globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-016-0220-x
Scopus记录号: 2-s2.0-84976292959
论文题名:
Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin
作者: Scofield V.; Melack J.M.; Barbosa P.M.; Amaral J.H.F.; Forsberg B.R.; Farjalla V.F.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 129, 期:2018-01-02
起始页码: 77
结束页码: 91
语种: 英语
英文关键词: Amazon basin ; Carbon dioxide ; CO2 outgassing ; Negro River basin ; Tropical aquatic ecosystems
Scopus关键词: aquatic ecosystem ; biogenic emission ; carbon dioxide ; carbon flux ; degassing ; floodplain ; forest ecosystem ; partial pressure ; shrub ; tributary ; tropical environment ; vegetation cover ; Amazon Basin ; Amazonia ; Rio Negro Basin
英文摘要: Outgassing of biogenic gases from river systems is observed widely, and tropical rivers and their extensive floodplains are likely to be large sources. By combining the first regional survey of CO2 outgassing from rivers and floodplains in the Amazonian Negro River basin with areal coverage of habitats, we demonstrate large CO2 fluxes from these dissolved organic carbon-rich waters. We conducted measurements of pCO2 and calculations of CO2 outgassing from the water to the atmosphere in river channels and floodplains, including seasonally flooded forests (igapó) and shrubs (campinas), of the Negro River and 21 of its tributaries, in both high (2011) and low (2012) water phases. CO2 outgassing averaged 96 ± 48 mmol C m−2 day−1 during low water and 253 ± 193 mmol C m−2 day−1 during high water. We observed lower rates of CO2 outgassing in vegetated habitats in comparison to the river channels, due mainly to lower wind speeds. Regional CO2 outgassing was determined based on average CO2 emissions in each habitat and the area covered by each category of aquatic habitat in the basin. Our estimate of total CO2 emission from the basin is 35.1 ± 4.3 Tg C year−1. These results add to the current understanding of the role of Amazonian rivers and floodplains in local, regional and global estimates CO2 emission from inland aquatic ecosystems. © 2016, Springer International Publishing Switzerland.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83385
Appears in Collections:气候减缓与适应
气候变化事实与影响

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作者单位: Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Ilha do Fundão, PO Box 68020, Rio de Janeiro, RJ, Brazil; Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil; Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, United States; Earth Research Institute, University of California, Santa Barbara, CA, United States; Coordination of Environmental Dynamics, National Institute of Amazonian Research (INPA), Manaus, AM, Brazil

Recommended Citation:
Scofield V.,Melack J.M.,Barbosa P.M.,et al. Carbon dioxide outgassing from Amazonian aquatic ecosystems in the Negro River basin[J]. Biogeochemistry,2016-01-01,129(2018-01-02)
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