Effect of hydrological condition on phytoplankton community variation in Suzhou Creek(Chinese)
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摘要: 在2005年12月至2006年7月期间通过对苏州河武宁路桥处浮游植物和水体流速的调查研究，比较分析了苏州河武宁路桥处浮游植物种类组成、数量、密度和优势种等的变化与流速等水文条件之间的关系.分析结果表明：在丰水期时,主要优势种小环藻Cyclotella sp.和小球藻Chlorella vulgaris个体数量在不同流速下的变化趋势非常相似.且在不同水文期藻类的数量、种类和叶绿素a的含量有很大变化：丰水期,藻类数量和种类明显大于枯水期以及平水期.在枯水期、平水期和丰水期中,平均叶绿素a含量小潮时都要高于大潮时.Abstract: This paper studied the phytoplankton and flow velocities of Suzhou Creek from December,2005 to July,2006 and discussed the correlation between them. The results showed that, in high-flow period, the quantity variations of Cyclotella sp.and Chlorella vulgaris were similar in different flow velocities. Cyclotella sp. and Chlorella vulgaris were both main dominant species of phytoplankton. And there were large variation in the quantity, species and the content of chlorophyll a of phytoplankton in different hydrographic periods.The quantity and species of algae were higher and more in high-flow period than that in low-flow period and average-flow period.During the three periods, the average content of chlorophyll a in neap tide was more than that in spring tide.
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