Denitrification, N2O emissions, and nutrient export in Maryland coastal plain streams

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dc.contributor.advisorFisher, Thomas Ren_US
dc.contributor.authorGardner, John Roberten_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.accessioned2014-10-11T05:55:08Z
dc.date.available2014-10-11T05:55:08Z
dc.date.issued2014en_US
dc.description.abstractSmall streams are hotspots for denitrification, emissions of a potent greenhouse gas nitrous oxide (N<sub>2</sub>O), and are also highly connected to their watersheds via groundwater flowpaths. In-stream, reach scale denitrification and N<sub>2</sub>O production as well as biogenic nitrogen gases delivered by groundwater were investigated in one small agriculturally impacted watershed. Groundwater was an important source of biogenic N<sub>2</sub>, but most N<sub>2</sub>O was produced in-stream and emissions were relatively high. In addition, agricultural streams significantly contribute to nutrient loading and degradation of downstream aquatic ecosystems. Export and transport mechanisms of nitrogen and phosphorus were investigated during base and stormflow in three watersheds with varying amounts of agricultural and forested land use. Quickflow, which is associated with storms, transported most of the phosphorus and ammonium in the agricultural watersheds, but quickflow had little impact on nutrient concentrations and export in the forested watershed.en_US
dc.identifierhttps://doi.org/10.13016/M2TC7J
dc.identifier.urihttp://hdl.handle.net/1903/15804
dc.language.isoenen_US
dc.subject.pqcontrolledEnvironmental scienceen_US
dc.subject.pqcontrolledBiogeochemistryen_US
dc.subject.pquncontrolleddenitrificationen_US
dc.subject.pquncontrolledgas exchangeen_US
dc.subject.pquncontrolledheadwater streamsen_US
dc.subject.pquncontrollednitrogenen_US
dc.subject.pquncontrolledstormflowen_US
dc.subject.pquncontrolledwatersheden_US
dc.titleDenitrification, N2O emissions, and nutrient export in Maryland coastal plain streamsen_US
dc.typeThesisen_US

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