Whole stream nitrogen uptake and denitrification in a restored stream of the Chesapeake Bay

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dc.contributor.advisorKaushal, Sujay Sen_US
dc.contributor.authorKlocker, Carolyn Annen_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.accessioned2007-09-28T15:02:41Z
dc.date.available2007-09-28T15:02:41Z
dc.date.issued2007-08-10en_US
dc.description.abstractLittle is currently known about the effects of stream restoration practices on in-stream processing and nitrogen removal. This study quantified nitrate retention in a survey of two restored and two unrestored streams in Baltimore, MD using unenriched nitrate additions, denitrification enzyme assays, and a <sup>15</sup>N isotope tracer addition in one of the urban restored streams, Minebank Run. Denitrification potential in sediments was variable across streams, whereas nitrate uptake length was significantly correlated to surface water velocity, which was lowest in restored streams. In situ denitrification rates in Minbank Run were 153 mg NO<sub>3</sub><sup>-</sup>-N m<sup>-2</sup> d<sup>-1</sup>, and approximately 40% of the daily load of nitrate could be removed over a distance of 220.5 m. Stream restoration projects that decrease water velocity and increase residence time may lead to considerable rates of nitrate removal through denitrification.en_US
dc.format.extent644682 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/7382
dc.language.isoen_US
dc.subject.pqcontrolledEnvironmental Sciencesen_US
dc.subject.pquncontrolledstream restorationen_US
dc.subject.pquncontrollednitrogen uptakeen_US
dc.subject.pquncontrolleddenitrificationen_US
dc.subject.pquncontrolledurban streamsen_US
dc.subject.pquncontrolleduptake lengthen_US
dc.subject.pquncontrolledisotopeen_US
dc.titleWhole stream nitrogen uptake and denitrification in a restored stream of the Chesapeake Bayen_US
dc.typeThesisen_US

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