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Title: Greenhouse gas dynamics in degraded and restored tropical peatlands
Authors: Jauhiainen, J.
Page, S. E.
Vasander, H.
First Published: 2016
Publisher: International Mire Conservation Group, International Peat Society
Citation: Mires and Peat, 2016, 17(06), 1- 12.
Abstract: Agricultural and other land uses on ombrotrophic lowland tropical peat swamps typically lead to reduced vegetation biomass and water table drawdown. We review what is known about greenhouse gas (GHG) dynamics in natural and degraded tropical peat systems in south-east Asia, and on this basis consider what can be expected in terms of GHG dynamics under restored conditions. Only limited in situ data are available on the effects of restoration and the consequences for peat carbon (C) dynamics. Hydrological restoration seeks to bring the water table closer to the peat surface and thus re-create near-natural water table conditions, in order to reduce wildfire risk and associated fire impacts on the peat C store, as well as to reduce aerobic peat decomposition rates. However, zero emissions are unlikely to be achieved due to the notable potential for carbon dioxide (CO2) production from anaerobic peat decomposition processes. Increased vegetation cover (ideally woody plants) resulting from restoration will increase shading and reduce peat surface temperatures, and this may in turn reduce aerobic decomposition rates. An increase in litter deposition rate will compensate for C losses by peat decomposition but also increase the supply of labile C, which may prime decomposition, especially in peat enriched with recalcitrant substrates. The response of tropical peatland GHG emissions to peatland restoration will also vary according to previous land use and land use intensity.
DOI Link: 10.19189/MaP.2016.OMB.229
ISSN: 1819-754X
Embargo on file until: 1-Jan-10000
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Embargoed: Copyright is automatically assigned to IMCG and IPS on submission. Articles may be freely downloaded from the Journal's web site and printed by individuals for personal use. They may not be altered in any way, and they may not be offered for sale.
Appears in Collections:Published Articles, Dept. of Geography

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