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5. CONCEPTUAL MODEL OF AQUATIC PLANT DECAY AND AMMONIA TOXICITY FOR SHALLOW LAKES

Author

Farnsworth-Lee, Leslie A. and Baker, Lawrence A.

Subjects
Ammonia -- Environmental aspects, Lakes, Plankton populations -- Environmental aspects, Engineering and manufacturing industries, Environmental issues
Abstract

A conceptual process model was developed to examine the potential for late summer ammonia toxicity in shallow lakes. Processes represented in the model were macrophyte decay; growth, death, and sedimentation of phytoplankton; growth and death of zooplankton; nitrification; volatilization; and chemical equilibria (carbonate and ammonium systems). Peak NH(sub 3) concentrations occur at the peak of the phytoplankton bloom that develops about 2 weeks after macrophyte decay starts, when the pH is elevated. Ammonia peaks are highly transient, lasting

Published
2000

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