Record details

    Atmospheric sulfur deposition alters pathways of gaseous carbon production in peatlands
    Bridgham, S.D.
    Novák, Martin
    Vile, M. A.
    Wieder, R.K.
Publication type
    článek v periodiku
Source title - serial
    Global Biogeochemical Cycles
    Roč. 17, č. 2
Thesaurus term
    sulfate reduction,methanogenesis,Sphagnum,peatlands,carbon,methan production,organic matter,mineralization,emission,acid deposition,climatic warming,greenhouse gases,carbon-dioxide
Abstract (in english)
   Peatlands represent large carbon (C) reservoirs that can act as a source or sink for greenhouse gases. Methanogenesis is thought to be one of the most important anaerobic C mineralization pathways in peatlands, especially in regions where input of sulfate from acid deposition is low. Here we report greater anaerobic C flow through sulfate reduction than through methanogenesis at all sites situated along a global atmospheric sulfur deposition gradient. Stoichiometric mass balance suggests that fermentation is a dominant anaerobic C mineralization pathway in unpolluted peatlands, while methanogenesis contributed minimally to total anaerobic carbon mineralization in these sites. Global increases of atmospheric sulfur deposition minimize the impacts of climatic warming by simultaneously decreasing rates of methanogenesis while causing little change in rates of total anaerobic C mineralization in Sphagnum-dominated peatlands.
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
Import date
    15. 10. 2014