CESAM-Centre for Environmental and Marine Studies & Department of Biology, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
Ecotoxicol Environ Saf. 2008 Nov;71(3):661-70. doi: 10.1016/j.ecoenv.2008.02.004. Epub 2008 Mar 20.
A chemical characterization of the soil compartment per se does not supply any information about the synergistic/antagonistic effects of mixtures of chemicals, resulting in an under- or overestimation of the risks. Therefore the existence of rapid and ecologically relevant toxicity assays becomes of paramount importance, allowing the evaluation of invertebrate's behavioural parameters with equal consequences in terms of functionality of the edaphic community. The aim of this study was to evaluate the sensitivity of avoidance assays, with the earthworm Eisenia andrei, in discriminating natural soils under different anthropogenic disturbances. Although earthworms were able to discriminate soils with similar contamination, it is nonetheless questionable whether the preference for some soils is determined by the reduced bioavailability of contaminants, the great affinity of the species for organic matter-rich soils, or the inability of chemoreceptors to detect some contaminants from complex environmental mixtures, usually present in natural contaminated soils.
对土壤成分进行化学特征描述本身并不能提供关于化学物质混合物协同/拮抗作用的信息，从而导致对风险的低估或高估。因此，快速和具有生态相关性的毒性检测方法的存在变得至关重要，这使得可以评估无脊椎动物的行为参数，而这些参数在土壤群落的功能方面具有同等的后果。本研究的目的是评估避免试验的敏感性，用赤子爱胜蚓来区分不同人为干扰下的自然土壤。尽管蚯蚓能够区分具有相似污染的土壤，但仍有疑问的是，对某些土壤的偏好是否是由污染物的生物利用度降低、该物种对富含有机物的土壤的巨大亲和力，还是化学感受器无法检测到复杂环境混合物中的某些污染物所决定的，这些污染物通常存在于自然污染土壤中。
