武汉月湖近代沉积物中的硅藻组合与环境关系研究  

Relationship between diatom assemblage in modern sediments and the environment of Yuehu Lake in Wuhan

作　　者：胡胜华[1] 叶艳婷[1,2] 贺锋[1] 周巧红[1] 高云霓[1] 吴振斌[1] 

机构地区：[1]中国科学院水生生物研究所//淡水生态与生物技术国家重点实验室,湖北武汉430072 [2]中国科学院研究生院,北京10049

出　　处：《生态环境学报》2011年第3期490-498,共9页Ecology and Environmental Sciences

基　　金：国家自然科学基金项目(50808172);国家"十一五"水专项(2009ZX07106-002-004);湖北省科技攻关重大项目(2006AA305AA03);武汉市科技攻关项目(200860213022)

摘　　要：采集武汉月湖2处近代沉积物,分析了沉积硅藻组合与其环境关系,共发现24属83种硅藻。结果表明:2个柱状沉积物中硅藻优势属为小环藻属、直链藻属、舟形藻属、Cyclostephanos属。Z-1钻孔共有20属61种硅藻,Z-2钻孔共有24属68种硅藻。Z-1钻孔优势种为梅尼小环藻(Cyclotella meneghiniana)、颗粒直链藻(Aulacoseira granulata)、Navicula porifera、Cyclostephanos tholifomis。Z-2钻孔优势种为梅尼小环藻、颗粒直链藻、舟形藻(Navicula sp.)、Cyclostephanos invisitatus。就硅藻密度分布而言,总趋势上层最多,平均7.14×105～58.65×105 ind.g-1,中层其次,平均0.08×105～13.98×105 ind.g-1,下层最少,平均0.24×105～0.64×105 ind.g-1。硅藻种数最少的样品出现在沉积物中层,梅尼小环藻、颗粒直链藻、舟形藻、Navicula porifera、Cyclostephanos tholifomis、Cyclostephanos invisitatus的组合可以指示湖泊水体环境出现富营养化。通过探讨分析影响硅藻分布的环境因素,为恢复月湖近代水环境演化过程提供了依据。The diatom assemblages in 2 bored sediment cores in the Yuehu Lake were studied systematically and 83 species and varieties of diatom were found.The sedimental diatom of Z-1 bored had 61 species,and Z-2 had 68 species.The dominant species of Z-1 bored sediment cores were Cyclotella meneghiniana,Aulacoseira granulata,Navicula porifera and Cyclostephanos tholifomis,the dominant species of Z-2 bored sediment cores were Cyclotella meneghiniana,Aulacoseira granulata,Navicula sp.and Cyclostephanos invisitatus.The diatom density in the two cores showed similar trends：the highest density existed in the upper layer,with an average range of 7.14×105-58.65×105 individuals/g,which follwed by the intermediate layer presenting an average range of 0.08×105-13.98×105 individuals/g,and the lowest density was in the bottom layer,with an average range of 0.24×105-0.64×105 individuals/g.Some species,such as Cyclotella meneghiniana、Aulacoseira granulata、Navicula sp.、Navicula porifera、Cyclostephanos tholifomis、Cyclostephanos invisitatus and it＇s assemblages can be prescription to lake eutrophication.The paper provides a scientific basis for studying the evolution of modern aquatic environment of Yuehu Lake in Wuhan through analyzing effects of environmental factors on the distribution of diatoms.

关 键 词：武汉月湖 硅藻 营养演化 湖泊沉积物 

分 类 号：X142[环境科学与工程—环境科学]