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 25 for “"metapopulation dynamics"”.
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Metapopulation dynamics of the softshell clam, Mya arenaria
In this dissertation, I explored metapopulation dynamics and population connectivity, with a focus on the softshell clam, Mya arenaria. I first worked towards developing a method for using elemental signatures retained in the larval shell as a tag of natal habitat. I designed and implemented an …
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Metapopulation dynamics of the softshell clam, Mya arenaria
In this dissertation, I explored metapopulation dynamics and population connectivity, with a focus on the softshell clam, Mya arenaria. I first worked towards developing a method for using elemental signatures retained in the larval shell as a tag of natal habitat. I designed and implemented an …
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The Role of Resource Predictability in the Metapopulation Dynamics of Insects
<p>The metapopulation paradigm has emerged as an important tool to understand the dynamics of species living in fragmented landscapes. In this dissertation, I investigate the unpredictable nature of resource availability for species living in human-dominated heterogeneous and dynamic landscapes in …
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Connectivity, metapopulation dynamics, and genetic structure of tiger salamanders in a heterogeneous landscape
Metapopulation biology has been integral for understanding the impact of spatial habitat structure on ecological and evolutionary processes. In fragmented landscapes, theory predicts that species occupancy and turnover dynamics depend on habitat area and isolation, and isolation has historically …
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AnoSpEx: a spatially explicit predictive computational model for studying Anopheles metapopulation dynamics towards malaria control
… phelesSpatially-Explicit) to simulate Anopheles metapopulation dynamics. The model is biologically rich, parameterized by field data, and driven by field-collected weather data from Macha, Zambia. To preliminarily validate ANOSPEX, simulation results were compared to field mosquito collection …
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Local and regional controls of brook trout (Salvelinus fontinalis) metapopulation dynamics within a complex Appalachian riverscape
… brook trout populations may demonstrate linked metapopulation structure, where productivity and population dynamics operate at the watershed scale. Contrasting views on the appropriate spatial scale limiting brook trout productivity must be resolved for effective conservation planning: are brook …
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Application of synchronisation theory to plankton patchiness
This study applies a metapopulation dynamics approach to modelling a distribution of plankton by representing a region of ocean as an ensemble of plankton populations interacting through the stirring and mixing effects of the flow. The methods of synchronisation theory are applied within this …
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Dispersal Behavior Of Mosquitofish (gambusia Holbrooki)
… help better understand and predict mosquitofish metapopulation dynamics and invasions. I experimentally tested dispersal behavior of individual mosquitofish under a range of laboratory conditions relevant to field situations. Preliminary experiments showed that gender, lighting conditions, hunger …
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Ecology of the marsh rice rat (Oryzomys palustris) in southern Illinois: wetland dynamics, metapopulations, and trophic position
… potentially habitat quality, and therefore drive metapopulation dynamics. Differences in hydrology between wetland complexes could change food webs and consequently the trophic diversity of the communities occupying these areas. My first objective was to assess the spatial and temporal variation …
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Population Structure of Lethrinus Lentjan (Lethrinidae, Percoidei) Across the South China Sea and the Philippines Is Detected With Lane-Affected RADSeq Data
… on its life history, ecosystem services, and metapopulation dynamics. This study also used STRUCTURE analysis to detect a strong Illumina sequencer lane effect, where the genotype of a fish is associated with the sequencer lane used to generate the data. To control and remove this lane effect, …
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Reconstructing animal-vectored nutrient fluxes in paleoenvironments: A case-study of Aotearoa New Zealand’s burrowing procellariiforms
… describe an agent-based model of procellariiform metapopulation dynamics under environmental change. Analysis of this model demonstrates that the presence of predators in one population can suppress a linked predator-free population via source-sink dynamics and that ENSO-associated variability in …
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Desert bighorn sheep in Mexico
… movements, predation, diseases, and metapopulation dynamics). Bighorn sheep in Mexico have been scarcely studied. We conducted a habitat use study in Rancho el Plomito, Sonora, Mexico from April 1997 to December 1998 and the data were used to determine causes of sexual segregation. …
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Demography and ecology of a declining endemic: The Olympic marmot
… of the abandoned sites were inconsistent with metapopulation dynamics as the cause of the declines. There was no evidence that disturbance by tourists was responsible - although marmot behavior differed between remote and regularly-visited sites, there was no corresponding difference in birth …
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Demography and ecology of a declining endemic: The Olympic marmot
… of the abandoned sites were inconsistent with metapopulation dynamics as the cause of the declines. There was no evidence that disturbance by tourists was responsible - although marmot behavior differed between remote and regularly-visited sites, there was no corresponding difference in birth …
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Conservation biology of the marsh fritillary butterfly Euphydryas aurinia
… aurinia was investigated, analysing its metapopulation dynamics, interactions with parasitoids and the efficacy of habitat restoration. Euphydryas aurinia has undergone a widespread national decline in recent years. This decline is quantified at a 10km scale. The distribution in 2020 was …
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Patterns and processes underlying genetic diversity in the Namaqua rock mouse Micaelamys namaquensis Smith, 1834 (Rodentia : Muridae) from southern Africa
… a combination of a stepping-stone model and metapopulation dynamics may be applicable to this lineage. Examination of type material of described subspecies is needed to resolve the identity of the unique lineages which will allow us to better understand the phylogeography and mode of …
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Mitochondrial DNA sequence variation in North Atlantic long-finned pilot whales, Globicephala melas
… a result of a slow rate of sequence evolution or metapopulation dynamics resulting from the social system of pilot whales. To examine the effect of social structure, I used an individual-based model designed to study the effect of sub-population extinction on mitochondrial genetic diversity in a …
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Habitat Selection, Dispersal and Detectability of Cobblestone Tiger Beetles (Cicindela marginipennis Dejean) along the Genesee River, New York
… year study were to (1) understand the dispersal dynamics of the adult cobblestone tiger beetles (Cicindela marginipennis); (2) identify environmental variables associated with suitable habitat; (3) model habitat selection; (4) describe important features of their natural history; and (5) …
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Investigating the foraging ecology of black guillemots Cepphus grylle in relation to tidal stream turbines and marine protected areas
… and philopatry across Britain and Ireland, as metapopulation dynamics may have implications for colony recovery. These properties were found to vary with latitude, potentially related to regional environmental conditions.<br/>In relation to MPAs, the findings of this thesis have implications …
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Conservation of an endangered amphibian: the case of the Natterjack toad (Epidalea calamita) in Ireland
… selection, spatial ecology, population biology, metapopulation dynamics, genetic diversity, biogeography and effects of climate change. <br/><br/>Natterjack toad annual egg string counts suggested a -23% decline in the number of egg strings between 2004 and 2018 with local extirpation at one …
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