生态环境学报Issue(2)：319-324,6.
北方干旱区湖泊湿地沉积物有机碳分布及碳储量特征研究--以乌梁素海为例
Spatial distribution and storage characteristic of organic carbon in sediments of lake wetland in northern arid areas:a case study of Wuliangsuhai Lake
摘要
Abstract
Based on the on-site sampling and laboratory experiments in Wuliangsuhai Lake, this paper studies the characteristics of the TOC distribution in the 30 cm sediment of and carbon sequestration and the relationship with TN, TP, aquatic plants and sediment texture, as well as the sources of organic carbon. The results showed that the SOC distribution has a certain regularity, in the north Lake is higher than the south, enriched in the middle of lake. On the vertical profile, TOC are decreasing with increasing depth of sediment in the vertical direction. TOC/TN ratios of surface sediments change from 9 to 36, average is 20.2. It related that the source of TOC is mainly to endogenous and exogenous, the exogenous is dominant. Organic carbon deposition rate in the sediment of Wuliangsuhai Lake is 169.55 g∙m-2∙a-1. Organic carbon density is 5.21 kg∙m-2, and carbon stored in 30 cm depth of the sediments, is 134.39×104 t. There are significant positive correlation between TOC and TN, which related that TOC and TN have same source, total nitrogen exist mainly in organic nitrogen forms. TOC content is mainly absorbed in cosmid. The 51%and 22%of TOC content is in the<63μm and 63~125μm cosmids respectively. In the Wuliangsuhai Lake, reeds is the mainly aquatic plants, which measure of area is achieve half of the whole lake area. With increasing of reed area in nearly 30 years, it promoted the sediment carbon sequestration capacity.关键词
湖泊/湿地/干旱区/有机碳/碳储量/沉积物/乌梁素海Key words
lake/wetland/arid areas/TOC/carbon storage/sediment/Wuliangsuhai Lake分类
资源环境引用本文复制引用
刘旭,李畅游,贾克力,张生,史小红..北方干旱区湖泊湿地沉积物有机碳分布及碳储量特征研究--以乌梁素海为例[J].生态环境学报,2013,(2):319-324,6.基金项目
国家自然科学基金项目(40901262 （）
50569002 （）
50669005 （）
51069007 （）
51269017 （）
51269016) （）
