Počet záznamů: 1

Major changes in forest carbon and nitrogen cycling caused by declining sulphur deposition

  1. 1.
    0369362 - UEK-B 2012 RIV GB eng J - Článek v odborném periodiku
    Oulehle, F. - Evans, C. D. - Hofmeister, J. - Krejci, R. - Tahovská, K. - Persson, T. - Cudlín, Pavel - Hruška, J.
    Major changes in forest carbon and nitrogen cycling caused by declining sulphur deposition.
    Global Change Biology. Roč. 17, č. 10 (2011), 3115–3129 ISSN 1354-1013
    Grant CEP: GA MŠk OC10022
    Výzkumný záměr: CEZ:AV0Z60870520
    Klíčová slova: acidification * carbon * deposition * DOC * forest floor * leaching * nitrogen * nitrogen saturation * soil * sulphur
    Kód oboru RIV: DD - Geochemie
    Impakt faktor: 6.862, rok: 2011
    http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2486.2011.02468.x/pdf http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2486.2011.02468.x/pdf

    Sulphur (S) and nitrogen (N) deposition are important drivers of the terrestrial carbon (C) and N cycling. We analyzed changes in C and N pools in soil and tree biomass at a highly acidified spruce site in the Czech Republic during a 15 year period. Total S deposition decreased from 5 to 1.1 g m−2 yr−1 between 1995 and 2009, whereas bulk N deposition did not change. Forest floor net N mineralization also decreased. This had consequences for spruce needle N concentration. Higher forest growth and lower canopy defoliation was observed in the 2000s compared to the 1990s. Our results demonstrate that reducing S deposition has had a profound impact on forest organic matter cycling, leading to a reversal of historic ecosystem N enrichment, cessation of nitrate leaching, and a major loss of accumulated organic soil C and N stocks. These results have major implications for our understanding of the controls on both N saturation and C sequestration in forests, and other ecosystems, subjected to current or historic S deposition.
    Trvalý link: http://hdl.handle.net/11104/0203445