Franco Anita, Torricelli Patrizia, Franzoi Piero
Dep. Environmental Sciences, University of Venice, Castello 2737/b, 30122 Venice, Italy.
Mar Pollut Bull. 2009 Nov;58(11):1704-17. doi: 10.1016/j.marpolbul.2009.06.016. Epub 2009 Jul 25.
A habitat approach was promoted in the framework of ecological status assessment of transitional waters, assuming the importance of habitat heterogeneity to the overall system status. The approach was applied to the use of fish-based multimetric indices by adapting them to seagrass and marsh habitats in the Venice lagoon, Italy, through selection of appropriate metrics and reference conditions. While for marsh habitats, no clear patterns resulted, the index response for seagrass was consistent with the habitat degradation and loss recorded in the lagoon between 2002 and 2005 and with the higher habitat disturbance in southern and central lagoon sub-basins. The assessment of individual habitats is presented as a first step in the process of evaluating the overall condition of a Mediterranean lagoon environment, which should also take account of the diversity of habitats and their availability within the system to properly define an overall index of ecological status.
在过渡水域生态状况评估框架内推广了一种栖息地方法，该方法假定栖息地异质性对整个系统状况具有重要意义。通过选择合适的指标和参考条件，将该方法应用于基于鱼类的多指标指数，使其适用于意大利威尼斯泻湖的海草和沼泽栖息地。虽然对于沼泽栖息地没有得出明确的模式，但海草的指数响应与2002年至2005年期间泻湖记录的栖息地退化和丧失情况一致，也与泻湖南部和中部子流域较高的栖息地干扰情况一致。对各个栖息地的评估是评估地中海泻湖环境整体状况过程的第一步，该过程还应考虑栖息地的多样性及其在系统中的可利用性，以正确定义生态状况的整体指数。
