Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Animo Acid Composition of Suspended Particles, Sediment-Trap Material, and Benthic Sediment in the Potomac Estuary.
Author Sigleo, A. C. ; Shultz, D. J. ;
CORP Author Environmental Research Lab.-Narragansett, Newport, OR. Pacific Ecosystems Branch. ;Geological Survey, Reston, VA.
Publisher 1993
Year Published 1993
Report Number EPA/600/J-94/221 ;ERLN-N207;
Stock Number PB94-169968
Additional Subjects Amino acids ; Organic matter ; Sediments ; Potomac Estuary ; Suspended solids ; Dissolved oxygen ; Euphotic zone ; Benthos ; Deposition(Sediments) ; Seasonal variations ; Nitrogen cycle ; Marine biology ; Biochemistry ; Sediment-water interfaces ; Environmental transport ; Carbon cycle ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB94-169968 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/01/1994
Collation 13p
Sediment trap deployments in estuaries provide a method for estimating the amount of organic material transported to the sediments from the euphotic zone. The amino acid composition of suspended particles, benthic sediment, and sediment-trap material collected at 2.4 m, 5.8 m, and 7.9 m depths in the Potomac Estuary was determined in stratified summer waters, and in well-mixed oxygenated waters (DO) in late fall. Analysis of the flux results suggest that resuspension combined with lateral advection from adjacent slopes can account up to 27% of the material in the deep traps when the estuary was well-mixed and unstratified. When the estuary was stratified in late summer, the amino acid carbon produced by primary productivity in the euphotic zone decreased by 85% (86% for total organic carbon) at the pycnocline at 6 m depth, leaving up to 15% of the vertical organic flux available for benthic sediment deposition.