Department of Palaeontology, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria.
Department of Palaeontology, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria.
Mar Pollut Bull. 2021 Oct;171:112703. doi: 10.1016/j.marpolbul.2021.112703. Epub 2021 Jul 27.
The Eastern Mediterranean Sea hosts more non-indigenous species than any other marine region, yet their impacts on the native biota remain poorly understood. Focusing on mollusks from the Israeli rocky intertidal, we explored the hypothesis that this abiotically harsh habitat supports a limited trait diversity, and thus may promote niche overlap and competition between native and non-indigenous species. Indeed, native and non-indigenous assemblage components often had a highly similar trait composition, caused by functionally similar native (Patella caerulea) and non-indigenous (Cellana rota) limpets. Body size of P. caerulea decreased with increasing C. rota prevalence, but not vice versa, indicating potential asymmetric competition. Although both species have coexisted in Israel for >15 years, a rapid 'replacement' of native limpets by C. rota has been reported for a thermally polluted site, suggesting that competition and regionally rapid climate-related seawater warming might interact to progressively erode native limpet performance along the Israeli coast.
东地中海拥有比其他任何海洋区域都多的非本地物种，但人们对这些物种对本地生物群的影响仍知之甚少。本研究聚焦于以色列多岩石潮间带的软体动物，我们探究了这样一个假设，即在这种非生物条件恶劣的生境中，支持有限的特征多样性，从而可能促进本地和非本地物种之间的生态位重叠和竞争。事实上，本地和非本地组合成分的特征组成往往非常相似，这是由功能相似的本地（Patella caerulea）和非本地（Cellana rota）帽贝造成的。P. caerulea 的体型随着 C. rota 流行程度的增加而减小，但反之则不然，表明可能存在不对称竞争。尽管这两个物种在以色列共存了>15 年，但据报道，在一个受热污染的地点，本地帽贝已被 C. rota 迅速“取代”，这表明竞争和区域内与气候相关的海水变暖可能相互作用，逐渐侵蚀以色列沿海地区本地帽贝的性能。
