太湖湿地生态系统有机氯污染的夜鹭生物指示

1999年春季，在对无锡鼋头渚鹭鸟种群野外生态调查的基础上，对夜鹭幼鸟反吐物，觅食地底泥和水体进行了采样，并在实验室用气相色谱测定了样品中的α-HCH、β-HCH、γ-HCH、艾氏剂、狄氏剂、异狄氏剂、七氯、环氧七氯、p,p'-DDE、p,p'-DDD、o,p'-DDT和p,p'-DDT等有机氯农药的残留状况，结果表明，在有机氯农药禁用近20年后，六六六的异构体和滴滴涕及其衍生物均能在环境中和夜鹭食物中有不明，在有机氯农药禁用近20年后，六六六的异构体和滴滴涕及其衍生物均能在环境中和夜鹭食物中有不明，在有机氯农药禁用近20年后，六六六的异构体和滴滴涕及其衍生物均能在环境中和夜鹭食物中有不检出，有机氯污染物沿夜鹭食物链产生逐级富集，太湖湿地生态系统中夜鹭卵富集了滴滴涕万倍以上，富集了六六六数千倍，从而使有机氯污染物易被检测，因此夜鹭锘放可作为湿地生态系统有机氯污染的生物指示物。

Boindication of organochlorine pesticides by night heron in Taihu wetland ecosystem.

Based on field ecological investigation on the colony of herons in Yuantouzhu of Taihu in 1999, the regurgitated foods by chicks of night heron were collected for prey type identification and chemical analysis. Besides, eggs of night heron, and sediments and waters in foraging habitats were sampled for chemical analysis as well. alpha-HCH, beta-HCH, gamma-HCH, Aldrin, Dieldrin, Endrin, Heptachlor, Heptachlor epoxide, p,p'-DDE, p,p'-DDD, o,p'-DDT and p,p'-DDT were determined in laboratory by gas chromatography. The results indicated that HCH isomers, DDT and its metabolites could be detected in various environments and preys of night heron, although the organochlorined chemicals were banned for almost 20 years. Moreover, The results showed that eggs of night heron could accumulate organochlorine pesticides by as much as a factor of 10(3)-10(4), which can make chemical analysis much easier. So they are good bio-indicators for organochlorine contamination level in wetland environments.