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 20 for “"Range Dynamics"”.
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Geographic range dynamics of South Africa's bird species
… conservation is a knowledge of the geographic ranges of species, and how these are changing through time. For birds there is a special opportunity to undertake studies of range changes, making use of the data collected by the First and Second Southern African Bird Atlas Projects (SABAP1 and …
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Evaluating occupancy and the range dynamics of invasive bird species in South Africa
… wildlife. The occupancy and population range dynamics of the Myna and Mallard species are individually investigated in the South African region by fitting static and dynamic occupancy models to a set of citizen science data for a 10-year study period between 2010-2019. The occupancy and …
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Home range dynamics of black bears in the Alleghany Mountains of western Virginia
… Mountains of western Virginia. I examined home range dynamics of bears during 1994-2002 on 2 study areas that were approximately 160 km apart. I analyzed my data with 3 home range programs (AMA, HRE, and ABODE) and determined the HRE was the least biased and produced the most biologically …
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Bird's response to seasonality: investigating the range dynamics of birds through dynamic occupancy models
… cues, thus leading to different seasonal range dynamics and migration strategies. In this study, I used dynamic occupancy models on the South African Bird Atlas Project 2 (SABAP 2) data to investigate the seasonal range dynamics of a selection of five migratory and six nomadic bird species …
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DNA-based Population Estimation, Harvest Vulnerability, and Home Range Dynamics of Black Bears in Western Maryland
… locations in Garrett County and examine home range dynamics. Fixed kernel estimates for annual, spring, summer, and fall home ranges were 10.40 km 2, 8.93 km2, 16.08 km2, and 19.35 km 2, respectively. Fall and summer home ranges were larger than spring home ranges, but summer and fall ranges …
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Demographic processes determining the range dynamics of plant species, and their consequences for biodiversity maintenance in the face of environmental change
… to introduce process-based model for species range dynamics that can be fitted to abundance data. For this purpose, the well-studied Proteaceae species of the South African Cape Floristic Region (CFR) offer a great data set to fit process-based models. These species are subject to wildflower …
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Spatial Ecology of a Vulnerable Species: Home Range Dynamics, Resource Use, and Genetic Differentiation of Eastern Spotted Skunks in Central Appalachia
… central and southern United States, with annual range-wide harvests of over 100,000 individuals. In Virginia, the spotted skunk is classified as vulnerable, and anecdotal evidence suggests that this species has been rare or largely absent from the central and southern Appalachians over the last …
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A methodology for mapping probable ranges of endangered terrestrial mammals within selected areas of Virginia
… used traditionally for predicting biological range limits. Maps based on these data may be inaccurate and may not provide useful information regarding the ranges of endangered species. A method was presented for predicting probable ranges of mammals based on the distribution of environmental …
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Habitat and Imperilment of the Candy Darter <i>Etheostoma osburni</i> in the New River Drainage, USA
The streams of the southeastern United States are both hotspots for biodiversity and centers of imperilment. The specific spatiotemporal scales at which stressors impact biota are often unknown, partly due to inadequate knowledge about many species' life-histories. I conducted two complementary …
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Effects of protected areas and climate change on the occupancy dynamics of common bird species in South Africa
… protected areas and climate change affect the range dynamics of common, resident bird species in South Africa. Common species were used because they have been shown to drive important ecosystem patterns, and a decline in abundance and diversity of common species can indicate drastic declines in …
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Collective Phenomena in Excitonic Quantum Matter
… scattering, and thus dominate low-energy long-range dynamics. This is corroborated by ballistic transport measurements in candidate material Ta₂NiSe₅. I subsequently consider photopumped exciton BECs in twisted heterobilayers of transition metal dichalcogenides such as MoSe₂/WSe₂. I show that …
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Modulation of coherently coupled surface-emitting laser arrays: analysis and applications
… mutual optical injection locking induced laser dynamics in phased, coherently coupled implant-defined PhC VCSEL arrays are investigated in detail both theoretically and experimentally. A model based on the well-established injection-locking laser rate equations is used to intuitively explain the …
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Fast and efficient approaches to large-scale occupancy models
… tools that are used to investigate species range dynamics, species interactions as well as undercover key biological processes that drive occupancy (and detection) in a particular region. The results from these models are used to answer pressing conservation questions and are often used to …
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Large Scale Homogeneous Turbulence and Interactions with a Flat-Plate Cascade
… parameters, especially relating to inertial range dynamics. Key findings include 1) that the extent of local isotropy is solely determined by the turbulence generator and the size of the wind-tunnel that houses it; and 2) that the turbulence generator operating conditions affect the shape of …
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An Investigation of the Factors that Facilitate and Inhibit the Range Expansion of an Invasive Plant
… and where these factors interact to set species range limits. Filling the existing knowledge gaps is imperative for the accurate predictions of how species will respond to global change, and particularly for invasive species, many of which are expected to benefit from global change. Here, I …
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Integrating dynamic and statistical modelling approaches in order to improve predictions for scenarios of environmental change
… by dynamically adjusting their geographical ranges. Robust predictions of these changes are prerequisites to inform dynamic and sustainable conservation strategies. Correlative species distribution models (SDMs) relate species’ occurrence records to prevailing environmental factors to …
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The foraging ecology of banded mongooses (Mungos mungo): Epidemiological and human-wildlife conflict implications
… population of banded mongooses - such as home range dynamics, denning ecology, movement ecology, and foraging ecology, all of which may play a role in banded mongoose exposure to M. mungi. Further, researchers have highlighted the potential role of prolonged elevations of glucocorticoids in …
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An assessment of Quality Deer Management on a private hunt club in the Virginia Piedmont
… Virginia, during 2003-2006. I examined home range dynamics of male white-tailed deer (Odocoileus virginianus), deer/hunter interactions, and aspects of population dynamics. I also developed a new rocket net method to capture deer using a remote video system that was more efficient than …
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Reconstructing Population Histories in Relation to Ecology
… increases even though species’ habitat ranges were decreasing. These results further emphasise the level of care needed when interpreting BSPs. If genetic methods for demographic reconstruction are to be used extensively in the future, it is important that we understand what confounding …
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Species response to shifting and variable climates
… during the Holocene to form its present range. These results challenge the unidirectional model for postglacial vegetation expansion based on several decades of palynological studies, implying that climate buffering associated with landscape heterogeneity and adaptation to …