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 69 for “"Vegetative cover"”.
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RESTORATION OF NATIVE PLANT COMMUNITIES AFTER ROAD DECOMMISSIONING: EFFECT OF SEED MIX AND SOIL PROPERTIES ON VEGETATIVE ESTABLISHMENT
… species diversity, and seeding density on vegetative establishment, and 3) impact of overstory canopy and coarse woody debris on revegetation success on recently decommissioned roads. Total vegetative cover declined by 60% one-year after decommissioning, with nonnative plants showing the …
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RESTORATION OF NATIVE PLANT COMMUNITIES AFTER ROAD DECOMMISSIONING: EFFECT OF SEED MIX AND SOIL PROPERTIES ON VEGETATIVE ESTABLISHMENT
… species diversity, and seeding density on vegetative establishment, and 3) impact of overstory canopy and coarse woody debris on revegetation success on recently decommissioned roads. Total vegetative cover declined by 60% one-year after decommissioning, with nonnative plants showing the …
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Modeling Detection and Density Using Distance Sampling for Three Priority Grassland Bird Species in Texas - Northern Bobwhite (Colinus virginianus), Eastern Meadowlark (Sturnella magna), and Painted Bunting (Passerina ciris)
… influenced by the Palmer Drought Severity Index. Vegetative cover was selected in the top density model for all three species. Native grasslands positively influenced density of Northern Bobwhite and Eastern Meadowlarks, shrubland positively influenced Northern Bobwhite and Painted Bunting, and …
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Understanding gully process in two Kansas landscapes
… data and land characteristics such as soils, vegetative cover, slope, and drainage area were compiled into a database to be compared to gully erosion rates in an attempt to correlate gully erosion not only to rainfall but to other land-based factors. Results show that for most Fort Riley …
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Erosion control with vegetation in highway corridors
… by mulches, but perfected by developing a vegetative cover quickly. The speed of developing a vegetative cover and shifts in plant biota to persistent covers depend on grading and subsoil preparation, soil amendments, mulches, and specially designed seed mix:tures for seeding at various …
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Factors Affecting Denitrification Potential and the Microbial Ecology of Established Bioretention Cells Across the Eastern Mid-Atlantic Region
… of recent BRC designs. Results indicate that BRC vegetative cover, soil media nitrogen, and organic carbon concentrations are among the variables that facilitate nitrifying and denitrifying bacteria populations in BRCs. Bacterial community composition was most different between the top and bottom …
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Assessing Black-capped Vireo (Vireo atricapillus) Breeding Habitat based on Size, Spatial Distribution, and Plant Species in Shrub Mottes at Kerr Wildlife Management Area, Texas
… BCVs inhabit areas with greater heterogeneity in vegetative cover. Vegetative cover in BCV habitat is composed of low deciduous shrubs with lateral branching to the ground. Openness, or distance between shrubs, is another important feature of heterogeneity as well as BCV habitat. The objective of …
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The effects of grassland management practices, and the role of hedgerows, on farmland carbon sequestration and storage
… temporary releases of CO2 due to the removal of vegetative cover. Spring ploughing resulted in higher flux rates, however due to more rapid vegetation establishment less CO2 was released than ploughing in autumn. Land use change also resulted in releases of CO2 due to removal of vegetative cover. …
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The Effects of Food, Cover and Competition on Demography, Dispersal and Density of Voles
… availability of high quality food and amount of vegetative cover. I tested a series of a priori hypotheses regarding the effects of habitat quality on the movement of individuals between habitats. These hypotheses included the ideal-free distribution and the ideal-despotic distribution …
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CHARACTERIZING PATTERNS IN TEXAS GULF COAST BEACH DUNE PLANT SPECIES COMPOSITION
… differ in terms of percent bare sand, percent vegetative cover, and species richness. Cluster Analysis, ANOSIM, and SIMPER results indicate that Texas beaches can be divided into northern and southern regions based on differences in species composition of plant communities. Indicator Species …
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Factors affecting piping plover (Charadrius melodus) nest site selection following landscape and predator community changes
… We analyzed classified imagery to quantify vegetative cover changes across the landscape and at nest sites. Results showed an increase of 11.5% change in vegetative cover across the study area, and nest sites experienced an increase in vegetation cover from 0.1% to 6.2% between 2015 and …
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SOIL QUALITY INDICATORS AND VEGETATION RESPONSES FOLLOWING ECOLOGICAL RESTORATION THINNING OF PONDEROSA PINE ON THREE SOIL PARENT MATERIAL TYPES UNDER GRAZING AND NON-GRAZING IN NORTHERN ARIZONA
… basalt- and benmoreite-derived soils.</p> <p>Vegetative cover and species richness were affected by forest treatment type, soil parent material type, grazing treatment, and measurement year, depending on life form, longevity, and nativity. As observed by Abella et al. (2015), responses were …
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Anura of Eastern South Dakota: Their Distribution and Characteristics of Their Wetland Habitats, 1997-1998
… found in permanent wetlands. Wetlands within all vegetative cover categories provided habitat for the majority of anuran species. Despite apparent associations between anuran occurrence and vegetative cover conditions, no relationships were statistically significant. Although preferential …
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Infaunal Abundance and Diversity in Vegetated and Unvegetated Areas of a Georgia Salt Marsh
… these infauna has been shown to be influenced by vegetative cover. In 2001, salt marshes along the coast of Georgia began to die, resulting in the loss of the dominant vegetation. During the summer of 2005, six 0.5 x 0.5 meter quadrats were haphazardly placed and set up permanently in the low …
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Throughfall variation in a mixed deciduous forest
… to storm characteristics, irregularities of vegetative cover, and different concentrations of throughfall at single sampling positions. Coefficients of variation decreased with increasing amounts of gross rainfall. Throughfall amounts increased with decreasing canopy density over plots. …
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Investigation of how vegetation, small mammal interactions, and land-use determine blacklegged tick abundance
… habitats, a moist microclimate provided by ample vegetative cover is necessary to ensure tick survival. My study examined the distribution of ticks in the greater Rochester, NY area at both of these spatial scales. In the first half of my project, I collected ticks from plots dominated by invasive …
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Modeling Best Management Practices on Flow and Sediment using the Rangeland Hydrology and Erosion Model
… Watershed were simulated by adjusting the land-cover and dominant vegetation type to represent rangeland in poor, fair, and good ground-cover conditions. The management of other land uses in the watershed was assumed to remain constant through the simulation period. The three different land-use …
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Using Resident Small Mammals to Assess the Habitat Potential of Experimental Biofuels Feedstocks
… were negatively correlated with increases in vegetative cover of plots. Year was a significant factor effecting home range, with home ranges being smaller in 2012 than in 2011. Male deer mice had larger home ranges than females (Male = 2,760 m2, Female = 1,923 m2; P = 0.0443). No …
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Impact of Grazing Systems on Rodent and Cottontail Rabbit Populations in South Texas
… Vertical and horizontal components of vegetative structure were measured in terms of percent cover. There was paucity of rodents on the Welder Refuge – 8 captures for 9705 trap nights. In 1984 127 cottontails/km) and in 1985-1986 64 cottontails were seen along 436.8 km of road transects …
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Targeting of Ecosystem Goods and Services:Directing Agri-Environmental Policy Innovation
… greater areas of wetlands and natural vegetative cover. Thus, targeted policy enrolled land will provide greater wildlife habitat and other environmental benefits compared to the baseline landscape which represents a non-targeted land enrollment and hence increase the environmental …
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