Fleischer Dirk, Zettler Michael L
Institute for Polar Ecology of the University of Kiel, Wischhofstr. 1-3, Geb. 12, 24148 Kiel, Schleswig-Holstein, Germany.
Mar Pollut Bull. 2009 Aug;58(3):351-7. doi: 10.1016/j.marpolbul.2008.10.016. Epub 2008 Dec 12.
In the last decade a politically inspired marine protection movement arose in the European Union. This movement leads to an holistic strategy. Merging the Water Framework Directive (WFD) and the Marine Strategy Directive (MSD) along the European coastline demands sophisticated ecological classification procedures. The 'Benthic Quality Index' (BQI) is one of several indices created in view of the WFD. We used the dynamic species reference system ES(50)(0.05) to test the capability of BQI to exclude primary environmental factors including the salinity gradient and depth (a proxy for the oxygen regime) from the ecological quality (EcoQ) assessment. A macrozoobenthos dataset of the southern Baltic Sea spreading over more than 20 years and over 100,000 km2 was used for the EcoQ assessment. Quality assurance rules were applied to the record set and an analytical dataset of 936 sampling events with 20,451 abundance records was used in the analysis. We show that the natural salinity gradient has a severe impact on the BQI based EcoQ. We adapted the calculation procedure to reduce the salinity effects to a minimum. According to the adaptation 503 sensitivity/tolerance values for 87 species were computed. These values were calculated within seven salinity ranges from 0 to >30 PSU and two depth zones. These values can be used as a reference for further investigation in the Baltic and other areas with similar environmental conditions.
在过去十年中，欧盟兴起了一场受政治启发的海洋保护运动。这场运动催生了一项整体战略。整合欧洲海岸线沿线的《水框架指令》（WFD）和《海洋战略指令》（MSD）需要复杂的生态分类程序。“底栖生物质量指数”（BQI）是鉴于《水框架指令》而创建的多个指数之一。我们使用动态物种参考系统ES(50)(0.05)来测试BQI在生态质量（EcoQ）评估中排除包括盐度梯度和深度（作为氧状况的替代指标）在内的主要环境因素的能力。一个覆盖波罗的海南部超过20年且面积超过100,000平方公里的大型底栖动物数据集被用于EcoQ评估。质量保证规则应用于记录集，分析中使用了一个包含936个采样事件和20,451条丰度记录的分析数据集。我们表明，自然盐度梯度对基于BQI的EcoQ有严重影响。我们调整了计算程序，以将盐度影响降至最低。根据调整结果，计算了87个物种的503个敏感性/耐受性值。这些值是在从0到>30 PSU的七个盐度范围和两个深度区域内计算得出的。这些值可作为在波罗的海及其他环境条件相似地区进行进一步研究的参考。
