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 36 for “"Habitat modification"”.
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ATTRACTING BENEFICIAL INSECTS TO YOUR FARM: A COMPARISON OF HABITAT MODIFICATION STRATEGIES
… have many options when considering which habitat modification techniques they can implement on their agri-environment schemes. This comparative analysis of 47 peer reviewed journal articles assesses which landscape enhancements are most effective in attracting beneficial insects, namely …
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A multi-temporal image analysis of habitat modification in the Coastal Watershed, NH
<p>Habitat modification has become a progressively important concern as human populations increase and urbanization continues to replace natural environments with anthropogenic landscapes. Habitat modification concerns both the loss and fragmentation of environments, and these actions can have …
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Habitat modification and gene flow in Saimiri oerstedii: Landscape genetics, intraspecific molecular systematics, and conservation
Habitat modification, when it results in population fragmentation, often results in the loss of genetic diversity due to reduced gene flow, inbreeding, and genetic drift. However, the severity of these effects depends on how diminished dispersal and gene flow become between patches of suitable …
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UNDERSTANDING THE INFLUENCE OF ANTHROPOGENIC HABITAT MODIFICATION ON URBAN ANIMALS: CASE STUDIES OF CARRIBEAN LIZARDS AND NORTH AMERICAN MAMMALS
… urbanization is rapidly expanding, leading to habitat degradation and fragmentation, which present strong challenges for native wildlife. At the same time, urbanization is often accompanied by the introduction of non-native species, which alter community and habitat structures. These changes …
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Climatic change, habitat modification and relative age of dung beetle taxa (Coleoptera: Scarabaeidae, Hydrophilidae, Histeridae, Staphylinidae) in the South-Western Cape
… pasture (five sites) and shrubland (eight sites) habitats. Five traps at each site were baited on one 24h occasion each month over six months.
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Small Mammals in Prairie Wetlands: Habitat Use and the Effects of Wetland Modifications
Although well documented for other habitat types, small mammal habitat use patterns in prairie wetlands are poorly understood. The distribution of the mammal fauna of South Dakota is also not well known. Because of the lack of information in these areas, evaluation of the impacts of wetland …
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Conservation Genetics and Distribution of the Yazoo Darter (Etheostoma Raneyi)
… have compared them to historic estimates before habitat modification and fragmentation. I also used genetic methods to try to detect and determine when population declines occurred. Results indicate that the Yazoo Darter is distributed unevenly across the two major river drainages within its …
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The effect of habitat structure on reproduction and prey capture of a rare carnivorous plant, Pinguicula lutea
Habitat modification is one of the greatest threats to biodiversity worldwide and the main contributor to the decline of many carnivorous plant species. For carnivorous plants in the Southeast US, including many Pinguicula species (butterwort, Lentibulariaceae), habitat modification via altered …
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Responses Of The Florida Mouse (podomys Floridanus) To Habitat Management
… its status as a species that is threatened by habitat loss statewide. Publicly owned lands offer protection for the species, but management is generally focused on protecting biodiversity in general and not a particular species. The response of the Florida mouse to land management practices …
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Population Status and Trends of the Ringed Sawback (Graptemys oculifera) in The Pearl River Drainage of Mississippi and Louisiana
… Species Act in 1986 largely due to extensive habitat modification and major habitat degradation throughout portions of its confined geographic range. Despite species protections, alterations to the structure and flow of the river have continued to threaten the drainage and likely the species’ …
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Comparative Ecology and Conservation Status of Procambarus (Pennides) gibbus and Procambarus (Pennides) versutus in Marion County, Georgia
… of the yearlong study were to 1) compare the habitats of these species, looking for environmental differences that might account for their isolated distributions within the county and 2) assess the current conservation status of P. gibbus and P. versutus. Each study site was characterized by a …
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Level of UV-B Radiation Influences the Effects of Glyphosate-Based Herbicide on Fitness of the Spotted Salamander
… population declines since the 1980's, with habitat modification, ultraviolet radiation (UV-B) and environmental contaminants (such as glyphosate-based herbicide) being among the most common. This study identifies the effects of a generic glyphosate-based herbicide (GLY- 4 Plus) on mortality, …
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The Effect of Landscape Variables on Adult Mosquito (Diptera:Culicidae)Diversity and Behavior
… to lessen the prevalence of mosquitoes through habitat modification of non-adults. With emerging diseases (i.e. Dengue and Chikunguya) encroaching into Florida from the Caribbean, this traditional approach may not be enough. Alternatively, we can better understand the ecology of how disease …
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The effects of climate and habitat on Butterfly populations
… datasets.<br/><br/>The effects of climate and habitat of butterfly populations are examined to understand the implications of environmental change for these, and other, insect taxa. It is found that first appearance (phenology) of most British butterflies has advanced in the last two decades …
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Global Conservation Status and Threat Patterns of the World’s Most Prominent Forage Fishes (Teleostei, Clupeiformes)
… threats include exploitation, pollution and habitat modification for human use although the intensity of a specific threat differs between freshwater, estuarine and marine environments. Life history and ecological traits of threatened and Near Threatened species were characterized between …
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A Mechanistic and Landscape Scale Approach Quantifying Habitat Suitability of Cheatgrass (Bromus tectorum) Engineered Habitats for Great Basin Reptiles
… In the Great Basin Desert of North America, habitat degradation has led to widespread invasion by a highly successful plant species, cheatgrass (Bromus tectorum). The result has been the alteration of landscape structure and ecosystem function. This novel habitat has been implicated in …
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Characterization of the molecular genetic variation in wild and farmed Nile tilapia Oreochromis niloticus in Ghana for conservation and aquaculture development
… long-term persistence in the wild, including habitat destruction, overfishing, climate change, and hybridization with farmed populations. Knowledge of the genetic variation among wild populations also can contribute to foundation and selection of genetically diverse populations for …
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Sustainable Land-Use Management for the Conservation of the Freshwater Pearl Mussel: Sediment Flux and Provenance
… sedimentation of watercourses can reduce habitat quality, in part due to the limitation of exchange between the hyporheic zone (the porous substrate adjacent to flowing water) and the water column. This effect is of crucial importance to the FPM which inhabits the hyporheic zone at …
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The Interactive Effects of Multiple Stressors on Lithobates catesbeianus and Anaxyrus americanus
… declines are discussed in Chapter 1 and include: habitat modification and destruction, commercial over-exploitation, introduced species, environmental contaminants, global climate change, and infectious diseases.</p> <p>Chapter 2 discusses the major research aspects of the thesis by examining the …
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BUILDING FRAMEWORKS FOR UNDERSTANDING INVASIONS AND EXTINCTIONS FOR BIODIVERSITY SCIENCE
… major drivers of current loss—overexploitation, habitat modification and destruction, climate variability, spread of pathogens, and invasion by exotic species. Biodiversity change and especially loss can alter ecological assemblages irreversibly, which consequently can change the direction and …
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