INP-ENSAT, Université de Toulouse, Av. Agrobiopôle, PO Box 107, Auzeville-Tolosane, 31326 Castanet-Tolosan, France.
Environ Pollut. 2013 Aug;179:232-41. doi: 10.1016/j.envpol.2013.03.066. Epub 2013 May 18.
Due to diffuse atmospheric fallouts of process particles enriched by metals and metalloids, polluted soils concern large areas at the global scale. Useful tools to assess ecotoxicity induced by these polluted soils are therefore needed. Earthworms are currently used as biotest, however the influence of specie and earthworm behaviour, soil characteristics are poorly highlighted. Our aim was therefore to assess the toxicity of various polluted soils with process particles enriches by metals and metalloids (Pb, Cd, Cu, Zn, As and Sb) collected from a lead recycling facility on two earthworm species belonging to different ecological types and thus likely to have contrasted behavioural responses (Eiseina hortensis and Lumbricus terrestris). The combination of behavioural factors measurements (cast production and biomass) and physico-chemical parameters such as metal absorption, bioaccumulation by earthworms and their localization in invertebrate tissues provided a valuable indication of pollutant bioavailability and ecotoxicity. Soil characteristics influenced ecotoxicity and metal uptake by earthworms, as well as their soil bioturbation.
由于受金属和类金属元素富集过程颗粒的弥漫性大气沉降影响，受污染土壤在全球范围内大面积存在。因此，需要有用的工具来评估这些受污染土壤引起的生态毒性。目前，蚯蚓被用作生物测试，但物种和蚯蚓行为、土壤特性的影响却没有得到充分的强调。因此，我们的目的是使用两种不同生态类型的蚯蚓（即属于食碎屑生态类群的赤子爱胜蚓和属于食腐生态类群的环毛蚓）来评估来自铅回收设施的受金属和类金属元素（Pb、Cd、Cu、Zn、As 和 Sb）富集的过程颗粒污染土壤的毒性。行为因素测量（排粪量和生物量）与金属吸收、蚯蚓体内生物累积及其在无脊椎动物组织中的定位等理化参数的结合，为污染物生物有效性和生态毒性提供了有价值的指示。土壤特性影响了蚯蚓的生态毒性和金属摄取，以及它们的土壤生物搅动。
