根据预期的生物相似性,选择用于生态因果评估的比较地点
David J Gillett1, Raphael D Mazor1, Susan B Norton2
1Southern California Coastal Water Research Project, 3535 Harbor Blvd, Suite 110, Costa Mesa, CA 92626.
概括
本研究引入了一种定量方法,以快速识别类似的生态地点,以进行因果评估. 这种方法简化了识别导致河流健康不良的关键压力因素,有助于环境管理.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 评估水质水质的评估.
背景情况:
- 处于不良状态的生态场所需要因果评估才能有效管理.
- 目前的特定地点的因果评估往往需要大量的时间.
- 确定生态上相似的比较地点是一个关键但漫长的步骤.
研究的目的:
- 开发和描述一种定量方法,以加快用于因果评估的比较地点的识别.
- 为了简化比较生物条件和受影响地点的压力因素暴露的过程.
- 促进更快,更有效的环境管理决策.
主要方法:
- 利用预期的生物相似性,通过预测盆地宏无脊椎动物种群的Bray-Curtis不相似性 (BC) 来衡量,以选择比较地点.
- 使用预测生物指数生成了南加州15个示范场所的比较站点集.
- 使用已建立的因果评估证据类型评估了四个示例压力因素 (总,氨,特异导电,双).
主要成果:
- 大多数示范场所成功选择了100多个比较地点 (BC < 0.1).
- 提升的特定导电性被确定为最常见的生物条件差的可能原因.
- 在某些部位,总和双也被认为是潜在的压力因素.
结论:
- 开发的定量方法有效地加速了对因果评估的比较地点的选择.
- 这种方法可以适应各种生物评估计划,具有足够的数据和预测指数.
- 它为快速的查级压力因素评估提供了基础,以告知管理行动.
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