Subjects/Keywords: Headwater stream
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Manager
APA (6th Edition):
Davis, J. M. (2009). Food web response to long-term experimental enrichment of a detritus-based stream ecosystem. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/davis_john_m_200912_phd
Chicago Manual of Style (16th Edition):
Davis, John Michael. “Food web response to long-term experimental enrichment of a detritus-based stream ecosystem.” 2009. Doctoral Dissertation, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/davis_john_m_200912_phd.
MLA Handbook (7th Edition):
Davis, John Michael. “Food web response to long-term experimental enrichment of a detritus-based stream ecosystem.” 2009. Web. 07 Apr 2020.
Vancouver:
Davis JM. Food web response to long-term experimental enrichment of a detritus-based stream ecosystem. [Internet] [Doctoral dissertation]. University of Georgia; 2009. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/davis_john_m_200912_phd.
Council of Science Editors:
Davis JM. Food web response to long-term experimental enrichment of a detritus-based stream ecosystem. [Doctoral Dissertation]. University of Georgia; 2009. Available from: http://purl.galileo.usg.edu/uga_etd/davis_john_m_200912_phd
University of Georgia
8.
Menhart, Dustin Alan.
Using terrestrial photography to measure stream morphology.
Degree: MS, Geography, 2011, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/menhart_dustin_a_201108_ms
► The ability to properly identify stream channel morphology is an essential tool for all fluvial geomorphologists and river scientists. Research compared measurements from traditional stream…
(more)
▼ The ability to properly identify
stream channel morphology is an essential tool for all fluvial geomorphologists and river scientists. Research compared measurements from
traditional
stream channel survey to a terrestrial photography technique that evaluated
variables from
stream channels. Statistical results show that a photographic methodology
accurately measures and describes morphological parameters considered in this study.
Classification systems were created to identify dominant bed material and physical
habitat for the ten vegetative (5 forested/ 5 pastured) streams surveyed. This scientific
technique was performed on streams in the southern Blue Ridge Mountains near Coweeta
Long Term Ecological Research Center.
Advisors/Committee Members: David S. Leigh.
Subjects/Keywords: Stream Morphology
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Manager
APA (6th Edition):
Menhart, D. A. (2011). Using terrestrial photography to measure stream morphology. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/menhart_dustin_a_201108_ms
Chicago Manual of Style (16th Edition):
Menhart, Dustin Alan. “Using terrestrial photography to measure stream morphology.” 2011. Masters Thesis, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/menhart_dustin_a_201108_ms.
MLA Handbook (7th Edition):
Menhart, Dustin Alan. “Using terrestrial photography to measure stream morphology.” 2011. Web. 07 Apr 2020.
Vancouver:
Menhart DA. Using terrestrial photography to measure stream morphology. [Internet] [Masters thesis]. University of Georgia; 2011. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/menhart_dustin_a_201108_ms.
Council of Science Editors:
Menhart DA. Using terrestrial photography to measure stream morphology. [Masters Thesis]. University of Georgia; 2011. Available from: http://purl.galileo.usg.edu/uga_etd/menhart_dustin_a_201108_ms
University of Georgia
9.
Long, Sarah Lynsey.
Variation of stream temperature among mesoscale habitats in the upper Little Tennessee River basin.
Degree: MS, Forest Resources, 2011, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/long_sarah_l_201112_ms
► The purpose of this study is to determine if there are systematic differences in stream temperature between mesoscale habitats as a result of hyporheic exchange…
(more)
▼ The purpose of this study is to determine if there are systematic differences in
stream temperature between mesoscale habitats as a result of hyporheic exchange in the upper Little Tennessee River basin. Secondary objectives are to evaluate relationships between
stream temperature and riparian condition and environmental controls. Data loggers were set out in 44 sites in the upper Little Tennessee River basin with ten loggers in each site: three in riffles, three in pools, three in alcoves and one in the main riffle. The temperature differences between habitat types are the opposite of what was expected in the presence of hyporheic exchange, indicating that hyporheic exchange is not a dominant driver of mesoscale habitat temperatures at these sites. Partially forested sites exhibit greater spatial variation and temperature ranges than fully forested sites, indicating that location of temperature logger placement is important in partially forested sites.
Advisors/Committee Members: C. Rhett Jackson.
Subjects/Keywords: Stream temperature
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Manager
APA (6th Edition):
Long, S. L. (2011). Variation of stream temperature among mesoscale habitats in the upper Little Tennessee River basin. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/long_sarah_l_201112_ms
Chicago Manual of Style (16th Edition):
Long, Sarah Lynsey. “Variation of stream temperature among mesoscale habitats in the upper Little Tennessee River basin.” 2011. Masters Thesis, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/long_sarah_l_201112_ms.
MLA Handbook (7th Edition):
Long, Sarah Lynsey. “Variation of stream temperature among mesoscale habitats in the upper Little Tennessee River basin.” 2011. Web. 07 Apr 2020.
Vancouver:
Long SL. Variation of stream temperature among mesoscale habitats in the upper Little Tennessee River basin. [Internet] [Masters thesis]. University of Georgia; 2011. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/long_sarah_l_201112_ms.
Council of Science Editors:
Long SL. Variation of stream temperature among mesoscale habitats in the upper Little Tennessee River basin. [Masters Thesis]. University of Georgia; 2011. Available from: http://purl.galileo.usg.edu/uga_etd/long_sarah_l_201112_ms
University of Georgia
10.
Tant, Cynthia Janelle.
Detrital carbon response to experimental enrichment and impacts on associated consumers in a headwater stream.
Degree: PhD, Ecology, 2011, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/tant_cynthia_j_201112_phd
► Nutrient enrichment of aquatic ecosystems is occurring globally as a result of mobilization of nitrogen and phosphorus from a variety of anthropogenic sources. Responses to…
(more)
▼ Nutrient enrichment of aquatic ecosystems is occurring globally as a result of mobilization of nitrogen and phosphorus from a variety of anthropogenic sources. Responses to enrichment in detritus-based systems are not as well documented as those in autotroph-based systems. This study examined the effects of enrichment on a Southern Appalachian headwater
stream on detrital resources and associated consumers. Heterotrophic microbes, particularly fungi, may perform a keystone function in headwater streams by facilitating carbon and nutrient flow to consumers and in the processing of allochthonous organic matter. I assessed the effect of nutrient enrichment on the relative contribution of decomposers and detritivores. I also examined changes on different size fractions of organic matter resources with enrichment and relationships between microbial biomass and nutrient content. Application of the Hieber-Gessner model suggests that nutrient enrichment may cause shifts toward increasing fungal and shredder contribution to leaf litter breakdown, intensifying losses of carbon through both respiration and downstream transport. The response of CPOM (both maple and rhododendron substrates) to enrichment was primarily positive, but the response of FBOM to enrichment was unexpectedly low. Nutrient enrichment increased fungal biomass and microbial respiration and decreased C:N and C:P on CPOM substrates, suggesting a general increase in resource quality. Estimates of TERs and comparison to associated organic matter resources in each
stream suggest that enrichment may reduce P limitation for shredders while potentially increasing C limitation for collectors. In a laboratory setting, CPOM mass loss and FPOM production were highest in treatments with both fungi and elevated nutrients. Both the presence of fungi and exogenous nutrients affected the N content of CPOM, but only nutrients had an effect on P content. Although fungi increased the availability of FPOM, the combined effects of fungi and nutrients did not appear to trickle down to FPOM nutrient content during organic matter transformations. These results highlight potential mechanisms for food web shifts and pathways of carbon processing that may result from nutrient enrichment of detritus-based systems.
Advisors/Committee Members: Amy Rosemond.
Subjects/Keywords: Headwater stream
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APA (6th Edition):
Tant, C. J. (2011). Detrital carbon response to experimental enrichment and impacts on associated consumers in a headwater stream. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/tant_cynthia_j_201112_phd
Chicago Manual of Style (16th Edition):
Tant, Cynthia Janelle. “Detrital carbon response to experimental enrichment and impacts on associated consumers in a headwater stream.” 2011. Doctoral Dissertation, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/tant_cynthia_j_201112_phd.
MLA Handbook (7th Edition):
Tant, Cynthia Janelle. “Detrital carbon response to experimental enrichment and impacts on associated consumers in a headwater stream.” 2011. Web. 07 Apr 2020.
Vancouver:
Tant CJ. Detrital carbon response to experimental enrichment and impacts on associated consumers in a headwater stream. [Internet] [Doctoral dissertation]. University of Georgia; 2011. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/tant_cynthia_j_201112_phd.
Council of Science Editors:
Tant CJ. Detrital carbon response to experimental enrichment and impacts on associated consumers in a headwater stream. [Doctoral Dissertation]. University of Georgia; 2011. Available from: http://purl.galileo.usg.edu/uga_etd/tant_cynthia_j_201112_phd
University of Georgia
11.
Johnson, Brent Robert.
Effects of resource manipulation on selected primary and secondary consumers in two detritus-based southern Appalachian streams.
