水生态学杂志2016，Vol.37Issue(5)：8-14,7.DOI:10.15928/j.1674-3075.2016.05.002
长江天鹅洲故道浮游植物群落结构及水质评价
Phytoplankton Community Structure and Water Quality Assessment in the Tian-e-zhou Oxbow of the Yangtze River
摘要
Abstract
Tian-e-zhou Oxbow,located in Shishou City of Hubei Province,is an important natural reserve for the Yangtze finless porpoise.Water quality monitoring and management in Tian-e-zhou Oxbow will support conservation of finless propoises and other aquatic life.In April,July and October of 201 1 and January and August of 2012, seasonal investigation of the phytoplankton community was carried out at ten sampling sites in the oxbow.The phy-toplankton community structure was analyzed and water quality was evaluated based on the results.The study will provide basic data to support the conservation effort in Tian-e-zhou Oxbow.A total of 143 phytoplankton species were detected,belonging to 7 phyla and 77 genera.Chlorophyta (32 genera,64 species)and Cyanophyta (14 genera,28 species),associated with nutrient rich water,dominated the phytoplankton community,accounting for 44.8% and 19.6% of the total species.Bacillariophyta (14 genera,22 species),Euglenophyta (3 genera,12 species),Chrysophyta (8 genera,9 species),Cryptophyta (3 genera,4species)and Pyrrophyta (3 genera,4 species)accounted,respectively,for 15.4%,8.4%,6.3%,2.8%and 2.8%of the total species.The average annual density of phytoplankton was 5.6 ×107cells/L,with Cyanophyta accounting for 88.8%of the total density, followed by chlorophyta,accounting for 7 .7%.The average annual value of phytoplankton biomass was 7 .2 mg/L, dominated by Bacillariophyta (61.5%),Cyanophyta (17.9%)and Chlorophyta (12.8%).Twelve species domi-nated during the investigation.Among them,1 1 species were identified as indicators of eutrophication,and Phor-midium mucicola,Microcystis aeruginosa,Merismopedia minima and Crucigenia quadrata formed a group.Evalua-ted according to the biomass and species dominating the phytoplankton community,the water quality of Tian-e-zhou Oxbow is eutrophic,consistent with the Shannon-wiener diversity index and Pielou evenness index.关键词
天鹅洲故道/浮游植物/群落结构/水质评价Key words
Tian-e-zhou Oxbow/phytoplankton/community structure/water quality分类
生物科学引用本文复制引用
黄丹,李霄,望志方,熊晶,沈建忠..长江天鹅洲故道浮游植物群落结构及水质评价[J].水生态学杂志,2016,37(5):8-14,7.基金项目
湖北长江天鹅洲白?豚国家级自然保护区管理处委托项目“天鹅洲故道水生生物资源调查”；世界自然基金会项目“长江天鹅洲故道小型鱼类资源评估”（2985）。 （）
