东风西沙水源地浮游植物种类组成与数量分布特征

分析了东风西沙水源地浮游植物种类组成、优势种分布、群落结构分布以及多样性等特征.结果表明,东风西沙水源地共监测出藻类6门共64种（属）,分别为蓝藻、绿藻、硅藻、隐藻、裸藻、金藻,其中硅藻和绿藻共47种,为水源地的主要浮游植物种类;浮游植物优势种单一,主要为硅藻门的短小舟形、克洛脆杆藻,隐藻门的尖尾蓝隐藻,以及蓝藻门的铜绿微囊藻,且优势度值较小;监测期间浮游植物密度为8.20×10^5 ～8.40×10^6 cells/L,均值为3.71×10^6 cells/L;群落特征指数统计结果表明东风西沙目前水质较好,总体上处于轻或无污染状态.

The Phytoplankton Species Composition and Quantity Distribution in Dongfengxisha Water Sources

The species composition,dominant species distribution,abundance and distribution of phytoplankton,and the community structure diversity distribution in Dongfengxisha water sources area were analyzed.The results showed that：the following six categories of algae,namely the Cyanobacteria,Green algae,Diatoms,Cryptophyta,Bare algae,Golden algae,totally 64 species （genus）,in which a total of 47 kinds of Diatoms and Green algae,indicating that in this water sources area diatoms and green algae are the predominant species number; dominant species of phytoplankton are more single,mainly diatoms short boat-shaped door,Crowe Fragilaria,Cryptophyta blue tail tip,and cyanobacteria Microcystis aeruginosa and small dominance; By phytoplankton monitoring,the density is 8.20 × 105 to 8.40 × 106 cells/L,the mean density of the monitoring period for all monitoring was 3.71 × 106 cells/L; the currently water quality is acceptable,the whole state is light or non-polluting level.