… If a potential super El Niño materializes later this year, as forecasters expect with 82% probability by July, the combined warming could disrupt ecosystems, harm marine life and threaten the juvenile salmon that are heading out to sea for the first time since populations began to recover. The concern is specific and urgent. Young salmon that hatch in rivers like the Sacramento, Klamath and Eel spend their first months in the ocean, where they depend on cold, nutrient-rich upwelling water to find food and survive. When ocean temperatures rise, that food web breaks down. The prey species that juvenile salmon depend on shift northward or decline, and survival rates drop.

Other salmon news:

• KOBI (Medford, Ore.): Warming Klamath river spikes parasites, threatening salmon
• Magic Canoe: Blog: How to build a salmon superhighway
• Active NorCal (Redding, Calif.): Newsom and Trump just agreed on something: building the Delta tunnel. Fishing groups are furious.