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Riparian communities associated with Pacific Northwest headwater streams: assemblages, processes, and uniqueness

Journal of the American Water Resources Association

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Abstract

Riparian areas of large streams provide important habitat to many species and control many instream processes a?? but is the same true for the margins of small streams? This review considers riparian areas alongside small streams in forested, mountainous areas of the Pacific Northwest and asks if there are fundamental ecological differences from larger streams and from other regions and if there are consequences for management from any differences. In the moist forests along many small streams of the Pacific Northwest, the contrast between the streamside and upslope forest is not as strong as that found in drier regions. Small streams typically lack floodplains, and the riparian area is often constrained by the hillslope. Nevertheless, riparian-associated organisms, some unique to headwater areas, are found along small streams. Disturbance of hillslopes and stream channels and microclimatic effects of streams on the riparian area provide great heterogeneity in processes and diversity of habitats. The tight coupling of the terrestrial riparian area with the aquatic system results from the closed canopy and high edge-to-area ratio for small streams. Riparian areas of the temperate, conifer dominated forests of the Pacific Northwest provide a unique environment. Forest management guidelines for small streams vary widely, and there has been little evaluation of the local or downstream consequences of forest practices along small streams.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Riparian communities associated with Pacific Northwest headwater streams: assemblages, processes, and uniqueness
Series title:
Journal of the American Water Resources Association
Volume
41
Issue:
4
Year Published:
2005
Language:
English
Contributing office(s):
Forest and Rangeland Ecosystem Science Center
Description:
p. 935-957
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of the American Water Resources Association
First page:
935
Last page:
957
Number of Pages:
23