2015年秋季千里岩岛海域浮游植物群落结构特征

Community Structure Characteristics of Phytoplankton of Qianliyan Island in the Autumn of 2015

【目的】为了了解千里岩岛附近海域浮游植物状况。【方法】以2015年秋季在该海域的监测数据为基础,并结合2013年调查数据,分析该海域浮游植物的变化情况。【结果】2015年秋季千里岩岛海域发现浮游植物37种,由硅藻和甲藻组成,平均密度为3.23×105个/m3,监测区主要的优势种为圆筛藻(Coscinodiscus sp.)和虹彩圆筛藻(Coscinodiscus oculusiridis),多样性指数为2.13~3.42,平均为2.74。【结论】与2013年调查数据比较,千里岩岛海域浮游植物种类数、密度和多样性指数有所增长,分析原因可能是由于调查季节不同。

【Objective】In order to know the status of phytoplankton in the sea area of Qianliyan Island.【Methods】Based on the monitoring data of this area in the autumn of 2015,combined with the investigation data of 2013,the changes in phytoplankton in the area were analyzed.【Results】The results showed that 37 phytoplankton species were identified,belonging to bacillariophyta and dinophyta.The average abundance of phytoplankton was 3.23×10 5 cells/m 3.Coscinodiscus sp.and Coscinodiscus oculusiridis were the main dominant species.The range of Shannon Weaver index of phytoplankton in the monitoring waters was 2.13~3.42,with an average of 2.74.【Conclusion】Compared with the data from 2013,the number of species,Shannon Weaver index and abundance of phytoplankton increased,which might be due to the different survey seasons.