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Unexpectedly large impact of forest management and grazing on global vegetation biomass
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Number of Authors: 132018 (English)In: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 553, no 7686, p. 73-76Article in journal, Letter (Refereed) Published
Abstract [en]

Carbon stocks in vegetation have a key role in the climate system(1-4). However, the magnitude, patterns and uncertainties of carbon stocks and the effect of land use on the stocks remain poorly quantified. Here we show, using state-of-the-art datasets, that vegetation currently stores around 450 petagrams of carbon. In the hypothetical absence of land use, potential vegetation would store around 916 petagrams of carbon, under current climate conditions. This difference highlights the massive effect of land use on biomass stocks. Deforestation and other land-cover changes are responsible for 53-58% of the difference between current and potential biomass stocks. Land management effects (the biomass stock changes induced by land use within the same land cover) contribute 42-47%, but have been underestimated in the literature. Therefore, avoiding deforestation is necessary but not sufficient for mitigation of climate change. Our results imply that trade-offs exist between conserving carbon stocks on managed land and raising the contribution of biomass to raw material and energy supply for the mitigation of climate change. Efforts to raise biomass stocks are currently verifiable only in temperate forests, where their potential is limited. By contrast, large uncertainties hinder verification in the tropical forest, where the largest potential is located, pointing to challenges for the upcoming stocktaking exercises under the Paris agreement.

Place, publisher, year, edition, pages
2018. Vol. 553, no 7686, p. 73-76
National Category
Earth and Related Environmental Sciences
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URN: urn:nbn:se:su:diva-152558DOI: 10.1038/nature25138ISI: 000419769300032PubMedID: 29258288OAI: oai:DiVA.org:su-152558DiVA, id: diva2:1183767
Available from: 2018-02-19 Created: 2018-02-19 Last updated: 2018-02-19Bibliographically approved

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Kastner, ThomasThurner, MartinLuyssaert, Sebastiaan
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