摘要:
1984年至1986年间武汉东湖(包括湖边池塘)的水华有7种,即铜绿微囊藻、大型铜绿微囊藻、边缘微囊藻、水华鱼腥藻、卷曲鱼腥藻、美丽颤藻和束丝藻.经生物测定,除束丝藻未测、卷曲鱼腥藻和美丽颤藻未测出毒性外,其余4种皆为有毒水华.东湖的水华随着季节变化而有不同类型的更迭,其出现格局为:卷曲鱼腥藻、微囊藻、颤藻、微囊藻.微囊藻水华的毒性在不同季节也有较大差异,毒性最低在8—9月份,最高在12月份(LD50=24mg/kg鼠重),随着温度的降低而提高.讨论了某些环境参数与微囊藻水华形成及其毒性变化的关系.此外,还用脑内注射和腹腔注射方法,研究了微囊藻毒素的毒性表现.
Abstract:
The blue-green algal blooms in Donghu Lake are formed by seven species: Microcystis aeruginosa, Microcystis aeruginosa var. major, Microcystis marginata, Anabaena circinalis, Anabaena flos-aquae, Oscillatoria formosa and Aphanizomenon sp. Through bioassay, we found that blooms of M. aeruginosa, M. aeruginosa var. major, M. marginata and A. flos-aquae are toxic, while those of A. circinalis and O. formosa are non-toxic. The toxicity and pigments of the water-bloom varied with seasons. From August to September, the Microcystis bloom showed the lowest toxicity, while the highest toxicity was detected in December(LD50 24.4mg/kg mouse wt.). Studies of the pharmacological characteristics of the toxin and the comparison of the clinical symptoms induced by these toxins through different routes(intracerebral and intraperitoneal)have also been made.
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