Degree: PhD, Entomology, 2002, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/johnson_brent_r_200212_phd
► This research was conducted in the context of a larger experiment aimed at assessing the effects of long-term litter exclusion in an Appalachian headwater stream…
(more)
▼ This research was conducted in the context of a larger experiment aimed at assessing the effects of long-term litter exclusion in an Appalachian headwater
stream ecosystem. The exclusion experiment provided an opportunity to examine effects of resource reduction on consumers. Mark-recapture and dietary studies were conducted to determine the effects of litter exclusion on the larval salamander Eurycea wilderae, a vertebrate
stream predator. Litter exclusion resulted in significantly reduced salamander density, individual growth, biomass, and production. Reduced density in the treatment
stream likely results from drift of hatchlings, whereas a dietary shift may be responsible for reduced growth. Salamanders in the treatment
stream had fewer prey per gut and switched from primarily consuming copepods to relying more on non-tanypodine midges. There was no difference in salamander movement among streams. Results from a downstream recovery reach were often intermediate for measured parameters, indicating residual effects from upstream treatment. In-situ chambers were used to measure effects of litter exclusion on growth of two dominant insect detritivore groups. Larval Tallaperla spp. were chosen as representative shredders and non-Tanypodinae Chironomidae were selected as representative collector-gatherers. Comparison of significant regression lines showed growth of both taxonomic groups were significantly lower in the litter exclusion
stream. Tallaperla spp. mortality was also higher in the treatment
stream. These results show that reduced growth is partially responsible for declines in detritivore production in the treatment
stream and that chironomid production is actually lower than previously reported. Nutrients were added to another headwater
stream to measure effects of enrichment in a detritus-based ecosystem. A mark-recapture study was conducted on larval E. wilderae to measure effects of enrichment on growth of a representative vertebrate predator. Compared to pre-treatment, growth rates were significantly higher in both reference and treatment streams during the treatment period, indicating interannual growth variation. Growth rates in the nutrient addition
stream, however, were significantly higher than the reference
stream during treatment. Larvae prey heavily on copepods and chironomids that would respond quickly to enrichment. These preliminary results indicate that enrichment in detrital systems may indirectly affect higher trophic levels in ways similar to living-plant based systems.
Advisors/Committee Members: J. Bruce Wallace.
Subjects/Keywords: Stream
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APA (6th Edition):
Johnson, B. R. (2002). Effects of resource manipulation on selected primary and secondary consumers in two detritus-based southern Appalachian streams. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/johnson_brent_r_200212_phd
Chicago Manual of Style (16th Edition):
Johnson, Brent Robert. “Effects of resource manipulation on selected primary and secondary consumers in two detritus-based southern Appalachian streams.” 2002. Doctoral Dissertation, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/johnson_brent_r_200212_phd.
MLA Handbook (7th Edition):
Johnson, Brent Robert. “Effects of resource manipulation on selected primary and secondary consumers in two detritus-based southern Appalachian streams.” 2002. Web. 07 Apr 2020.
Vancouver:
Johnson BR. Effects of resource manipulation on selected primary and secondary consumers in two detritus-based southern Appalachian streams. [Internet] [Doctoral dissertation]. University of Georgia; 2002. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/johnson_brent_r_200212_phd.
Council of Science Editors:
Johnson BR. Effects of resource manipulation on selected primary and secondary consumers in two detritus-based southern Appalachian streams. [Doctoral Dissertation]. University of Georgia; 2002. Available from: http://purl.galileo.usg.edu/uga_etd/johnson_brent_r_200212_phd
University of Georgia
12.
Cross, Wyatt Firmin.
Nutrient enrichment of a detritus-based ecosystem: effects on invertebrate community structure and function.
Degree: PhD, Ecology, 2004, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/cross_wyatt_f_200408_phd
► Nutrient enrichment of aquatic ecosystems is occurring globally as a result of anthropogenic changes to the availability and mobility of elements such as nitrogen (N)…
(more)
▼ Nutrient enrichment of aquatic ecosystems is occurring globally as a result of anthropogenic changes to the availability and mobility of elements such as nitrogen (N) and phosphorus (P). Currently, very little is known about the effects of nutrient enrichment on detritus-based ecosystems despite the prevalence and global significance of detritus in most energetic budgets. This study was aimed at quantifying effects of an experimental nitrogen and phosphorus enrichment on invertebrate consumers and basal resources in a detritus-based headwater
stream. Efforts were focused on examining nutrient-induced changes in a) the quantity and quality of detrital food resources and b) invertebrate growth rates, secondary production, food web dynamics, and stoichiometry. Enrichment had a large positive effect on the quality of basal resources (i.e., leaf litter, fine benthic organic matter, and epilithon) though increased N and P content. In contrast, the quantity of basal resources declined overall due to a significant reduction in benthic leaf litter. Both primary and secondary invertebrate consumers exhibited a positive response to enrichment through increased biomass and secondary production. However, there were large differences in response among individual taxa, which was related to an interaction between two dominant life history characteristics – larval lifespan and feeding behavior. Long-lived taxa (>1 year) showed little or no response to enrichment, whereas many short-lived taxa (<1 year) showed large positive responses to enrichment. Individual growth rates of chironomid larvae increased during enrichment, while those of Tallaperla spp. were not affected. Enrichment had no effect on the diets of consumers, but there were large effects on total organic matter flows to all functional feeding groups. Patterns of consumer stoichiometry indicated distinctly lower relative P content of detritus-based consumers in comparison to previously published data from plant- or algal-based communities. In addition, consumer P content was elevated in the treatment
stream during enrichment, demonstrating that some insect consumers are much less homeostatic than other well-studied crustaceans. These data suggest potential evolutionary adaptations of detritus-based consumers to nutrient poor food resources. This dissertation should provide a basis for predicting how landscape-scale nutrient enrichment may affect community structure, production, and material cycling in forested headwater streams.
Advisors/Committee Members: J. Bruce Wallace.
Subjects/Keywords: Stream
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APA (6th Edition):
Cross, W. F. (2004). Nutrient enrichment of a detritus-based ecosystem: effects on invertebrate community structure and function. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/cross_wyatt_f_200408_phd
Chicago Manual of Style (16th Edition):
Cross, Wyatt Firmin. “Nutrient enrichment of a detritus-based ecosystem: effects on invertebrate community structure and function.” 2004. Doctoral Dissertation, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/cross_wyatt_f_200408_phd.
MLA Handbook (7th Edition):
Cross, Wyatt Firmin. “Nutrient enrichment of a detritus-based ecosystem: effects on invertebrate community structure and function.” 2004. Web. 07 Apr 2020.
Vancouver:
Cross WF. Nutrient enrichment of a detritus-based ecosystem: effects on invertebrate community structure and function. [Internet] [Doctoral dissertation]. University of Georgia; 2004. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/cross_wyatt_f_200408_phd.
Council of Science Editors:
Cross WF. Nutrient enrichment of a detritus-based ecosystem: effects on invertebrate community structure and function. [Doctoral Dissertation]. University of Georgia; 2004. Available from: http://purl.galileo.usg.edu/uga_etd/cross_wyatt_f_200408_phd
13.
Backman, Nathan John.
C-MR: Continuous Execution of MapReduce Workflows for Stream
Processing.
Degree: PhD, Computer Science, 2013, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:320474/
► Data processing frameworks provide application programmers an interface to manipulate and analyze data. This thesis studies a novel parallel stream processing model, designed for workflow-based…
(more)
▼ Data processing frameworks provide application
programmers an interface to manipulate and analyze data. This
thesis studies a novel parallel
stream processing model, designed
for workflow-based data processing frameworks, that leverages
application performance requirements to motivate the flexible
scheduling and fine-grained allocation of data to computing nodes.
We feature this processing model through the design and
implementation of the Continuous-MapReduce (C-MR) data processing
framework. C-MR abstracts away the complexities of parallel
stream
processing and workflow scheduling while providing the simple and
familiar MapReduce programming interface with the addition of
stream window semantics. Its novel processing model enables: 1)
fine-grained, workflow-wide load balancing across computing nodes;
2) the evolving application of data and task parallelism models as
guided by application performance requirements; and 3) a novel
scheduling framework which supports gradual transitions between
scheduling policies relative to application performance and/or
resource availability.
This work explores the potential of the C-MR processing model
by studying our single-host implementation of C-MR that supports
parallel execution on non-dedicated and heterogeneous computing
nodes (both multi-core CPUs and GPUs). We then study this
processing model through the implementation of a distributed
version of C-MR that supports execution on multiple hosts. This
endeavor involved the generalizable strategy of employing
hierarchical instances of the C-MR processing model while requiring
modifications to the data acquisition and load balancing
strategies. Experimental results from these studies show that the
C-MR processing model can effectively support the continuous
execution of workflows of MapReduce jobs for
stream processing
while being resilient to
stream and resource fluctuations due to
the processing model's flexibility and diversification of
processing responsibilities.
