Tuesday, July 30, 2019

Global Warming Is Pushing Pacific Salmon to the Brink, Federal Scientists Warn

The fish, critical to local economies and the food chain, were already under pressure from human infrastructure like dams.  Climate change is turning up the heat.

Sockeye salmon that swim the long journey up the Columbia River and into the Snake River in Idaho to spawn are among those most at risk. (Credit: Mark Conlin/VW PICS/UIG via Getty Images) Click to Enlarge.
Pacific salmon that spawn in Western streams and rivers have been struggling for decades to survive water diversions, dams and logging.  Now, global warming is pushing four important populations in California, Oregon, and Idaho toward extinction, federal scientists warn in a new study.

The new research shows that several of the region's salmon populations are now bumping into temperature limits, with those that spawn far inland after lengthy summer stream migrations and those that spend a lot of time in coastal habitats like river estuaries among the most at risk.

That includes Chinook salmon in California's Central Valley and in the Columbia and Willamette River basins in Oregon; coho salmon in parts of Northern California and Oregon; and sockeye salmon that reach the Snake River Basin in Idaho, all of which are already on the federal endangered species list.

Read more at Global Warming Is Pushing Pacific Salmon to the Brink, Federal Scientists Warn

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