Dissertation/Thesis Abstract

Benthic macroinvertebrates in Uvas Creek, California, downstream of a reservoir
by Foster, Carole A., M.S., San Jose State University, 2014, 93; 1583489
Abstract (Summary)

I sampled macroinvertebrates in May, July, and October 2008 in Uvas Creek, a reservoir-regulated stream in south Santa Clara County, California, to assess what factors (including canopy closure, turbidity, and stream flow) downstream of the reservoir were related to food availability for rearing juvenile Steelhead (Oncorhynchus mykiss). I found benthic and drifting macroinvertebrate biomass was considerably greater during most months in the more open-canopied two sites in the downstream reach as compared to the densely shaded, more turbid and silty two sites in the upstream reach. Abundance of important drifting aquatic invertebrates in May (chironomids, simuliids, and baetids) was proportional to benthic abundance, but large hydropsychids were relatively scarce in the drift. Terrestrial drift abundance correlated with canopy density, but differences were small compared to the substantial increase in aquatic drift in sunnier sites. Thinning of the canopy at select locations and reduction of sediment input to Uvas Creek and its tributaries due to vineyard and other operations could increase benthic macroinvertebrate productivity in the upstream reach, which would increase food availability for rearing juvenile Steelhead.

Indexing (document details)
Advisor: Smith, Jerry J.
Commitee: Fend, Steven V., Messina, Paula
School: San Jose State University
Department: Biological Sciences
School Location: United States -- California
Source: MAI 54/03M(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Entomology, Conservation, Natural Resource Management
Keywords: Benthic macroinvertebrates, California, Drift, Steelhead, Uvas Creek
Publication Number: 1583489
ISBN: 9781321547559
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