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首页> 外文期刊>Environmental Monitoring and Assessment >Spatial distribution patterns of annual soil carbon accumulation and carbon storage in the Jiuduansha wetland of the Yangtze River estuary
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Spatial distribution patterns of annual soil carbon accumulation and carbon storage in the Jiuduansha wetland of the Yangtze River estuary

机译：长江口九段沙湿地土壤年碳积累和碳储量的空间分布格局

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摘要

Wetlands are important carbon (C) pools for terrestrial ecosystems, and C stored in different types of wetlands accounts for about 30% of total terrestrial C. As one of the most important ecological barriers in Shanghai, with functions of climate regulation, interception, and purification, and as a C sink, the Jiuduansha wetland has received research attention. However, little research has been done on the spatial differences in amount of average annual net C accumulation and C storage of each shoal: Jiangya Nansha, Shangsha, and Zhongxiasha. In this study, plant biomass, plant organic C, soil respiration, soil organic C content, and soil bulk density of different vegetation zones in the three shoals were analyzed to determine the spatial variability of annual net C accumulation capability and soil organic C storage of the Jiuduansha wetland. The results showed that the Zhongxiasha shoal played the most important role as a C sink, and it accumulated 77,839.44 t organic C per year. Regarding the annual C accumulation capacity per unit area, the Phragmites communis zone was higher than for all other vegetation zones, indicating that P. communis had the greatest C accumulation capacity. 7835.38 t, 46,827.41 t, and 173,623.1 t of organic C were stored in the Jiangya Nansha, Shangsha, and Zhongxiasha shoals, respectively. The C storage in soil was closely related to annual C accumulation, and there were two main reasons for the difference of spatial pattern of annual C accumulation: biomass and properties of plants and the properties of tidal water.
机译：湿地是陆地生态系统的重要碳库，储存在不同类型湿地中的碳约占陆地总碳的30％。湿地是上海最重要的生态屏障之一，具有气候调节，拦截和除尘功能。九段沙湿地作为一种碳汇，已经得到了研究的重视。但是，关于江滩南沙，上沙和中下沙的平均年净碳积累量和碳储存量的空间差异的研究很少。本研究分析了三个浅滩不同植被带的植物生物量，植物有机碳，土壤呼吸，土壤有机碳含量和土壤容重，确定了年净碳累积能力和土壤有机碳储量的空间变异性。九段沙湿地。结果表明，中夏沙滩作为碳汇最重要，每年累积有机碳77,839.44 t。关于单位面积的年碳积累量，芦苇地带高于所有其他植被带，表明该野菜的碳积累量最大。江雅南沙，上沙和中下沙浅滩分别储存了7835.38吨，46827.41吨和173623.1吨的有机碳。土壤中的碳储量与年碳累积量密切相关，造成年碳累积空间格局差异的两个主要原因：植物的生物量和特性以及潮水的特性。

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