دورية أكاديمية
أعرض في EDS

Large emissions from floodplain trees close the Amazon methane budget.

التفاصيل البيبلوغرافية
العنوان: Large emissions from floodplain trees close the Amazon methane budget.
المؤلفون: Pangala SR; School of Environment, Earth and Ecosystem Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK., Enrich-Prast A; Department of Thematic Studies, Environmental Change, Linköping University, Linköping SE-581 83, Sweden.; Department of Botany, Institute of Biology, University Federal of Rio de Janeiro, Rio de Janeiro, Brazil., Basso LS; Instituto de Pesquisas Energéticas e Nucleares (IPEN), Comissao Nacional de Energia Nuclear (CNEN), Atmospheric Chemistry Laboratory, 2242 Avenida Professor Lineu Prestes, Cidade Universitaria, Sao Paulo CEP 05508-000, Brazil., Peixoto RB; Department of Botany, Institute of Biology, University Federal of Rio de Janeiro, Rio de Janeiro, Brazil., Bastviken D; Department of Thematic Studies, Environmental Change, Linköping University, Linköping SE-581 83, Sweden., Hornibrook ERC; School of Earth Sciences, The University of Bristol, Wills Memorial Building, Queen's Road, Bristol BS8 1RJ, UK.; Department of Earth, Environmental and Geographic Sciences, Irving K. Barber School of Arts and Sciences, The University of British Columbia, Okanagan Campus, 1177 Research Road, Kelowna, British Columbia V1V 1V7, Canada., Gatti LV; Instituto de Pesquisas Energéticas e Nucleares (IPEN), Comissao Nacional de Energia Nuclear (CNEN), Atmospheric Chemistry Laboratory, 2242 Avenida Professor Lineu Prestes, Cidade Universitaria, Sao Paulo CEP 05508-000, Brazil.; National Institute for Space Research (INPE), Center for Earth System Science (CCST), Greenhouse Gas Laboratory (LaGEE), Av. Dos Astronautas 1758, Sao Jose dos Campos CEP 12227-010, Brazil., Marotta H; Ecosystems and Global Change Laboratory (LEMG-UFF)/International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Universidade Federal Fluminense (UFF), Avenido Edmundo March 24210-310, Niteroi/Rio de Janeiro, Brazil.; Sedimentary and Environmental Processes Laboratory (LAPSA-UFF), Department of Geography, Universidade Federal Fluminense (UFF), Avenida General Milton Tavares de Souza 24210-346, Niteroi/Rio de Janeiro, Brazil., Calazans LSB; Department of Botany, Institute of Biology, University Federal of Rio de Janeiro, Rio de Janeiro, Brazil., Sakuragui CM; Department of Botany, Institute of Biology, University Federal of Rio de Janeiro, Rio de Janeiro, Brazil., Bastos WR; Environmental Biogeochemistry Laboratory, Federal University of Rondônia, Rondônia, Brazil., Malm O; Radioisotopes Laboratory, Biophysics Institute, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil., Gloor E; School of Geography, University of Leeds, Woodhouse Lane, Leeds LS9 2JT, UK., Miller JB; Global Monitoring Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Colorado 80305, USA., Gauci V; School of Environment, Earth and Ecosystem Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK.
المصدر: Nature [Nature] 2017 Dec 14; Vol. 552 (7684), pp. 230-234. Date of Electronic Publication: 2017 Dec 04.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: MEDLINE
أسماء مطبوعة: Publication: Basingstoke : Nature Publishing Group
Original Publication: London, Macmillan Journals ltd.
مواضيع طبية MeSH: Rainforest* , Wetlands*, Methane/*analysis , Methane/*metabolism , Trees/*chemistry , Trees/*metabolism, Atmosphere/chemistry ; Brazil ; Rivers ; Wood/chemistry
مستخلص: Wetlands are the largest global source of atmospheric methane (CH 4 ), a potent greenhouse gas. However, methane emission inventories from the Amazon floodplain, the largest natural geographic source of CH 4 in the tropics, consistently underestimate the atmospheric burden of CH 4 determined via remote sensing and inversion modelling, pointing to a major gap in our understanding of the contribution of these ecosystems to CH 4 emissions. Here we report CH 4 fluxes from the stems of 2,357 individual Amazonian floodplain trees from 13 locations across the central Amazon basin. We find that escape of soil gas through wetland trees is the dominant source of regional CH 4 emissions. Methane fluxes from Amazon tree stems were up to 200 times larger than emissions reported for temperate wet forests and tropical peat swamp forests, representing the largest non-ebullitive wetland fluxes observed. Emissions from trees had an average stable carbon isotope value (δ 13 C) of -66.2 ± 6.4 per mil, consistent with a soil biogenic origin. We estimate that floodplain trees emit 15.1 ± 1.8 to 21.2 ± 2.5 teragrams of CH 4 a year, in addition to the 20.5 ± 5.3 teragrams a year emitted regionally from other sources. Furthermore, we provide a 'top-down' regional estimate of CH 4 emissions of 42.7 ± 5.6 teragrams of CH 4 a year for the Amazon basin, based on regular vertical lower-troposphere CH 4 profiles covering the period 2010-2013. We find close agreement between our 'top-down' and combined 'bottom-up' estimates, indicating that large CH 4 emissions from trees adapted to permanent or seasonal inundation can account for the emission source that is required to close the Amazon CH 4 budget. Our findings demonstrate the importance of tree stem surfaces in mediating approximately half of all wetland CH 4 emissions in the Amazon floodplain, a region that represents up to one-third of the global wetland CH 4 source when trees are combined with other emission sources.
التعليقات: Erratum in: Nature. 2017 Dec 13;:. (PMID: 29236687)
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المشرفين على المادة: OP0UW79H66 (Methane)
تواريخ الأحداث: Date Created: 20171207 Date Completed: 20180509 Latest Revision: 20181113
رمز التحديث: 20240829
DOI: 10.1038/nature24639
PMID: 29211724
قاعدة البيانات: MEDLINE
الوصف
تدمد:1476-4687
DOI:10.1038/nature24639