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dc.contributor.authorMcCalmont, Jon
dc.contributor.authorKho, Lip Khoon
dc.contributor.authorTeh, Yit Arn
dc.contributor.authorLewis, Kennedy
dc.contributor.authorChocholek, Melanie
dc.contributor.authorRumpang, Elisa
dc.contributor.authorHill, Timothy
dc.identifier.citationMcCalmont , J , Kho , L K , Teh , Y A , Lewis , K , Chocholek , M , Rumpang , E & Hill , T 2021 , ' Short- and long-term carbon emissions from oil palm plantations converted from logged tropical peat swamp forest ' , Global Change Biology , vol. Early View .
dc.identifier.otherPURE: 272662176
dc.identifier.otherPURE UUID: 2d1eb71e-f701-414d-b109-ce594e3f8feb
dc.identifier.otherRIS: urn:84B0EFDE12EA62EB052B279F924FB462
dc.identifier.otherWOS: 000620897700001
dc.identifier.otherScopus: 85101544328
dc.descriptionFunding: The research was carried out as part of a project funded by the Malaysian Palm Oil Board (MPOB). L. K. K and E. R. are both employees of MPOB. The research was carried out with the support of Sarawak Oil Palm Berhard (SOPB) on whose land the research project was based.en
dc.description.abstractNeed for regional economic development and global demand for agro‐industrial commodities has resulted in large‐scale conversion of forested landscapes to industrial agriculture across South East Asia. However, net emissions of CO2 from tropical peatland conversions may be significant and remain poorly quantified, resulting in controversy around the magnitude of carbon release following conversion. Here we present long term, whole ecosystem monitoring of carbon exchange from two oil palm plantations on converted tropical peat swamp forest. Our sites compare a newly converted oil palm plantation (OPnew) to a mature oil palm plantation (OPmature) and combine them in the context of existing emission factors. Mean annual net emission (NEE) of CO2 measured at OPnew during the conversion period (137.8 Mg CO2 ha‐1 yr ‐1) were an order of magnitude lower during the measurement period at OPmature (17.5 Mg CO2 ha‐1 yr‐1). However, mean water table depth (WTD) was shallower (0.26 m) than a typical drainage target of 0.6 m suggesting our emissions may be a conservative estimate for mature plantations, mean WTD at OPnew was more typical at 0.54 m. Reductions in net emissions were primarily driven by increasing biomass accumulation into highly productive palms. Further analysis suggested annual peat carbon losses of 24.9 Mg CO2‐C ha‐1 yr‐1 over the first 6 years, lower than previous estimates for this early period from subsidence studies, losses reduced to 12.8 Mg CO2‐C ha‐1 yr‐1 in the later, mature phase. Despite reductions in NEE and carbon loss over time, the system remained a large net source of carbon to the atmosphere after 12 years with the remaining 8 years of a typical plantation’s rotation unlikely to recoup losses. These results emphasise the need for effective protection of tropical peatlands globally and strengthening of legislative enforcement where moratoria on peatland conversion already exist.
dc.relation.ispartofGlobal Change Biologyen
dc.rightsCopyright © 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.subjectCarbon emissionen
dc.subjectCarbon stocksen
dc.subjectEcosystem carbon exchangeen
dc.subjectEddy covarianceen
dc.subjectLand-use changeen
dc.subjectOil palm plantationen
dc.subjectPeatland drainageen
dc.subjectTropical peatland conversionen
dc.subjectGE Environmental Sciencesen
dc.subjectSB Plant cultureen
dc.subjectSDG 6 - Clean Water and Sanitationen
dc.subjectSDG 8 - Decent Work and Economic Growthen
dc.subjectSDG 15 - Life on Landen
dc.titleShort- and long-term carbon emissions from oil palm plantations converted from logged tropical peat swamp foresten
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Geography and Geosciencesen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Earth and Environmental Sciencesen
dc.description.statusPeer revieweden

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