DOI: 10.1002/2014GB004844
Scopus记录号: 2-s2.0-84920942082
论文题名: Tropical wetlands: A missing link in the global carbon cycle?
作者: Sjögersten S ; , Black C ; R ; , Evers S ; , Hoyos-Santillan J ; , Wright E ; L ; , Turner B ; L
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 12 起始页码: 1371
结束页码: 1386
语种: 英语
英文关键词: carbon dioxide
; decomposition
; methane
; net primary productivity
; tropical
; wetland
Scopus关键词: carbon cycle
; carbon dioxide
; decomposition
; global change
; methane
; net primary production
; spatiotemporal analysis
; tropical region
; Southeast Asia
英文摘要: Tropical wetlands are not included in Earth system models, despite being an important source of methane (CH4) and contributing a large fraction of carbon dioxide (CO2) emissions from land use, land use change, and forestry in the tropics. This review identifies a remarkable lack of data on the carbon balance and gas fluxes from undisturbed tropical wetlands, which limits the ability of global change models to make accurate predictions about future climate. We show that the available data on in situ carbon gas fluxes in undisturbed forested tropical wetlands indicate marked spatial and temporal variability in CO2 and CH4 emissions, with exceptionally large fluxes in Southeast Asia and the Neotropics. By upscaling short-term measurements, we calculate that approximately 90±77 Tg CH4 year-1 and 4540±1480 Tg CO2 year-1 are released from tropical wetlands globally. CH4 fluxes are greater from mineral than organic soils, whereas CO2 fluxes do not differ between soil types. The high CO2 and CH4 emissions are mirrored by high rates of net primary productivity and litter decay. Net ecosystem productivity was estimated to be greater in peat-forming wetlands than on mineral soils, but the available data are insufficient to construct reliable carbon balances or estimate gas fluxes at regional scales. We conclude that there is an urgent need for systematic data on carbon dynamics in tropical wetlands to provide a robust understanding of how they differ from well-studied northern wetlands and allow incorporation of tropical wetlands into global climate change models. Key Points Released from tropical wetlands are 90 Tg CH4 year-1 and 3860 Tg CO2 year-1CH4 emissions were greatest from mineral soilsNEP appears greater in peat-forming wetlands than on mineral soil ©2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77497
Appears in Collections: 气候变化事实与影响
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作者单位: School of Biosciences, University of Nottingham, Nottingham, United Kingdom; School of Biosciences, University of Nottingham, Kuala Lumpur, Malaysia; Smithsonian Tropical Research Institute, Panama City, Panama
Recommended Citation:
Sjögersten S,, Black C,R,et al. Tropical wetlands: A missing link in the global carbon cycle?[J]. Global Biogeochemical Cycles,2014-01-01,28(12)