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SEASONAL VARIABILITY OF STABLE CARBON AND NITROGEN ISOTOPE OF SUSPENDED PARTICULATE MATTER IN THE CHANGJIANG RIVER
Author(s): 
Pages: 546-552
Year: Issue:  5
Journal: OCEANOLOGIA ET LIMNOLOGIA SINICA

Keyword:  碳同位素氮同位素悬浮颗粒物长江;
Abstract: 在长江南通市区段国控断面(李港对照断面)上自1996-1999年每两个月定期采样,测定悬浮颗粒物的碳、氮同位素及其相关参数.研究发现:稳定碳同位素值分布区域在-23.6‰- -27.1‰之间;稳定氮同位素多分布在1.4‰-5.9‰.两者的季节变化趋势与陆源输入和现场浮游植物的组成和生长状况有关.δ15N 、C/N比值均不能严格体现物源影响,受到水体中有机质的转化和微生物活动的影响而被改造.借助简单模式,获得估算的陆源贡献随季节变化的规律,并证实在1998年夏长江南通的陆源输入有明显的增大,与1998年长江大洪水事件吻合.
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