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地理科学  2003 

珠江水体悬浮物颗粒有机碳稳定同位素组成及分布特征

, PP. 471-476

Keywords: 珠江,悬浮物,颗粒有机碳,δ13C,分布

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Abstract:

研究了珠江三干流西江、北江和东江水体中悬浮物颗粒有机碳稳定碳同位素的组成、分布以及季节变化特征。研究结果显示可以根据C3、C4植物及悬浮物的δ13C值区分不同流域的植被覆盖状况;东江流域水土流失区以草地、农田为主,C4植物影响较大;北江水体中颗粒有机碳主要来源于森林覆盖区,同位素组成受C3植物影响较大;西江水体中颗粒有机碳同位素组成介于其间,同时受C3、C4植物影响,颗粒有机碳部分来源于森林覆盖土壤,部分来源于草地和农田。

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