While warming temperatures are expected to facilitate the poleward movement of species previously restricted to more equatorial waters, the arrival and persistence of cold‐water species in more equatorward waters are relatively unprecedented. The native north‐east Pacific ascidian Corella inflata Huntsman, 1912, has spread southward and invaded new regions along the North American Pacific coast, a rare example of a marine species moving towards the equator. Here, we document C. inflata's equatorward movement and potential impact, assess several hypotheses for its spread and consider implications for invasion ecology.

中文翻译：

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下楼梯：冷水海峡赤道前进，对入侵生态学有更广泛的意义

预计变暖将促进以前局限于赤道水域的物种的极向运动，而冷水物种在赤道水域的到达和持续存在则相对空前。天然东北太平洋海鞘科雷拉胀亨斯迈，1912年，已蔓延和向南沿入侵北美太平洋沿岸新地区，一个海洋物种向赤道移动的一个罕见的例子。在这里，我们记录了C. inflata的赤道运动和潜在影响，评估了其传播的几种假设，并考虑了对入侵生态学的影响。