• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Marine Biological Laboratory
    • Ecosystems Center
    • View Item
    •   WHOAS Home
    • Marine Biological Laboratory
    • Ecosystems Center
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Nitrous oxide nitrification and denitrification 15N enrichment factors from Amazon forest soils

    Thumbnail
    View/Open
    1051-0761(2006)016[2153_nonadn]2.0.co;2.pdf (429.1Kb)
    Date
    2006-12
    Author
    Perez, Tibisay  Concept link
    Garcia-Montiel, Diana  Concept link
    Trumbore, Susan E.  Concept link
    Tyler, Stanley  Concept link
    de Camargo, Plinio  Concept link
    Moreira, Marcelo  Concept link
    Piccolo, Marisa C.  Concept link
    Cerri, Carlos C.  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/4700
    As published
    https://doi.org/10.1890/1051-0761(2006)016[2153:NONADN]2.0.CO;2
    DOI
    10.1890/1051-0761(2006)016[2153:NONADN]2.0.CO;2
    Keyword
     Amazon forest soils; Denitrification; Isotopic enrichment factors; Isotopomers; Nitrification; Nitrous oxide; Site preference 
    Abstract
    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 in constraining the global N2O budget. Determining the reasons for spatial and temporal variations in isotope signatures requires that we know the isotope enrichment factors for nitrification and denitrification, the two processes that produce N2O in soils. We have devised a method for measuring these enrichment factors using soil incubation experiments and report results from this method for three rain forest soils collected in the Brazilian Amazon: soil with differing sand and clay content from the Tapajos National Forest (TNF) near Santarém, Pará, and Nova Vida Farm, Rondônia. The 15N enrichment factors for nitrification and denitrification differ with soil texture and site: −111‰ ± 12‰ and −31‰ ± 11‰ for a clay-rich Oxisol (TNF), −102‰ ± 5‰ and −45‰ ± 5‰ for a sandier Ultisol (TNF), and −10.4‰ ± 3.5‰ (enrichment factor for denitrification) for another Ultisol (Nova Vida) soil, respectively. We also show that the isotopomer site preference (δ15Nα − δ15Nβ, where α indicates the central nitrogen atom and β the terminal nitrogen atom in N2O) may allow differentiation between processes of production and consumption of N2O and can potentially be used to determine the contributions of nitrification and denitrification. The site preferences for nitrification and denitrification from the TNF-Ultisol incubated soils are: 4.2‰ ± 8.4‰ and 31.6‰ ± 8.1‰, respectively. Thus, nitrifying and denitrifying bacteria populations under the conditions of our study exhibit significantly different 15N site preference fingerprints. Our data set strongly suggests that N2O isotopomers can be used in concert with traditional N2O stable isotope measurements as constraints to differentiate microbial N2O processes in soil and will contribute to interpretations of the isotopic site preference N2O values found in the free troposphere.
    Description
    Author Posting. © Ecological Society of America, 2006. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecological Applications 16 (2006): 2153–2167, doi:10.1890/1051-0761(2006)016[2153:NONADN]2.0.CO;2.
    Collections
    • Ecosystems Center
    Suggested Citation
    Ecological Applications 16 (2006): 2153–2167
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      The biogeochemistry of marine nitrous oxide 

      Frame, Caitlin H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-06)
      Atmospheric nitrous oxide N2O concentrations have been rising steadily for the past century as a result of human activities. In particular, human perturbation of the nitrogen cycle has increased the N2O production rates ...
    • Thumbnail

      Coupled nitrification–denitrification measured in situ in a Spartina alterniflora marsh with a 15NH4+ tracer 

      Hamersley, Michael R.; Howes, Brian L. (Inter-Research, 2005-09-01)
      Measurements of N losses by denitrification from saltmarsh sediments have proved difficult because of the importance of plant metabolism and tidal cycles to sediment N cycling. In vitro approaches often do not measure the ...
    • Thumbnail

      Modeling nitrous oxide emissions from large-scale intensive cropping systems in the southern Amazon 

      Costa, Ciniro; Galford, Gillian L.; Coe, Michael T.; Macedo, Marcia N.; Jankowski, KathiJo; O’Connell, Christine; Neill, Christopher (Frontiers Media, 2021-12-10)
      Nitrogen (N) fertilizer use is rapidly intensifying on tropical croplands and has the potential to increase emissions of the greenhouse gas, nitrous oxide (N2O). Since about 2005 Mato Grosso (MT), Brazil has shifted from ...
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo