DOI: 10.1007/s10533-016-0263-z
Scopus记录号: 2-s2.0-84992160336
论文题名: Hysteresis effects in organic matter turnover in a tropical floodplain during a flood cycle
作者: Zuijdgeest A. ; Baumgartner S. ; Wehrli B.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 131, 期: 2018-01-02 起始页码: 49
结束页码: 63
语种: 英语
英文关键词: Flood pulse
; Floodplain
; Hysteresis
; Inundation
; Organic matter
; Travel time
Scopus关键词: carbon cycle
; concentration (composition)
; data set
; dissolved organic carbon
; floodplain
; hydrological cycle
; hysteresis
; organic matter
; particulate matter
; seasonal variation
; travel time
; tropical region
; Zambezi River
英文摘要: Tropical inland waters are increasingly recognized for their role in the global carbon cycle, but uncertainty about the effects of such systems on the transported organic matter remains. The seasonal interactions between river, floodplain, and vegetation result in highly dynamic systems, which can exhibit markedly different biogeochemical patterns throughout a flood cycle. In this study, we determined rates and governing processes of organic matter turnover. Multi-probes in the Barotse Plains, a pristine floodplain in the Upper Zambezi River (Zambia), provided a high-resolution data set over the course of a hydrological cycle. The concentrations of oxygen, carbon dioxide, dissolved organic carbon, and suspended particulate matter in the main channel showed clear hysteresis trends with expanding and receding water on the floodplain. Lower oxygen and suspended matter concentrations prevailed at longer travel times of water in the floodplain, while carbon dioxide and dissolved organic carbon concentrations were higher when the water spent more time on the floodplain. Maxima of particulate loads occurred before highest water levels, whereas the maximum in dissolved organic carbon load occurred during the transition of flooding and flood recession. Degradation of terrestrial organic matter occurred mainly on the floodplain at increased floodplain residence times. Our data suggest that floodplains become more intense hotspots at prolonged travel time of the flood pulse over the floodplain. © 2016, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83324
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: Department of Environmental Systems Science, Institute of Biogeochemistry and Pollutant Dynamics, Aquatic Chemistry, ETH Zürich, Universitätstrasse 16—CHN F14, Zurich, Switzerland; Surface Waters—Research and Management, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Seestrasse 79, Kastanienbaum, Switzerland
Recommended Citation:
Zuijdgeest A.,Baumgartner S.,Wehrli B.. Hysteresis effects in organic matter turnover in a tropical floodplain during a flood cycle[J]. Biogeochemistry,2016-01-01,131(2018-01-02)