海洋科学2016，Vol.40Issue(2)：1-10,10.DOI:10.11759/hykx20150518001
长江口及其邻近海域叶绿素a分布特征及其与低氧区形成的关系
Distribution of chlorophylla and its correlation with the formation of hypoxia in the Changjiang River Estuary and its adjacent waters
摘要
Abstract
Based on multi-discipline surveys in the Changjiang River Estuary and its adjacent waters in March and August 2013, the distribution of chlorophyll a (Chl a) as well as its correlation with major environment factors were studied. The results indicated that Chl a concentration was higher during the flood period, with an average of 5.18μg/L and a maximum of 32.05μg/L. The Chl a concentration during the flood period showed a fluctuating growth trend as compared to historical data, and the water containing a relatively high Chla level appeared in the middle of the diluted area bounded by 122.5–123°E. A low level of dissolved oxygen (DO) and hypoxia was observed in the near-bottom waters during the flood period, with a minimum value of 0.64 mg/L. These results indicated that the hypoxic zone expanded and had a trend of moving northward, while the minimum DO value decreased significantly as compared to the historical records. The lower DO zone in near-bottom water was associated with the surface water with higher Chla, indicating a close correlation between DO at the bottom and Chla. Therefore, with strong water stratification, the flourishing of phytoplankton in the surface water may directly contribute to the formation of low-oxygen zones in near-bottom water.关键词
叶绿素a/长江口/浮游植物/冲淡水/溶解氧Key words
chlorophylla(Chl a)/Yangtze River Estuary/phytoplankton/dilution water/dissolved oxygen分类
海洋科学引用本文复制引用
李照,宋书群,李才文..长江口及其邻近海域叶绿素a分布特征及其与低氧区形成的关系[J].海洋科学,2016,40(2):1-10,10.基金项目
中国科学院战略性先导科技专项(A 类)资助(XDA11020302) （A 类）
国家基金委-山东省联合基金项目(U1406403) （U1406403）
中国科学院“百人计划”项目资助@@@@ the Strategic Priority Research Program of the Chinese Academy of Sciences, No. XDA11020302 （）
the Joint Research Fund of NSFC-Shandong Province, No. U1406403 （）
the 100 Talents Program of the Chinese Academy of Sciences。 （）
