Nitrogen Constrains the Growth of Late Summer Cyanobacterial Blooms in Lake ErieReport as inadecuate




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Phosphorus P is generally considered to be the main limiting nutrient to freshwater phytoplankton productivity. However, recent research is drawing attention to the importance of nitrogen N in freshwater eutrophication and N often constrains growth of cyanobacteria in small lakes. In this study we determined phytoplankton nutrient limitation in a large lake, Lake Erie during two growing seasons. During 2010 and 2011, nutrient enrichment bioassays +P, +N and, +P and N were conducted monthly from June through September with water collected in Maumee Bay site MB18 and in the center of the western basin site WBC. Nutrient concentrations were monitored every other week. At MB18, total P concentration was often >3 mmol-L and nitrate concentration decreased from >250 mmol-L in early summer to



Author: Justin D. Chaffin, Thomas B. Bridgeman, Darren L. Bade

Source: http://www.scirp.org/



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