Record Display for the EPA National Library CatalogRECORD NUMBER: 3 OF 4
|Main Title||Role of Benthic Communities in the Nitrogen and Phosphorus Cycles of an Estuary.|
|Author||Hale., Stephen S. ;|
|CORP Author||Rhode Island Univ., Kingston. Graduate School of Oceanography.;National Oceanic and Atmospheric Administration, Rockville, Md. Office of Sea Grant.;Environmental Protection Agency, Washington, D.C.|
|Report Number||Marine Reprint-57; NOAA-04-3-158-3 ;EPA-T-900140-04; NOAA-76070808;|
|Stock Number||PB-258 505|
|Additional Subjects||Estuaries ; Benthos ; Benthonic zone ; Narragansett Bay ; Underwater environments ; Phosphorus ; Nitrogen ; Water analysis ; Sediments ; Nutrients ; Food chains ; Oxygen ; Rivers ; Temperature ; Ammonia ; Rhode Island ; Ecosystems ; Reprints ; Sea Grant program ; Ampelisca abdita ; Nepthys incisa ; Nucula annulata ; Mercenaria mercenaria|
A study of net sediment-water fluxes of ammonia, nitrate, nitrite, and inorganic phosphate was conducted in Narragansett Bay, Rhode Island, from July 1973 to January 1974 to examine the role of benthic communities in the nutrient cycles of this estuary. Bottom chambers were used to obtain in situ measurements from an Ampelisca abdita (amphipod) community, a Nepthys incisa-Nucula annulata (polychaete-bivalve) community, and a Mercenaria mercenaria (bivalve) community. Oxygen uptake was used as a measure of metabolism. Over a temperature range from 3.2 to 22.4C, ammonia flux at the sediment surface varied. Nitrate was transported in both directions across the sediment-water interface. Phosphate uptake and release varied. The fluxes measured can have significant effects on the nutrient concentrations of the overlying water.