Advisors/Committee Members: Cetintemel, Ugur (Director), Fonseca, Rodrigo (Reader), Zdonik, Stanley (Reader).
Subjects/Keywords: Stream processing
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APA (6th Edition):
Backman, N. J. (2013). C-MR: Continuous Execution of MapReduce Workflows for Stream
Processing. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:320474/
Chicago Manual of Style (16th Edition):
Backman, Nathan John. “C-MR: Continuous Execution of MapReduce Workflows for Stream
Processing.” 2013. Doctoral Dissertation, Brown University. Accessed April 07, 2020.
https://repository.library.brown.edu/studio/item/bdr:320474/.
MLA Handbook (7th Edition):
Backman, Nathan John. “C-MR: Continuous Execution of MapReduce Workflows for Stream
Processing.” 2013. Web. 07 Apr 2020.
Vancouver:
Backman NJ. C-MR: Continuous Execution of MapReduce Workflows for Stream
Processing. [Internet] [Doctoral dissertation]. Brown University; 2013. [cited 2020 Apr 07].
Available from: https://repository.library.brown.edu/studio/item/bdr:320474/.
Council of Science Editors:
Backman NJ. C-MR: Continuous Execution of MapReduce Workflows for Stream
Processing. [Doctoral Dissertation]. Brown University; 2013. Available from: https://repository.library.brown.edu/studio/item/bdr:320474/
14.
Papaemmanouil, Olga.
An Extensible Overlay Infrastructure for Wide-Area Stream
Processing and Dissemination.
Degree: PhD, Computer Science, 2009, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:76/
► The confluence of ubiquitous, high-performance networking and increased availability of online information has led to the emergence of a new class of large-scale stream processing…
(more)
▼ The confluence of ubiquitous, high-performance
networking and increased availability of online information has led
to the emergence of a new class of large-scale
stream processing
and dissemination applications. These applications often exhibit
diverse logic and performance requirements, yet they all require
common facilities, which include construction of an overlay
network, routing and processing logic, and membership management.
In contrast to existing approaches that provide custom, point
solutions to point applications, we introduce a general-purpose
infrastructure that provides these core functionalities and can be
easily extended for a broad spectrum of target applications.
Extensibility is the central design consideration for our
infrastructure, which can be customized to support diverse
processing logic,
stream types, and performance targets through a
set of methods that encapsulate application-specific behavior and a
cost model for defining the desired QoS and resource-utilization
metrics and constraints. Given these specifications, the system
automatically creates and optimizes a data
stream acquisition,
processing and dissemination overlay network. Its optimization is
driven by metric-independent operations, which can refine the
structure of the overlay network as well as efficiently distribute
processing across the network. In this dissertation, we first
describe the basic concepts and models used by our infrastructure
and present its generic optimization framework. We study different
types of optimization techniques we have developed for supporting
stream dissemination and
stream processing applications. Finally,
we evaluate the performance of our framework through results we
have obtained by a prototype deployment on the PlanetLab testbed as
well as LAN emulation and simulation experiments.
Advisors/Committee Members: Cetintemel, Ugur (director), Jannotti, John (reader), Zdonik, Stan (reader).
Subjects/Keywords: Stream Processing
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Export
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Manager
APA (6th Edition):
Papaemmanouil, O. (2009). An Extensible Overlay Infrastructure for Wide-Area Stream
Processing and Dissemination. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:76/
Chicago Manual of Style (16th Edition):
Papaemmanouil, Olga. “An Extensible Overlay Infrastructure for Wide-Area Stream
Processing and Dissemination.” 2009. Doctoral Dissertation, Brown University. Accessed April 07, 2020.
https://repository.library.brown.edu/studio/item/bdr:76/.
MLA Handbook (7th Edition):
Papaemmanouil, Olga. “An Extensible Overlay Infrastructure for Wide-Area Stream
Processing and Dissemination.” 2009. Web. 07 Apr 2020.
Vancouver:
Papaemmanouil O. An Extensible Overlay Infrastructure for Wide-Area Stream
Processing and Dissemination. [Internet] [Doctoral dissertation]. Brown University; 2009. [cited 2020 Apr 07].
Available from: https://repository.library.brown.edu/studio/item/bdr:76/.
Council of Science Editors:
Papaemmanouil O. An Extensible Overlay Infrastructure for Wide-Area Stream
Processing and Dissemination. [Doctoral Dissertation]. Brown University; 2009. Available from: https://repository.library.brown.edu/studio/item/bdr:76/
University of Notre Dame
15.
Arial Joy Shogren.
The Transport, Retention, and Fate of Novel Materials in
Flowing Waters</h1>.
Degree: PhD, Biological Sciences, 2018, University of Notre Dame
URL: https://curate.nd.edu/show/xp68kd20n8k
► Historically, stream ecology was formed on the basis of measuring how much organic matter rivers move downstream, and the “processing continuum” as this organic…
(more)
▼ Historically,
stream ecology was formed on
the basis of measuring how much organic matter rivers move
downstream, and the “processing continuum” as this organic material
is alternatively deposited, processed, and further transported. A
significant amount of material is continuously exported from
headwater streams, and via advection can be moved long distances
downstream prior to processing. Along the way, these materials
exchange rapidly between the water column and streambed, migrating
downstream in alternating deposition and resuspension events called
saltation, and are influenced by complexity in the physical and
biologically template of
stream structure. A new focus in ecology
is understanding how “novel materials” are transported, retained,
and persist in
stream and river ecosystems. Despite many potential
controls over material transport in streams and rivers, we often
treat the transport of these materials as a homogenous process in
the environment because we lack empirical observations addressing
the complexity inherent in natural systems. Therefore, the
overarching objective of my dissertation is to improve
understanding of the transport, retention, and persistence of two
novel materials that are actively transported by flowing waters
using a combination of empirical and modeling approaches, spanning
lab to watershed experimental scales. More specifically, I
investigate the dynamics and transport of two novel materials:
environmental DNA (eDNA) and a genetically modified protein
(Cry1Ab).
Advisors/Committee Members: Dr. Jennifer Tank, Research Director, Dr. Emma Rosi, Committee Member, Dr. Stuart Jones, Committee Member, Dr. Diogo Bolster, Committee Member.
Subjects/Keywords: Stream Ecology
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APA (6th Edition):
Shogren, A. J. (2018). The Transport, Retention, and Fate of Novel Materials in
Flowing Waters</h1>. (Doctoral Dissertation). University of Notre Dame. Retrieved from https://curate.nd.edu/show/xp68kd20n8k
Chicago Manual of Style (16th Edition):
Shogren, Arial Joy. “The Transport, Retention, and Fate of Novel Materials in
Flowing Waters</h1>.” 2018. Doctoral Dissertation, University of Notre Dame. Accessed April 07, 2020.
https://curate.nd.edu/show/xp68kd20n8k.
MLA Handbook (7th Edition):
Shogren, Arial Joy. “The Transport, Retention, and Fate of Novel Materials in
Flowing Waters</h1>.” 2018. Web. 07 Apr 2020.
Vancouver:
Shogren AJ. The Transport, Retention, and Fate of Novel Materials in
Flowing Waters</h1>. [Internet] [Doctoral dissertation]. University of Notre Dame; 2018. [cited 2020 Apr 07].
Available from: https://curate.nd.edu/show/xp68kd20n8k.
Council of Science Editors:
Shogren AJ. The Transport, Retention, and Fate of Novel Materials in
Flowing Waters</h1>. [Doctoral Dissertation]. University of Notre Dame; 2018. Available from: https://curate.nd.edu/show/xp68kd20n8k
University of Georgia
16.
De Jesus Crespo, Rebeca Giselle.
Stream friendly coffee: collaborating with the Rainforest Alliance to advance stream conservation in tropical agroforestry systems.
Degree: PhD, Ecology, 2015, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/de-jesus-crespo_rebeca_g_201505_phd
► Sustainability certifications are an increasingly important strategy for promoting natural resource conservation and social wellbeing, especially in the developing tropics. This dissertation addresses stream protection…
(more)
▼ Sustainability certifications are an increasingly important strategy for promoting natural resource conservation and social wellbeing, especially in the developing tropics. This dissertation addresses
stream protection within agroforestry systems in collaboration with the Rainforest Alliance (RA), one of the largest certification programs of tropical agricultural products. Our partnership focused on a) developing a protocol to monitor RA certification’s impact on
stream protection, b) gathering baseline data about the impact of streams on coffee agroforestry (one of the leading RA certified industries), and c) evaluating the effectiveness of the RA program at advancing
stream protection within coffee agroforestry. We conducted this study in Tarrazu, a high elevation, high intensity coffee growing region in Costa Rica. The results of this study suggest that streams within Tarrazu coffee agroforestry systems fall within recommended physicochemical and bio-integrity criteria for aquatic ecosystem conservation, and support high levels of diversity and pollution sensitive taxa. However, these streams also present some evidence of degradation, notably an increase proportion of certain tolerant taxa (Simuliidae and Hydropsychidae), a decrease proportion of shredder-detritivore taxa, and increases in pH, conductivity, and turbidity relative to a forested reference site. The study provides evidence of the effectiveness of RA’s certification requirement of preserving a minimum of 40% shade tree cover through the coffee plantation to mitigate some of these impacts, especially if the practice is implemented at the sub-watershed scale. This dissertation concludes with a chapter that draws from literature on research partnerships to develop an NGO-Academia collaboration framework. We illustrate the use of this framework using our experience with this project and two other examples of research partnerships involving sustainability certifications. Our contributions with this project include baseline information about
stream ecosystem response to coffee agriculture, the first empirical support of the effectiveness of one of RA’s certification requirements at advancing
stream protection, and a road map to guide future collaborative projects between academics and non-governmental organizations for science-based conservation.
