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The C:N:P ratio of plankton and its significance for nutrient cycling in Lakes.
Yasuhiko Tezuka 江原大學校 附設 環境硏究所 1992 環境硏究 Vol.9 No.-
In the main (north) basin of Lake Biwa, an oli해-meso-trophic and phosphorus-limited lake in central Japan, and abundant accumulation of nitrate in the hypolimnion was observed during the stagnation period, in contrast with no such accumulation of phosphate. In order to clarify the mechanism of this phenomenon, seston was collected in summer from both epilimnion and hypolimnion of Lake Biwa and decomposed aerobically for three months in the laboratory. A large amount of nitrate but not phosphate was released from decomposing seston. The reason for this different release pattern of nitrate and phosphate was attributed to the high C:P and N:P ratios of the plankton grown in severely phosphorus-limited environment of Lake Biwa. Thus, it was concluded that the C:N:P ratio of plankton plays an important role in the recycling of nitrogen and phosphorus in lakes.