摘要
为了了解金沙江上游苏洼龙水电站建设期影响区域浮游植物群落结构与水质现状,为库区形成后区域性水生态保护措施的制定提供理论依据,于2019年5月(平水期)和8月(丰水期),对影响区域内的5个采样点进行浮游植物及水质调查,并作相关性分析。结果显示:2次调查共采集到浮游植物4门31属88种,其中硅藻门为绝对的优势类群,共79种,蓝藻门5种,绿藻门3种,裸藻门仅1种。主要优势种为细等片藻(Diatoma tenue)、念珠等片藻(D.moniliforme)、极细微曲壳藻(Achnanthes minutissima)和小内丝藻(Encyonema minutum);硅藻细胞密度在0.05×10^(6)~0.20×10^(6) cells/L变化,平均值为0.11×10^(6) cells/L。浮游植物Shannon-wiener多样性指数(H)、Margalef丰富度指数(D_(ma))和Pielou(J)均匀度指数变化范围分别为2.05~2.90、0.83~1.96和0.82~0.91。根据浮游植物细胞密度及生物多样性指数综合评价,金沙江苏洼龙段水质为轻污染极贫营养型。Pearson相关性分析结果显示,水温、电导率、盐度、总氮和磷酸盐是影响该河段浮游植物群落结构变化的主要环境因子。
To understand the phytoplankton community structure and water quality status in the affected region of upper Chin-sha river during the construction of Suwalong hydropower station,and to provide theoretical basis for regional water ecological protection after reservoir inpoundment,we carried out phytoplankton and water quality investigation at 5 sampling sites in the affected region in May(normal water season)and August(wet season)of 2019,and the correlation of phytoplankton community and the water quality indicators were analyzed.Results were as follows:A total of 88 phytoplankton species from 31 genera and 4 phyla were collected during the two surveys,with the absolute dominance of diatoms(79 species),followed by cyanobacteria(5 species),chlorophyta(3 species)and euglenophyta(1 species).The dominant species were Diatoma tenue,Diatoma moniliforme,Achnanthes minutissima,and Encyonema minutum.The range of diatom cell density was 0.05×10^(6)~0.20×10^(6) cells/L,with the average value of 0.11×10^(6) cells/L.The Shannon-wiener diversity(H),Margalef richness(D_(ma))and Pielou evenness(J)indices of phytoplankton community ranged from 2.05 to 2.90,0.83 to 1.96 and 0.82 to 0.91,respectively.Comprehensive evaluation based on phytoplankton cell density and community biodiversity shows that the water quality in Suwalong section of Chin-sha River was oligotrophic with light pollution.Pearson correlation analysis shows that water temperature,conductivity,salinity,total nitrogen and phosphate were the main environmental factors affecting the phytoplankton community structure in the surveyed river reach.
作者
陈俭勇
孙婷婷
李红涛
李妮娅
张俊华
张亚
陶敏
汤婷
陈征
胡江军
CHEN Jian-yong;SUN Ting-ting;LI Hong-tao;LI Ni-ya;ZHANG Jun-hua;ZHANG Ya;TAO Min;TANG Ting;CHEN Zheng;HU Jiang-jun(Wuhan Sinoeco Ecological Science & Technology Co.,LTD,Wuhan 430080,China;Huadian Jinsha River Upstream Hydropower Development Co.LTD.Chengdu 610000,China)
出处
《淡水渔业》
CSCD
北大核心
2021年第2期87-97,共11页
Freshwater Fisheries
基金
金沙江上游苏洼龙水电建设期生态调查监测服务项目。
关键词
金沙江
苏洼龙水电站
浮游植物
群落结构
水质
环境因子
Chin-sha River
Suwalong hydropower station
phytoplankton
community structure
water quality
environmental factors
