Impact of Deferred Rotation Grazing on Stream Characteristics in Central Nevada: A Case Study

Autor:	Thomas J. Myers, Sherman Swanson
Rok vydání:	1995
Předmět:	Hydrology geography geography.geographical_feature_category Ecology Flooding (psychology) Sediment STREAMS Management Monitoring Policy and Law Aquatic Science Structural basin Rotation Habitat Grazing Environmental science Ecology Evolution Behavior and Systematics Riparian zone
Zdroj:	North American Journal of Fisheries Management. 15:428-439
ISSN:	1548-8675 0275-5947
DOI:	10.1577/1548-8675(1995)015<0428:iodrgo>2.3.co;2
Popis:	Three central Nevada streams were selected to study the watershed-scale effects on stream morphology and bank stability of deferred rotation cattle grazing, complete rest from grazing, and the presence of road crossings. The streams had gravel substrates, and their entrenchments, width : depth ratios, sinuosities and gradients were moderate. Based on statistical analysis of 1980 stream survey results, geologic basin features, and the occurrence of similar flooding, we concluded that the three streams had similar conditions at the start of the grazing treatment. Since 1980, deferred rotation grazing allowed much improvement of aquatic and riparian habitats but the improvement was limited by the presence of roads, which apparently added sediment to the streams. Complete rest from grazing without the presence of roads allowed the most improvement. Of the variables measured in the 1980 survey, streambank soil stability, type and amount of vegetation cover, and quality of pools improved most in all th...
Databáze:	OpenAIRE
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