Impacts of a fire-flood event on physical and biological characteristics of a small mountain stream / Mark Anthony Novak.
Material type:
TextSeries: Thesis. (M.S.)Publication details: Bozeman, MT : Montana State University, 1988.Description: xii,98 leaves : ill. ; 28 cmOnline resources: Abstract: A forest fire burned 4811 ha of the lower Beaver Creek drainage and was followed by an intense convectional rainstorm causing extensive soil erosion. Runoff from the event caused physical and biological degradation of the stream. This study evaluated recovery of trout and aquatic macroinvertebrates, use of the stream by spawning adfluvial rainbow trout, emigration of young-of-the- year rainbow trout to the Missouri River, and changes in substrate composition. Two months after the fire and flood trout populations in the impacted portion of the stream were nearly eliminated; within 2 years, numbers of age-0 to age-III rainbow trout had increased to 5978/ha (68.68 kg/ha), compared to an abundance of 3841/ha (49.34 kg/ha) before the event. The resident brown trout stock did not recover during the period of the study.Numbers of adfluvial rainbow trout spawners using Beaver Creek did not differ significantly from pre-event years, however, there was a large increase in recruitment of young-
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Thesis(M.S.)--Montana State University, 1988.
"July 1988."
Includes bibliographical references (leaves 70-76).
A forest fire burned 4811 ha of the lower Beaver Creek drainage and was followed by an intense convectional rainstorm causing extensive soil erosion. Runoff from the event caused physical and biological degradation of the stream. This study evaluated recovery of trout and aquatic macroinvertebrates, use of the stream by spawning adfluvial rainbow trout, emigration of young-of-the- year rainbow trout to the Missouri River, and changes in substrate composition. Two months after the fire and flood trout populations in the impacted portion of the stream were nearly eliminated; within 2 years, numbers of age-0 to age-III rainbow trout had increased to 5978/ha (68.68 kg/ha), compared to an abundance of 3841/ha (49.34 kg/ha) before the event. The resident brown trout stock did not recover during the period of the study.Numbers of adfluvial rainbow trout spawners using Beaver Creek did not differ significantly from pre-event years, however, there was a large increase in recruitment of young-