Graduate Project
 

Geographic location and ecoregional effects on determinants of avian species richness

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https://ir.library.oregonstate.edu/concern/graduate_projects/9c67wn533

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  • Biodiversity studies allow for a more holistic approach to the conservation of species. Using one measure ofbiodiversity, that ofspecies richness, this study investigates the correlations between bird species richness and a set ofvariables. These variables represent climate, productivity/available energy, habitat heterogeneity, disturbance, and topography. Another aspect ofthis study is to group the data contained within equal-area hexagons according to two levels oforganization. The large scope organized hexagons into the West Coast region and Chesapeake region. At the small scope, there were five groupings according to ecoregions within each ofthe larger regions. The resulting models show that differences in sign/lcant variables occur between regions and each ecoregion. These determinants ofbird species richness vary between the two regions because climate, landscape structure, and topography are processes that are acting differently to shape the distributions in richness. Determinants also vary between each ofthe ecoregion groups because these same processes producing different richness patterns. Further emphasized by this study is the importance of acknowledging the connectivity between ecosystems and species, this being important for the management and conservation ofbird species richness.
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  • File scanned at 300 ppi (Monochrome, 24-bit Color) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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