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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 24 for “"Species distribution models (SDMs)"”.
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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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Species Distribution Modeling for Arid Adapted Habitat Specialists in Zion National Park
… The machine 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 …
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Phylogenetic Niche Modeling
Projecting environmental niche models through time is a common goal when studying species response 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 …
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Science, Community, and Culture: A Holistic Approach to Ecological Research and Education
… historically been used to identify drivers of species declines, but such studies are often resource-intensive, resulting in significant spatial and temporal data gaps when researchers lack the resources necessary to maintain such studies. One promising solution for overcoming gaps in …
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Ensemble models to assess the risk of exotic plant pathogens in a changing climate
In recent decades, species distribution models (SDMs) have been widely used in many ecological, environmental and climate-change research studies to model invasive species establishment. These models associate recorded locations of species with environmental variables. Nevertheless, the few studies …
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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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APPLICATIONS OF GEDI LIDAR FOR REMOTE SENSING OF FOREST STRUCTURE AND BIODIVERSITY INDICATORS
… native mangroves in Nigeria and an invasive palm species introduced to the delta. My findings indicate that even in short, coastal forests, GEDI is capable of quantitatively distinguishing between forest types with Plant Area Vegetation Density profiles demonstrating notable differences in the …
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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
Invasive plant species are an increasing global threat to native biodiversity. Effective management depends on accurate predictions of their spread. However, modelling the geographic distribution of invasive species, particularly with methods like correlative species distribution models (SDMs), is …
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The effects of paleoclimate on the distributions of some North West African Lizards.
… concern over the effects these changes have on a species habitat and distribution. Climate change is thought to have a major effect on the distribution of species, with the potential to cause isolated/fragmented populations, which could lead to genetic divergence. In this study species …
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Fast methods for fitting log-Gaussian Cox process models in ecology.
… not be explained by a Poisson process. Such models are important in ecology where point patterns arise in the form of presence-only data - records of species' locations - and used to construct Species Distribution Models (SDMs) as a function of environmental variables. Fitting LGCP models can …
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Assessing conservation status of remnant mammal populations in a Neotropical cloud forest
… the habitat in which they reside, some mammal species are also highly threatened; sensitive to deforestation and hunting. Protected areas are a cornerstone of conservation policy and National Parks have notionally one of the highest status designations, yet in many instances such designation …
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Assessing predictive performance and transferability of species distribution models for freshwater fish in the United States
Rigorous modeling of the spatial species distributions is critical in biogeography, conservation, resource management, and assessment of climate change. The goal of chapter 2 of this dissertation was to evaluate the potential of using historical samples to develop high-resolution species …
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Integrating dynamic and statistical modelling approaches in order to improve predictions for scenarios of environmental change
Species respond to 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 …
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CHANGES OF CLIMATE ZONES AND THEIR IMPLICATIONS FOR BIODIVERSITY
Climate change is driving biodiversity redistribution on Earth, undermining the effectiveness of protected areas (PAs) in conserving global biodiversity. Managing the consequences of biodiversity redistribution and promoting effective conservation necessitates a better understanding of climate …
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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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Distributional Modeling Of Rare Fishes And Mussels: From Ecological Theory To Biodiversity Conservation
… across North America. Nearly 50% of the mussel species and 25% of the fish species in North America are imperiled. Stream habitat degradation has been cited as the principal cause for declines, with anthropogenic land uses being the leading causes of stream degradation. Species distribution …
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From ecology to the assessment of multiple ecosystem services; a case study of estuarine bivalves
… and measuring them in functionally similar species in different habitats is rarely considered, although ecological studies indicate differences are likely. I measured in situ bivalve contribution to water quality regulation for two functionally similar bivalve species (infaunal …
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Integrated in situ and ex situ approach for Gentiana lutea L. ssp. lutea conservation
… of EU, whose purpose is the protection of plant species by control of their trade. Due to a lack of knowledge on the current G. lutea distributional information in Sardinia, Species Distribution Models (SDMs) could be even an important tool to limit search efforts by selecting the areas where …
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POPULATION GENOMICS, DISTRIBUTION AND REPRODUCTIVE ECOLOGY OF AN ITALIAN STENO-ENDEMIC CHASMOPHYTE, CAMPANULA RAINERI
Plant species distributions are the result of climatic and evolutionary histories. Range restriction in steno-endemic species often results from climate oscillations that have reduced the extent of suitable habitat or limited species dispersion across ecological barriers. Narrow endemics may also …
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