Advisors/Committee Members: Catherine Pringle.
Subjects/Keywords: tropical stream conservation
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APA (6th Edition):
De Jesus Crespo, R. G. (2015). Stream friendly coffee: collaborating with the Rainforest Alliance to advance stream conservation in tropical agroforestry systems. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/de-jesus-crespo_rebeca_g_201505_phd
Chicago Manual of Style (16th Edition):
De Jesus Crespo, Rebeca Giselle. “Stream friendly coffee: collaborating with the Rainforest Alliance to advance stream conservation in tropical agroforestry systems.” 2015. Doctoral Dissertation, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/de-jesus-crespo_rebeca_g_201505_phd.
MLA Handbook (7th Edition):
De Jesus Crespo, Rebeca Giselle. “Stream friendly coffee: collaborating with the Rainforest Alliance to advance stream conservation in tropical agroforestry systems.” 2015. Web. 07 Apr 2020.
Vancouver:
De Jesus Crespo RG. Stream friendly coffee: collaborating with the Rainforest Alliance to advance stream conservation in tropical agroforestry systems. [Internet] [Doctoral dissertation]. University of Georgia; 2015. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/de-jesus-crespo_rebeca_g_201505_phd.
Council of Science Editors:
De Jesus Crespo RG. Stream friendly coffee: collaborating with the Rainforest Alliance to advance stream conservation in tropical agroforestry systems. [Doctoral Dissertation]. University of Georgia; 2015. Available from: http://purl.galileo.usg.edu/uga_etd/de-jesus-crespo_rebeca_g_201505_phd
University of Aberdeen
17.
Imholt, Christian.
Ecological significance of stream thermal regimes.
Degree: 2010, University of Aberdeen
URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=166176
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540319
► This thesis aimed to provide improved understanding of the spatial and temporal variability of stream temperature, the influence of riparian woodlands on thermal regimes and…
(more)
▼ This thesis aimed to provide improved understanding of the spatial and temporal variability of stream temperature, the influence of riparian woodlands on thermal regimes and examples of the ecological consequences of different thermal regimes. First, the spatial and temporal variability of temperature within a large montane river basin at nested spatial scales was established. It was from this analysis that (i) variation that can occur at all spatial scales was observed, (ii) different physical factors are controlling these variations at all scales, and (iii) greatest differences occur between different tributaries. The extent of riparian forestry proved to be in important factor in determining river temperatures. The results suggest that broadleaved tree species within the riparian zone are more able to reduced incoming solar radiation and consequently control stream temperature. This highlights the potential of riparian plantings in mitigation efforts against high temperatures under future climate scenarios. To complement these empirical assessments, the ecological significance of observed thermal variability was assessed in a laboratory study of the growth of juvenile Atlantic salmon. The effects of the temperature regime on growth were in the range of about 3% reduction in final length in the variable regime compared to the constant one. Relations between invertebrate growth, adult emergence patterns and thermal regime differences related to riparian cover were assessed in relation to the mayfly <i>Baetis rhodani. </i>Statistically significant differences in mean size and size distribution of Baetis were found in the Girnock, between all sites separated by no more than 5 km.
Subjects/Keywords: 577.27; Stream ecology
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Imholt, C. (2010). Ecological significance of stream thermal regimes. (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=166176 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540319
Chicago Manual of Style (16th Edition):
Imholt, Christian. “Ecological significance of stream thermal regimes.” 2010. Doctoral Dissertation, University of Aberdeen. Accessed April 07, 2020.
http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=166176 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540319.
MLA Handbook (7th Edition):
Imholt, Christian. “Ecological significance of stream thermal regimes.” 2010. Web. 07 Apr 2020.
Vancouver:
Imholt C. Ecological significance of stream thermal regimes. [Internet] [Doctoral dissertation]. University of Aberdeen; 2010. [cited 2020 Apr 07].
Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=166176 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540319.
Council of Science Editors:
Imholt C. Ecological significance of stream thermal regimes. [Doctoral Dissertation]. University of Aberdeen; 2010. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=166176 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540319
18.
Ahmad, Yanif.
Pulse: Database Support for Efficient Query Processing Of
Temporal Polynomial Models.
Degree: PhD, Computer Science, 2009, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:74/
► This thesis investigates the practicality and utility of mathematical models to represent continuous and occasionally unavailable data stream attributes, and processing relational-style queries in a…
(more)
▼ This thesis investigates the practicality and utility
of mathematical models to represent continuous and occasionally
unavailable data
stream attributes, and processing relational-style
queries in a
stream processing engine directly on these models. We
present Pulse, a framework for processing continuous queries over
stream attributes modeled as piecewise polynomial functions. We use
piece-wise polynomials to provide a compact, approximate
representation of the input dataset and provide query language
extensions for users to specify precision bounds to control this
approximation. Pulse represents queries as simultaneous equation
systems for a variety of relational operators including filters,
joins and standard aggregates. In the
stream context, we
continually solve these equation systems as new data arrives into
the system. We have implemented Pulse on top of the Borealis
stream
processing engine and evaluated it on two real-world datasets from
financial and moving object applications. Pulse is able to achieve
significant performance improvements by processing queries directly
on the mathematical representation of these polynomials, in
comparison to standard tuple-based
stream processing, thereby
demonstrating the viability of our system in the face of having to
meet precision requirements. In addition to our primary
contribution of describing the core design and architecture of
Pulse, this thesis presents a selectivity estimator and a
multi-query optimizer to scale query processing capabilities. Our
selectivity estimator uses histograms defined on a parameter space
of polynomial coefficients for estimation, passing selectivities to
our multi-query optimizer which may then determine how to construct
a global query plan that shares work across individual queries. We
evaluate these components on both a synthetic dataset and a
financial dataset. Our experiments show that our optimization
mechanisms provide significant reductions in processing overhead,
and that our estimation algorithm provides an accurate and low
overhead estimator for selective operators, that can be enhanced by
sampling, while also being a general technique that can handle
operators such as min and max aggregates, where sampling is known
to be inaccurate.
Advisors/Committee Members: Cetintemel, Ugur (director), Zdonik, Stanley (reader), Jannotti, John (reader), Madden, Samuel (reader).
Subjects/Keywords: Data stream processing
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ahmad, Y. (2009). Pulse: Database Support for Efficient Query Processing Of
Temporal Polynomial Models. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:74/
Chicago Manual of Style (16th Edition):
Ahmad, Yanif. “Pulse: Database Support for Efficient Query Processing Of
Temporal Polynomial Models.” 2009. Doctoral Dissertation, Brown University. Accessed April 07, 2020.
https://repository.library.brown.edu/studio/item/bdr:74/.
MLA Handbook (7th Edition):
Ahmad, Yanif. “Pulse: Database Support for Efficient Query Processing Of
Temporal Polynomial Models.” 2009. Web. 07 Apr 2020.
Vancouver:
Ahmad Y. Pulse: Database Support for Efficient Query Processing Of
Temporal Polynomial Models. [Internet] [Doctoral dissertation]. Brown University; 2009. [cited 2020 Apr 07].
Available from: https://repository.library.brown.edu/studio/item/bdr:74/.
Council of Science Editors:
Ahmad Y. Pulse: Database Support for Efficient Query Processing Of
Temporal Polynomial Models. [Doctoral Dissertation]. Brown University; 2009. Available from: https://repository.library.brown.edu/studio/item/bdr:74/
Brock University
19.
Meyers, Michael J.
Flow regime prediction via froude number calculation in a rock-bedded stream
.
Degree: Department of Earth Sciences, 2010, Brock University
URL: http://hdl.handle.net/10464/3073
► Mathematical predictions of flow conditions along a steep gradient rock bedded stream are examined. Stream gage discharge data and Manning's Equation are used to calculate…
(more)
▼ Mathematical predictions of flow conditions along a steep gradient rock bedded stream
are examined. Stream gage discharge data and Manning's Equation are used to calculate
alternative velocities, and subsequently Froude Numbers, assuming varying values of
velocity coefficient, full depth or depth adjusted for vertical flow separation. Comparison
of the results with photos show that Froude Numbers calculated from velocities derived
from Manning's Equation, assuming a velocity coefficient of 1.30 and full depth, most
accurately predict flow conditions, when supercritical flow is defined as Froude Number
values above 0.84. Calculated Froude Number values between 0.8 and 1.1 correlate well
with observed transitional flow, defined as the first appearance of small diagonal waves.
