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dc.contributor.authorGriffith, David R.  Concept link
dc.contributor.authorRaymond, Peter A.  Concept link
dc.date.accessioned2011-05-26T14:15:48Z
dc.date.available2011-05-26T14:15:48Z
dc.date.issued2010-08-02
dc.identifier.urihttps://hdl.handle.net/1912/4622
dc.descriptionAuthor Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Marine Chemistry 124 (2011): 14-22, doi:10.1016/j.marchem.2010.11.003.en_US
dc.description.abstractThe lower Hudson River is a highly urbanized estuary that receives large inputs of treated wastewater. To determine how organic matter from wastewater influences carbon cycling in this type of system, we measured chlorophyll a, pCO2, dissolved organic carbon (DOC), δ13C-DOC, and Δ14C-DOC along the salinity gradient and at wastewater treatment plants. Isotopic mixing curves indicate a net removal of DOC that is 13C enriched and 14C depleted. The amount of DOC removed was consistent with CO2 evasion from the estuary. During two transects at average to low flow, the lower Hudson River Estuary was a heterotrophic system with CO2 evasion balanced by the utilization of aged DOC derived from wastewater and marine phytoplankton that enter the estuary at the seaward end-member. DOC removals were largest during a period of high river flow, when isotopic mixing curves also suggest large contributions from labile terrestrial OC sources. Overall, our results suggest that net heterotrophy in the lower Hudson River Estuary is fueled by aged labile DOC derived from a combination of sources, which are influenced by seasonal phytoplankton blooms, hydrological conditions, and the nature of wastewater inputs.en_US
dc.description.sponsorshipThis research was funded by the Hudson River Foundation’s Tibor T. Polgar Fellowship, the Carpenter-Sperry Fund at Yale University, and the NSF-Arizona AMS Facility’s Student Internship program.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1016/j.marchem.2010.11.003
dc.subjectDissolved organic carbonen_US
dc.subjectWastewateren_US
dc.subjectSewageen_US
dc.subjectHeterotrophyen_US
dc.subjectC-13en_US
dc.subjectC-14en_US
dc.subjectIsotope mixing curvesen_US
dc.subjectCarbon dioxideen_US
dc.subjectChlorophyllen_US
dc.subjectCarbon cycleen_US
dc.subjectUSAen_US
dc.subjectHudson River Estuaryen_US
dc.titleMultiple-source heterotrophy fueled by aged organic carbon in an urbanized estuaryen_US
dc.typePreprinten_US


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