De Lange Hendrika J, Sperber Veerle, Peeters Edwin T H M
Aquatic Ecology and Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 8080, 6700 DD Wageningen, The Netherlands.
Environ Toxicol Chem. 2006 Feb;25(2):452-7. doi: 10.1897/05-413.1.
Contamination of sediments is a serious problem in most industrialized areas. Sediments are often contaminated with trace metals and organic contaminants like polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). Bioassays are often used to determine the effect of contaminants on biota. However, survival or growth may not be the most sensitive endpoints. Behavioral changes often occur at much lower concentrations. Our study aimed to assess the effect of PAHs on habitat choice of two common freshwater invertebrates, the amphipod Gammarus pulex and the isopod Asellus aquaticus. We spiked clean field sediment with a mixture of four PAHs, fluoranthene, pyrene, chrysene, and benzo[k]fluoranthene, to a total concentration of 30 mg PAH/kg dry weight. Both species were offered a choice between PAH-spiked sediments and clean sediments in laboratory experiments. Results show that both species avoid PAH-spiked sediment. Origin of the population, either from a clean reference site or from a polluted site, did not affect habitat choice of either species.
在大多数工业化地区，沉积物污染是一个严重问题。沉积物常常受到痕量金属以及多环芳烃（PAHs）和多氯联苯（PCBs）等有机污染物的污染。生物测定法常用于确定污染物对生物群的影响。然而，生存或生长可能并非最敏感的终点指标。行为变化往往在低得多的浓度下就会出现。我们的研究旨在评估多环芳烃对两种常见淡水无脊椎动物——双甲藻钩虾（Gammarus pulex）和普通等足虫（Asellus aquaticus）栖息地选择的影响。我们用荧蒽、芘、 Chrysene和苯并[k]荧蒽这四种多环芳烃的混合物对清洁的野外沉积物进行加标，使其总浓度达到30毫克多环芳烃/千克干重。在实验室实验中，为这两个物种提供了在添加多环芳烃的沉积物和清洁沉积物之间进行选择的机会。结果表明，这两个物种都会避开添加多环芳烃的沉积物。种群的来源，无论是来自清洁的参照地点还是受污染的地点，均不影响这两个物种的栖息地选择。
