SEARCH Articles Figures Tables Biogeochemical Significance of Marine Nitrogen Fixation Carbon-nitrogen ratios marine organic matter Composition of Marine Dissolved Organic Nitrogen Dissolved organic nitrogen , marine Marine Combined Nitrogen Budget Marine dissolved organic nitrogen sources Marine ecosystems nitrogen isotopes Marine environment benthic nitrogen fixation Marine environment fixed nitrogen Marine macroalgae nitrogen limitation Marine nitrogen cycle Marine nitrogen cycle isotope budgets Marine nitrogen particulate organic Marine nitrogenous compounds Nitrogen Consumption and Metabolism in Marine Zooplankton Nitrogen Fixation in the Marine Environment Nitrogen Isotopes in Marine Sediments Nitrogen Stable Isotopes in Marine Environments Nitrogen and Marine Eutrophication Nitrogen compounds marine organic matter Nitrogen fixation marine Nitrogen in Past Marine Environments Nitrogen marine eutrophication Nitrogen-carbon ratios, marine organic Nitrogen-phosphorus ratio, marine organic Nitrogen-phosphorus ratio, marine organic matter Oceanic Biogeochemistry of Iron and Phosphorus with the Marine Nitrogen Cycle Role of Nitrification in the Marine Nitrogen Cycle The Role of Marine Macroalgae in Nitrogen Retention, Cycling, Turnover, and Loss The response of secondary production and fishery yield in coastal marine ecosystems to increased nutrient loads (primarily nitrogen) Total dissolved nitrogen , marine Tracer Methods for Studies of the Marine Nitrogen Cycle