| The distribution of Heterotrissocladius oliveri Saether (Diptera: Chironomidae) in Lake Michigan | |
Abstract/OtherAbstract
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Fifty one chironomid species were identified from 504 samples collected at depths ranging 8 to 267 m in Lake Michigan, U.S.A. Heterotrissocladius oliveri Saether occurred in 32% of these samples and had an average abundance of 22 m −2 which was similar to other estimates from the Great Lakes. Maximum average lake-wide density was at 30 to 60 m (41 m −2 ). At depths ≥60 m, H. oliveri was the dominant chironomid species comprising 75% of total Chironomidae. The substrate preference of H. oliveri differed within each depth regime considered: at 30–60 m, 2–3 ϕ; at 60–120 m, 3–5 ϕ, 7–9 ϕ; and at 120–180 m, 6–8 ϕ. Abundance was notably reduced at all depths in substrates characterized as medium silt (5–6 ϕ). On a lake-wide basis, the distribution pattern suggested H. oliveri was most numerous from 30 to 60 m along the southwestern, eastern, and northern shorelines and at 60–120 m depths along the southern and eastern shorelines. Increased abundance in the South Basin was concurrent with evidence of increased sedimentation at 60 to 100 m. However, in several other areas of the lake, high densities were associated with medium to very fine sands relatively free of silts and clays. This observation suggested occurrence of H. oliveri was minimally affected by sediment type., Peer Reviewed, http://deepblue.lib.umich.edu/bitstream/2027.42/42871/1/10750_2004_Article_BF00008856.pdf |
Authors
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Winnell, Michael H., White, David S. |
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Contributors
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Great Lakes Research Division, Institute of Science and Technology, University of Michigan, 48109, Ann Arbor, MI, USA; Benthos Laboratory, University of Michigan, 1081 North University Building, 48109, Ann Arbor, MI, USA, Great Lakes Research Division, Institute of Science and Technology, University of Michigan, 48109, Ann Arbor, MI, USA; Benthos Laboratory, University of Michigan, 1081 North University Building, 48109, Ann Arbor, MI, USA, Ann Arbor |
Publication Detail
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Publisher : Kluwer Academic Publishers; Dr W. Junk Publishers ; Springer Science+Business Media Type : - Format : 778393 bytes, 3115 bytes, application/pdf, text/plain |
Date Detail
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2006-09-08, 2006-09-08, 1986/02 |
Subject
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Life Sciences, Ecology, Hydrobiology, Heterotrissocladius oliveri, Chironomidae, Diptera, Lake Michigan, distribution, abundance, Natural Resources and Environment, Ecology and Evolutionary Biology, Science |
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Copyright Information
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Other Details
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Languages : en_US |
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