Puget Sound salmon face more ups and downs in river flows – Phys.org


Good news and concerning news from some recent science.

Many salmon rivers around Puget Sound have experienced increasing fluctuations in flow over the past 60 years, just as climate change projections predict – and that’s unfortunate news for threatened Chinook salmon, according to a new analysis of salmon survival and river flow. More pronounced fluctuations in flow can scour away salmon eggs and exhaust young fish, especially when lower flows force adult fish to lay eggs in more exposed areas in the center of the channel. The new study published in the peer-reviewed journal Global Change Biology says such increased flow variability has the most negative effect on salmon populations of several climate factors considered. (Phys.org)

http://phys.org/news/2015-02-puget-salmon-ups-downs-river.html

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