Transitions from subcritical through transitional to clearly supercritical flow are
predictable. Froude Number contour maps reveal a sinuous rise and fall of values
reminiscent of pool riffle energy distribution.
Subjects/Keywords: Stream measurements;
Streamflow
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APA (6th Edition):
Meyers, M. J. (2010). Flow regime prediction via froude number calculation in a rock-bedded stream
. (Thesis). Brock University. Retrieved from http://hdl.handle.net/10464/3073
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Meyers, Michael J. “Flow regime prediction via froude number calculation in a rock-bedded stream
.” 2010. Thesis, Brock University. Accessed April 07, 2020.
http://hdl.handle.net/10464/3073.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Meyers, Michael J. “Flow regime prediction via froude number calculation in a rock-bedded stream
.” 2010. Web. 07 Apr 2020.
Vancouver:
Meyers MJ. Flow regime prediction via froude number calculation in a rock-bedded stream
. [Internet] [Thesis]. Brock University; 2010. [cited 2020 Apr 07].
Available from: http://hdl.handle.net/10464/3073.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Meyers MJ. Flow regime prediction via froude number calculation in a rock-bedded stream
. [Thesis]. Brock University; 2010. Available from: http://hdl.handle.net/10464/3073
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
California State University – East Bay
20.
Beitz, Pamela.
A Multi-Tiered Catchment Analysis of Upper Redwood Creek, an Urban, Trout Bearing Stream.
Degree: 2013, California State University – East Bay
URL: http://hdl.handle.net/10211.3/48185
► Upper Redwood Creek watershed (596 acres or 241 hectares) in Oakland, CA is an urban park with high recreational use that supports the spawning and…
(more)
▼ Upper Redwood Creek watershed (596 acres or 241 hectares) in Oakland, CA is
an urban park with high recreational use that supports the spawning and rearing of native
rainbow trout. This research combines tracer studies (??[superscript]18 O, TDS and temperature) with
hydrometric and GIS analysis to develop a conceptual model of the surface and
subsurface hydrologic regimes for future
stream restoration.
Stream flow and
precipitation data were manually collected to provide basic hydrometric data for this
previously ungaged watershed during the water year 2010/11. The use of multiple
methods of analysis and manual data collection provides examples of a variety of
analytical tools for small government, non-profit, and citizen groups involved in future
restoration.
Mean discharge for 2010/11 was 2.63 cubic feet per second (0.075 cubic meters
per second) with a maximum measured discharge of 91 cubic feet per second (2.58 cubic
meters per second). Precipitation of 43.5 inches (1,105 millimeters) was well above the
annual average of 27.48 inches (698 millimeters) and exhibited substantial variation in
??[superscript]18 O signals, from -2.15 to -18.36 ???, with a volume-weighted mean of -9.69 ??? (SD
4.04, amplitude 8.3 ???).
Stream flow ??[superscript]18 O, with a discharge-weighted mean of -6.80 ???
(SD 0.64, amplitude 1.84 ???) was considerably damped compared to precipitation input.
??[superscript]18 O tracer estimates on the event and annual scale indicate 60 to 77 percent groundwater
contribution. TDS estimates of groundwater inflow contribution display comparable
agreement while temperature estimates differ significantly.
Tracer mixing plots, however, illustrate tracer affinity to differing reservoirs of
groundwater and the utility of multiple tracers to quantify variably-aged water masses in
the subsurface. ??[superscript]18 O tracer analysis suggests a large volume of groundwater contribution
to annual
stream flow with a relatively short mean residence time (MRT) while
temperature analysis indicates smaller groundwater volume contributing to annual
stream
flow with a longer MRT. Temperature analysis on the reach scale suggests that
substantial groundwater inflow exerts more control on damping
stream temperature than
canopy cover. Sine wave/exponential mixing model derived MRTs for the URC and its
subcatchments range from 0.12 to 0.64 decimal years. Landscape features paired with
MRT suggests that catchment size, geology, and forested cover have the strongest
correlation to flow path length and residence time. Steep slopes demonstrate a weak
positive correlation to MRT.
This study reveals that this steeply sloped watershed has significant groundwater
resources and perennial flow in upper reaches due to high fracture density, porous
geology and forest cover. Multi-tracer analysis adds dimensionality to this conceptual
model, characterizing groundwater contributions of new water at 20 to 30 percent,
intermediate aged water at 60 to 70 percent and deeper, and older water at two to five…
Advisors/Committee Members: Strayer, Dr. Luther M. (advisor), Moran, Dr. Jean E. (primaryAdvisor).
Subjects/Keywords: Stream ecology – California
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APA ·
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MLA ·
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Manager
APA (6th Edition):
Beitz, P. (2013). A Multi-Tiered Catchment Analysis of Upper Redwood Creek, an Urban, Trout Bearing Stream. (Thesis). California State University – East Bay. Retrieved from http://hdl.handle.net/10211.3/48185
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Beitz, Pamela. “A Multi-Tiered Catchment Analysis of Upper Redwood Creek, an Urban, Trout Bearing Stream.” 2013. Thesis, California State University – East Bay. Accessed April 07, 2020.
http://hdl.handle.net/10211.3/48185.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Beitz, Pamela. “A Multi-Tiered Catchment Analysis of Upper Redwood Creek, an Urban, Trout Bearing Stream.” 2013. Web. 07 Apr 2020.
Vancouver:
Beitz P. A Multi-Tiered Catchment Analysis of Upper Redwood Creek, an Urban, Trout Bearing Stream. [Internet] [Thesis]. California State University – East Bay; 2013. [cited 2020 Apr 07].
Available from: http://hdl.handle.net/10211.3/48185.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Beitz P. A Multi-Tiered Catchment Analysis of Upper Redwood Creek, an Urban, Trout Bearing Stream. [Thesis]. California State University – East Bay; 2013. Available from: http://hdl.handle.net/10211.3/48185
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Montana Tech
21.
Stanley, Andrea.
Hydrologic Conditions and Streamflow Change in an Evolving Semi-Arid Agricultural Watershed, Smith River, Montana.
Degree: MS, 2013, Montana Tech
URL: https://scholarworks.umt.edu/etd/1378
► Agricultural land and water use has modified natural flow regimes in the western US. Understanding the effect of agricultural water use on streamflow is critical…
(more)
▼ Agricultural land and water use has modified natural flow regimes in the western US. Understanding the effect of agricultural water use on streamflow is critical to effective water management and is often limited by the available data record. This investigation evaluates agricultural water use and streamflow in the Smith River watershed (SRW), a semi-arid agricultural watershed located on the eastern slope of the northern Rocky Mountains in west-central Montana. Questions motivating this study include: (1) Has agricultural water use modified streamflow on the Smith River? (2) What aspect of agricultural activity in the Smith River watershed is having the greatest effect on streamflow? (3) What hydrologic properties of the watershed determine streamflow sensitivity to agricultural land and water use? Three approaches are employed to address these questions: (1) construction of an annual water budget, (2) comparison of streamflow to current and historic agricultural water use intensity, and (3) simulation of watershed processes using a precipitation-runoff model. Based on the mean-annual water budget estimate of the SRW, 12 percent of mean-annual streamflow in the Smith River is consumed by irrigation water use. The hydrologic effects of increased irrigated area detected with linear regression analyses of streamflow and agricultural water use include decreased seasonal flows in April, May, and June; increased late-summer flows in August and September; and increased low-flow volumes. Numerical hydrologic model simulations demonstrate that dominant precipitation-runoff processes in the watershed cannot be adequately represented without including agricultural water use.
Subjects/Keywords: PRMS; stream flow
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MLA ·
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Manager
APA (6th Edition):
Stanley, A. (2013). Hydrologic Conditions and Streamflow Change in an Evolving Semi-Arid Agricultural Watershed, Smith River, Montana. (Masters Thesis). Montana Tech. Retrieved from https://scholarworks.umt.edu/etd/1378
Chicago Manual of Style (16th Edition):
Stanley, Andrea. “Hydrologic Conditions and Streamflow Change in an Evolving Semi-Arid Agricultural Watershed, Smith River, Montana.” 2013. Masters Thesis, Montana Tech. Accessed April 07, 2020.
https://scholarworks.umt.edu/etd/1378.
MLA Handbook (7th Edition):
Stanley, Andrea. “Hydrologic Conditions and Streamflow Change in an Evolving Semi-Arid Agricultural Watershed, Smith River, Montana.” 2013. Web. 07 Apr 2020.
Vancouver:
Stanley A. Hydrologic Conditions and Streamflow Change in an Evolving Semi-Arid Agricultural Watershed, Smith River, Montana. [Internet] [Masters thesis]. Montana Tech; 2013. [cited 2020 Apr 07].
