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A COMPARATIVE STUDY OF LAKE MICHIGAN MACROBENTHOS 1
Author(s) -
Andrew Robertson,
Wayne P. Alley
Publication year - 1966
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1966.11.4.0576
Subject(s) - benthos , abundance (ecology) , ecology , environmental science , oligochaeta (plant) , biology , zoology , benthic zone
A 1964 study of Lake Michigan benthos was conducted to compare with the results of studies made by Eggleton in 1931 and 1932. The dominant organisms, the amphipod Pontoporeia affinis, oligochaetes, and sphaeriids, were the same in the two studies. In both cases there was a concentration of Pontoporeia at approximately 40 m and indication of another at approximately 100 m. Neither our data nor Eggleton’s show significant differences in abundance of Pontoporeia or oligochaetes between May, June, and July. There were 1.5 times more Pontoporeia, 2.6 times more oligochaetes, and 4.3 times more sphaeriids, all significant differences, in 1964. At matched pairs of stations from the two studies, there were significantly more Pontoporeia and oligochaetes in 1964, but this was not true for sphaeriids.