Research/Evaluate Restoration of NE Oregon Streams: Effects of Livestock Exclosures (Corridor Fencing) on Riparian Vegetation, Stream Geomorphic Features and Fish Populations; Final Report 2002. Page: 4 of 95
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SIGNIFICANT FINDINGS OF RESEARCH
Corridor fencing to exclude livestock grazing along Interior Columbia Basin streams is a
widely used approach to restore salmonids and their habitats. Yet few studies have
quantified the ecosystem response to this treatment. Vegetation, geomorphic features,
and fish populations were sampled in 11 riparian/stream ecosystems in Northeast Oregon.
At each stream we sampled two paired reaches - a reach grazed by livestock and one
exclosed by fencing. The following are the highlights of this study.
Vegetation
" We found significant differences in the cover, composition and structure of
vegetation in all grazed/exclosed reaches. In the majority of exclosed reaches
there were increases in the cover of forbs, shrubs, and sedges. Exposed bare
ground was more extensive in grazed reaches.
" Wetland indicator scores, based upon streamside vegetation composition, indicate
that cessation of livestock grazing results in a shift to more mesic wetland riparian
vegetation.2
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Kauffman, J. Boone. Research/Evaluate Restoration of NE Oregon Streams: Effects of Livestock Exclosures (Corridor Fencing) on Riparian Vegetation, Stream Geomorphic Features and Fish Populations; Final Report 2002., report, September 17, 2002; Portland, Oregon. (https://digital.library.unt.edu/ark:/67531/metadc740675/m1/4/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.