Available from: https://scholarworks.umt.edu/etd/1378.
Council of Science Editors:
Stanley A. Hydrologic Conditions and Streamflow Change in an Evolving Semi-Arid Agricultural Watershed, Smith River, Montana. [Masters Thesis]. Montana Tech; 2013. Available from: https://scholarworks.umt.edu/etd/1378
University of Illinois – Urbana-Champaign
22.
Zobel, Zachary T.
Investigating the link between Arctic sea ice, North Pacific geopotential height anomalies, and precipitation across the United States.
Degree: MS, Atmospheric Sciences, 2015, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/89264
► New evidence is presented to show that decreasing sea ice in the Arctic is causing an increased amplification of the jet stream off the west…
(more)
▼ New evidence is presented to show that decreasing sea ice in the Arctic is causing an increased amplification of the jet
stream off the west coast of the United States. We find a statistically significant relationship between sea ice north of Alaska and geopotential height anomalies during the following winter and spring months. We also show that these semi-persistent height anomalies are increasing in frequency in these locations independent of long term ocean cycles, such as ENSO and PDO. These height anomalies cause more persistent precipitation patterns to certain regions of the United States and we discuss these teleconnections as well as their impacts. These results suggest that as the Arctic, specifically the region north of Alaska, continues to decrease in sea ice coverage a more persistent ridge will form in areas adjacent to this location and affect storm track to the continental United States.
Advisors/Committee Members: Wuebbles, Donald (advisor).
Subjects/Keywords: jet stream amplification
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APA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zobel, Z. T. (2015). Investigating the link between Arctic sea ice, North Pacific geopotential height anomalies, and precipitation across the United States. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/89264
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zobel, Zachary T. “Investigating the link between Arctic sea ice, North Pacific geopotential height anomalies, and precipitation across the United States.” 2015. Thesis, University of Illinois – Urbana-Champaign. Accessed April 07, 2020.
http://hdl.handle.net/2142/89264.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zobel, Zachary T. “Investigating the link between Arctic sea ice, North Pacific geopotential height anomalies, and precipitation across the United States.” 2015. Web. 07 Apr 2020.
Vancouver:
Zobel ZT. Investigating the link between Arctic sea ice, North Pacific geopotential height anomalies, and precipitation across the United States. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2015. [cited 2020 Apr 07].
Available from: http://hdl.handle.net/2142/89264.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zobel ZT. Investigating the link between Arctic sea ice, North Pacific geopotential height anomalies, and precipitation across the United States. [Thesis]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/89264
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Montana State University
23.
Junker, James Robert.
Trophic basis of invertebrate production in a Northern Rockies stream with recent willow recovery.
Degree: MS, College of Letters & Science, 2011, Montana State University
URL: https://scholarworks.montana.edu/xmlui/handle/1/1596
► Ecologists have long recognized that ecosystems are not isolated in the landscape and can receive inputs of energy, materials, and organisms from beyond their boundaries.…
(more)
▼ Ecologists have long recognized that ecosystems are not isolated in the landscape and can receive inputs of energy, materials, and organisms from beyond their boundaries. The role of these inputs for consumers in receiving ecosystems depends on biotic and abiotic characteristics of both the donor and recipient ecosystems. In streams, the influence of leaf litter input from terrestrial environments on
stream structure and function has received much study. Recently, riparian vegetation in Yellowstone National Park has undergone increases in growth and distribution in many areas, however the implications for food webs of adjacent
stream ecosystems has remained unexplored. In this study, we combined stable isotope ratios of food web components with estimates of invertebrate secondary production to measure the relative importance of terrestrial organic matter and algae to
stream invertebrate production. We found stable isotope ratios of terrestrial litter were relatively constant throughout the annual cycle. In contrast, algae showed varying patterns of enrichment and depletion likely driven by changes in light, discharge, and sources of dissolved carbon and nitrogen. Mean annual secondary production was 7.5 g AFDM m -² y -¹ (95% CI; 7.0-8.2), and the majority of this production was supported by
stream algae (58%; terrestrial detritus supported 42%). Invertebrate production varied seasonally, with >50% of annual production occurring between July and September. Relatively high quality algae supported the majority of production during this critical growth period characterized by warm temperatures and high NPP. Terrestrial litter supported the majority of invertebrate production (57%) during cold months between October and May, when
stream NPP and metabolic demands of invertebrate consumers were low. Our findings demonstrate that high quality resources support invertebrate production during periods of high metabolic demand, while terrestrial litter provides an abundant resource to support invertebrate consumer production when higher quality resources are scarce and metabolism is reduced. This study provides a quantitative measure of the importance of allochthonous and autochthonous resources to an invertebrate community of a northern Rocky Mountain
stream, and provides a benchmark to assess the potential impacts of changing riparian vegetation on streams within the northern Rocky Mountains.
Advisors/Committee Members: Chairperson, Graduate Committee: Wyatt F. Cross. (advisor).
Subjects/Keywords: Stream ecology.; Willows.
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Manager
APA (6th Edition):
Junker, J. R. (2011). Trophic basis of invertebrate production in a Northern Rockies stream with recent willow recovery. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/1596
Chicago Manual of Style (16th Edition):
Junker, James Robert. “Trophic basis of invertebrate production in a Northern Rockies stream with recent willow recovery.” 2011. Masters Thesis, Montana State University. Accessed April 07, 2020.
https://scholarworks.montana.edu/xmlui/handle/1/1596.
MLA Handbook (7th Edition):
Junker, James Robert. “Trophic basis of invertebrate production in a Northern Rockies stream with recent willow recovery.” 2011. Web. 07 Apr 2020.
Vancouver:
Junker JR. Trophic basis of invertebrate production in a Northern Rockies stream with recent willow recovery. [Internet] [Masters thesis]. Montana State University; 2011. [cited 2020 Apr 07].
Available from: https://scholarworks.montana.edu/xmlui/handle/1/1596.
Council of Science Editors:
Junker JR. Trophic basis of invertebrate production in a Northern Rockies stream with recent willow recovery. [Masters Thesis]. Montana State University; 2011. Available from: https://scholarworks.montana.edu/xmlui/handle/1/1596
Penn State University
24.
Carroll, Samuel.
Managing Stable Waterways at Bridges in the Mid-Atlantic.
Degree: 2017, Penn State University
URL: https://etda.libraries.psu.edu/catalog/14793snc5178
► In this study, a methodology is developed for creating stable channel transitions at bridge stream intersections. A methodology is developed to assess the level of…
(more)
▼ In this study, a methodology is developed for creating stable channel transitions at bridge
stream intersections. A methodology is developed to assess the level of success of a channel transition project based on the projects attainment of a multi-criteria definition of a successful transition. In addition, the methodology guides the design type selection process for new construction. For existing channel transitions, the assessment method provides an objective way of rating the ability of a channel transition project to address the complexities presented at a site. The design type selection methodology guides the designer to select a design that addresses the instabilities identified in a rapid channel stability assessment. The rapid channel stability assessment is also used to identify bridge crossings where do nothing is a potentially valid solution. Once a design type is selected, the designer can check for trends in potential for sediment mobilization or deposition using a velocity ratio analysis, and to identify design weaknesses through a design failure modes and effects analysis. Based on the sites included in this study this methodology aptly assesses existing transitions and provides valuable input to decision makers considering constructing transitions at existing or new bridges. Based on the sample of bridges in this study, do nothing is a potentially valid solution when the stability analysis results in a rating of excellent or good. This methodology can be applied to existing and new bridges and at locations both within and outside of the Mid-Atlantic.
Advisors/Committee Members: Dr. Peggy Johnson, Thesis Advisor.
Subjects/Keywords: stream crossings; stream stability; channel stability; bridge crossings; bridges; stream assessments
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APA (6th Edition):
Carroll, S. (2017). Managing Stable Waterways at Bridges in the Mid-Atlantic. (Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/14793snc5178
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Carroll, Samuel. “Managing Stable Waterways at Bridges in the Mid-Atlantic.” 2017. Thesis, Penn State University. Accessed April 07, 2020.
https://etda.libraries.psu.edu/catalog/14793snc5178.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Carroll, Samuel. “Managing Stable Waterways at Bridges in the Mid-Atlantic.” 2017. Web. 07 Apr 2020.
Vancouver:
Carroll S. Managing Stable Waterways at Bridges in the Mid-Atlantic. [Internet] [Thesis]. Penn State University; 2017. [cited 2020 Apr 07].
Available from: https://etda.libraries.psu.edu/catalog/14793snc5178.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Carroll S. Managing Stable Waterways at Bridges in the Mid-Atlantic. [Thesis]. Penn State University; 2017. Available from: https://etda.libraries.psu.edu/catalog/14793snc5178
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Victoria University of Wellington
25.
McCarthy, Lisa.
Depositional environment of the Branch Sandstone and correlative sequences: Late Cretaceous changes in relative sea level in the East Coast Basin of New Zealand.
