Tuesday, February 28, 2017
West Coast prepares for ‘double whammy’ threat to ocean health

West Coast prepares for ‘double whammy’ threat to ocean health

New action plan will help coastal businesses boost their resilience to future changes

Monday, April 4, 2016

Dissolving sea snail shell

Dissolving sea snail shell

Rising acidity in West Coast ocean waters is causing the shells of tiny sea snails that are food to salmon and herring to dissolve. (NOAA)
Rising levels of acidity in the ocean and growing areas of low-oxygen waters are a “double whammy” threat for fishing industries, ecosystems and economies along the U.S. West Coast and Canada’s British Columbia, according to new report by a panel of experts that includes NOAA scientists.

The study, conducted by the 20-member West Coast Ocean Acidification and Hypoxia Science Panel, also comes with an action plan that will help coastal communities lessen their exposure to these twin challenges and boost their resilience to future changes.

Bi-national roadmap

Bi-national roadmap

Scientists from the West Coast states of California, Oregon and Washington joined with scientists from Canada's British Columbia to provide a roadmap to resilience for ocean acidification and hypoxia. (Google)
According to the panel, ocean acidification is already affecting the region’s oyster hatcheries and the ability of tiny sea snails – an important food for salmon and herring – to build and maintain their shells. As ocean acidification intensifies due to increasing carbon dioxide emissions, a range of shellfish industries producing oysters, mussels, and crabs, may be subject to significant economic losses.

Making matters worse, scientists note that warming waters and nutrient runoff from land are resulting in more occurrences of low dissolved oxygen (hypoxia) that kill fish or force them to other places.

“The sea changes we’re seeing on the West Coast are not isolated. Other coastal areas across the nation and world are experiencing first-hand the local consequences of global climate change,” said NOAA Chief Scientist Rick Spinrad. “I applaud this bi-national panel’s commitment to work across state and national boundaries to help our fishing industries—and the communities that rely on them—become more resilient.”

Plan of action

Plan of action

West Coast Ocean Acidification and Hypoxia Science Panel recommendations will help coastal managers improve their communities' resilience to ocean health threats (West Coast Ocean Acidification and Hypoxia Science Panel)
The panel was convened by the California Ocean Science Trust in 2013 at the request of the California Ocean Protection Council. California, Oregon, Washington and British Columbia charged the panel with summarizing the state of knowledge and recommending ways to reduce ocean acidification and hypoxia.

Some of the actions in the plan include strategies to reduce carbon dioxide in water by protecting and restoring seagrass beds, kelp forests and other plants that take up carbon dioxide and reducing land-based runoff that degrades coastal waters, contributing to hypoxia. The panel also recommends establishing ocean acidification and hypoxia research priorities that will better equip communities facing these harmful ocean changes.

Seagrass strategy

Seagrass strategy

Protecting and restoring seagrass beds and kelp forests that take up carbon dioxide and reducing land-based runoff that degrades coastal waters can help reduce ocean acidity and hypoxia. (Eric Heupel/Creative Commons)
Richard Feely, oceanographer at NOAA’s Pacific Marine Environmental Laboratory, and Waldo Wakefield, research fisheries biologist at NOAA’s Northeast Fisheries Science Center, brought their expertise to the panel. For more information, please read the panel’s report and recommendations.

Additional information:

NOAA Ocean Acidification Program website

NOAA supports research to improve projections of ocean acidification impacts.

For more information, please contact Monica Allen, director of public affairs for NOAA Research, at monica.allen@noaa.gov or by phone at 301-734-1123.

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