水生态学杂志2017，Vol.38Issue(5)：46-54,9.DOI:10.15928/j.1674-3075.2017.05.007
千岛湖浮游植物群落结构时空分布及其与环境因子的关系
Spatial and Seasonal Distribution of Phytoplankton in Qiandao Lake and Relationship with Environmental Factors
摘要
Abstract
Phytoplankton is a good indicator of changes in the water environment of rivers, lakes and reservoirs. In this study, we characterized the phytoplankton community structure and its relationship to environmental factors in Qiandao Lake, based on monthly sampling in 2010 and multivariate statistical analysis. The study will help to un-derstand of the changes in water quality in Qiandao Lake and provide data to support conservation and management of aquatic resources. Qiandao Lake, originally named Xin′anjiang Reservoir is in the mountain region of western of Zhejiang Province, near the border of Anhui Province, and is an important water resource of Qiantang River. Five sampling sites were located on Qiandao Lake: S1 , in the river section of upper Qiandao Lake; S3 and S4 , in the transition zone between riverine and open water sections;S8 and S9, in the open lake area of lower Qiandao Lake. From January to December of 2010 , composite water samples from different layers were collected monthly at each sampling site for phytoplankton identification, counting, density and biomass calculation. Environmental parameters were measured in situ and water samples collected for lab, including water temperature ( T ) , dissolved oxygen ( DO) , pH, diaphaneity ( SD) ,total nitrogen ( TN) , total phosphorus ( TP) , nitrate nitrogen ( NO3-N) , nitrite nitrogen ( NO2-N) , total ammonia nitrogen ( TAN) , permanganate Index ( CODMn ) , Chl-a and silicates ( SiO2-3 -Si) . A total of 223 species belonging to 8 phyla were identified, with absolute dominance by Chlorophyta, Bacillar-iophyta and Cyanophyta in terms of species number, density and biomass. Species number, density and biomass did not differ significantly among sampling stations. Total density and biomass of the phytoplankton community was also similar among the five stations, but varied significantly with season. Vertical distribution of phytoplankton den-sity and biomass peaked at depths of 4-8 m and then decreased. No significant spatial and seasonal variations were observed in Shannon-Wiener diversity and Pielou evenness indices, but differences in the Margalef species richness index were significant. Cluster analysis ( CA) and non-metric multidimensional scaling ( MDS) analysis show that the species composition of phytoplankton communities varied seasonally but not spatially. The seasonal species com-position of phytoplankton communities clustered into three groups:spring cluster ( SC) , winter cluster ( WC) and summer-autumn cluster ( SAC) . The SC was characterized by Melosira granulata, Melosira granulata var. angusti-ssima and Chroomonas acuta, the WC by Anabaena flos-aquae, M. Granulata var. angustissima and a species of the genus Fragilaria, and the SAC by Coelastrum reticulatum, A. flos-aquae and Cyclotella meneghiniana. There was a significant positive correlation of phytoplankton density and biomass with WT, pH, CODMn and Chl-a, and of biomass with SiO2-3 -Si, but significant negative correlations with SD and DO. Canonical correspondence analysis ( CCA) shows that WT, DO, pH and nitrate nitrogen were the key environmental factors responsible for differences in spatial and seasonal distribution of phytoplankton in Qiandao Lake.关键词
浮游植物/群落结构/时空分布/环境因子/新安江水库Key words
phytoplankton/community structure/spatial and seasonal distribution/environmental factors/Xin'an-jiang Reservoir分类
生物科学引用本文复制引用
胡忠军,莫丹玫,周小玉,任丽萍,王金朋,何光喜,陈来生,刘其根..千岛湖浮游植物群落结构时空分布及其与环境因子的关系[J].水生态学杂志,2017,38(5):46-54,9.基金项目
公益性行业(农业)专项"湖泊水库养殖容量及生态增养殖技术研究与示范" ( 201303056 ) （农业）
国家自然科学基金(31072218) （31072218）
国家科技支撑项目"水库生态保水渔业及水环境调控技术研究与示范(2015BAD13B02)" （2015BAD13B02）
上海高校知识服务平台上海海洋大学水产动物遗传育种中心(ZF1206). （ZF1206）
