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Small mammal assemblages in natural and restored wet prairies: an evaluation of habitat in Oregon's Willamette Valley Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_projects/dv13zt98t

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  • This study was conducted to explore differences in diversity and abundance of small mammal populations in natural and restored wet prairies in Oregon's Willamette Valley. Mammals were live-trapped in eight Willamette Valley wet prairies (four natural remnants and four restorations) during the summer of 2000; population abundance estimates for each species under study were computed using Program CAPTURE. Data were analyzed using a multiple scale approach to include patterns and relationships that might be apparent at differing scales. Within site analysis examined vegetation structure and habitat composition, potential effects of fire, and susceptibility to predation. Arcview GIS technologies were used to assess landscape characteristics at 500, 5,000, and 10,000-meter scales to typify study areas by the landscapes in which they occur. Wet prairie remnants did not differ significantly from restorations in size of Willamette Valley small mammal populations. Further, variation in population abundance appears to be determined by local resource availability and structure of microhabitat while species diversity may be influenced by proximity to heterogeneous environments.
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