Degree: 2018, Victoria University of Wellington
URL: http://hdl.handle.net/10063/7807
► The Branch Sandstone is located within an overall transgressive, marine sedimentary succession in Marlborough, on the East Coast of New Zealand’s South Island. It has…
(more)
▼ The Branch Sandstone is located within an overall transgressive, marine sedimentary succession in Marlborough, on the East Coast of New Zealand’s South Island. It has previously been interpreted as an anomalous sedimentary unit that was inferred to indicate abrupt and dramatic shallowing. The development of a presumed short-lived regressive deposit was thought to reflect a change in relative sea level, which had significant implications for the geological history of the Marlborough region, and regionally for the East Coast Basin.
The distribution and lithology of Branch Sandstone is described in detail from outcrop studies at Branch
Stream, and through the compilation of existing regional data. Two approximately correlative sections from the East Coast of the North Island (Tangaruhe
Stream and Angora
Stream) are also examined to provide regional context. Depositional environments were interpreted using sedimentology and palynology, and age control was developed from dinoflagellate biostratigraphy. Data derived from these methods were combined with the work of previous authors to establish depositional models for each section which were then interpreted in the context of relative sea level fluctuations.
At Branch
Stream, Branch Sandstone is interpreted as a shelfal marine sandstone, that disconformably overlies Herring Formation. The Branch Sandstone is interpreted as a more distal deposit than uppermost Herring Formation, whilst the disconformity is suggested to have developed during a fall in relative sea level. At Branch
Stream, higher frequency tectonic or eustatic sea-level changes can therefore be distinguished within a passive margin sedimentary sequence, where sedimentation broadly reflects subsidence following rifting of the Tasman Sea. Development of a long-lived disconformity at Tangaruhe
Stream and deposition of sediment gravity flow deposits at Angora
Stream occurred at similar times to the fall in relative sea level documented at the top of the Herring Formation at Branch
Stream. These features may reflect a basin-wide relative sea-level event, that coincides with global records of eustatic sea level fall.
Advisors/Committee Members: Crampton, James, Hannah, Michael.
Subjects/Keywords: Branch Stream; Tangaruhe Stream; Angora Stream; Branch Sandstone; dinoflagellate biostratigraphy
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Manager
APA (6th Edition):
McCarthy, L. (2018). Depositional environment of the Branch Sandstone and correlative sequences: Late Cretaceous changes in relative sea level in the East Coast Basin of New Zealand. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/7807
Chicago Manual of Style (16th Edition):
McCarthy, Lisa. “Depositional environment of the Branch Sandstone and correlative sequences: Late Cretaceous changes in relative sea level in the East Coast Basin of New Zealand.” 2018. Masters Thesis, Victoria University of Wellington. Accessed April 07, 2020.
http://hdl.handle.net/10063/7807.
MLA Handbook (7th Edition):
McCarthy, Lisa. “Depositional environment of the Branch Sandstone and correlative sequences: Late Cretaceous changes in relative sea level in the East Coast Basin of New Zealand.” 2018. Web. 07 Apr 2020.
Vancouver:
McCarthy L. Depositional environment of the Branch Sandstone and correlative sequences: Late Cretaceous changes in relative sea level in the East Coast Basin of New Zealand. [Internet] [Masters thesis]. Victoria University of Wellington; 2018. [cited 2020 Apr 07].
Available from: http://hdl.handle.net/10063/7807.
Council of Science Editors:
McCarthy L. Depositional environment of the Branch Sandstone and correlative sequences: Late Cretaceous changes in relative sea level in the East Coast Basin of New Zealand. [Masters Thesis]. Victoria University of Wellington; 2018. Available from: http://hdl.handle.net/10063/7807
University of Minnesota
26.
Kocian, Matthew James.
Assessing the accuracy of GIS-derived stream length and
slope estimates.
Degree: MS, Conservation biology, 2012, University of Minnesota
URL: http://purl.umn.edu/143829
► University of Minnesota M.S. thesis. Decembrt 2012. Major: Conservation biology. Advisor: Bruce Vondracek. 1 computer file (PDF); v, 81 pages.
Stream slope is a critical…
(more)
▼ University of Minnesota M.S. thesis. Decembrt 2012.
Major: Conservation biology. Advisor: Bruce Vondracek. 1 computer
file (PDF); v, 81 pages.
Stream slope is a critical component in lotic
systems research. It is commonly associated with fish and
invertebrate distribution, and is prominently used in many stream
classification schemes. Stream slope is also required to compute
other stream variables, such as stream power, a fundamental
component in stream sediment dynamics. Due to its importance,
stream slope is regularly estimated remotely using a Geographic
Information System (GIS). However, the accuracy of GIS-derived
stream slope estimates is not well established, especially in
low-slope regions. Additionally, little is known about variables
that may influence the accuracy of GIS-derived slope estimates. In
this study, the accuracy of eight GIS methods for estimating stream
slope was evaluated by comparison to "true" field-surveyed values.
Several novel GIS methods for estimating stream slope are
presented. Five stream variables were assessed for their
contribution to error in GIS-derived stream slope estimates. To
demonstrate practical applicability, GIS-derived stream slope
estimates were used to calculate stream power. GIS-derived stream
slope estimates produced using 1:24,000 USGS topographic maps and
Light Detection and Ranging (LiDAR) Digital Elevation Models (DEMs)
were most accurate. Estimates derived from 1- and 1/3-Arc Second
National Elevation Dataset DEMs were less accurate. The application
of a focal statistics tool to LiDAR-derived DEMs improved stream
slope estimate accuracy. Consistent sources of error in GIS stream
slope estimates were not identified. The utility of GIS-derived
stream slope estimates was demonstrated by presenting an
association between stream power and depth of fine
sediment.
Advisors/Committee Members: Bruce Vondracek.
Subjects/Keywords: Geographic Information System; GIS; Method accuracy; Stream gradient; Stream power; Stream slope
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Manager
APA (6th Edition):
Kocian, M. J. (2012). Assessing the accuracy of GIS-derived stream length and
slope estimates. (Masters Thesis). University of Minnesota. Retrieved from http://purl.umn.edu/143829
Chicago Manual of Style (16th Edition):
Kocian, Matthew James. “Assessing the accuracy of GIS-derived stream length and
slope estimates.” 2012. Masters Thesis, University of Minnesota. Accessed April 07, 2020.
http://purl.umn.edu/143829.
MLA Handbook (7th Edition):
Kocian, Matthew James. “Assessing the accuracy of GIS-derived stream length and
slope estimates.” 2012. Web. 07 Apr 2020.
Vancouver:
Kocian MJ. Assessing the accuracy of GIS-derived stream length and
slope estimates. [Internet] [Masters thesis]. University of Minnesota; 2012. [cited 2020 Apr 07].
Available from: http://purl.umn.edu/143829.
Council of Science Editors:
Kocian MJ. Assessing the accuracy of GIS-derived stream length and
slope estimates. [Masters Thesis]. University of Minnesota; 2012. Available from: http://purl.umn.edu/143829
University of Cambridge
27.
Baker, Narelle Paula Marie.
The influence of subglacial hydrology on the flow of West Antarctic ice streams.
Degree: PhD, 2012, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/242375
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549912
► Subglacial hydrology is known to influence the flow of ice. However, difficulty in accessing the base of large ice sheets has made determining the interaction…
(more)
▼ Subglacial hydrology is known to influence the flow of ice. However, difficulty in accessing the base of large ice sheets has made determining the interaction between ice streams, basal sediment and water difficult to discern. The aim of this thesis is to determine the influence of subglacial hydrology on the flow of the West Antarctic ice streams. This is achieved through development of a numerical flowline model, the Hydrology, Ice and Till (HIT) model. Ice thermodynamics are coupled to a till layer of Coulomb plastic rheology. The porosity of the till changes with basal melt and freeze and can be augmented by water transported through a subglacial conduit system. Water availability strongly affects ice flow, as till porosity influences the till failure strength and thereby the basal resistance of the ice. The model was developed in four stages and a number of sensitivity tests were performed. It was then applied to Kamb Ice Stream (Ice Stream C) and Whillians Ice Stream (Ice Stream B), West Antarctica. Results confirm that ice streams are capable of oscillating between fast and slow velocity states. Cycles are generated at the grounding line of an ice stream and the speed of the transition from slow to fast flow is governed by water availability. The period of oscillation of the cycles for the West Antarctic ice streams was found to be several hundred years, which is in line with observations of stagnation and reactivation of these ice streams. This shows that subglacial hydrology has a role in modulating the flow variability of ice streams and that rather large changes in the flow of the West Antarctic ice streams are likely to occur this century.
