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 32 for “"Species Distribution Model"”.
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Spatial regression methods capture prediction uncertainty in species distribution model projections through time
<p>Species distribution models (SDMs) relate observed locations of a species to climate, and are used for projecting the fate of a species under climate change scenarios. To be useful in a decision-making context, the uncertainty associated with these projections must be known. However, the …
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Spatial regression methods capture prediction uncertainty in species distribution model projections through time
<p>Species distribution models (SDMs) relate observed locations of a species to climate, and are used for projecting the fate of a species under climate change scenarios. To be useful in a decision-making context, the uncertainty associated with these projections must be known. However, the …
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Spread of Red Imported Fire Ant, Solenopsis invicta, in Virginia and effects of sub-lethal exposure to agrochemicals on its behavior
… First, we established a comprehensive distribution map of S. invicta in Virginia through multiple survey techniques. We then compared our findings with published models quantifying the potential spread of S. invicta and created our own species distribution model. In 2020-2021, S. …
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AI-Driven Suitability Modeling for Sustainable Olive Cultivation: An Environmental Assessment in a Changing Climate
… framework we propose integrates ecological niche modeling (ENM), maximum entropy (MaxEnt), and geographic information systems (GIS) to capture complex, nonlinear interactions among bioclimatic, topographic, and soil variables. By employing AI and machine learning to enhance ecological modeling, …
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Historical and Contemporary Variables Affecting the Range and Distribution of Aedes aegypti, The Yellow Fever Mosquito, in The United States
… R software (R Core Team) using linear regression models to determine the relationship between variables. The results showed there is a relationship between human population density and infected individuals for the whole dataset and by decade. To determine the current range of Aedes aegypti, …
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MAPPING THE DISTRIBUTION AND ABUNDANCE OF WESTERN LARCH (LARIX OCCIDENTALIS NUTT.) WITH MULTI-TEMPORAL SATELLITE IMAGERY AND GRADIENT MODELING
… is one of three native North American larch species, it occupies the mountainous regions of northwestern North America, and it is a deciduous conifer. Western larch is among the most ecologically and economically important conifer tree species in the northern Rockies region. This study …
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MAPPING THE DISTRIBUTION AND ABUNDANCE OF WESTERN LARCH (LARIX OCCIDENTALIS NUTT.) WITH MULTI-TEMPORAL SATELLITE IMAGERY AND GRADIENT MODELING
… is one of three native North American larch species, it occupies the mountainous regions of northwestern North America, and it is a deciduous conifer. Western larch is among the most ecologically and economically important conifer tree species in the northern Rockies region. This study …
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Unlocking the genetic diversity of the undomesticated rice relative Oryza longistaminata
… using individuals representing most of the species’ range genotyped with densely-spaced, genome-wide molecular markers. Spontaneous interspecific hybrids of O. longistaminata and O. sativa were discovered in germplasm from the International Rice Research Institute’s genebank, which can be …
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Determining the Status and Distribution of the Eastern Black Rail (Laterallus jamaicensis) in Coastal Texas
… wetlands throughout the Americas and is a species of conservation concern. In Texas, winter migrant and breeding populations of the eastern black rail (L. j. jamaicensis) are known to occur in disjunct wetlands along the Gulf Coast. Black rail distribution and life history, however, are …
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Fantastic Birds and Where to Find Them
… the nonbreeding habitat of the western subspecies of Willow Flycatchers (Empidonax traillii subspp.), including the federally endangered Southwestern Willow Flycatcher (Empidonax traillii extimus), with a range-wide species distribution model. The three western subspecies of Willow …
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Sense in Sensitivity: Assessing Species Vulnerability to Climate Change
… the impact of future climate change upon species vulnerability. Reports of shifts in species distributions are already numerous, but the pattern of change is not fully understood. This thesis looks to predict which species are likely to be most at risk under climate change and why? This …
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Elucidating cryptic diversity in East African frogs : the case of Arthroleptis francei Loveridge, 1953
Detailed information on the diversity of species and their distributions is crucial for the implementation of useful conservation measures. Here, I focus on the Afromontane region of Malawi and Mozambique, and use molecular techniques, environmental inferences and species delimitation methods to …
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Ecological consequences of genetically-based thermal traits in fishes
… of abiotic environmental factors on population distributions, assess the relationship between thermal tolerance and preference traits, characterize the genetic architecture of these thermal traits, and use these empirical data to construct a mechanistic species distribution model for a …
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The use of right of ways by primary burrowing crayfishes in the Ouachita Mountains Ecoregion of Arkansas
… two narrowly endemic primary burrowing crayfish species, Fallicambarus harpi and Procambarus reimeri. To investigate this interaction, I collected habitat data, locality information, and tested computer generated habitat models for these two species in the Ouachita Mountains Ecoregion (OME) of …
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The spatial ecology and conservation of an important game bird in Ireland: the Eurasian woodcock
A wide range of species are targeted by human hunters, including those with uncertain or poor conservation status. However, the direct and indirect effects of this exploitation can be complex and are often poorly understood. The Eurasian woodcock (hereon woodcock) is a largely migratory …
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Spatial ecology informs reintroduction tactics for warabin (Burhinus grallarius;bush stone-curlew)
… conservation intervention used to restore species and their ecological functions within their former range. Reintroduction success relies on the appropriate selection of tactics and strategies tailored to the species and recipient ecosystem; however, sufficient ecological knowledge is not …
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Spatial ecology informs reintroduction tactics for warabin (Burhinus grallarius;bush stone-curlew)
… conservation intervention used to restore species and their ecological functions within their former range. Reintroduction success relies on the appropriate selection of tactics and strategies tailored to the species and recipient ecosystem; however, sufficient ecological knowledge is not …
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A “Neighborhood” Approach for Using Remotely Sensed Data to Post-Process Species Distribution Models for Conservation Assessments
<p>Species distribution models can be used to predict environmental suitability, estimate changes in species’ geographic ranges, and support conservation assessments. Masking suitability maps built from these models to remove areas currently lacking appropriate vegetation can refine predictions and …
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SPATIALLY EXPLICIT MODEL OF AREAS BETWEEN SUITABLE BLACK BEAR HABITAT IN EAST TEXAS AND BLACK BEAR POPULATIONS IN LOUISIANA, ARKANSAS, AND OKLAHOMA
… utilized Maxent, a machine learning software, to model habitat suitability in this region. I collected known black bear presence locations (n=18,241) from state agencies in Louisiana, Oklahoma, Arkansas and east Texas and filtered them to reduce spatial autocorrelation (n=664). I also collected …
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