Chainho P, Chaves M L, Costa J L, Costa M J, Dauer D M
Faculdade de Ciências da Universidade de Lisboa, Instituto de Oceanografia, Campo Grande, 1749-016 Lisboa, Portugal.
Mar Pollut Bull. 2008 Jun;56(6):1128-37. doi: 10.1016/j.marpolbul.2008.03.018. Epub 2008 Apr 28.
The assessment of estuaries based on benthic communities is widely used to determine impacts caused by human pressure and is one of the required tools for the implementation of the European Water Framework Directive (WFD). Our study compared multimetric approaches (B-IBI and TICOR) to assess the benthic condition of three Portuguese estuaries (Mondego, Tejo, and Mira rivers) with different levels of natural and human induced stress. Benthic community condition was classified into quality status categories of the WFD and compared for consistency with a priori status categories based upon physical-chemical criteria. Both multimetric indices discriminated equally well between locations classified above or below the good status category but were unable to provide good separation between other quality classes (high/good, moderate, poor/bad). Metrics included in these indices are greatly affected by natural stress and we recommend the development of habitat-specific thresholds to increase the discriminatory ability of any benthic condition index.
基于底栖生物群落对河口进行评估，广泛用于确定人类压力造成的影响，是实施欧洲水框架指令（WFD）所需的工具之一。我们的研究比较了多指标方法（B-IBI和TICOR），以评估葡萄牙三个河口（蒙德古河、特茹河和米拉河）的底栖生物状况，这些河口受到不同程度的自然和人为压力。将底栖生物群落状况分类为WFD的质量状况类别，并与基于物理化学标准的先验状况类别进行一致性比较。这两个多指标指数在高于或低于良好状况类别的地点之间的区分效果相同，但无法在其他质量类别（高/良好、中等、差/不良）之间实现良好的区分。这些指数中包含的指标受自然压力影响很大，我们建议制定特定栖息地的阈值，以提高任何底栖生物状况指数的区分能力。
