2种海水轮虫对UV-B辐射敏感性的比较  

Comparison between two species of marine rotifers for the sensitivity to UV-B radiation

作　　者：冯蕾[1] 肖慧[1] 王仁君[1] 唐学玺[1] 李永祺[1] 

机构地区：[1]中国海洋大学海洋生命学院

出　　处：《海洋环境科学》2006年第3期25-28,共4页Marine Environmental Science

基　　金：国家自然科学基金资助项目(39870146;40506028);山东省优秀中青年科学家科研奖励基金项目(03BS120);中国博士后科学基金项目(2005037237)

摘　　要：运用生态毒理学方法研究了褶皱臂尾轮虫(Brachionus plicatilis)和壶状臂尾轮虫(B.urceolaris)对UV-B辐射的敏感性。结果表明:UV-B辐射对轮虫有较大的伤害作用,且当辐射强度达一定阈值会对其产生急性致死作用。UV-B辐射对褶皱臂尾轮虫24、48和96 h的半致死剂量分别为4.393、2.694和1.720 kJ/m2,对壶状臂尾轮虫24、48和96 h的半致死剂量分别为5.856、4.516和1.730 kJ/m2;而UV-B辐射对2种轮虫的急性致死强度阈值均为(50±10)μW/cm2。由此可以看出,在实验所用的UV-B辐射强度剂量范围内,褶皱臂尾轮虫在UV-B辐射处理后的24和48 h对UV-B辐射的敏感性要大于壶状臂尾轮虫,而在处理后的96 h,2种轮虫对UV-B辐射的敏感性则无显著差别。This paper reported the sensitivity of two species of marine rotifers （ Brachionus plicatilis and B. urceolaris）to UV-B radiation. The result showed that the UV-B radiation was very harmful to rotifers and could make acute lethal effect on them when the UV-B radiation intensity achieved some threshold. Moreover, the 24h, 48h and 96h LD50 of UV-B radiation for Brachionus plicatilis were 4.393, 2. 694 and 1. 720 kJ/m^2 respectively while for Brachionus urceolaris were 5. 856, 4.516 and 1. 730 kJ/m^2 respectively. However, both of the two rotifer species have the same acute lethal intensity threshold of UV-B radiation of （50 ± 10） μW/cm^2. Furthermore, in the radiation dose of the experiment, the B. plicatilis was more sensitive to UV-B radiation than the B. urceolaris at 24h or 48h after UV-B radiation treatment, However, there was no significant difference in the sensitivity to UV-B radiation between these two rotifer species at 96h after treatment.

关 键 词：UV-B辐射 褶皱臂尾轮虫 壶状臂尾轮虫 敏感性 致死强度阈值 半致死剂量 

分 类 号：X171.5[环境科学与工程—环境科学]