二滩水库浮游植物群落结构特征及水环境因子的季节变化  

The Seasonal Change of Phytoplankton Community Structure and Water Environmental Factors in Ertan Reservoir

作　　者：李锋[1] 曾如奎 刘小帅 姚维志[1] 付梅 熊波[1] 何滔 苏胜齐[1] LI Feng;ZENG Rukui;LIU Xiaoshuai;YAO Weizhi;FU Mei;XIONG Bo;HE Tao;SU Shengqi(Research Central of Fishery Resources and Environment,College of Fisheries,Southwest University,Chongqing 400715;Yalong River Hydropower Development Company,Ltd.,Chengdu 610056,China)

机构地区：[1]西南大学水产学院渔业资源与环境研究中心,重庆400715 [2]雅砻江流域水电开发有限公司,成都610056

出　　处：《重庆师范大学学报（自然科学版）》2021年第3期50-61,F0002,共13页Journal of Chongqing Normal University:Natural Science

基　　金：雅砻江流域开发公司研发项目(No.YLDC-ZBA-2018089);国家自然科学基金(No.31472311)。

摘　　要：【目的】考察二滩水库的浮游植物群落结构特征和水环境因子的季节变化。【方法】于2018年12月—2019年10月调查分析了二滩水库5个断面的10个水环境因子和浮游植物的密度、生物量、优势种、Shannon-Wiener多样性指数(H)与Pielous均匀性指数(J)。【结果】二滩水库在调查期间整体上处于中营养状态。共检出浮游植物8门124种,绿藻门(Chlorophyta)和硅藻门(Bacillariophyta)为优势门类,分别有49和43种浮游植物。浮游植物密度及生物量范围分别为0.31×10^(6)~1.34×10^(6)个·L^(-1)、0.43~1.91mg·L^(-1),秋季的浮游植物密度最高,夏季的浮游植物生物量最高。H分布范围为2.21~3.96,J分布范围为0.70~0.93,浮游植物多样性较好,由此判断二滩水库整体处于无污染或轻污染状态。浮游植物密度与总氮含量(TN)呈统计学意义上的正相关关系(p<0.05),与高锰酸盐指数(PI)在p<0.01水平上呈统计学意义上的正相关关系;H与水温(WT)呈正相关关系,在p<0.01水平上具有统计学意义;J与PI在p<0.01水平上呈统计学意义上的负相关关系。【结论】二滩水库水质良好,浮游植物群落稳定,TN,WT和PI是影响浮游植物群落的主要环境因子。[Purposes]The purpose is to investigate the seasonal change of the phytoplankton community structure characteristics and water environmental factors in Ertan Reservoir.[Methods]In the four quarters from 2018 to 2019,10 parameters of water quality and 5 aspects of phytoplankton community(density,biomass,dominant species,Shannon-Wiener diversity index(H)and Pielous uniformity index(J))were analyzed in five sections.[Findings]The eutrophication degree of the reservoir was in mesotrophic state generally all year round.There were124 species of phytoplankton were found in the whole year,which belonged to 8 phyla.Chlorophyta and Diatoma were the dominant phyla,with 49 and 43 species respectively.The annual phytoplankton density and biomass ranged from 0.31×10^(6) to 1.34×10^(6) individuals·L^(-1) and from 0.43 to 1.91 mg·L^(-1),with the highest phytoplankton density in autumn and the highest phytoplankton biomass in summer.H ranged from 2.21 to 3.96,while Jranged from 0.70 to0.93.Phytoplankton diversity is well.According to the results of diversity index analysis,Ertan reservoir was in a state of no pollution or light pollution.Pearson correlation analysis showed that phytoplankton density was significantly positively correlated with TN(p<0.01)and significantly positively correlated with PI extremely(p<0.05).H was significantly positively correlated with WT extremely(p<0.01).J was significantly negatively correlated with PI extremely(p<0.01).[Conclusions]Ertan reservoir had good water quality and stable phytoplankton community.TN,WT,and PI were the main environmental factors affecting phytoplankton community.

关 键 词：二滩水库 水环境因子 浮游植物 Pearson相关性分析 

分 类 号：S932.7[农业科学—渔业资源] X171.1[农业科学—水产科学]