Macrophytes as indicators of land-derived wastewater : application of a δ15N method in aquatic systems Cole, Marci L. Kroeger, Kevin D. McClelland, James W. Valiela, Ivan 2010-05-18T18:38:40Z 2010-05-18T18:38:40Z 2005-01-25
dc.description Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Water Resources Research 41 (2005): W01014, doi:10.1029/2004WR003269. en_US
dc.description.abstract We measured δ15N signatures of macrophytes and particulate organic matter (POM) in six estuaries and three freshwater ponds of Massachusetts to assess whether the signatures could be used as indicators of the magnitude of land-derived nitrogen loads, concentration of dissolved inorganic nitrogen in the water column, and percentage of N loads contributed by wastewater disposal. The study focused specifically on sites on Cape Cod and Nantucket Island, in the northeastern United States. There was no evidence of seasonal changes in δ15N values of macrophytes or POM. The δ15N values of macrophytes and POM increased as water column dissolved inorganic nitrogen concentrations increased. We found that δ15N of macrophytes, but not of POM, increased as N load increased. The δ15N values of macrophytes and groundwater NO3 tracked the percent of wastewater contribution linearly. This research confirms that δ15N values of macrophytes and NO3 can be excellent indicators of anthropogenic N in aquatic systems. en_US
dc.description.sponsorship This 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 a Massachusetts Department of Environmental Protection grant to Applied Science Associates, Narragansett, Rhode Island, and from a National Oceanic and Atmospheric Administration National Estuarine Research Reserve fellowship and Palmer/McCleod fellowship to K.D.K. en_US
dc.format.mimetype application/pdf
dc.identifier.citation Water Resources Research 41 (2005): W01014 en_US
dc.identifier.doi 10.1029/2004WR003269
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.subject δ15N en_US
dc.subject Macrophyte en_US
dc.subject Stable isotope en_US
dc.subject Wastewater en_US
dc.title Macrophytes as indicators of land-derived wastewater : application of a δ15N method in aquatic systems en_US
dc.type Article en_US
dspace.entity.type Publication
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