Skip to Main Content
Riparian and upland small mammals on the east slope of the Cascade Range, WashingtonAuthor(s): John F. Lehmkuhl; Roger D. Peffer; Margaret A. O'Connell
Source: Northwest Science. 82(2): 94-107
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (3.0 MB)
DescriptionDifferences in small mammal diversity and abundance between riparian and upland areas have not been consistently shown in the Pacific Northwest, and the issue is expected to be complex along the east slope of the Cascade Range with its complex biogeography and forest landscape structure. The information is important for evaluating buffer zone management and the potential impacts of fuel reduction projects. We quantified small mammal species' abundances, diversity, and indicator species in riparian and upland forest along three third-order streams. Each location had a set of four 5 by 6 pitfall kill-trapping grids with 15-m spacing and the first grid row 5 m from the water. One site had an additional set of four grids. We trapped for 2 weeks during late June and early July in 1997 and 1998 for a total trap effort of 13,411 trap nights. We captured 1,104 individuals of 14 species. Insectivores were 69 percent and rodents 31 percent of the captures. Sorex trowbridgii was the most abundant species (54 percent of all captures). Peromyscus keeni and P. maniculatus combined dominated the rodent community with 43 percent of rodent captures. Species richness and individuals captured generally were highest within 20 to 35 m of the stream. Sorex palustris, P. keeni, Microtus longicaudus, S. vagrans, and Zapus princeps showed strong affinities to the immediate riparian zone (~5 m from the stream). No species were indicators or most abundant in the upland forest away from the riparian areas. Refuge and corridor functions for small mammals in riparian areas would be maintained by current buffer-width standards of 60 to 100 m.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationLehmkuhl, John F.; Peffer, Roger D.; O''Connell, Margaret A. 2008. Riparian and upland small mammals on the east slope of the Cascade Range, Washington. Northwest Science. 82(2): 94-107
KeywordsRiparian, buffer zone, small mammals
- Response of terrestrial small mammals to varying amounts and patterns of green-tree retention in Pacific Northwest forests
- Initial response of small ground-dwelling mammals to forest alternative buffers along headwater streams in the Washington Coast Range, USA
- The riparian ecosystem management study: response of small mammals to streamside buffers in western Washington
XML: View XML