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首页> 外文期刊>Environmental toxicology and chemistry >LONG-TERM TOXICITY OF FIVE POLYCYCLIC AROMATIC HYDROCARBONS FOR THE TERRESTRIAL ISOPODS ONISCUS ASELLUS AND PORCELLIO SCABER
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LONG-TERM TOXICITY OF FIVE POLYCYCLIC AROMATIC HYDROCARBONS FOR THE TERRESTRIAL ISOPODS ONISCUS ASELLUS AND PORCELLIO SCABER

机译：五种多环芳烃对陆生异形ON，ON虫和虫的长期毒性

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Polycyclic aromatic hydrocarbons (PAHs) are a common component of soil pollution, yet little is known of the ecotoxi-cological risks these compounds may pose to life in soil. This article reports the ecotoxicity of five PAHs for two terrestrial isopod species. Isopods were exposed to food contaminated with four different concentrations of either fluorene, phenanthrene, fluoranthene (up to 4 μmol/g), benz[a]anthracene, or benzo[a]pyrene (up to 1.25 μmol/g). Exposure of Porcellio scaber lasted 16 weeks, and no adverse effects on survival, growth, or total protein (only females tested) were observed in any of the treatments. A small but significant reduction in growth of Oniscus asellus was observed at 47 weeks of exposure to 0.125 μmol benz[a]anthracene·g~(-1) dry weight and 1.25 μmol fluorene·g~(-1) dry weight and higher concentrations. A significant stimulation of the reproduction of O. asellus was observed in some of the phenanthrene, fluoranthene, benz[a]anthracene, and benzo[a]pyrene treatments; a larger proportion of the females were gravid, which resulted in a higher number of juveniles per female. Exposure did not significantly affect brood size, weight of the mother after release of the juveniles, or the survival of the juveniles upon starvation. Total protein content of females was significantly reduced at 0.4 μmol fluorene g~(-1) dry weight and higher concentrations. Growth and protein content of isopods is likely to be affected by PAH exposure only at highly contaminated sites. The ecological consequences of stimulated reproduction and possible DNA damage are poorly understood and require further attention because soil invertebrates may be exposed to PAHs over many generations.
机译：多环芳烃（PAHs）是土壤污染的常见组成部分，但对于这些化合物可能对土壤生命造成的生态毒理学风险知之甚少。本文报道了五种多环芳烃对两种陆生等足类动物的生态毒性。将等足动物暴露于受四种不同浓度的芴，菲，荧蒽（最高4μmol/ g），苯并[a]蒽或苯并[a] py（最高1.25μmol/ g）污染的食物中。 Porcellio scaber暴露持续16周，在任何治疗中均未观察到对存活，生长或总蛋白的不利影响（仅测试雌性）。在暴露于0.125μmol苯并[a]蒽·g〜（-1）干重和1.25μmol芴·g〜（-1）干重及更高浓度的47周下，观察到Oniscus asellus的生长有少量但显着的减少。 。在一些菲，荧蒽，苯并[a]蒽和苯并[a] py处理中，观察到了强烈刺激的米色曲霉繁殖。较大比例的雌性妊娠，导致每个雌性的幼鱼数量增加。暴露并没有显着影响幼体的大小，幼体释放后母亲的体重或饥饿后幼体的存活。在干重为0.4μmol芴g〜（-1）和更高浓度的情况下，雌性的总蛋白质含量显着降低。仅在高度污染的场所，PAH暴露可能会影响等足动物的生长和蛋白质含量。人们对刺激繁殖和可能的DNA破坏的生态后果了解得很少，并且需要进一步关注，因为无脊椎动物可能会经历多代的PAHs暴露。

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