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首页> 外文期刊>Environmental toxicology and chemistry >EARTHWORM DISPERSAL ASSAY FOR RAPIDLY EVALUATING SOIL QUALITY
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EARTHWORM DISPERSAL ASSAY FOR RAPIDLY EVALUATING SOIL QUALITY

机译：土方快速评估土壤质量的分散评估

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摘要

Earthworms enhance soil functioning and are therefore key species in the soil. Their presence is generally a positive sign for a terrestrial ecosystem, because these species serve as important biomarkers in soil quality evaluations. We describe a novel bioassay, the "dispersal assay," that is a simple and rapid technique for field-based soil quality evaluations. It is based on the premise that earthworms prefer optimal soils if given the choice. Thus, assay tubes containing a reference soil were inserted in target sites, and earthworms were placed into these tubes. According to their soil preference, the earthworms dispersed into the surrounding soil, remained in the initial soil within the tubes, avoided both by crawling up the tube, or died. Furthermore, sensitivity responses to metal concentrations, electrical conductivity, and soil pH were observed in field tests. Although the dispersal assay did not completely match traditional toxicity endpoints such as earthworm survival, we found that it can serve as an in situ screening test for assessing soil quality. Overall, our dispersal assay was relatively rapid (within 24 h), had low levels of variation, and showed high correlations between earthworm behavior and soil physicochemical properties. (C) 2017 SETAC
机译：enhance增强土壤功能，因此是土壤中的关键物种。它们的存在通常对陆地生态系统是一个积极的信号，因为这些物种在土壤质量评估中是重要的生物标记。我们描述了一种新颖的生物测定法，即“分散测定法”，它是一种基于田间土壤质量评估的简单而快速的技术。它基于这样的前提：如果选择的话，prefer更喜欢最佳土壤。因此，将含有参考土壤的测定管插入靶位，并将worm放入这些管中。根据它们对土壤的偏好，dispersed会散布到周围的土壤中，保留在试管内的初始土壤中，避免通过爬到试管上而死亡或死亡。此外，在现场测试中观察到了对金属浓度，电导率和土壤pH的敏感度响应。尽管分散测定不能完全符合传统的毒性终点指标，例如survival的存活率，但我们发现它可以作为评估土壤质量的现场筛选试验。总体而言，我们的分散测定相对较快（24小时内），变异程度较低，并显示了behavior行为与土壤理化性质之间的高度相关性。 （C）2017年SETAC

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