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 92 for “"Metapopulation"”.
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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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SEED BANK DYNAMICS WITHIN A METAPOPULATION FRAMEWORK: A STUDY OF AN ANT-DISPERSED SPECIES
… above-ground subpopulation persistence within a metapopulation framework?<strong></strong></p> <p><strong>Location. </strong>Granite-gneiss outcrops within mixed hardwood-conifer forest in Michigan, USA<strong></strong></p> <p><strong>Methods. </strong>We studied the distribution of the …
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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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Cheetah (Acinonyx jubatus) mortality and survival in fenced reserves as part of a managed metapopulation across South Africa
… coordinates movements between reserves using a metapopulation framework. This coordinated management approach is still in its infancy and little data exist on how reintroduction success varies amongst individuals and reserves. This study aims to examine the causes of mortality and the factors …
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Metapopulation theory explains Black-stripe Minnow (Pisces: Galaxiidae, Galaxiella nigrostriata) distribution in seasonal wetlands in south-west Western Australia
… nigrostriata populations could belong to a metapopulation. Metapopulation theory describes how multiple populations with occasional connectivity are a ‘population of populations’. Some populations’ habitats have optimal conditions (source habitats), others experience regular extinctions …
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Metapopulations and metacommunities in dry forest openings in southern Illinois
… rare species may persist in a given region. A metapopulation is a type of regional dynamic in which local extinction is counterbalanced by recruitment from nearby patches. Metapopulation studies were originally conducted on animals, but have been adapted to plants, and are generally restricted …
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Conservation Through Population Assessments Across Variable Landscapes
… local population and the second evaluating metapopulations. In Chapter 2, I combined telemetry data on sooty terns (Onychoprion fuscatus) with a long-term capture-mark-recapture dataset from the Dry Tortugas National Park to map the movements at sea for this species, calculate estimates of …
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Spatial models of metapopulations and benthic communities in patchy environments
… a wide range of questions concerning population, metapopulation, community, and landscape ecology, in both terrestrial and aquatic systems. In this dissertation I develop and analyze a series of spatial models to study the dynamics of metapopulations and marine benthic communities in patchy …
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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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Population assignment of entrained migratory Westslope Cutthroat Trout in North Idaho
… Idaho Panhandle historically supported a robust metapopulation of Westslope Cutthroat Trout (WCT) Oncorhynchus clarkii lewisi, a western native salmonid of high cultural and economic value. The construction of impassible hydroelectric dams and smaller in-stream barriers has prevented the return …
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Interplay between spatial structure and competition in ecological communities
… well-mixed model. We first study the case of a metapopulation, a collection of smaller communities linked by dispersal. We find that when the environment is allowed to fluctuate stochastically, new growth laws emerge at the single species level, and high diversity is achieved in the case with …
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Optimal harvesting theory for predator-prey metapopulations / Asep K. Supriatna.
… the question of how to harvest a predator-prey metapopulation. Optimal harvesting strategies are found using dynamic programming and Lagrange multipliers. Rules about harvesting source/sink populations, more/less vulnerable prey subpopulations and more/less efficient predator subpopulations are …
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An experimental approach to assess the role of nest predation in the population dynamics of the sociable weaver (Philetairus socius)
… size trends by using a matrix-projection metapopulation model; (3) how protected colonies influence movement patterns; and (4) if nest predation had a compensatory or positive effect by reducing the intraspecific competition of a colony. The fourth aim was investigated by tracking the …
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The population and community ecology of small freshwater ponds: Assigning process to pattern
… the landscape contributes to overall patterns of metapopulation occupancy and robustness in a focal zooplankton species, Daphnia pulex. I parameterize this model with four-years of D. pulex occupancy data from a small network of 38 newly-constructed forested ponds at Svend O. Heiberg Memorial …
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Puma Dispersal Ecology in the Central Rocky Mountains
The structuring of populations within a metapopulation, connected through dispersal, is important to basic and applied ecology. However, a considerable gap exists in our knowledge of the influence landscape heterogeneity has on dispersal and its consequences. We examined landscape effects on …
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