Now showing items 1-9 of 9

  • Denitrification across landscapes and waterscapes : a synthesis 

    Seitzinger, Sybil P.; Harrison, John A.; Bohlke, John K.; Bouwman, A. F.; Lowrance, R.; Peterson, Bruce J.; Tobias, Craig R.; Van Drecht, G. (Ecological Society of America, 2006-12)
    Denitrification is a critical process regulating the removal of bioavailable nitrogen (N) from natural and human-altered systems. While it has been extensively studied in terrestrial, freshwater, and marine systems, there ...
  • Denitrification and total nitrate uptake in streams of a tropical landscape 

    Potter, Jody D.; McDowell, William H.; Merriam, J. L.; Peterson, Bruce J.; Thomas, Suzanne M. (Ecological Society of America, 2010-12)
    Rapid increases in nitrogen (N) loading are occurring in many tropical watersheds, but the fate of N in tropical streams is not well documented. Rates of nitrate uptake and denitrification were measured in nine tropical ...
  • Methods for measuring denitrification : diverse approaches to a difficult problem 

    Groffman, Peter M.; Altabet, Mark A.; Bohlke, John K.; Butterbach-Bahl, Klaus; David, Mark B.; Firestone, Mary K.; Giblin, Anne E.; Kana, Todd M.; Nielsen, Lars Peter; Voytek, Mary A. (2005-07-15)
    Denitrification, the reduction of the nitrogen (N) oxides, nitrate (NO3-) and nitrite (NO2-), to the gases nitric oxide (NO), nitrous oxide (N2O) and dinitrogen (N2), is important to primary production, water quality and ...
  • Modeling denitrification in aquatic sediments 

    Fennel, Katja; Brady, Damian; DiToro, Dominic; Fulweiler, Robinson W.; Gardner, Wayne S.; Giblin, Anne E.; McCarthy, Mark J.; Rao, Alexandra; Seitzinger, Sybil P.; Thouvenot-Korppoo, Marie; Tobias, Craig R. (2008-10-10)
    Sediment denitrification is a major pathway of fixed nitrogen loss from aquatic systems. Due to technical difficulties in measuring this process and its spatial and temporal variability, estimates of local, regional and ...
  • Nitrous oxide nitrification and denitrification 15N enrichment factors from Amazon forest soils 

    Perez, Tibisay; Garcia-Montiel, Diana; Trumbore, Susan E.; Tyler, Stanley; de Camargo, Plinio; Moreira, Marcelo; Piccolo, Marisa C.; Cerri, Carlos C. (Ecological Society of America, 2006-12)
    The isotopic signatures of 15N and 18O in N2O emitted from tropical soils vary both spatially and temporally, leading to large uncertainty in the overall tropical source signature and thereby limiting the utility of isotopes ...
  • Nutrient gradients in Panamanian estuaries : effects of watershed deforestation, rainfall, upwelling, and within-estuary transformations 

    Valiela, Ivan; Giblin, Anne E.; Barth-Jensen, Coralie; Harris, Carolynn; Stone, Thomas A.; Fox, Sophia E.; Crusius, John (Inter-Research, 2013-05-22)
    To test whether deforestation of tropical forests alters coupling of watersheds, estuaries, and coastal waters, we measured nutrients in 8 watershed-estuarine systems on the Pacific coast of Panama where watershed forest ...
  • Predicting microbial nitrate reduction pathways in coastal sediments 

    Algar, Christopher K.; Vallino, Joseph J. (Inter-Research, 2014-01-23)
    We present an ecosystem model that describes the biogeochemistry of a sediment nitrate reducing microbial community. In the model, the microbial community is represented as a distributed metabolic network. Biogeochemical ...
  • Response of benthic metabolism and nutrient cycling to reductions in wastewater loading to Boston Harbor, USA 

    Tucker, Jane; Giblin, Anne E.; Hopkinson, Charles S.; Kelsey, Samuel W.; Howes, Brian L. (Elsevier, 2014-10-02)
    We describe the long-term response of benthic metabolism in depositional sediments of Boston Harbor, MA, to large reductions in organic matter and nutrient loading. Although Boston Harbor received very high loadings of ...
  • Separation of river network–scale nitrogen removal among the main channel and two transient storage compartments 

    Stewart, Robert J.; Wollheim, Wilfred M.; Gooseff, Michael N.; Briggs, Martin A.; Jacobs, Jennifer M.; Peterson, Bruce J.; Hopkinson, Charles S. (American Geophysical Union, 2011-08-30)
    Transient storage (TS) zones are important areas of dissolved inorganic nitrogen (DIN) processing in rivers. We assessed sensitivities regarding the relative impact that the main channel (MC), surface TS (STS), and hyporheic ...