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 138 for “"Landscape Level"”.
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Landscape level raptor habitat associations in northwest Connecticut
… Measurements were taken at a macro ground level and from 1:12,000 and 1:40,000 black and white and 1:58,000 and 1:126,000 color infrared aerial photography. Among-species nest area analyses at the ground level indicated that higher beech and red maple densities were associated with …
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Predicting Amphibian Occurrence Based on Wetland and Landscape Level Factors in Montana
… Recently, other habitat requirements including landscape level factors have been examined. Data collected from amphibian surveys in Montana were used to determine if wetland quality factors or landscape level factors were better determinants of amphibian occurrence at breeding sites. Twenty-six …
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Predicting Amphibian Occurrence Based on Wetland and Landscape Level Factors in Montana
… Recently, other habitat requirements including landscape level factors have been examined. Data collected from amphibian surveys in Montana were used to determine if wetland quality factors or landscape level factors were better determinants of amphibian occurrence at breeding sites. Twenty-six …
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Evaluation of landscape level habitat characteristics of golden eagle habitat in Northwestern Mexico
… of current conservation efforts of habitat at a landscape level. Successful conservation and management requires accurate information on ecology of the species upon which decisions can be based. This study investigated habitat characteristics of the areas occupied by golden eagles and developed …
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Pattern and process in South Coast dune fynbos : population, community and landscape level studies
… dynamics in response to disturbance in a dune landscape comprising a mosaic and admixture of grassland, fynbos and thicket. A hierarchical approach directed investigations at the landscape, community and population levels, with emphasis on seed banks. The study concentrated on fynbos, the …
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Landscape Level Evaluation of Northern Bobwhite Habitats in Eastern Virginia Using Landsat TM Imagery
… a lack of knowledge about the broad-scale, landscape level habitats in eastern Virginia. A large scale land cover map along with a detailed understanding of the spatial arrangements of bobwhite habitats will not only aid Virginia's management plan, but also allow focused efforts by our …
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Predicting habitat suitability for American woodcock and landscape-level assessment of habitat in West Virginia
… 4), (2) quantify and describe the local and landscape structural components and spatial patterns of woodcock habitat in the state (Chapter 3), and (3) to determine the current suitability and fate of woodcock habitat that was available in the mid-1970's (Chapter 5).;Differences between 165 …
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Modeling Culex tarsalis Coquillett abundance on the northern Colorado Front Range using a landscape-level approach
… mosquito abundance of Cx. tarsalis. I applied a landscape-level approach to elucidate the effects of landscape-level environmental factors (independent or predictor variables) at multiple spatial extents on monthly adult Cx. tarsalis abundance (dependent variable) in Fort Collins, Loveland and …
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Quantifying Trends In our National Parks: A Landscape Level Analysis of Climate Change and Ecosystem Productivity
… of change will vary spatially across the landscape, making it difficult for park managers to adopt just one approach to managing for climate change. Therefore, there must be a systematic way to analyze climate trends and the subsequent effects on ecosystems, which is unbiased and useful in …
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Quantifying Trends In our National Parks: A Landscape Level Analysis of Climate Change and Ecosystem Productivity
… of change will vary spatially across the landscape, making it difficult for park managers to adopt just one approach to managing for climate change. Therefore, there must be a systematic way to analyze climate trends and the subsequent effects on ecosystems, which is unbiased and useful in …
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USING LANDSAT IMAGERY TO EVALUATE LANDSCAPE-LEVEL IMPACTS OF NATURAL GAS FIELD DEVELOPMENT: TAZOVSKY PENNINSULA, RUSSIA, 1984-2007
… on the adjacent tundra using three methods: a landscape fragmentation analysis, mean and change in mean NDVI analyses, and a cross-tabulation analysis. These analyses show that the tundra has become increasingly fragmented during the study period, and that mean NDVI values in areas adjacent to …
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State-wide assessment of status, predicted distribution, and landscape-level habitat suitability of amphibians and reptiles in Montana
… estimates from this first-ever state-wide base level assessment can be more validly used for future comparisons with future status assessment, provided additional support for declines in Western Toad (<i>Bufo boreas</i>) and Northern Leopard Frog (<i>Rana pipiens</i>) populations in western …
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USING LANDSAT IMAGERY TO EVALUATE LANDSCAPE-LEVEL IMPACTS OF NATURAL GAS FIELD DEVELOPMENT: TAZOVSKY PENNINSULA, RUSSIA, 1984-2007
… on the adjacent tundra using three methods: a landscape fragmentation analysis, mean and change in mean NDVI analyses, and a cross-tabulation analysis. These analyses show that the tundra has become increasingly fragmented during the study period, and that mean NDVI values in areas adjacent to …
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State-wide assessment of status, predicted distribution, and landscape-level habitat suitability of amphibians and reptiles in Montana
… estimates from this first-ever state-wide base level assessment can be more validly used for future comparisons with future status assessment, provided additional support for declines in Western Toad (<i>Bufo boreas</i>) and Northern Leopard Frog (<i>Rana pipiens</i>) populations in western …
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Habitat preferences of the eastern fence lizard, Sceloporus undulatus, in southwestern Virginia
… plots and at paired random plots. Landscape-level variables, southerly aspect and mixed forest type, distinguished lizard-centered from random sites. Hatchlings were associated with relatively high temperature at perch height (23 °C), relatively high amounts (per 1- m2) of coarse …
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Spatial and predictive foraging models for gray bats in northwest Georgia and a comparison of two acoustical bat survey techniques
… point was monitored for 20 minutes. A predictive landscape-level model was developed in a Geographic Information Systems (GIS). In summer 2001, to further refine gray bat spatial activity patterns on a macro-habitat level, I sampled 114 locations that were predicted on a landscape level as gray …
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Evaluating wildlife response to vegetation restoration on reclaimed mine lands in southwestern Virginia
… at each sampling point and were combined with landscape-level GIS information to relate habitat characteristics and wildlife patterns. I observed 80 bird species using reclaimed areas, clearcuts, and mature forest. Pre-regulation sites (prior to the Surface Mining Control and Reclamation Act of …
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The role of human disturbance in the dynamics and distribution of sand forest in and around Tembe Elephant Park, KwaZulu-Natal
… the spatial patterning of sand forest at the landscape level. Secondly human disturbance was investigated in the form of utilisation of forest products and the effects of this on the dynamics of sand forest as a whole as well as on individual species.
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Influence of the Conservation Reserve Program and Landscape Composition on the Spatial Demographics of Prairie Grouse in Northeastern South Dakota
… grouse (Tympanuchus spp.) have been linked to landscape-level habitat changes throughout their range. Since European settlement, millions of acres of native prairie have been lost to cropland conversion within the original range of prairie grouse in North America. Conversely, the Conservation …
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Land use drives the physiological properties of a stream fish
… community structure. Defining links between the landscape and performance of individual stream fishes can therefore improve our ability to predict how land use changes can impact stream communities, which has relevance for management activities. These studies tested the hypothesis that land cover …
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