Eutrophication symptoms

Symptoms of eutrophication such as Taste and odor problems in drinking algal blooms in lakes clarity of water... 

Therefore, preservation of acceptable water quahty and reversal of eutrophication in these systems will invariably include reductions of current loads and setting limits on new N input, either alone or in combination with other nutrient (e.g., P) input reductions. Freshwater nutrient management has, in many instances, successfully arrested and reversed eutrophication by reducing P loadings (Edmondson, 1970 Likens, 1972 VoUenweider, 1982). Indeed, the upstream freshwater portions of many estuaries are also P-Hmited (Boynton and Kemp, 2000 Fisher et al, 1999), and P input constraints in these waters have been quite successful in reducing the unwanted symptoms of eutrophication (nuisance algal blooms, toxicity, hypoxia,... 

Reduction of the visible symptoms of eutrophication (i.e., green scum) can be achieved by various methods. An indirect method that has received considerable attention, although it is still in the experimental phase, is biomanipulation or the manipulation of aquatic food chains to reduce phytoplankton biomass. The idea is to reduce predation on aquatic grazers such as large zooplankton, which feed on phytoplankton. This method has proven successful in increasing water transparency and dissolved oxygen concentrations and reducing phytoplankton biomass (Shapiro and... 

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