水华期间太湖梅梁湾微囊藻原位生长速率的测定  

The determination of in situ growth rates of the bloomed Microcystis in Meiliang Bay, Lake Taihu

作　　者：吴晓东[1,2] 孔繁翔[1] 

机构地区：[1]中国科学院南京地理与湖泊研究所,湖泊与环境国家重点实验室,江苏南京210008 [2]中国科学院研究生院,北京100049

出　　处：《中国环境科学》2008年第6期552-555,共4页China Environmental Science

基　　金：国家自然科学基金资助项目(40671068,40471045);国家“973”项目(2002CB412305)

摘　　要：2007年8月太湖发生水华期间采用细胞分裂频率法(FDC)对太湖梅梁湾蓝藻的原位生长速率进行了测定.结果表明,微囊藻的细胞分裂频率有明显的日变化规律,即白天高,最大值约为20%;夜晚低,最小值约为5%.计算得到4个采样点蓝藻原位生长速率分别为0.23,0.19,0.37,0.26d-1.实验同时测定了水体的营养盐水平和叶绿素a的含量,表明较高的细胞分裂频率可能与水体中较高的营养盐水平、叶绿素a含量有关.The present study calculated the in situ growth rates of Microcystis in Meiliang Bay by the methods of FDC during an August bloom in 2007. The variation of the FDC showed clear phased cell division patterns during the daily examination with the maximum value of FDC in the daytime （about 20%） and the minimum value in night （about 5%）. The calculated in situ growth rates of the Microcystis at the four sampling stations were 0.23, 0.19, 0.37 and 0.36 d^-1. Meanwhile, the nutrients level and chlorophyll a contents were measured, and the results indicating that the higher frequency of dividing cells could be related with higher nutrients level and chlorophyll a contents.

关 键 词：太湖 蓝藻水华 微囊藻 原位生长 细胞分裂频率 

分 类 号：X171[环境科学与工程—环境科学]