Web of Science: 34 cites, Scopus: 34 cites, Google Scholar: cites
Synthesizing greenhouse gas fluxes across nine European peatlands and shrublands - responses to climatic and environmental changes
Carter, M. S. (Danmarks Tekniske Universitet)
Larsen, K. S. (Danmarks Tekniske Universitet)
Emmett, B. (Center for Ecology and Hydrology)
Estiarte, Marc (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Field, C. (Manchester Metropolitan University. School of Science and the Environment)
Leith, I. D. (Centre for Ecology & Hydrology (Edinburgh))
Lund, M. (Aarhus Universitet. Institut for Bioscience. Jordfaunaøkologi og økotoksikologi)
Meijide, A. (European Commission. Joint Research Centre)
Mills, R. T. E. (Center for Ecology and Hydrology)
Niinemets, Ülo (Eesti Maaülikool)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Portillo-Estrada, M. (Eesti Maaülikool)
Schmidt, I. K. (Københavns universitet. Department of Geoscience, Natural Resources and Planning)
Selsted, M. B. (Danmarks Tekniske Universitet)
Sheppard, L. J. (Centre for Ecology & Hydrology (Edinburgh))
Sowerby, A. (Center for Ecology and Hydrology)
Tietema, A. (Universiteit van Amsterdamand)
Beier, C. (Danmarks Tekniske Universitet)

Data: 2012
Resum: In this study, we compare annual fluxes of methane (CH₄), nitrous oxide (N₂O) and soil respiratory carbon dioxide (CO₂) measured at nine European peatlands (n = 4) and shrublands (n = 5). The sites range from northern Sweden to Spain, covering a span in mean annual air temperature from 0 to 16 °C, and in annual precipitation from 300 to 1300 mm yr⁻¹. The effects of climate change, including temperature increase and prolonged drought, were tested at five shrubland sites. At one peatland site, the long-term (> 30 yr) effect of drainage was assessed, while increased nitrogen deposition was investigated at three peatland sites. The shrublands were generally sinks for atmospheric CH₄, whereas the peatlands were CH₄ sources, with fluxes ranging from −519 to +6890 mg CH₄-C m⁻² yr⁻¹ across the studied ecosystems. At the peatland sites, annual CH₄ emission increased with mean annual air temperature, while a negative relationship was found between net CH₄ uptake and the soil carbon stock at the shrubland sites. Annual N₂O fluxes were generally small ranging from −14 to 42 mg N₂O-N m⁻² yr⁻¹. Highest N2O emission occurred at the sites that had highest nitrate (NO3⁻) concentration in the soil water. Furthermore, experimentally increased NO3⁻ deposition led to increased N₂0 efflux, whereas prolonged drought and long-term drainage reduced the N2O efflux. Soil CO₂ emissions in control plots ranged from 310 to 732 g CO₂-C m⁻² yr−1. Drought and long-term drainage generally reduced the soil CO₂ efflux, except at a hydric shrubland where drought tended to increase soil respiration. In terms of fractional importance of each greenhouse gas to the total numerical global warming response, the change in CO₂ efflux dominated the response in all treatments (ranging 71-96%), except for NO3⁻ addition where 89% was due to change in CH₄ emissions. Thus, in European peatlands and shrublands the effect on global warming induced by the investigated anthropogenic disturbances will be dominated by variations in soil CO₂ fluxes.
Ajuts: MICINN/CSD2008-00040
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: article ; recerca ; Versió publicada
Publicat a: Biogeosciences, Vol. 9 (2012) , p. 3739-3755, ISSN 1726-4189

DOI: 10.5194/bg-9-3739-2012

17 p, 1.7 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
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