摘要
2013年5月、9月及10月在镜泊湖26个采样位点共采集到浮游藻类8门74属140种.其中绿藻门最多,共58种,占41.5%.浮游藻类组成以绿藻和硅藻占优,并且藻类群落结构存在明显的时空差异,各调查位点藻的种类范围在3~35种,密度范围在0.5×104~230.8×104个/L.调查期间,浮游藻类的Margalef指数、Shanoon-Wienner指数以及Pieloud指数范围分别为0.48~2.31,1.27~3.97,0.45~0.94,水体综合营养状态指数值TLI在40~60之间,总的来看,镜泊湖水体属于中营养-轻度富营养状态.Pearson相关分析结果显示,镜泊湖藻类群落分布受水环境因子影响明显.整体上,水温、DO、SD、CODMn及NH3-N是影响镜泊湖藻类种群分布格局的主要因素.
This research was performed at May, September and October in 2013 at 26 stations of Jingpo Lake, aiming to investigate the algal species. A total of 140 kinds of algal species belonging to 74 genera of 8 phyla were identified. The algal community was dominated by Chlorophyta and Bacillariophyta, and significant difference was found on algal composition across 26 sampling stations. The algae had the species ranging from 3 to 35 and abundance ranging from 0.5×104 to 230.8×104cells/L, and obviously different across the sampling stations in the three seasons. Overall, Margalef values varied from 0.48 to 2.31, while Shannon-Wienner and Pieloud varying from 1.27 to 3.97 and 0.45 to 0.94, and TLI of the water varied from 40 to 60, both showing that the water status of Jingpo Lake varied from middle nutrition to light eutrophication. Pearson correspondence analysis was applied to explore the relationship between algal species and environmental parameters by SPSS 13.0. The result showed that water temperature, dissolved oxygen(DO), transparency(SD), permanganate index(CODMn) and ammonia nitrogen(NH3--N) were the most important factors influencing the distribution of algal species across the 26 sampling stations. Besides these, the other factors just like total nitrogen(TN) and fluorides(F) were also important to the algal species.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2015年第11期3403-3413,共11页
China Environmental Science
基金
国家水体污染控制与治理科技重大专项(2013ZX07502001)
关键词
镜泊湖
藻类组成
营养等级
环境因子
Jingpo Lake
algae composition
nutrition level
environmental factors