Comparison of the Phytoplankton Community in Major Rivers of the Taihu Basin
Comparison of the Phytoplankton Community in Major Rivers of the Taihu Basin
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发表时间：
2011
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通讯作者：
Gao Junfeng
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作者：
Gao Junfeng
为了解太湖流域不同河流浮游植物群落特征及其与环境因子的关系，于2010年春季（4月13日~ 22日）和夏季（7月10日~ 19日）对太湖流域不同河流的浮游植物进行了采样分析。隐藻属，Aulacoseira sp.，流入河流中的优势属为脆杆藻属和舟形藻属，Scenedesmu sp.，隐藻属，春季出流河中的主要属为星藻属（Asterionella sp.）和新月藻属（Closteria spsp.in十字花科，隐藻属，Euglena和Microcystis sp.为Aulacoseira sp.，栅藻属、隐藻属，太湖sp.in流域浮游植物群落在时间和空间分布上都存在差异，并计算了几种多样性指数，结果表明：春季浮游植物多样性指数略高于夏季，夏季浮游植物多样性指数高于春季，夏季浮游植物多样性指数高于春季，夏季浮游植物多样性指数高于春季，夏季浮游植物多样性指数高于夏季，夏季浮游植物多样性指数高于春季，夏季浮游植物多样性指数高于夏季。多样性指数与环境因子之间的线性回归表明，Shannon-春季Wiener多样性指数与电导率、总磷（TP）、总氮（TN）、总悬浮物（SS）、化学需氧量（CODMn）、硝酸盐（NO3--N）相关性较强，夏季与电导率、硝酸盐（NO3--N）、化学需氧量（CODMn）相关性较强。典范对应分析（CCA）排序表明，春季对浮游植物群落影响最大的环境因子是SS、TN和电导率，夏季是CODMn、NO3--N和TN。
Phytoplankton assemblages were sampled in spring(13th-22nd April) and summer(10th-19th July),2010,and were compared in order to obtain basic information of the community of phytoplankton and their relationships with environmental factors among different rivers in the Taihu basin.Samples for phytoplankton were both identified and counted under a microscope at 400×.The results of counting shown that Synedra sp.,Cryptomonas sp.,Aulacoseira sp.,Fragilaria sp.and Navicula sp.were the dominant genus in the inflowing rivers and Aulacoseira sp.,Scenedesmu sp.,Cryptomonas sp.,Asterionella sp.and Closterium sp.in outflowing rivers in spring.And in summer,the major genus in inflowing rivers were Synedra sp.,Crucigenia sp.,Cryptomonas sp.,Euglena and Microcystis sp.and were Aulacoseira sp.,Scenedesmus sp.,Cryptomonas sp.,Synedra sp.in outflowing rivers.That is to say the phytoplankton community is different between both in temporal and spatial distribution in Taihu basin.Then several diversity indices were calculated and the indices shown that diversity of phytoplankton in spring were slightly higher than in summer,and it was also varied among rivers.Liner regressions between diversity indices and environmental factors indicated that Shannon-Wiener diversity index had strong relationships with conductivity,total phosphorus(TP),total nitrogen(TN),total solid suspended(SS),chemical oxygen demand(CODMn) and nitrate(NO3--N) in spring and nitrate(NO3--N),chemical oxygen demand(CODMn) conductivity in summer.Further more,the most important environmental factors that regulated the phytoplankton community(basically analyzed according to predominated genus) were SS,TN,and conductivity in spring,and were CODMn,NO3--N and TN in summer as illuminated by the ordination of Canonical correspondence analysis(CCA).