Long-term toxicity of five polycyclic aromatic hydrocarbons for the terrestrial isopods Oniscus asellus and Porcellio scaber
Long-term toxicity of five polycyclic aromatic hydrocarbons for the terrestrial isopods Oniscus asellus and Porcellio scaber
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DOI：
10.1002/etc.5620150728
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发表时间：
1996-07-01
影响因子：
4.1
通讯作者：
Verweij, RA
中科院分区：
文献类型：
--
作者：
vanBrummelen, TC;vanGestel, CAM;Verweij, RA
多环芳烃（PAHs）是土壤污染的常见成分，但其对土壤中生物的生态毒理学风险却知之甚少。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。等足类动物暴露于四种不同浓度的芴，菲，荧蒽（高达4 μ mol/g），苯并[a]蒽，或苯并[a]芘（高达1.25 μ mol/g）污染的食物。Porcellio scaber的暴露持续16周，在任何处理中均未观察到对存活、生长或总蛋白（仅测试的雌性）的不良影响。在暴露于0.125 μ mol苯并[n]蒽47周时，观察到一个小的但显着的减少Oniscus asellus的生长。g（-1）干重和1.25 μ mol芴g（-1）干重和更高浓度。这对O.在菲、荧蒽、苯并[a]蒽和苯并[a]芘的某些处理中观察到了雌虫;怀孕的雌虫比例较大，这导致每只雌虫的幼虫数量较高。暴露并没有显着影响育雏大小，体重的母亲释放后的少年，或饥饿后的少年的生存。雌性的总蛋白质含量在0.4 μ mol芴g（-1）干重和更高浓度下显着降低。等足类动物的生长和蛋白质含量很可能只在高污染场所受到多环芳烃暴露的影响。刺激繁殖和可能的DNA损伤的生态后果知之甚少，需要进一步关注，因为土壤无脊椎动物可能会暴露于多环芳烃许多代。
Polycyclic aromatic hydrocarbons (PAHs) are a common component of soil pollution, yet little is known of the ecotoxicological 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 mu mol/g), benz[a]anthracene, or benzo[a]pyrene (up to 1.25 mu mol/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 mu mol benz[n]anthracene . g(-1) dry weight and 1.25 mu mol 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 mu mol 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.