Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Trophic dynamics"”.
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TROPHIC DYNAMICS OF THE LAKE SUPERIOR FISH COMMUNITY
… introduction of several nonnative species. The trophic linkages and ecological requirements of the entire fish community, including predators and prey fishes, has not been assessed on a whole-lake scale in over a decade. Here, I investigated the trophic dynamics across multiple regions of the …
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Trophic dynamics in Australian seagrass beds : unravelling linkages from nutrients to fish
The study of food webs and trophic dynamics has been a major endeavour for biologists for over half a century. The major aim of trophic ecology has been to explain the complex structures and interaction of food webs using simple models and generalities. A key debate in this research field has been …
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A theoretical and empirical consideration of trophic dynamics in some Kansas farm ponds
Digitized by Kansas Correctional Industries
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A theoretical and empirical consideration of trophic dynamics in some Kansas farm ponds
Digitized by Kansas Correctional Industries
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Movement Ecology and Trophic Dynamics in the northern Gulf of Mexico: Implications for Fisheries Management
… and recreational fisheries ranging from low-trophic-level species, such as penaeid shrimps and forage fishes, to high-trophic-level predators (e.g. Yellowfin Tuna). This thesis contributes to the region’s ecological knowledge, with the primary aim of enhancing management efforts and providing …
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Impacts of Tamarisk Biocontrol (Diorhabda Elongata) on the Trophic Dynamics of Terrestrial Insects in Monotypic Tamarisk Stands
… provides an opportunity to evaluate how the trophic spectra of terrestrial insects respond to a herbivorous biocontrol. To evaluate this restoration approach and the interaction biocontrol may have with terrestrial insect populations, I quantified trophic unit richness and abundance and …
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Trophic dynamics in the fine-root based food web: integrating resource heterogeneity, root herbivores, and root foraging
… soil resource heterogeneity structures both root dynamics and the abundance and influence of root herbivores. I conducted two field and one greenhouse experiment examining this proposed model. The dissertation includes an introductory chapter (Chapter 1), a field study examining root responses to …
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The trophic dynamics of the broadnose sevengill shark (Notorynchus cepedianus) in False Bay, South Africa, using multiple tissue stable isotope analysis
… there is limited quantitative information on the trophic ecology of large, apex predator sharks. This is largely a consequence of their occupying naturally low population densities, being highly mobile and elusive and ranging over large distances. Stable isotopes provide a low cost, non-lethal …
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INDIRECT EFFECTS OF LOW AMPLITUDE ARVICOLINE CYCLES ON DAILY NEST SURVIVAL OF DUNLIN (CALIDRIS ALPINA HUDSONIA) IN A RAPIDLY CHANGING CLIMATE
… complex than the High Arctic with multispecies trophic dynamics that can be used to predict the changing landscapes of the Arctic as the boreal forest expands northwards.
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Long-Term Warming And The Size And Phenology Of Long Island Sound Plankton
<p>In coastal ecosystems with decades of eutrophication and other anthropogenic stressors, the impact of climate change on planktonic communities can be difficult to detect. A time-series of monthly surface water temperatures in the Central Basin of Long Island Sound (LIS) from the late 1940s until …
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Addressing the impact of the EU CFP landing obligation on the northern North Sea ecosystem and Shetland fisheries in a changing climate.
Using ecosystem models, past and present dynamics of the northern North Sea were explored to estimate future impacts of the Landing Obligation (LO) and climate change. Building an Ecopath with Ecosim (EwE) model of northern North Sea (International Council for the Exploration of the Sea ICES …
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Quantifying biotic interactions with inshore subtidal structures: comparisons between artificial and natural reefs
… and their receiving environment. Finally, the trophic dynamics of artificial and natural reefs were investigated through the use of stable isotope ratios.<br/>These studies showed that post-settlement processes appear to be controlling<br/>differences in epifaunal recruitment to artificial and …
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POPULATION ECOLOGY AND PRODUCTION OF THE SANDY-BEACH AMPHIPOD HAUSTORIUS CANADENSIS (CRUSTACEA: HAUSTORIIDAE) (MAINE, NEW ENGLAND)
… goal of this study was to determine the seasonal trophic dynamics and life history of the sandy-beach amphipod Haustorius canadensis in order to gain a better understanding of the functioning of northern New England sandy-beach communities. Haustorius canadensis is one of the three dominant …
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The roles of predation, competition, and exploitation in the community dynamics of the New River in West Virginia
A model of the trophic dynamics among key macroinvertebrate and fish populations in the New River, West Virginia, was developed to help define the roles of predation, competition, and fishery exploitation in the food web of this large, warmwater stream. The fates of production of the harvested …
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Microzooplankton Dynamics in Lower Chesapeake Bay and Its Major Tributaries
… Microzooplankton are defined as those heterotrophic organisms which range from 20 to 200 $\mu$m in size, and in this study were mainly composed of copepod nauplii, rotifers, and ciliates. Ciliates were the most abundant microzooplankton, comprising more than 90% of the total density, with …
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The foraging ecology and conservation of the Great Black-backed Gull Larus marinus
… indirect impacts such as the destabilisation of trophic relationships between predators and prey, leading in turn to predator-prey conflicts within seabird communities. Monitoring the abundance of seabird species and advancing our knowledge of their foraging ecology is therefore fundamental to …
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Lipid Biomarkers for Marine Fungi
… and may be utilised to explore the viability and trophic dynamics of marine microbial communities. Although lipid biomarkers for fungi have been used in terrestrial environments, such as soils, for many years, seldom few have investigated whether these are applicable for fungi in marine …
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Organic Matter Dynamics and Trophic Structure in Karst Groundwater
… should be important energy sources to higher trophic levels in the aquifer. The ecosystem expansion and contraction model, originally developed to describe surface streams, may be a good descriptor of spatial and temporal patterns of microbial films in karst aquifers. The process of leaf and …
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Selenium uptake, trophic transfer, and toxicity in boreal lake ecosystems
… to improve the current understanding of Se biodynamics and toxicity in Canadian boreal lakes, with the ultimate goal of informing future ecological risk assessments of Se in Canada. Limnocorrals in two lakes located at the International Institute for Sustainable Development – Experimental Lakes …
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