【摘要】 2010年9月和2011年1月、4月、7月共4次对江阴6条主要河道的浮游藻类群落特征开展调查分析。共发现浮游藻类7门141属种,种类丰富度和现存量夏秋季高于秋冬季。优势种属呈季节性演替,即冬季梅尼小环藻(Cyclotellameneghiniana)、颗粒直链硅藻(Aulacoseira granulata)-春季梅尼小环藻、啮蚀隐藻(Cryptomonas erosa)、裸藻属(Euglenaspp.)、衣藻属(Chlamydomonas spp.)、卵囊藻属(Oocystis spp.)-夏季巨颤藻(Oscillatoria princeps)、阿氏浮丝藻(Planktothrixagardhii)-秋季巨颤藻、阿氏浮丝藻、梅尼小环藻。南北向河道(锡澄运河、白屈港河和张家港河)的浮游藻类季节波动性大于东西向河道(应天河、东横河和西横河)。通过指示生物法,调查河道处于α,β-中污染状态。更多还原

【Abstract】 Phytoplankton assemblages were sampled in September,2010,November,April and July,2011 in main rivers of Jiangyin city of Taihu basin.141 species / genera belonging to 7 phyla were identified.The results indicated higher species richness and standing crop of phytoplankton during summer and autumn than during winter and spring.The dominant algal group during winter and spring were centric diatom(Cyclotella meneghiniana,Aulacoseira granulata),Cryptophyta(Cryptomonas erosa),Euglenophyta(Euglena spp.) and Chlorophyta(Chlamydomonas spp.and Oocystis spp.).The community during summer and autumn was dominated by Cyanobacteria(Oscillatoria princes,Planktothrix agardhii) and diatom(C.meneghiniana).The seasonal variation among north-south rivers(Xicheng river,Baiqugang river and Zhangjiagang river) was much severer than that among east-west rivers(Yingtian river,Xiheng river and Dongheng river).It indicated that main rivers were in α,β-type moderate pollution by saprobic indicator.更多还原