Showing posts with the label glaciers

Melting glaciers could create new habitats for Pacific salmon

Nature Communications US Fish & Wildlife Service` Melting glaciers in western North America could create new habitats for Pacific salmon over the next century, a modelling study in Nature Communications suggests.  Migratory Pacific salmon are one group of species whose abundances have dramatically shifted in response to changing climate patterns, however, the warming of Arctic and subarctic streams, in combination with glacier retreat, could create potential new habitats for salmon. Previous work has observed the colonization of newly de-glaciated streams by salmon, but predicting future shifts in salmon habitat across regions has been difficult.  Kara Pitman and colleagues modelled glacier retreat under different climate change scenarios for a 623,000 km2 region of western North America. They quantified emerging streams created by glacier retreat, which they combined with stream gradient-based salmon habitat models.  By 2100, the authors project that approximately 6,000 km of new