---

作 者 ：林清,王绍令

期 刊 ：生态学报 2001年 21卷 5期 页码：806~809

关键词：沉水植物；龙须眼子菜；稳定碳同位素组成；环境因素；

Keywords:submerged plant, P. pectinatus, stable carbon isotopic composition, environmental factors,

摘 要 ：青康公路沿线一些河流和湖泊中同种沉水植物——龙须眼子菜 ( Potamogeton pectinatus)的稳定碳同位组成 (δ13C)变化在 -1 0 .92‰～ 2 2 .0 7‰之间 ,这些龙须眼子菜的 δ13C值大小为盐水湖 >淡水湖 >河流。根椐沉水植物的碳同位素分馏模式 ,对影响龙须眼子菜碳同位素组成的环境因素进行了探讨。结果表明 ,龙须眼子菜的碳同位素组成受水体环境因素影响。

Abstract:The stable carbon isotope composition (δ 13 C) of Potamogeton pectinatus in rivers and lakes along the Xining Yushu highway range from -22.07‰ to -10.92‰. Among the three types of water bodies, P. pectinatus growing in rivers and saltwater lakes show the lowest and highest 13 C/ 12 C ratios, respectively. Based on the fractionation model of stable carbon isotope in submerged plant, the important environmental factors may influence the δ 13 C of submerged plants, including...

---