Nitrogen Fixation in Lakes

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Science  02 Oct 1959:
Vol. 130, Issue 3379, pp. 859-860
DOI: 10.1126/science.130.3379.859


Incorporation of N15 into the fixed nitrogen fraction of natural lake waters has been studied for the purpose of estimating rates of primary nitrogen fixation. Experiments in Pymatuning Reservoir, Pennsylvania, in Lake Mendota, Wisconsin, and in two lakes in Alaska indicate that fixation occurs at measurable, sometimes high, rates.