Genomic evidence of past and future climate-linked loss in a migratory Arctic fish

Kara K. S. Layton, Paul V. R. Snelgrove, J. Brian Dempson, Tony Kess, Sarah J. Lehnert, Paul Bentzen, Steven J. Duffy, Amber M. Messmer, Ryan R. E. Stanley, Claudio DiBacco, Sarah J. Salisbury, Daniel E. Ruzzante, Cameron M. Nugent, Moira M. Ferguson, Jong S. Leong, Ben F. Koop & Ian R. Bradbury
Despite widespread biodiversity losses, an understanding of how most taxa will respond to future climate change is lacking. Here we integrate genomics and environmental modelling to assess climate change responses in an ecologically and economically important Arctic species. Environmentally associated genomic diversity and machine learning are used to identify highly vulnerable populations of anadromous (migratory) Arctic charr, and we reconstruct estimates of effective population size spanning the twentieth century to identify past climate-associated declines. We...
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