A diverse and abundant fouling community dominated by Lessepsian non-indigenous species was identified on a 13.5-m-long steel buoy stranded on the Israeli coast but originating from Port Said, at the Mediterranean entrance of the Suez Canal, Egypt. The molluscan community was sampled quantitatively by scraping. Three quarters of the individuals and more than half of the species were non-indigenous. Among the latter, a mytilid bivalve, Gregariella cf. ehrenbergi, was first recorded in the Mediterranean Sea on the basis of these samples, suggesting that the full consideration of all potential vectors can contribute to non-indigenous species detection. Large floating objects in coastal waters, such as buoys, are particularly suitable for colonization by Lessepsian species because hard substrates, and artificial ones in particular, are highly susceptible to the establishment of non-indigenous species. Moreover, their size and persistence enable the development of abundant and mature fouling communities that can disseminate propagules as eggs and larvae over long distances and for extended periods if detached. This report highlights the potential for large rafting debris as a vector of the spread of non-indigenous biota within the Mediterranean Sea.

中文翻译：

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大型漂流物体传播莱塞普斯入侵者的潜力：分离浮标的情况。

在一个 13.5 米长的钢制浮标上发现了一个以莱塞普斯非土著物种为主的多样化和丰富的污染群落，该浮标搁浅在以色列海岸，但源自埃及苏伊士运河地中海入口处的塞得港。通过刮取对软体动物群落进行定量采样。四分之三的个体和超过一半的物种是非本土的。在后者中，一种mytilid bivalve，Gregariella cf。ehrenbergi 是根据这些样本首次在地中海记录的，这表明充分考虑所有潜在载体有助于非本土物种的检测。沿海水域中的大型漂浮物体，例如浮标，特别适合莱塞普斯物种的殖民，因为坚硬的基质，特别是人造的，非常容易受到非本土物种的影响。此外，它们的大小和持久性使丰富和成熟的污染群落得以发展，这些群落可以长距离传播繁殖体作为卵和幼虫，如果分离，则可以长时间传播。这份报告强调了大型漂流碎片作为地中海非本土生物群传播媒介的潜力。