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 29 for “"Landscape composition"”.
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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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Landscape composition and configuration affect nest founding but not success of bumble bee colonies in agroecosystems in the Lower Mainland of British Columbia, Canada.
Landscape structure influenced by land-use is likely to affect pollinator demography. Using naturally colonized nest boxes placed at 27 sites in the Lower Mainland of British Columbia, I assessed demographic responses of bumble bees to the availability of resources as inferred from landscape …
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LOCAL AND LANDSCAPE DRIVERS OF BIOLOGICAL PEST CONTROL IN AGRICULTURAL SYSTEMS
… pests and their natural enemies in agricultural landscapes. In my doctoral research, I explored how local and landscape composition influence the abundance, behaviors, and traits of insect pests and natural enemies, as well as the complex ecological interactions between them. Chapter 1 shows how …
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A GIS-Based Landscape Scale Model for Native Bee Habitat
… GIS in modeling native bee habitat to provide a landscape scale analysis method for native bees and develop a systematic sampling method for regional species list development. Raster GIS modeling, incorporating decision support and Poisson statistical methods were used to develop a native bee …
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An Evaluation of Duck and Ring-Necked Pheasant Nest Survival and Nest Density in Relation to Patch Size and Landscape Variables in Eastern South Dakota
… transformations over the last 100 years. Landscapes are currently dominated by large agricultural fields interspersed with small, isolated grassland patches. These isolated grassland patches are hypothesized to experience decreased nest survival rates for ring-necked pheasants (Phasianus …
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Wild bee responses to land use change: investigating the role of bee body size
… bees over both study years. The bee community composition differed between prairie types in the first study year but not the second. Regardless of prairie type, bee diversity increased with increasing forb diversity but did not have significant associations with landscape composition. …
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Causes and consequences of variation in the nutrition and endemic microflora of food stores in managed honey bees (Apis mellifera L.)
… and fitness. In Chapter 2 the nutritional composition of bee bread (pollen stored inside hives) was studied. The composition in terms of protein and reducing sugar was found to vary both spatially and temporally; lipid and starch content was found to vary temporally through the season. The …
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Landscape heterogeneity at multiple scales: effects on movement patterns and habitat selection of eleodid beetles
… with field experiments to investigate how landscape heterogeneity influences habitat selection in eleodid beetles of the shortgrass prairie of Colorado. I examined correlations in spatio-temporal patterns of habitat occupancy, population density, and community structure in eleodids with …
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Choreographing a Greenway: Exploring Experiential Diversity Through Choreographic Dance Principles
… dance can be successfully translated into the landscape, and how choreographic dance principles are helpful tools for creating a diverse and engaging landscape composition.
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The influence of woodlot size and location in suburban and rural matrices on bird species richness and individual abundance
… the influence of woodlot area and matrix composition on bird species richness and individual abundance. Bird surveys were conducted in winter 2004 and 2005 and spring 2005. Woodlot area and landscape composition were analyzed using GIS software. In winter, resident species richness and …
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PATTERNS OF AMERICAN BUMBLE BEE (BOMBUS PENSYLVANICUS) ABUNDANCE ACROSS RESTORED HABITATS IN EAST TEXAS ECOSYSTEMS
… CPUE variables from local vegetation structure, landscape composition and configuration, and management history. Habitat openness consistently emerged as the strongest predictor: canopy cover reduced CPUE, while pasture/grassland cover and restoration increased it, indicating that management …
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Avian nest predation: relationships with landscape characteristics and influences on adult and nestling behavior.
… between predator-specific nest predation and landscape composition dependent on the spatial scale at which it is examined, (2) are the nest defense behaviors of parent birds influenced by public information regarding nest predation risk, and (3) does nest predation risk influence the timing of …
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Factors Affecting White-tailed Deer Recruitment in Virginia
… the past twenty years concurrent with changes in landscape, deer harvest strategies, and increasing and expanding black bear (<i> Ursus americanus </i>) and coyote (<i> Canis latrans </i>) populations. Most studies have addressed this problem at small spatial and temporal scales and in areas where …
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Space Use and Survival of White-Tailed Deer in a Disturbance-Driven System Containing a Restored Apex Predator
… a function of intrinsic sex affects and landscape composition and configuration, and varies as resources and reproductive cycles fluctuate across seasons. Disturbance has little effect on space use, suggesting deer are well adapted to these disturbance regimes. Temperament in foraging …
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Spatial urban and peri-urban biodiversity patterns
… to determine the way they are influenced by landscape composition (land cover) and specific habitat characteristics. For this, the urban landscape was described in terms of an urbanisation gradient: the study area was stratified into three zones of decreasing urbanisation, namely the urban (> …
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Mechanisms underlying population dynamics of a migratory songbird in a fragmented forest
… gradients near edges. This suggests that the landscape composition (e.g., relative amount of forest and agriculture) was a major factor determining nest predation and cowbird parasitism levels. In my study sites, local population dynamics appeared to be governed by decision rules used by adult …
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Predicting favorable habitat for bobcats (Lynx rufus) in Iowa
… the programs ArcGIS and FRAGSTATS to calculate landscape composition and configuration from publicly available sources including landcover, census, road, hydrologic, and elevation data. I constructed classification and regression tree (CART) models to identify important variables for predicting …
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Landscape-scale mechanisms of biological pest control in a South Korean agricultural landscape
… of how to manage this service in real-world landscapes is limited by our lack of knowledge of the factors determining landscape-scale pest control, enemy diversity and the relationship between the two. In order to clarify how biological control is provided at large spatial scales, and how it …
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The impact of past land-use change on floristic diversity in southern Sweden : a quantitative approach based on high-resolution pollen data
… pollen data was applied, using the Landscape Reconstruction Algorithm (LRA), historical maps/aerial photographs, palynological richness and new ways to estimate past evenness at regional and local spatial scales, which enable estimates of the rate and degree of change in land-use and …
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Genetic population structure and dispersal of two North American woodpeckers in ephemeral habitats
… driven by geographic distance as opposed to landscape composition.</p> <p>Once I understood the primary mechanisms driving large-scale patterns, I determined the fine-scale spatial structure in both species. Black-backed woodpeckers apparently disperse twice as far as hairy woodpeckers based …
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