Nutrients such as nitrogen and phosphorus are important for aquatic ecosystem health. Excessive amounts of nutrients, however, can make aquatic ecosystems harmful for biota because enhanced growth and decay cycles of aquatic algae can reduce dissolved
Sheibley, Rich W. sheibley@usgs.gov,Konrad, Christopher P. cpkonrad@usgs.gov,Black, Robert W. rwblack@usgs.gov. Nutrient attenuation in rivers and streams, Puget Sound Basin, Washington. 2015-01-01.