Ocean Response Coastal Analysis System (ORCAS)
NATIONAL HEALTH AND ENVIRONMENTAL RESEARCH LAB GULF BREEZE FL
Pagination or Media Count:
Phytoplankton populations and communities respond to nutrient inputs on time scales from days to weeks. This short-term variability is superimposed on the long-term seasonal, annual and interannual variability in estuarine biogeochemical cycling that together regulate food web dynamics and ecosystem responses to nutrient loadings. Quantifying this short-term variability within the context of long-term changes in phytoplankton community structure including harmful algal blooms, growth and production, relationships to physico-chemical factors, food web efficiency and ecosystem ascendancy will provide critical information to assess nutrient thresholds for hypoxia and food web shifts. One of the long-term goals of the Gulf Ecology Division is to support EPA s efforts under the Clean Water Action Plan by establishing the scientific basis developing nutrient criteria for the Nation s coastal receiving waters.