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INTERNAL PHOSPHORUS LOADING IN A SHALLOW EUTROPHIC LAKE (JOURNAL VERSION)
Citation:
Jacoby, J., D. Lynch, E. Welch, AND M. Perkins. INTERNAL PHOSPHORUS LOADING IN A SHALLOW EUTROPHIC LAKE (JOURNAL VERSION). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-82/332.
Description:
Internal loading of phosphorus has been implicated as a major eutrophication factor in Long Lake, WA. As a result of such loading, summer total phosphorus concentrations approach or exceed 100 micrograms P/l. Most of the summer loading of phosphorus is thought to have been released directly from the rich sediment in the mid and northern part of the lake as a result of high pH (up to 10) related to phytoplankton photosynthesis. The lake also supports a dense submersed macrophyte crop composed primarily of Elodea densa. During the summer of 1980 internal loading of phosphorus was reduced and total phosphorus remained below 50 micrograms/l.