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 39 for “"SDMs"”.
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Automating Laboratory Operations by Intergrating Laboratory Information Management Systems (LIMS) with Analytical Instruments and Scientific Data Management System (SDMS)
… a database. A scientific data management system (SDMS) provides a “Print-to-Database” technology, which facilitates the entry of reports generated by instruments directly into the SDMS database as Windows enhanced metafiles thus to minimize data entry errors. Unfortunately, SDMS does not allow …
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Quantifying the Expansion of an Invasive Plant Species, Dog-strangling Vine (Vincetoxicum rossicum), in Environmental and Geographic Space Over the Past 130 Years
… like correlative species distribution models (SDMs), is challenging. SDMs operate under the assumption that species are in equilibrium with their environment (i.e., they occur in all suitable environments); this assumption is more likely to be violated for a species that is still in the process …
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Using digitized herbarium specimens to predict potential distributions of Tennessee's historical angiosperm species
Species distribution models (SDMs) have become an essential tool in focusing conservation efforts for species with incomplete distribution records. SDMs enable conservation managers to increase field survey efficiency by prioritizing areas to invest time and financial resources. This application is …
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The influence of mood on self-defining memories
… which factors may affect the recollection of SDMs recall in terms of the types of memories recalled, but also the experience of recalling such poignant memories.Part two is an empirical paper, which explores the how changes in mood may affect the recollection of self-defining memories. This …
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Consideration of biotype to improve invasive species management
… areas where they would be most cost-effective. SDMs may be influenced by atmospheric and environmental variables; however, it is unknown if species organization under the biological species level, such as subspecies or biotype, influence SDM predictions. This thesis uses modelling methods, …
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Consideration of biotype to improve invasive species management
… areas where they would be most cost-effective. SDMs may be influenced by atmospheric and environmental variables; however, it is unknown if species organization under the biological species level, such as subspecies or biotype, influence SDM predictions. This thesis uses modelling methods, …
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Assessing predictive performance and transferability of species distribution models for freshwater fish in the United States
… high-resolution species distribution models (SDMs) of stream fishes of the United States. I explored the spatial transferability and temporal transferability of stream–fish distribution models in chapter 3 and chapter 4 respectively. Chapter 2 showed that the discrimination power of SDMs for …
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Integrating dynamic and statistical modelling approaches in order to improve predictions for scenarios of environmental change
… Correlative species distribution models (SDMs) relate species’ occurrence records to prevailing environmental factors to describe the environmental niche. They have been widely applied in global change context as they have comparably low data requirements and allow for rapid assessments of …
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Species distribution modelling of Aloidendron dichotomum (quiver tree)
A variety of species distribution models (SDMs) were fit to data collected by a 15,000km road-side visual survey of Aloidendron dichotomum populations in the Northern Cape region of South Africa, and Namibia. We fit traditional presence/absence SDMs as well as SDMs on how proportions are …
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The effects of paleoclimate on the distributions of some North West African Lizards.
… climatic events. Species distribution models (SDMs) were used to quantify a species niche and define the constraining factors that affect that niche. SDMs predict areas of suitable habitat under different climatic scenarios that replicate prehistoric climates, and used to examine if there is …
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Phylogenetic Niche Modeling
… to climatic change. Species distribution models (SDMs) are commonly used to estimate a species' niche from observed patterns of occurrence and environmental predictors. However, a species niche is also shaped by non-environmental factors--including biotic interactions and dispersal …
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Science, Community, and Culture: A Holistic Approach to Ecological Research and Education
… to create species distribution models (SDMs) for species with varying responses to human-mediated environmental change and 2) create a curriculum that synergizes Indigenous ecological knowledge, scientific research techniques, and community science to establish a more holistic learning …
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POPULATION GENOMICS, DISTRIBUTION AND REPRODUCTIVE ECOLOGY OF AN ITALIAN STENO-ENDEMIC CHASMOPHYTE, CAMPANULA RAINERI
… informed Species Distribution Models (SDMs) can reconstruct and predict changes in the geographical range of different intraspecific genetic lineages according to their ecological requirements and climate projections. Hypothesis 2 was thus verified by comparing the genetic structure of …
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APPLICATIONS OF GEDI LIDAR FOR REMOTE SENSING OF FOREST STRUCTURE AND BIODIVERSITY INDICATORS
… to improving bird Species Distribution Models (SDMs) in a single Protected Area in Uganda, thereby demonstrating applicability of structural complexity metrics towards biodiversity monitoring in regions known for their endemic species. I demonstrate that the inclusion of structural metrics in …
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Applying new aquatic habitat data to manage invasive and imperiled crayfishes in North America
… freshwater crayfishes. In Chapter 2, I developed SDMs to anticipate the potential future range extent of the emerging invasive crayfish Procambarus clarkii in the Laurentian Great Lakes. I created an SDM of all suitable crayfish habitat across the Great Lakes, then constrained this habitat to …
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A contribution to continuous-time quadrature bandpass sigma-delta modulators for low-IF receivers
… bandpass sigma-delta modulators (CT-QBP SDMs). CT-QBP SDMs is well suited for low-IF receivers due to some significant advantages over other implementations. Firstly, the possible design methodologies have been defined and compared. The proposed inverse method is desirable for the design …
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Statistical and process-based models for understanding species distributions in changing environments
… distributions (process-based model, PBM). SDMs are widely used due to their easy applicability and ability to handle varied data qualities. But they fail to reproduce the dynamic response of species distributions to changing conditions. PBMs are expected to be superior in this respect, but …
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Fast methods for fitting log-Gaussian Cox process models in ecology.
… used to construct Species Distribution Models (SDMs) as a function of environmental variables. Fitting LGCP models can be difficult and time consuming and, as a result, limits the ability of researchers to flexibly analyse presence-only data. In this thesis, we develop novel methodology and …
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The impacts of voluntary private lands programs on stream fish diversity in the Kaskaskia River Basin, Illinois
… classification. Of the 64 modeled species, 52 SDMs met my model performance requirements (TSS>0.2). These 52 SDMs were then stacked to obtain an index of species richness across the basin, and then the species richness values were compared with observed richness of modeled species, via …
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Marine stressor and receptor interactions: A new approach to incorporate multiple stressor impacts into marine spatial management
… was predicted using Species Distribution Models (SDMs) for seven functionally distinct benthic invertebrates, over two different spatial scales to compare the difference in model performance and usefulness of predictions made using data-rich national scale models compared to data limited regional …
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