塔玛亚历山大藻和东海原甲藻对褶皱臂尾轮虫种群数量的影响  

Effects of Alexandrium tamarense and Prorocentrum donghaiense on rotifer Brachionus plicatilis population

作　　者：王丽平[1] 颜天[1] 谭志军[1] 周名江[1] 

机构地区：[1]中国科学院海洋研究所生态与环境重点实验室

出　　处：《应用生态学报》2003年第7期1151-1155,共5页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划项目 ( 2 0 0 1CB40 970 9);国家自然科学基金项目 ( 2 0 1770 2 3;4990 60 0 7;3 995 0 0 0 1;40 0 760 3 0 );中国科学院知识创新工程项目 (KZCX2 -2 0 6);院长基金;山东省科技攻关资助项目 ( 0 12 110 115 ) .

摘　　要：通过对 2 0 0 2年 5月东海赤潮原因种 -东海原甲藻和亚历山大藻的单一藻种和两种藻混合情况下对褶皱臂尾轮虫种群数量影响的实验研究 ,发现塔玛亚历山大藻 (ATHK )对轮虫有致死作用 ,其4 8hLC50 为 130 0cell·ml-1.藻的各组分毒性比较研究表明 ,只有藻液和藻细胞具有这种毒害作用 ,藻在早期生长阶段的毒害作用较强 ,毒性大小与藻细胞活性相关 .东海原甲藻在高密度 (4× 10 4、5× 10 4、10× 10 4cell·ml-1)时对轮虫种群数量在第 5d时开始有影响 ;东海原甲藻在低密度 (1× 10 4、2× 10 4、3× 10 4cell·ml-1)时 ,轮虫能够以其为食并进行生长繁殖 .两种藻混合情况下 ,东海原甲藻能够减轻塔玛亚历山大藻对轮虫的毒害作用 .实验结果表明 ,此次赤潮对东海的微型浮游动物种群能够产生一定的影响 .The effects of Prorocentrum donghaiense and Alexandrium sp., causative species of harmful algal bloom of East China Sea in May 2002, on rotifer Brachionus plicatilis population were studied in the laboratory. The results showed that Alexandrium tamarense(ATHK) had a lethal effect on B.plicatilis and the 48hLC 50 was about 1300 cell·ml -1. The toxin comparison of different fractions showed that the algal culture and re-suspended algal cells had the adverse effects, and the alga at earlier growth phases showed a stronger impact, indicating that the inhibitory effect was related with the activity of the living algal cells. P.donghaiense at high densities(4×10 4,5×10 4 and 10×10 4 cell·ml -1) had an adverse effect on B.plicatilis population, while at low densities(1×10 4,2×10 4 and 3×10 4 cell·ml -1), the alga could be used as food for rotifer population. When the two algae were mixed, the lethal effect of A.tamarense could be decreased by P.donghaiense.The results indicated that the above HAB event could affect the micro-zooplankton population in the occurrence area of East China Sea.

关 键 词：塔玛亚历山大藻 东海原甲藻 褶皱臂尾轮虫 

分 类 号：X171.5[环境科学与工程—环境科学]