ABSTRACT:During the winter of 1972 nutrient concentrations beneath the ice, and snow when present, were measured at three stations in Lake St. Clair. Nutrient patterns are compared and discussed in relation to primary production.Typically nutrient concentrations were high for a few weeks after ice formation and high again in the spring with mid‐winter declines. At station 3 soluble reactive silica appeared to influence primary production and chlorophyll a. Nutrient limitation was not detected at the other two stations. The nutrient patterns, primary production and temperature provide evidence that a water mass or plume peculiar to the inflowing Thames River moves down the southeastern side of the lake beneath the ic
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