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The Bottom Fauna in an Oil-Contaminated Lake

L. Bengtsson and H. Berggren
Ambio
Vol. 1, No. 4 (Sep., 1972), pp. 141-144
Published by: Springer on behalf of Royal Swedish Academy of Sciences
Stable URL: http://www.jstor.org/stable/4311966
Page Count: 4
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Abstract

In connection with a lake restoration project in which the hypolimnion was aerated, the distribution of the bottom fauna and the oil content of the sediment were studied. The oil content of the surface sediment is highest near the run-off water outlets from an industrial area and two filling stations. The high mineral oil content of the sediments seems to be an inhibiting factor. Although the hypolimnion aeration was a success, as the oxygen concentration was raised from almost zero to above 7 mg/l, the bottom fauna did not invade the bottom areas which had been anoxic earlier.

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