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Field Observation of Lateral Detritus Carbon Flux in a Coastal Wetland

文献类型： 外文期刊

作者： Gao, Yu 1 ; Ouyang, Zutao 5 ; Shao, Changliang 6 ; Chu, Housen 7 ; Su, Yahn-Jauh 5 ; Guo, Haiqiang 1 ; Chen, Jiquan 5 ; Z 1 ;

作者机构： 1.Fudan Univ, Minist Educ, Key Lab Biodivers Sci & Ecol Engn, Coastal Ecosyst Res Stn,Yangtze River Estuary, Shanghai 200438, Peoples R China

2.Fudan Univ, Inst Ecochongming SIEC, Shanghai 200438, Peoples R China

3.Chinese Acad Fishery Sci, Key Lab East China Sea & Ocean Fishery Resources, Shanghai 200090, Peoples R China

4.Chinese Acad Fishery Sci, Sci Observing & Expt Stn Fisheries Resources & En, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China

5.Michigan State Univ, Ctr Global Change & Earth Observat, E Lansing, MI 48823 USA

6.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

7.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA

关键词： Estuarine ecosystems; Lateral carbon flux; Macro-detritus; Salt marsh; Tidal activity

期刊名称：WETLANDS （ 影响因子：2.204； 五年影响因子：2.653 ）

ISSN： 0277-5212

年卷期： 2018 年 38 卷 3 期

页码：

收录情况： SCI

摘要： The lateral transport of carbon has been increasingly recognized as an important component of carbon budget in wetlands. We studied a typical coastal salt marsh located at the estuary of the Yangtze River by measuring lateral transfer of macro-detritus carbon within a creek during each month's largest spring tide period, and simultaneously, we measured the gross primary production (GPP) by the eddy covariance (EC) method. The results showed a bimodal seasonal pattern of net detritus carbon export, with one peak associated with mainly green/fresh carbon materials and the other peak associated with mainly yellow-dark/senescent carbon materials. We also found that the export of green detritus carbon was highly correlated with plant phenology and the height of tides, suggesting influences from both the standing stock of living biomass and the force of tides. GPP measured by the EC technique (GPP(EC)) and by remote sensing (GPP(RS)) differed substantially. We found this difference was correlated well with the net export of green macro-detritus. In general, we concluded that the lateral flux is an important component of the carbon budget in the marsh and that to cross validate between GPP(EC) and GPP(RS), it must be included as a calibration term for computing GPP(EC).

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