Laboratorio di Ecologia Marina, IAMC-CNR, Castellammare del Golfo, 91014 Trapani, Italy.
Mar Pollut Bull. 2011 Mar;62(3):483-9. doi: 10.1016/j.marpolbul.2010.12.011. Epub 2011 Jan 21.
Posidonia oceanica meadows can be severely damaged by dredge-fill operations. We report on the construction of gas pipelines that occurred between 1981 and 1993 in SW Sicily, Italy. A large portion of the meadow was mechanically removed, and the excavated trench was filled with a mosaic of substrates, ranging from sand to consolidated rock debris. Meadow loss and recovery were quantified over 7 years after the end of operations. We recorded an overall loss of 81.20 ha of meadow. Substrate strongly affected recovery as the percent cover by P. oceanica consistently increased on calcareous rubble, reaching values of 44.37 ± 3.05% in shallow sites after 7 years, whereas no significant increase occurred on other substrates. As in the Mediterranean Sea exploitation of coastal areas continues to grow with consequent impacts on P. oceanica meadows, this case study illustrates how artificial rubble-like materials could be employed to support the restoration of damaged meadows.
波西多尼亚海草场可能会被疏浚填海作业严重破坏。我们报告了意大利西西里西南部 1981 年至 1993 年期间发生的天然气管道建设情况。大量的海草场被机械移除，挖掘的沟渠用沙到固结岩屑等多种基质进行了填充。在作业结束 7 年后，对海草场的损失和恢复情况进行了量化。我们记录到海草场整体损失了 81.20 公顷。基质强烈影响了恢复情况，因为在钙质碎石上，巨藻的覆盖率持续增加，7 年后浅水区的覆盖率达到 44.37±3.05%，而在其他基质上则没有显著增加。由于在地中海地区，沿海地区的开发不断增加，对波西多尼亚海草场造成了相应的影响，本案例研究说明了人工碎石状材料如何可以用于支持受损海草场的恢复。
