globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.14140
Scopus记录号: 2-s2.0-85045388497
论文题名:
Vascular plant-mediated controls on atmospheric carbon assimilation and peat carbon decomposition under climate change
作者: Gavazov K.; Albrecht R.; Buttler A.; Dorrepaal E.; Garnett M.H.; Gogo S.; Hagedorn F.; Mills R.T.E.; Robroek B.J.M.; Bragazza L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:9
起始页码: 3911
结束页码: 3921
语种: 英语
英文关键词: climate warming ; decomposition ; ecosystem respiration ; elevation gradient ; net ecosystem CO2 exchange ; peatlands ; rhizosphere priming ; vascular plant biomass
Scopus关键词: Sphagnum ; Tracheophyta
英文摘要: Climate change can alter peatland plant community composition by promoting the growth of vascular plants. How such vegetation change affects peatland carbon dynamics remains, however, unclear. In order to assess the effect of vegetation change on carbon uptake and release, we performed a vascular plant-removal experiment in two Sphagnum-dominated peatlands that represent contrasting stages of natural vegetation succession along a climatic gradient. Periodic measurements of net ecosystem CO2 exchange revealed that vascular plants play a crucial role in assuring the potential for net carbon uptake, particularly with a warmer climate. The presence of vascular plants, however, also increased ecosystem respiration, and by using the seasonal variation of respired CO2 radiocarbon (bomb-14C) signature we demonstrate an enhanced heterotrophic decomposition of peat carbon due to rhizosphere priming. The observed rhizosphere priming of peat carbon decomposition was matched by more advanced humification of dissolved organic matter, which remained apparent beyond the plant growing season. Our results underline the relevance of rhizosphere priming in peatlands, especially when assessing the future carbon sink function of peatlands undergoing a shift in vegetation community composition in association with climate change. © 2018 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110264
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Swiss Federal Institute for Forest, Snow and Landscape Research, WSL Site Lausanne, Lausanne, Switzerland; Laboratory of Ecological Systems ECOS, School of Architecture, Civil and Environmental Engineering ENAC, Ecole Polytechnique Fédérale de Lausanne EPFL, Lausanne, Switzerland; Department of Ecology and Environmental Science, Climate Impacts Research Centre, Umeå University, Abisko, Sweden; Laboratoire de Chrono‑Environnement, UMR CNRS 6249, UFR des Sciences et Techniques, Université de Franche-Comté, Besançon, France; NERC Radiocarbon Facility (East Kilbride), East Kilbride, United Kingdom; ISTO, UMR 7327, Université d'Orléans, Orléans, France; ISTO, UMR 7327, CNRS, Orléans, France; ISTO, UMR 7327, BRGM, Orléans, France; Swiss Federal Institute for Forest, Snow and Landscape Research, WSL Site Birmensdorf, Birmensdorf, Switzerland; Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; Biological Sciences, University of Southampton, Southampton, United Kingdom; Department of Life Science and Biotechnologies, University of Ferrara, Ferrara, Italy

Recommended Citation:
Gavazov K.,Albrecht R.,Buttler A.,et al. Vascular plant-mediated controls on atmospheric carbon assimilation and peat carbon decomposition under climate change[J]. Global Change Biology,2018-01-01,24(9)
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