Climate-assisted persistence of tropical fish vagrants in temperate marine ecosystems

Joseph DiBattista, Laura Gajdzik, Thomas DeCarlo, Adam Koziol, Mahsa Mousavi-Derazmahalleh, Megan Coghlan, Matthew Power, Michael Bunce, David Fairclough, Michael Travers & Glenn Moore
Rising temperatures and extreme climatic events are propelling tropical species into temperate marine ecosystems, but not all species can persist. Here, we used the heatwave-driven expatriation of tropical black rabbitfish (Siganus fuscescens) to the temperate environments of Western Australia to assess the ecological and evolutionary mechanisms that may entail their persistence. Population genomic assays for this rabbitfish indicated little genetic differentiation between tropical residents and vagrants to temperate environments due to high migration rates, which...
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