Dynamics of organic carbon between the Amazon River and flood plain lakes

被引:0
作者
Moreira-Turcq, P. [1 ]
Barroux, G. [1 ]
Bernardes, M. [1 ]
Bonet, M.-P. [1 ]
Maurice-Bourgoin, L. [1 ]
Perez, M. [1 ]
Seylerz, P. [1 ]
机构
[1] Univ Fed Fluminense, Dept Geoquim, LMTG, UMR,IRD, Rio De Janeiro, Brazil
来源
Dynamics and Biogeochemistry of River Corridors and Wetlands | 2005年 / 294卷
关键词
Amazon River; dynamics; flood plains; organic carbon; organic matter;
D O I
暂无
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Water is constantly exchanged between river channels and flood plain lakes. Little is known about the flux at which organic carbon is transferred to and from lakes, and the residence time of flood plain storage. Flux has a special importance for the carbon cycle, especially in the Amazon basin. During four hydrological years organic carbon behaviour and its fluxes were studied in an Amazon flood plain and in the Amazon River. In the Amazon River, particulate organic carbon contents is very constant and represents approx. 2% of the total suspended matter. However, in Amazon flood plain lakes organic carbon content is very variable and represents 2-30% of the total suspended matter and can reach 40-50% of suspended matter during extensive phytoplankton blooms. Dissolved organic carbon is also very variable (5-30 mg 1(-1)) in flood plain lakes, while in the Amazon River its concentration is between 3 and 5 mg 1(-1). Flood plain lakes are an important source of organic carbon to the Amazon River and are also a sink for Amazon particulate organic carbon.
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页码:19 / 26
页数:8
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