Sediment Biogeochemistry Across the Patuxent River Estuarine Gradient: Geochronology and Fe-S-P Interactions

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dc.contributor.advisorCornwell, Jeffrey Cen_US
dc.contributor.authorOKeefe, Jenniferen_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2008-04-22T16:08:26Z
dc.date.available2008-04-22T16:08:26Z
dc.date.issued2007-12-21en_US
dc.description.abstractAlthough salinity and redox gradients are defining features of estuarine biogeochemistry, compositional changes in sediment characteristics associated with these factors are poorly described in U.S. coastal plain estuaries. Understanding the basics of nutrient sources and sinks, in the context of these defining characteristics, is required to make efficient and effective management decisions regarding estuarine eutrophication. In this study, detailed analysis of long-term nutrient burial has been used as a tool to understand the trajectory of nutrient cycling at 7 stations along an oligohaline to mesohaline transect in the Patuxent River estuary. Sediment mass accumulation rates were determined for 3 of the 7 sites. Cores analyzed for total P, total N, organic C, biogenic silica, δ13C, and δ15N did not provide evidence of historical nutrient reduction actions taken in this watershed. Burial rates of Fe-S mineral phases and inorganic P (IP) indicated pyrite formation limited the availability of Fe-oxides for adsorption and retention of IP.en_US
dc.format.extent549424 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/7794
dc.language.isoen_US
dc.subject.pqcontrolledEnvironmental Sciencesen_US
dc.subject.pqcontrolledGeochemistryen_US
dc.subject.pquncontrolledsedimenten_US
dc.subject.pquncontrolledgeochronologyen_US
dc.subject.pquncontrolledpyriteen_US
dc.subject.pquncontrolledphosphorusen_US
dc.subject.pquncontrolledestuaryen_US
dc.subject.pquncontrolledPatuxent Riveren_US
dc.titleSediment Biogeochemistry Across the Patuxent River Estuarine Gradient: Geochronology and Fe-S-P Interactionsen_US
dc.typeThesisen_US

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