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Terrestrial and Aquatic Ecology Commons™
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Full-Text Articles in Terrestrial and Aquatic Ecology
Small Mammal Microhabitat Use And Species Composition At A Wildlife Crossing Structure Compared With Nearby Forest, Lindsay Millward, Kristina Ernest
Small Mammal Microhabitat Use And Species Composition At A Wildlife Crossing Structure Compared With Nearby Forest, Lindsay Millward, Kristina Ernest
All Master's Theses
Expanding transportation corridors have fragmented ecosystems throughout the world, restricting the movement of organisms or acting as complete connectivity barriers. Wildlife crossing structures (WCS) can increase the permeability of roads, allowing animals to move safely between habitats. Small mammals are especially vulnerable to the effects of reduced connectivity because of their limited mobility; however, few studies have evaluated their use of WCS. This study was conducted at a WCS under I-90 near Snoqualmie Pass, Washington. Our objective was to evaluate the small mammal species composition at the wildlife undercrossing in comparison to adjacent restoration sites and to the nearby forest. …
Occupancy Of Stream-Associated Amphibians Within The Interstate 90 Snoqualmie Pass Corridor, Anne Gustafson
Occupancy Of Stream-Associated Amphibians Within The Interstate 90 Snoqualmie Pass Corridor, Anne Gustafson
All Master's Theses
Detection of stream-associated amphibians in visual encounter surveys is challenging due to their cryptic nature; however, occupancy models were developed to deal with these detectability problems and provide estimates of occupancy that can also be related to site characteristics. Highway crossing risks and habitat isolation were mitigated for in recent construction of wildlife underpasses, where creeks cross Interstate 90 east of Snoqualmie Pass in Washington State. The effects of these restored underpasses on stream-associated amphibians were evaluated across 8 creeks, some with and some without restored underpasses, by comparing modeled occupancy of 3 amphibian species in stream habitat upstream, under, …