河流型水库浮游植物群落结构及与环境因子关系研究  

Phytoplankton Community Characteristics and Its Relationship with Environmental Factors in a River-type Reservoir

作　　者：黄向阳[1] 艾孙阳 何鑫 吴小刚 陈晓飞 HUANG Xiang-yang;AI Sun-yang;HE Xin;WU Xiao-gang;CHEN Xiao-fei(School of Urban Construction,Yangtze University,Jingzhou 434103,P.R.China;Hubei Academy of Environmental Sciences,Wuhan 430072,P.R.China)

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]湖北省生态环境科学研究院,湖北武汉430072

出　　处：《水生态学杂志》2023年第6期96-103,共8页Journal of Hydroecology

基　　金：湖北省环保科研专项(2018HB01)。

摘　　要：研究河流型水库浮游植物群落结构与水环境因子的关系,为山区河流型水库流域管理、水资源保护以及开发利用提供参考。2018-2019年在湖北恩施大龙潭水库布设10个采样点,对水环境因子和浮游植物进行调查,利用Pearson相关性分析法对调查结果进行分析。调查期间共鉴定出藻类186种,隶属于7门89属,其中硅藻门79种、绿藻门55种、蓝藻门29种、甲藻门9种、隐藻门7种、裸藻门6种、金藻门1种。Margalef丰富度指数平均值为0.94~1.30,依据丰富度指数判断水质整体为中污染。水库浮游植物总细胞密度为3.889×10^(5)~282.983×10^(5)个/L,均值为79.864×10^(5)个/L,夏季较高,冬季显著下降。Pearson相关性分析表明,浮游植物总密度与温度、溶解氧、pH、总磷、高锰酸盐指数呈极显著正相关;与电导率、硝酸盐氮呈极显著负相关。冗余分析表明,温度、pH和高锰酸盐指数是影响水库浮游植物群落结构最主要的环境因子。大龙潭水库较高的海拔和较大的流域面积有利于硅藻生长。Dalongtan reservoir is a river-type reservoir located on a tributary of the middle Yangtze River,and playing important role as a permanent drinking water source for the urban area of Enshi Autonomous Prefecture.In this study,we investigated the phytoplankton community structure and analyzed its relation-ship with water environment factors of Dalongtan reservoir using Pearson correlation analysis.We aimed to provide a reference for the management,water resource conservation and development of river-type reser-voirs in mountainous areas.From December 2018 to November 2019,seasonal investigation of the water en-vironment factors and phytoplankton were conducted at 10 sampling sites in the Dalongtan reservoir basin.A total of 186 phytoplankton species from 89 genera and 7 phyla were identified during the investigation,with species number,in descending order:diatoms(79 species)>chlorophyta(55 species)>cyanobacteria(29 species)>dinophyta(9 species)>cryptophyta(7 species)>euglenophyta(6 species)>chrysophyta(1 species).The average value of the Margalef richness index ranged from 0.94 to 1.30,indicating that the lev-el of water pollution was moderate.Total cell density of phytoplankton in the reservoir varied from 3.889×10^(5) to 282.983×10^(5) cells/L during the investigation period and was higher in summer and decreased signifi-cantly in winter,with an average value of 79.864×10^(5) cells/L.Pearson correlation analysis shows that the to-tal phytoplankton density had a very significant positive correlation with temperature,dissolved oxygen,pH,total phosphorus and the permanganate index,and a very significant negative correlation with the elec-trical conductivity and nitrate nitrogen.Redundancy analysis shows that temperature,pH and the permanga-nate index were the environmental factors most affecting phytoplankton community structure.Overall,the high altitude and large water area of Dalongtan reservoir are favorable for the growth of diatoms.Further-more,the reservoir is deep,and cyanobacteria,staying in the upper lay

关 键 词：河流型水库 浮游植物 群落结构 环境因子 

分 类 号：X173[环境科学与工程—环境科学] X524