生物链调控技术防治湖泊富营养化研究进展

我国湖泊富营养化已呈现出日益严重的趋势。综述了湖泊富营养化治理中的生物链调控技术的研究进展,阐述了削盐、控藻和碎屑生物链的作用,认为复合生物链的构建将对湖泊水质修复起到重要的作用。     

3种虾类超氧化物歧化酶同工酶比较(英文)

[Objective] The aim of the study is to compare the activities of superoxide dismutase(SOD) isoenzymes in three species of shrimps Penaeus japonicus, Procambarus clarkia and Litopenaeus vannamei. [Method] The experimental materials were used to measure SOD activities after pretreatment, meanwhile the differences in SOD isoenzymes from different materials were assayed by polyacrylamide gel electrophoresis (PAGE). [Result] There are specific and histological differences in SOD activities of shrimps. With a similar electrophoresis pattern and migration rate, Penaeus japonicus and Litopenaeus vannamei showed remarkable differences with that of Procambarus clarkia. [Conclusion] The result showed the differences of cognation and origin of three shrimps.     

白洋淀浮游甲壳动物的生物多样性研究

基于2006年4月至2006年12月对白洋淀浮游甲壳动物进行采样调查，分析了白洋淀浮游甲壳动物的群落结构及多样性。本次调查共记录到浮游甲壳动物34种，隶属于9科19属，其中枝角类（Cladocera）19种，桡足类（Copepoda）16种。物种多样性季节性明显：枝角类优势种在春、夏和秋冬季依次为微型裸腹溞（Moina micrura）、长额象鼻溞（Bosmina longirostris）、长肢秀体溞（Diaphanosoma leuch）；而桡足类优势种在冬春季为英勇剑水蚤（Cyclopidae strenuus），在夏秋季为锯缘真剑水蚤（Eucyclopinae macruroides）和台湾温剑水蚤（Thermocyclops tsihokurnsis）。物种多样性春秋季较高，夏季和冬季较低。浮游甲壳类个体密度以春季最高，冬季最低。根据生物多样性指数综合判定白洋淀的水质为中营养化水平。