Nitrogen and Marine Eutrophication

Nutrient, Physical and Climatic Controls of Marine Eutrophication 54° 

Is Nitrogen Nitrogen Roles of Different Nitrogen Sources in Marine 

Neuse River Estuary North Carolina croatan 

PRINCIPAL OXIDIZED NITROGEN AIRSHEDS FOR NARRAGANSETT BAY, CHESAPEAKE BAY, PAMLICO SOUND, TAMPA BAY, MOBILE BAY, LAKE PONTCHARTRAIN 

DEVELOPED BY R. DENNIS. ATMOSPHERIC SCIENCES MODELING DIVISION ARL, NOAA, and NERL USEPA 

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Paerl, H. W., and WhitaU, D. R. (1999). AnthropogenicaUy-derived atmospheric nitrogen deposition, marine eutrophication and harmful algal bloom expansion Is there a hnk Ambio 28, 307—311. 

Marino, 2006 NRC, 1993, 2000). At the national scale, policy makers and water-quality managers often did not consider or accept the evidence for nitrogen control of eutrophication in coastal marine ecosystems, in part because of the political legacy left from heated debates in the 1960s and 1970s over whether phosphorus or carbon caused eutrophication in lakes (Howarth and Marino, 2006 NRC, 2000). Some... 

Because an increased supply of nitrogen in marine waters and/or phosphorus in freshwaters is typically responsible for eutrophication, directly measuring the concentration of these nutrients can indicate trophic state. Nutrients in water are either dissolved or bound to particulates produced in situ and deposited into water bodies from groundwater, atmospheric deposition, and drainage basin runoff. To measure trophic state, nutrient concentrations are measured in samples... 

Despite the role of phosphorus as one vital nutrient, the distributions and dynamics of marine phosphorus pools are less well characterized in comparison with those of the bioelements carbon and nitrogen (Suzumura and Ingall, 2004). Phosphorus is the key element for phytoplankton growth and one of the factors in coastal estuarine and seawater eutrophication. Recently, phosphorus has been observed to limit phytoplankton production in both coastal waters and the open sea. 

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