Peatlands and the carbon cycle: from local processes to global implications – a synthesis
Peatlands cover only 3% of the Earth's land surface but boreal and subarctic peatlands store about 15–30% of the world's soil carbon (C) as peat. Despite their potential for large positive feedbacks to the climate system through sequestration and emission of greenhouse gases, peatlands are...
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ftdoajarticles:oai:doaj.org/article:d195484ba00740378cf256fa758d55b7 2023-05-15T18:28:32+02:00 Peatlands and the carbon cycle: from local processes to global implications – a synthesis J. Limpens F. Berendse C. Blodau J. G. Canadell C. Freeman J. Holden N. Roulet H. Rydin G. Schaepman-Strub 2008-10-01T00:00:00Z https://doaj.org/article/d195484ba00740378cf256fa758d55b7 EN eng Copernicus Publications http://www.biogeosciences.net/5/1475/2008/bg-5-1475-2008.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/d195484ba00740378cf256fa758d55b7 Biogeosciences, Vol 5, Iss 5, Pp 1475-1491 (2008) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2008 ftdoajarticles 2022-12-31T08:20:34Z Peatlands cover only 3% of the Earth's land surface but boreal and subarctic peatlands store about 15–30% of the world's soil carbon (C) as peat. Despite their potential for large positive feedbacks to the climate system through sequestration and emission of greenhouse gases, peatlands are not explicitly included in global climate models and therefore in predictions of future climate change. In April 2007 a symposium was held in Wageningen, the Netherlands, to advance our understanding of peatland C cycling. This paper synthesizes the main findings of the symposium, focusing on (i) small-scale processes, (ii) C fluxes at the landscape scale, and (iii) peatlands in the context of climate change. The main drivers controlling C fluxes are largely scale dependent and most are related to some aspects of hydrology. Despite high spatial and annual variability in Net Ecosystem Exchange (NEE), the differences in cumulative annual NEE are more a function of broad scale geographic location and physical setting than internal factors, suggesting the existence of strong feedbacks. In contrast, trace gas emissions seem mainly controlled by local factors. Key uncertainties remain concerning the existence of perturbation thresholds, the relative strengths of the CO 2 and CH 4 feedback, the links among peatland surface climate, hydrology, ecosystem structure and function, and trace gas biogeochemistry as well as the similarity of process rates across peatland types and climatic zones. Progress on these research areas can only be realized by stronger co-operation between disciplines that address different spatial and temporal scales. Article in Journal/Newspaper Subarctic Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 J. Limpens F. Berendse C. Blodau J. G. Canadell C. Freeman J. Holden N. Roulet H. Rydin G. Schaepman-Strub Peatlands and the carbon cycle: from local processes to global implications – a synthesis |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Peatlands cover only 3% of the Earth's land surface but boreal and subarctic peatlands store about 15–30% of the world's soil carbon (C) as peat. Despite their potential for large positive feedbacks to the climate system through sequestration and emission of greenhouse gases, peatlands are not explicitly included in global climate models and therefore in predictions of future climate change. In April 2007 a symposium was held in Wageningen, the Netherlands, to advance our understanding of peatland C cycling. This paper synthesizes the main findings of the symposium, focusing on (i) small-scale processes, (ii) C fluxes at the landscape scale, and (iii) peatlands in the context of climate change. The main drivers controlling C fluxes are largely scale dependent and most are related to some aspects of hydrology. Despite high spatial and annual variability in Net Ecosystem Exchange (NEE), the differences in cumulative annual NEE are more a function of broad scale geographic location and physical setting than internal factors, suggesting the existence of strong feedbacks. In contrast, trace gas emissions seem mainly controlled by local factors. Key uncertainties remain concerning the existence of perturbation thresholds, the relative strengths of the CO 2 and CH 4 feedback, the links among peatland surface climate, hydrology, ecosystem structure and function, and trace gas biogeochemistry as well as the similarity of process rates across peatland types and climatic zones. Progress on these research areas can only be realized by stronger co-operation between disciplines that address different spatial and temporal scales. |
format |
Article in Journal/Newspaper |
author |
J. Limpens F. Berendse C. Blodau J. G. Canadell C. Freeman J. Holden N. Roulet H. Rydin G. Schaepman-Strub |
author_facet |
J. Limpens F. Berendse C. Blodau J. G. Canadell C. Freeman J. Holden N. Roulet H. Rydin G. Schaepman-Strub |
author_sort |
J. Limpens |
title |
Peatlands and the carbon cycle: from local processes to global implications – a synthesis |
title_short |
Peatlands and the carbon cycle: from local processes to global implications – a synthesis |
title_full |
Peatlands and the carbon cycle: from local processes to global implications – a synthesis |
title_fullStr |
Peatlands and the carbon cycle: from local processes to global implications – a synthesis |
title_full_unstemmed |
Peatlands and the carbon cycle: from local processes to global implications – a synthesis |
title_sort |
peatlands and the carbon cycle: from local processes to global implications – a synthesis |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doaj.org/article/d195484ba00740378cf256fa758d55b7 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Biogeosciences, Vol 5, Iss 5, Pp 1475-1491 (2008) |
op_relation |
http://www.biogeosciences.net/5/1475/2008/bg-5-1475-2008.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/d195484ba00740378cf256fa758d55b7 |
_version_ |
1766211039272108032 |