Effect of nutrient level on phytoplankton community structure in different water bodies

查看全文 作　　者：Wei [1]Zhu;Lei [2]Wan;Lianfang [1]Zhao

机构地区：[1]College of Environmental Science and Engineering, Hohai University, Nanjing 210098, China;[2]College of Environmental Engineering, Xuzhou Institute of Technology, Xuzhou 221008, China

出　　处：《Journal of Environmental Sciences》索引2010年第22卷第1期,共8页

基　　金：supported by the Natural Science Foundation of Jiangsu Province (No.BK2006710) ;the Hi-Tech Research and Development Program (863) of China (No:2003AA601100) 摘　　要：Increasing levels of pollution within water bodies can cause eutrophication and an associated rapid growth in and reproduction of phytoplankton. Although most frequently occurring in bodies of water such as lakes and dams, in recent years an increasing number of river systems in China have suffered serious algal blooms. The community structure of phytoplankton may differ, however, dependent on the hydrodynamic conditions and nutrient levels within the water body. The field investigation results obtained from a stagnant river in Suzhou City and Taihu Lake, China, showed that in water with higher concentrations of nitrogen and phosphorus, Chlorophyta became the predominant species and in water with lower concentrations of nitrogen and phosphorus, Cyanobacteria became the predominant species. Growth experiments with competitive species, Microcystis aeruginosa Kutz and Scenedesmus quadricauda (Turp.), were conducted at three different nutrient levels. The biomass of algae in pure and mixed cultures was measured under conditions of different N/P ratios at oligotrophic, eutrophic and hypertrophic nutrient levels. The results indicated that the most suitable state for the growth and reproduction of M. aeruginosa and S. quadricauda were eutrophic conditions in both pure and mixed cultures. Under competition, however, the lower medium nutrient levels favoured M. aeruginosa, while the higher medium nutrient levels better suited S. quadricauda. Under similar hydrodynamic conditions, the community structure of phytoplankton in the water body was determined by the dominant species in competition for nutrients. 关键词：水体富营养化水体营养水平植物群落结构铜绿微囊藻水动力条件河流系统混合培养生物量测定

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Effect of nutrient level on phytoplankton community structure in different water bodies

参考文献(25)

引证文献(28)

耦合文献(1021)

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