globalchange  > 气候变化事实与影响
DOI: 10.1002/2015GB005271
Scopus记录号: 2-s2.0-84979496880
论文题名:
Carbon fate in a large temperate human-impacted river system: Focus on benthic dynamics
作者: Vilmin L; , Flipo N; , Escoffier N; , Rocher V; , Groleau A
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期:7
起始页码: 1086
结束页码: 1104
语种: 英语
英文关键词: benthic and pelagic dynamics ; carbon ; human-impacted system ; hydrobiogeochemical modeling ; river export and metabolism ; sediment-water exchanges
Scopus关键词: accumulation ; anthropogenic effect ; benthic flux ; biogeochemical cycle ; biogeochemistry ; carbon budget ; carbon emission ; environmental fate ; metabolism ; organic carbon ; pelagic environment ; river system ; sediment-water interface ; sedimentation ; France ; Ile de France ; Paris ; Seine River [France] ; Ville de Paris
英文摘要: Fluvial networks play an important role in regional and global carbon (C) budgets. The Seine River, from the Paris urban area to the entrance of its estuary (220 km), is studied here as an example of a large human-impacted river system subject to temperate climatic conditions. We assess organic C (OC) budgets upstream and downstream from one of the world's largest wastewater treatment plants and for different hydrological conditions using a hydrobiogeochemical model. The fine representation of sediment accumulation on the river bed allows for the quantification of pelagic and benthic effects on OC export toward the estuary and on river metabolism (i.e., net CO2 production). OC export is significantly affected by benthic dynamics during the driest periods, when 25% of the inputs to the system is transformed or stored in the sediment layer. Benthic processes also substantially affect river metabolism under any hydrological condition. On average, benthic respiration accounts for one third of the total river respiration along the studied stretch (0.27 out of 0.86 g C m−2 d−1). Even though the importance of benthic processes was already acknowledged by the scientific community for headwater streams, these results stress the major influence of benthic dynamics, and thus of physical processes such as sedimentation and resuspension, on C cycling in downstream river systems. It opens the door to new developments in the quantification of C emissions by global models, whereby biogeochemical processing and benthic dynamics should be taken into account. ©2016. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77835
Appears in Collections:气候变化事实与影响

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作者单位: Geosciences Department, MINES ParisTech, PSL Research University, Fontainebleau, France; Now at Department of Earth Sciences-Geochemistry, Faculty of Geosciences, Utrecht University, Utrecht, Netherlands; IPGP, Sorbonne Paris Cité, Univ Paris Diderot, Paris, France; Now at EPFL, Stream Biofilm and Ecosystem Research Laboratory, Lausanne, Switzerland; SIAAP, Direction du Développement et de la Prospective, Colombes, France

Recommended Citation:
Vilmin L,, Flipo N,, Escoffier N,et al. Carbon fate in a large temperate human-impacted river system: Focus on benthic dynamics[J]. Global Biogeochemical Cycles,2016-01-01,30(7)
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