Stage III N-Saturated Forested Watershed Rapidly Responds to Declining Atmospheric N Deposition

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dc.contributor.advisorEshleman, Keith N.en_US
dc.contributor.authorSabo, Robert Danielen_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.accessioned2014-06-24T06:19:54Z
dc.date.available2014-06-24T06:19:54Z
dc.date.issued2014en_US
dc.description.abstractThis study used a mass balance approach by characterizing the input, output, and sink rates of N in order to assess a declared "stage III N-saturated forest" response to decreased atmospheric N deposition in western Maryland. Relying on the conceptual model of kinetic N-saturation to holistically link stream, vegetative, soil, and atmospheric compartments and the use of a novel stable isotopic technique, the study demonstrated dynamic soil NO3-N pools, unprocessed atmospheric NO3-N in base flow, and significant reductions in NO3-N yield in response to decreased atmospheric N deposition. A lumped conceptual model, incorporating a dormant season NO3-N flush, was proposed that explains forest response to decreased deposition and sheds light on the hydrologic processes that govern the storage/release of NO3-N among years. It is proposed that this flushing mechanism prevents forests from attaining higher stages of N-saturation and predicts forests will be responsive to further reductions in N deposition.en_US
dc.identifier.urihttp://hdl.handle.net/1903/15410
dc.language.isoenen_US
dc.subject.pqcontrolledEnvironmental scienceen_US
dc.subject.pqcontrolledBiogeochemistryen_US
dc.subject.pqcontrolledWater resources managementen_US
dc.subject.pquncontrolledAtmospheric N Depositionen_US
dc.subject.pquncontrolledNitrateen_US
dc.subject.pquncontrolledN-saturationen_US
dc.subject.pquncontrolledStable Isotopesen_US
dc.subject.pquncontrolledTemperate Foresten_US
dc.titleStage III N-Saturated Forested Watershed Rapidly Responds to Declining Atmospheric N Depositionen_US
dc.typeThesisen_US

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