Warming West Coast Waters Are Losing Productivity, Says NOAA

It's no secret that climate change has been affecting our oceans, with things like warming surface temperatures and rising acidity affecting various species across the world. Now a new report has revealed that the West Coast of North America may be feeling changes so intense that it is altering the overall productivity of local waters, leading to a reduction in marine species spanning from seabirds to salmon.

"We are seeing unprecedented changes in the environment," Toby Garfield, Director of the Environmental Research Division at the NOAA's Southwest Fisheries Science Center, said when presenting these results to the Pacific Fishery Management Council this week.

He added that climate and ecological indicators are "pointing toward lower primary productivity" off the coasts of California, Oregon, and Washington in particular.

Primarily, the report centers around the state of the California Current - the large network of Pacific Ocean currents that move southward along the West Coast to break away into deeper water just off southern Baja California.

The report details how "record-high sea surface temperatures combined with shifts in the Pacific Decadal Oscillation, North Pacific Gyre Oscillation and weaker upwelling of deep, cold waters indicate declining productivity in the California Current."

Additionally, multiple field surveys have revealed that important energy-rich organisms called copepods - a primary base for the general food chain - have seen significant decline in the past few years. They are being bullied out by an alternate copepod population more adapted for warmer water - plankton that, unfortunately, serve as a poorer source of nourishment. (Scroll to read on...)

The report even adds that while the incredibly severe drought that is currently rocking California is likely driven by natural climate patterns, its impact on local aquatic populations is being exacerbated by the warming waters of climate change.

Salmon in particular face these hardships from three fronts, where low snowpack from a warming Northwest and drought in California are shrinking rivers and streams, even as the Pacific's reduced ocean productivity means less food for juveniles.

And while the report's authors admit that the impact of these factors would not be felt just yet, they warn that a wild salmon sustainability "bubble" could pop in only a few more generations.

"We are in some ways entering a situation we haven't seen before," said Cisco Werner, Director of the Southwest Fisheries Science Center in La Jolla, Calif. "That makes it all the more important to look at how these conditions affect the entire ecosystem because different components and different species may be affected differently."

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