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dc.contributor.authorCole, Marci L.  Concept link
dc.contributor.authorKroeger, Kevin D.  Concept link
dc.contributor.authorMcClelland, James W.  Concept link
dc.contributor.authorValiela, Ivan  Concept link
dc.date.accessioned2006-03-17T16:19:38Z
dc.date.available2006-03-17T16:19:38Z
dc.date.issued2005-07-18
dc.identifier.urihttps://hdl.handle.net/1912/679
dc.descriptionAuthor Posting. © The Authors, 2005. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Biogeochemistry 77 (2006): 199-215, doi:10.1007/s10533-005-1036-2.en
dc.description.abstractEutrophication is a major agent of change affecting freshwater, estuarine, and marine systems. It is largely driven by transportation of nitrogen from natural and anthropogenic sources. Research is needed to quantify this nitrogen delivery and to link the delivery to specific land-derived sources. In this study we measured nitrogen concentrations and δ15N values in seepage water entering three freshwater ponds and six estuaries on Cape Cod, Massachusetts and assessed how they varied with different types of land use. Nitrate concentrations and δ15N values in groundwater reflected land use in developed and pristine watersheds. In particular, watersheds with larger populations delivered larger nitrate loads with higher δ15N values to receiving waters. The enriched δ15N values confirmed nitrogen loading model results identifying wastewater contributions from septic tanks as the major N source. Furthermore, it was apparent that N coastal sources had a relatively larger impact on the N loads and isotopic signatures than did inland N sources further upstream in the watersheds. This finding suggests that management priorities could focus on coastal sources as a first course of action. This would require management constraints on a much smaller population.en
dc.description.sponsorshipThis work was supported by funds from the Woods Hole Oceanographic Institution Sea Grant Program, from the Cooperative Institute for Coastal and Estuarine Environmental Technology, from Massachusetts Department of Environmental Protection to Applied Science Associates, Narragansett, RI, as well as from Palmer/McLeod and NOAA National Estuarine Research Reserve Fellowships to Kevin Kroeger. This work is the result of research sponsored by NOAA National Sea Grant College Program Office, Department of Commerce, under Grant No. NA86RG0075, Woods Hole Oceanographic Institution Sea Grant Project No. R/M-40.en
dc.format.extent198655 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.relation.urihttps://doi.org/10.1007/s10533-005-1036-2
dc.subjectCape Coden
dc.subjectNitrogenen
dc.subjectGroundwateren
dc.subjectStable isotopesen
dc.subjectLand useen
dc.titleEffects of watershed land use on nitrogen concentrations and δ15 Nitrogen in groundwateren
dc.typePreprinten


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