三峡库区高岚河甲藻水华的初步研究  

PRELIMINARY RESEARCH ON THE ALGAL BLOOM OF PERIDINIOPSIS SP.IN GAOLAN RIVER OF THE THREE GORGES RESEARVOIR

作　　者：汤宏波[1] 刘国祥[1] 胡征宇[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

出　　处：《水生生物学报》2006年第1期47-51,共5页Acta Hydrobiologica Sinica

基　　金：中国科学院知识创新工程项目(KSCX2-SW-111);国家自然科学基金面上项目(30470140)资助

摘　　要：2005年2月中下旬,高岚河库湾发生拟多甲藻水华,本文研究了水华爆发期间藻类的生消过程及其基本组成,并分析了环境因子在水华形成和消亡过程中的作用机制。研究结果表明:超高的营养盐,如TN、TP等是此次水华发生的主要原因之一,其他物理条件,如气温、水温的回升等是重要的诱因。而水华消亡的原因是营养盐被不断繁殖的甲藻消耗,以至于不能满足甲藻的营养需求,最终部分甲藻下沉到底层。The environmental problems caused by the Three Gorges Dam extremely is worth paying attention. A part of Gaolan River became reservoir area after storing water. On 22 February 2005, a distinctive ＂algal bloom＂ was observed in Gaolan River and continued to March. The specie of forming＂algal bloom＂was a sort of Peridiniopsis sp. The density of Peridiniopsis sp and chl. a concentration reached 2.4 × 10^7cells/L and 330.73 mg/m^3 respectively during blooming. The algal bloom lasted about one month. In this paper the processes of the algal bloom and the basic phytoplankton composition were studied, and the functions of the environmental factors in the processes of the algal bloom in area scale were analysed. The environmental factors included water temperature, ammonium（ NH4） , nitrate （ NO3 ）, total nitrogen （ TN）, total phosphorus （ TP）, phosphate （ PO4 ）, dissolved oxygen （ DO）, CODm,, silicate（SiO2） and chlorophylla（chl, a ）. The studies revealed ： High concentration of TN and TP ect. in the surface layer were likely to be one of the factors supporting the ＂algal bloom＂in Gaolan Rive and suitable natural conditions also contributed to the process. When the nutritions in the upper layer were consumed away gradually by Peridiniopsis sp and finally were exhausted for the development of bloom, a port of Peridiniopsis sp Sank into the bottom layer.

关 键 词：三峡水库 高岚河 拟多甲藻 水华 环境因子 

分 类 号：Q178.1[生物学—水生生物学]