溴敌隆对蚯蚓赤子爱胜蚓的毒性及生物累积
Toxicity and bioaccumulation of bromadiolone to earthworm Eisenia fetida.
作者信息
Liu Jing, Xiong Kang, Ye Xiaoqing, Zhang Jianyun, Yang Ye, Ji Li
机构信息
MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Institute of Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Research Center for Air Pollution and Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Institute of Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
出版信息
Chemosphere. 2015 Sep;135:250-6. doi: 10.1016/j.chemosphere.2015.04.058. Epub 2015 May 15.
Bromadiolone, a potent second-generation anticoagulant rodenticide, has been extensively used worldwide for the field control of rodents. Invertebrates may be at risk from primary poisoning as a result of bromadiolone bait applications. However, there are few data regarding the toxicity and bioaccumulation of bromadiolone to earthworms. In this study, we reported that bromadiolone was toxic to earthworms at 1mg/kg soil, which is a likely concentration in the field following application of bromadiolone baits. Exposure to bromadiolone resulted in a significant inhibition of earthworm growth. The antioxidant activities of superoxide dismutase and catalase were slightly increased in earthworms, while malondialdehyde content (as a molecular marker indicative of the damage to lipid peroxidation) was dominantly elevated over the duration of exposure. Bromadiolone in soil is bioaccumulative to earthworms. The biota to soil accumulation factors (BSAFs) of bromadiolone were concentration dependent and BSAFs decreased as the level of bromadiolone in soil increased. These results suggest earthworms are not only the potential subject to primary poisoning but also the source of secondary exposure for insectivores and scavengers following application of bromadiolone.
溴敌隆是一种强效的第二代抗凝血灭鼠剂，已在全球广泛用于田间灭鼠。由于使用溴敌隆诱饵，无脊椎动物可能面临原发性中毒风险。然而，关于溴敌隆对蚯蚓的毒性和生物累积性的数据很少。在本研究中，我们报告称，溴敌隆在土壤中浓度为1mg/kg时对蚯蚓有毒，这是施用溴敌隆诱饵后田间可能出现的浓度。接触溴敌隆会导致蚯蚓生长受到显著抑制。蚯蚓体内超氧化物歧化酶和过氧化氢酶的抗氧化活性略有增加，而丙二醛含量（作为指示脂质过氧化损伤的分子标志物）在接触期间主要升高。土壤中的溴敌隆对蚯蚓具有生物累积性。溴敌隆的生物群与土壤累积因子（BSAFs）取决于浓度，且随着土壤中溴敌隆水平的升高，BSAFs降低。这些结果表明，蚯蚓不仅有可能遭受原发性中毒，而且在施用溴敌隆后还可能成为食虫动物和食腐动物二次接触的来源。
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