Factors affecting depth distribution of dragonflies and other benthic insects in a thermally destabilized reservoir |
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Authors: | James H Thorp Maureen R Diggins |
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Institution: | (1) Savannah River Ecology Laboratory, P.O. Drawer E, 29801 Aiken, SC, U.S.A.;(2) Department of Biology, Augustana College, 57102 Sioux Falls, SD, U.S.A. |
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Abstract: | The distribution and abundance of macroinvertebrates along a water depth gradient were studied in thermal and ambient temperature areas of a reservoir in the southeastern United States. Benthic samples were taken at 10 depths (0.16–5 m) during January–April, 1978. Factors affecting the depth distribution of Ceratopogonidae, Chaoboridae, Chironomidae, Ephemeroptera, Odonata, and Trichoptera are discussed. The relationship between abundance of organisms and water depth was more complex than an inverse relationship generally reported in the literature. |
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Keywords: | benthos depth distribution Diptera dragonfly Ephemeroptera Odonata reservoir South Carolina thermal effluent Trichoptera |
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