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引用本文:武丹,王海英,张震.天津于桥水库夏季浮游生物调查及群落结构变化.湖泊科学,2013,25(5):735-742. DOI:10.18307/2013.0516
WU Dan,WANG Haiying,ZHANG Zhen.Investigation of summer plankton community structure in Yuqiao Reservoir,Tianjin. J. Lake Sci.2013,25(5):735-742. DOI:10.18307/2013.0516
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天津于桥水库夏季浮游生物调查及群落结构变化
武丹, 王海英, 张震
天津市环境监测中心, 天津 300191
摘要:
为了解于桥水库富营养化状况,于2011年7月对于桥水库水质、浮游生物进行了调查.结果表明,于桥水库综合营养状态指数(TLI(∑))为45.8,属于中营养水平.浮游植物共计8门59种,平均丰度为312.40×104cells/L,平均生物量为5.30 mg/L,以蓝、绿藻为主,优势种为铜绿微囊藻(Microcystis aeruginosa)、水华微囊藻(Microcystis flos-aquae)和单角盘星藻具空变种(Pediastrum simplex var.duodenarium).浮游动物共计16种,平均丰度为53.2 ind./L,平均生物量为11.58 mg/L,以长额象鼻蚤(Bosmina longirostris)和近邻剑水蚤(Cyclops vicinus)为优势种.依据多样性指数、均匀度指数和丰富度指数对于桥水库浮游生物进行评价,表明于桥水库处于中~重污染水平,这与采用TLI(∑)的评价结果较为一致.与历史同期调查结果对比得出,于桥水库浮游植物丰度、生物量增加,浮游动物种类减少,而生物量增加,于桥水库由硅-蓝藻型水库过渡为硅-绿藻型水库,最终向蓝-绿藻型水库演变.
关键词:  于桥水库  浮游生物  群落结构  变化趋势
DOI:10.18307/2013.0516
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Investigation of summer plankton community structure in Yuqiao Reservoir,Tianjin
WU Dan, WANG Haiying, ZHANG Zhen
Tianjin Environmental Monitoring Center, Tianjin 300191, P. R. China
Abstract:
In July of 2011,the water quality and the structures of plankton community were investigated in Yuqiao Reservoir to evaluate its trophic state.The comprehensive trophic level index (TLI(Σ)) is 45.8,which indicates the reservoir is mesotrophic.59 phytoplankton species in total have been identified.The average phytoplankton abundance is 312.40×104 cells/L,and the average biomass is 5.30 mg/L.The phytoplankton community is mainly composed by Cyanophyta and Chlorophyta.Microcystis aeruginosa, Microcystis flos-aquae and Pediastrum simplex var.duodenarium are dominated species.Total of 16 zooplankton species have been identified.The average zooplankton abundance is 53.2 ind./L,and the average biomass is 11.58 mg/L.The zooplankton community is mainly composed of Bosmina longirostris and Cyclops vicinus.Based upon the analyses of the Shannon-Wiener index, Pielou index and Margalef index,the reservoir is between medium pollution level and heavy pollution level,which is similar to the evaluation results of nutritional status using TLI(Σ).Comparative analysis has been carried out between historical data and the present investigation,and the results show that both abundance and biomass of phytoplankton have been increased,and zooplankton species have reduced while zooplankton biomass has increased.This indicates the evolution of Yuqiao Reservoir from a Bacillariophyta-Cyanophyta dominated reservoir into a Bacillariophyta-Chlorophyta dominated reservoir,and finally into a Cyanophyta-Chlorophyta dominated reservoir.
Key words:  Yuqiao Reservoir  plankton  community structure  variation trend
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