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.
Results
Showing 1 to 20 of 39 for “"distribution modeling"”.
-
Species Distribution Modeling for Arid Adapted Habitat Specialists in Zion National Park
… learning method, MaxEnt, constructed species distribution models (SDMs) in ZION for the two study species at 30 m and 900 m spatial resolutions using climate, topographic, and remotely sensed data. Additionally, 900 m forecasting models were constructed to observe the shifts in suitable …
-
Prioritization of conservation areas using species distribution modeling based on current data of butterflies in Johor
… justifies the need to study species range and distributions so that high-priority conservation areas can be identified. Species distribution modeling (SDM) is an approach that can overcome the time and budget constraints of protected area management. This research aims at providing an efficient …
-
Using Species Distribution Modeling to Assess Illegal Trade Risk: A Case Study of US Imports of Endangered Mahogany (Swietenia spp.)
… a lack of consistent, comprehensive global distribution data makes validating these declarations difficult. I aimed to assist in this analysis by developing species distribution models for the American mahogany species (genus Swietenia). American mahoganies are high-value, high-demand …
-
The vascular flora and species distribution modeling of two rare species in Cloudland Canyon State Park, Dade and Walker Counties, Georgia
… with the floristic investigation, species distribution models were created using Maxent for two rare species: Spiraea virginiana (Rosaceae), and Lilium philadelphicum (Lilliaceae). Surveys for the target species at the modeled sites were conducted in Cloudland Canyon State Park, resulting …
-
Using Remote Sensing and Biogeographic Modeling to Understand the Oak Savannas of the Sheyenne National Grassland, North Dakota, USA
… the landscape scale. In this research, I map the distribution patterns of oak savanna in the Sheyenne using a combination of remote sensing and geospatial datasets, including landscape topography, soils, and fire disturbance. Further, I interpret the performance of a suite of advanced Species …
-
Overcoming nanoscale variations through statistical error compensation
… With the aid of a well developed CNFET delay distribution modeling method, circuit simulations show up to 90× improvement of the SSNOC-based design in the circuit yield over the conventional design. The results verify the robustness of an SEC-based design under CNFET-specific variations. The …
-
Towards material-informed tectonics
… computational design framework for material distribution modeling that enables the production of geometrically complex, materially heterogeneous, and functionally graded objects, across scales, media, and platforms. Receiving user-defined performance mappings as input, the workflow generates …
-
Distributional Modeling Of Rare Fishes And Mussels: From Ecological Theory To Biodiversity Conservation
… leading causes of stream degradation. Species distribution models (SDMs) have become an integral tool in ecological research and conservation planning. SDMs are reliant upon occurrence datasets for the taxa of concern and museum-based information has become a popular source for such data. In …
-
CLIMATE DRIVEN RANGE SHIFTS OF NORTH AMERICAN SMALL MAMMALS: SPECIES’ TRAITS AND PHYLOGENETIC INFLUENCES
… chipmunks, and ground squirrels. I used species distribution modeling to develop predictions for the distributions of species under current and future climate scenarios, and quantified the differences. AIC analysis was used to compare alternative models. Elevation held the most explanatory power …
-
Comparative Phylogeography of Glassfrogs (Vitreorama) Endemic to the Brazilian Altantic Rainforest
… and V. uranoscopa. I integrate species distribution modeling, path analysis, and molecular data to test the role of climatic stability, rivers, mountain chains, and geographic distance in shaping genetic differentiation. Moreover, I test the affect of climatic stability on the …
-
Controls over the distribution of soil micro-invertebrates in the McMurdo Dry Valleys, Antarctica
… long-term ecological data with spatial habitat modeling to investigate the environmental drivers of micro-invertebrate distributions and predict future distributions under variations in moisture availability associated with shifting climate regimes. Chapter 1 documents the creation and cleaning …
-
UNCERTAINTY QUANTIFICATION IN DOWNSCALING OF PRECIPITATION EXTREMES AND ITS APPLICATION TO NEW ENGLAND
… addressed: uncertainty arising from parametric distribution modeling for precipitation extremes and uncertainty due to the particular predictive model employed for estimation of their return levels. Both sources were examined and quantified using credibility intervals of downscaled 25-year …
-
Species response to shifting and variable climates
… high-throughput DNA sequencing, hindcast Species Distribution Modeling, and a reassessment of pollen records, I found evidence that Alnus expanded from several population nuclei (i.e. refugia) that existed during the LGM and coalesced during the Holocene to form its present range. These results …
-
The impacts of voluntary private lands programs on stream fish diversity in the Kaskaskia River Basin, Illinois
… obtaining this information are valuable. Species distribution modeling (SDM) has provided us with a chance to gain more information about communities without additional sampling effort. I look to balance sampling efforts with species distribution modeling to investigate the effects of CRP of …
-
Looking into the Past: The Diversification of Amphibians in the Neotropical Savannas
… molecular data, in combination with species distribution modeling for the past, in order to resolve questions of evolutionary history, taxonomic diversity, species boundaries, and test hypotheses that implicate climatic (stable/unstable) and geomorphological events (plateau/valley) in the …
-
Applying new aquatic habitat data to manage invasive and imperiled crayfishes in North America
… to better characterize freshwater habitat in modeling applications. My research applies these new freshwater GIS data layers to species distribution modeling (SDM) with implications for management of both imperiled and invasive freshwater crayfishes. In Chapter 2, I developed SDMs to …
-
The distribution and ecology of invasive ant species in the Pacific region
… responsible for their current and potential distribution. This thesis examines the spatial distribution of invasive ant species at a range of scales. The focus is on the Pacific region, specifically Fiji and New Zealand, which have a relatively high number of invasive ant species. Taxonomic …
-
Guiding diffusion generative models with applications to inverse problems
… random variables, we aim to sample a probability distribution that assigns a probability to each possible solution for a latent signal x, given the observed data y, known as the posterior, p(x|y). DDMs targeting p(x) are repurposed for solving inverse problems by using Bayes rule as a mapping from …
-
From Small to Large: Modeling at the Scale of Ecological Processes to Understand Temperate Forest Range Limits, Biomass, and Traits
… In this dissertation, I employ novel statistical modeling on continent-spanning observational datasets, national forest inventories from temperate regions, with the aim to understand how forest communities may respond to future climate. In each chapter, the methodological focus on scale is …
Page 1 of 2