Effects of artificial destratification on zooplankton of two Oklahoma reservoirs |
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Authors: | Nancy L McClintock Jerry Wilhm |
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Institution: | (1) School of Biological Sciences, Oklahoma State University, 74074 Stillwater, OK |
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Abstract: | Species composition and diversity of zooplankton were observed in two lakes undergoing destratification attempts. Twenty-five
and twenty-four taxa were collected from Ham's and Arbuckle Lake, respectively. Species composition and density were similar
to other area reservoirs, while diversity values (d) were consistently lower. No correlation was observed between depth and
number of species or depth and diversity. Density tended to decrease with depth. Densities were lowest in April and August
in Ham's Lake and in August in Arbuckles Lake. In both lakes, density was highest in May. Ham's Lake was artificially destratified
by the pumping, while Arbuckle Lake was not destratified during the study. Although some temporal variation in species numbers
and densities possibly reflected limited oxygen concentrations, the changes could not be directly related to physicochemical
conditions of the lakes. Variations are probably due in part to seasonal population dynamics of the zooplankton. No correlation
was observed between diversity and time.
Research supported with funds from the Oklahoma Water Resources Research Institute and the Bureau of Reclamation.
Research supported with funds from the Oklahoma Water Resources Research Institute and the Bureau of Reclamation. |
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Keywords: | Zooplankton destratification species diversity density reservoirs |
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