Subjects/Keywords: 551.48; Ice stream; Antarctica; Hydrology; Subglacial; Numerical model; Kamb Ice Stream; Whillans Ice Stream
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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Manager
APA (6th Edition):
Baker, N. P. M. (2012). The influence of subglacial hydrology on the flow of West Antarctic ice streams. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/242375 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549912
Chicago Manual of Style (16th Edition):
Baker, Narelle Paula Marie. “The influence of subglacial hydrology on the flow of West Antarctic ice streams.” 2012. Doctoral Dissertation, University of Cambridge. Accessed April 07, 2020.
https://www.repository.cam.ac.uk/handle/1810/242375 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549912.
MLA Handbook (7th Edition):
Baker, Narelle Paula Marie. “The influence of subglacial hydrology on the flow of West Antarctic ice streams.” 2012. Web. 07 Apr 2020.
Vancouver:
Baker NPM. The influence of subglacial hydrology on the flow of West Antarctic ice streams. [Internet] [Doctoral dissertation]. University of Cambridge; 2012. [cited 2020 Apr 07].
Available from: https://www.repository.cam.ac.uk/handle/1810/242375 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549912.
Council of Science Editors:
Baker NPM. The influence of subglacial hydrology on the flow of West Antarctic ice streams. [Doctoral Dissertation]. University of Cambridge; 2012. Available from: https://www.repository.cam.ac.uk/handle/1810/242375 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549912
University of Minnesota
28.
Kocian, Matthew James.
Assessing the accuracy of GIS-derived stream length and slope estimates.
Degree: MS, Conservation biology, 2012, University of Minnesota
URL: http://purl.umn.edu/143829
► Stream slope is a critical component in lotic systems research. It is commonly associated with fish and invertebrate distribution, and is prominently used in many…
(more)
▼ Stream slope is a critical component in lotic systems research. It is commonly associated with fish and invertebrate distribution, and is prominently used in many stream classification schemes. Stream slope is also required to compute other stream variables, such as stream power, a fundamental component in stream sediment dynamics. Due to its importance, stream slope is regularly estimated remotely using a Geographic Information System (GIS). However, the accuracy of GIS-derived stream slope estimates is not well established, especially in low-slope regions. Additionally, little is known about variables that may influence the accuracy of GIS-derived slope estimates.
In this study, the accuracy of eight GIS methods for estimating stream slope was evaluated by comparison to "true" field-surveyed values. Several novel GIS methods for estimating stream slope are presented. Five stream variables were assessed for their contribution to error in GIS-derived stream slope estimates. To demonstrate practical applicability, GIS-derived stream slope estimates were used to calculate stream power.
GIS-derived stream slope estimates produced using 1:24,000 USGS topographic maps and Light Detection and Ranging (LiDAR) Digital Elevation Models (DEMs) were most accurate. Estimates derived from 1- and 1/3-Arc Second National Elevation Dataset DEMs were less accurate. The application of a focal statistics tool to LiDAR-derived DEMs improved stream slope estimate accuracy. Consistent sources of error in GIS stream slope estimates were not identified. The utility of GIS-derived stream slope estimates was demonstrated by presenting an association between stream power and depth of fine sediment.
Subjects/Keywords: Geographic Information System; GIS; Method accuracy; Stream gradient; Stream power; Stream slope
Record Details
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Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kocian, M. J. (2012). Assessing the accuracy of GIS-derived stream length and slope estimates. (Masters Thesis). University of Minnesota. Retrieved from http://purl.umn.edu/143829
Chicago Manual of Style (16th Edition):
Kocian, Matthew James. “Assessing the accuracy of GIS-derived stream length and slope estimates.” 2012. Masters Thesis, University of Minnesota. Accessed April 07, 2020.
http://purl.umn.edu/143829.
MLA Handbook (7th Edition):
Kocian, Matthew James. “Assessing the accuracy of GIS-derived stream length and slope estimates.” 2012. Web. 07 Apr 2020.
Vancouver:
Kocian MJ. Assessing the accuracy of GIS-derived stream length and slope estimates. [Internet] [Masters thesis]. University of Minnesota; 2012. [cited 2020 Apr 07].
Available from: http://purl.umn.edu/143829.
Council of Science Editors:
Kocian MJ. Assessing the accuracy of GIS-derived stream length and slope estimates. [Masters Thesis]. University of Minnesota; 2012. Available from: http://purl.umn.edu/143829
University of Georgia
29.
Rees, Melanie Lynn.
Patterns for children's play in revitalized urban streams.
Degree: MLA, Landscape Architecture, 2001, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/rees_melanie_l_200112_mla
► Children’s play spaces in urban environments often offer no exposure to or interaction with water or other natural elements. Urban streams are typically degraded and…
(more)
▼ Children’s play spaces in urban environments often offer no exposure to or interaction with water or other natural elements. Urban streams are typically degraded and polluted. The restoration of streams in the urban environment can improve urban ecology and hydrology and provide places for children to safely play and experience nature in the city. This thesis explores the possibilities of play in urban streams through patterns of children’s play with water. Each pattern is identified and defined graphically and with specific design criteria. The patterns are applied to a design for a portion of Tanyard Creek in Athens, Georgia.
Advisors/Committee Members: Marguerite Koepke.
Subjects/Keywords: Stream restoration
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Manager
APA (6th Edition):
Rees, M. L. (2001). Patterns for children's play in revitalized urban streams. (Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/rees_melanie_l_200112_mla
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rees, Melanie Lynn. “Patterns for children's play in revitalized urban streams.” 2001. Thesis, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/rees_melanie_l_200112_mla.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rees, Melanie Lynn. “Patterns for children's play in revitalized urban streams.” 2001. Web. 07 Apr 2020.
Vancouver:
Rees ML. Patterns for children's play in revitalized urban streams. [Internet] [Thesis]. University of Georgia; 2001. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/rees_melanie_l_200112_mla.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rees ML. Patterns for children's play in revitalized urban streams. [Thesis]. University of Georgia; 2001. Available from: http://purl.galileo.usg.edu/uga_etd/rees_melanie_l_200112_mla
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Georgia
30.
STALLCUP, LINDSAY ANN.
Effects of water chemistry and leaf species on leaf breakdown in neotropical headwater streams.
Degree: MS, Ecology, 2004, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/stallcup_lindsay_a_200408_ms
► Stream ecosystem function is dependent on organic matter inputs from surrounding forests. The rate of leaf breakdown is determined by stream water quality, such as…
(more)
▼ Stream ecosystem function is dependent on organic matter inputs from surrounding forests. The rate of leaf breakdown is determined by
stream water quality, such as prevailing nutrient concentrations, as well as characteristics of organic matter. We tested the effects of phosphorus (P) in driving leaf breakdown processes in headwater streams draining La Selva Biological Station, Costa Rica. We also tested the hypothesis that at high P concentrations, dissolved inorganic nitrogen (N) becomes secondarily limiting. Finally, we predicted that breakdown of leaves with relatively higher %N (Trema integerrima) would occur more rapidly than breakdown of leaves with relatively lower %N (Ficus insipida). Leaves were incubated in litter bags in two streams: a whole-
stream P-enrichment experiment (>200 µg SRP L-1), and a reference
stream with naturally low P concentrations (~10 µg SRP L-1). To achieve localized N-enrichment, fertilizer was added upstream of half of the litter bags. Results suggest P effects on leaf breakdown, fungal biomass, microbial respiration, leaf chemistry, and insect abundance. Our short-term N addition had no effect on any of the variables measured, indicating that N is probably not limiting in high-P streams draining La Selva. Leaves with higher %N exhibited faster breakdown, higher microbial respiration, and supported a higher abundance of invertebrates, suggesting that differences in leaf N content may be important in determining colonization by microbes and invertebrates, and subsequent leaf breakdown.
Advisors/Committee Members: Catherine M. Pringle.
Subjects/Keywords: Stream ecology
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
STALLCUP, L. A. (2004). Effects of water chemistry and leaf species on leaf breakdown in neotropical headwater streams. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/stallcup_lindsay_a_200408_ms
Chicago Manual of Style (16th Edition):
STALLCUP, LINDSAY ANN. “Effects of water chemistry and leaf species on leaf breakdown in neotropical headwater streams.” 2004. Masters Thesis, University of Georgia. Accessed April 07, 2020.
http://purl.galileo.usg.edu/uga_etd/stallcup_lindsay_a_200408_ms.
MLA Handbook (7th Edition):
STALLCUP, LINDSAY ANN. “Effects of water chemistry and leaf species on leaf breakdown in neotropical headwater streams.” 2004. Web. 07 Apr 2020.
Vancouver:
STALLCUP LA. Effects of water chemistry and leaf species on leaf breakdown in neotropical headwater streams. [Internet] [Masters thesis]. University of Georgia; 2004. [cited 2020 Apr 07].
Available from: http://purl.galileo.usg.edu/uga_etd/stallcup_lindsay_a_200408_ms.
Council of Science Editors:
STALLCUP LA. Effects of water chemistry and leaf species on leaf breakdown in neotropical headwater streams. [Masters Thesis]. University of Georgia; 2004. Available from: http://purl.galileo.usg.edu/uga_etd/stallcup_lindsay_a_200408_ms
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Open Access Theses and Dissertations