陆地食物网模型对土壤清理水平的评价

P. Doctor, K. A. Gano, N. K. Lane
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引用次数: 1

摘要

华盛顿州生态部(Ecology)正在修订《有毒物质控制模型法案》(MTCA: WAC 173-340-7490至7494),将陆地食物途径纳入生态风险评估,并设定清理水平。《生态学》提出的生态风险评估方法的关键条款之一是一个通用的简化“食物网”模型,该模型将用于设定清理水平。陆地模型基于四种食性行会,默认物种是蚯蚓、鼩鼱、田鼠和知更鸟。食物网模型的使用意味着结果应该在某种程度上描述被评估的生态系统。任何决策标准(例如,基准或清理水平)都应针对具体地点,并以该地点存在的物种为基础。默认物种不能代表汉福德遗址区原生灌木-草原生态系统的动物群。因此,使用现场不存在的物种来设定土壤净化水平似乎是有缺陷的。四个喂养行会的备选物种已经选定。根据文献建立了物种特定暴露参数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of a Terrestrial Foodweb Model to Set Soil Cleanup Levels
The Washington State Department of Ecology (Ecology) is revising the Model Toxics Control Act (MTCA: WAC 173-340-7490 to 7494) to include terrestrial food pathways in an ecological risk evaluation and to set cleanup levels. One of the key provisions of the ecological risk assessment approach proposed by Ecology is a generic simplified "foodweb" model that would be used to set cleanup levels. The terrestrial model is based on four feeding guilds and default species are the earthworm, shrew, vole, and robin. The use of a foodweb model implies that the results should in some way be descriptive of the ecosystem being evaluated. Any decision criterion (e.g., a benchmark or cleanup level) should be site-specific, and based on species present at the site. The default species are not representative of the fauna in the native shrub-steppe ecosystem of the Hanford Site. Therefore, the use of species not present at the site to set soil cleanup levels seems flawed. Alternative species for the four feeding guilds have been selected. Species specific exposure parameters were developed from the literature.
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