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 83 for “"ecoregion"”.
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Marine ecosystem classification and conservation targets within the Agulhas ecoregion, South Africa
… their environmental drivers along the Agulhas ecoregion outer shelf, shelf edge and upper slope to support marine ecosystem classification and mapping, and (ii) to determine the conservation targets for selected national marine ecosystem types to inform improved management of the marine …
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Simulation of protected area and forestry cutblock design in the boreal plain ecoregion
… posed by stakeholders in the boreal plain ecoregion regarding the strategic placement of protected areas and forestry cutblocks on the retention of ecological integrity. I found that neither strategic placement nor size significantly affect the retention of ecological integrity within …
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Diet analysis of wintering waterfowl in the Southeastern United States in relation to ecoregion, habitat, and guild
… understanding of waterfowl foraging based on ecoregion, guild, and habitats of wintering waterfowl, especially within the Mississippi Flyway. This study investigated the stomach content of wintering waterfowl in the Southeast United States, within the Mississippi Flyway region. The esophagus, …
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The use of right of ways by primary burrowing crayfishes in the Ouachita Mountains Ecoregion of Arkansas
… for these two species in the Ouachita Mountains Ecoregion (OME) of western Arkansas in the spring of 2014 and 2015. My first objective was to determine the fine-scale habitat preferences of F. harpi and P. reimeri in relation to their occurrence in roadside ditches. My analysis revealed these …
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Impacts of Land Cover Changes on Ecosystem Services Delivery in the Black Hills Ecoregion from 1950 to 2010
… ecosystem services delivery in the Black Hills ecoregion resulting from land cover modifications over a 60-year period. The trajectories of change in the Black Hills land cover are quantified using manual land cover mapping on aerial photographs from circa 1950 and circa 2010. In the second …
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A multi-scale, hierarchical approach to map the location and condition of riparian zones in the southern Rockies ecoregion
… the approach for the Southern Rockies Ecoregion. Third, I estimate riparian condition using a straightforward, cost-effective approach at management relevant scales (i.e. reach) and evaluate the dominant ecological and physical processes and anthropogenic stressors that impact riparian …
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The influence of sampling method on detecting benthic biodiversity patterns at the ecoregion scale on the South African west coast
… of stations within the Southern Benguela Shelf ecoregion on the west coast of South Africa (70 – 600 m) between the years 2009 and 2020. Differences in benthic structure, univariate diversity indices, and multivariate assemblage structure were compared between demersal trawl and grab datasets …
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Effects of Prescribed Fire Regimes on White-tailed Deer (Odocoileus virginianus) Browse, Forage, and Nutrient Availability in the Pineywoods Ecoregion of Texas
<p>Fire is a management tool for white-tailed deer (<em>Odocoileus virginianus</em>) habitat, influencing browse availability, herbaceous production, and nutrient content. In 2020 and 2021, this study utilized 46 plots across East Texas to assess these habitat components. A stem count index survey …
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Between a bass and a hard place: the fragmented distribution of an endangered redfin in the Heuningnes River System of the Cape Fold Ecoregion
… introduction of nonnative species. The Cape Fold Ecoregion (CFE) of South Africa is recognised as a hotspot for freshwater fish endemism. It is also recognised as one of six hotspots for freshwater fish invasions. Hence, 36% of native and 66% of endemic freshwater fish are considered threatened …
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Studies of Benthic Macroinvertebrate Use for Biomonitoring of Mid-Atlantic Highland Streams
… to the best that can be found in the Blue Ridge ecoregion. Land use in SNP (mostly for recreational purposes) does not appear to be causing impairment to the macroinvertebrate assemblages. Streams in the SNP were found to recover quickly from disturbance. The Macroinvertebrate Aggregated Index …
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Biotic Integrity in the Northwestern Great Plains and Mechanisms Regulating Stream Condition in South Dakota
… an IBI for the Northern Glaciated Plains ecoregion in eastern SD (Krause et al. 2013). Prior to this survey the condition of the majority of SD’s streams was unknown. As the SD DENR expands biological monitoring into the Northwestern Great Plains ecoregion, multimetric indices. Western …
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Landscape & meteorological drivers of burn severity in the southern Rockies
… severity of wildfires in the Southern Rockies Ecoregion over recent decades requires a comprehensive assessment of the drivers of burn severity. This study uses Random Forest models to analyze the relative importance of landscape and meteorological variables in determining burn severity across …
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A Comparison of Land Use and Land Cover in Public Lands of the Northwestern Great Plains and High Plains Ecoregions and the Implications For Grassland Birds
… avian species richness. My study focused on two ecoregions, the Northwestern Great Plains and the High Plains, which comprise a substantial portion of the U.S. Great Plains, the continental Central Flyway for migratory bird species. The Great Plains provide critical nesting habitat for grassland …
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Brook Trout Population Genetic Tools for Natural Barriers in Fragmented Subwatersheds
… alleles per sample differed between Level III Ecoregions. In chapter 2 I tested the hypothesis that the presence of a barrier, total habitat potentially isolated above a barrier (km), road density, and percent forest cover within a subwatershed (USGS 6th-level Hydrologic Units) were significant …
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Studies of Benthic Macroinvertebrates in Western Virginia Streams as Related to the Implementation of Rapid Bioassessment Techniques
… regional biocriteria: (1) the accuracy of the ecoregion classification framework and (2) the accuracy of standardized qualitative sampling. Except for the Central Appalachians ecoregion, there was little or no correspondence of benthic macroinvertebrate distribution with the ecoregions or …
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The Effects of Nutrient Concentrations on Macroinvertebrate Distributions in Georgia
… different varied across the state, varied at ecoregion level and varied at subecoregion within an ecoregion; (3) the data indicated some correlations between nutrients and macroinvertebrate distribution, however the RBP was not a good indicator of nutrient loading in all ecoregions and …
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How does surface mining impact surrounding miombo woodland bird communities?
… is located roughly in the centre of the miombo ecoregion, a biodiverse area that is listed as a global conservation priority, which provides ecosystem services that support over 100 million livelihoods. Despite its ecological and social importance, research on the impacts of mining and possible …
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