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States Vulnerable to Ocean Acidification

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States Vulnerable to Ocean Acidification PACIFIC NORTHWEST IS AT HIGH RISK FOR ECONOMIC HARM DUE TO OCEAN ACIDIFICATION According to a new assessment of the U.S. communities most vul- nerable to ocean acidification, the Date Water Pacific Northwest is at high risk of Unfavorable Economic Sensitivity To Shellfish Score Other Factors economic harm. Communities and 2006 - 2030 High Algae Blooms 2031 - 2050 Medium High River Inputs governments can still take action, 2051 - 2070 Medium Upwelling 2071 - 2099 Medium Low researchers say. 2099 + Low MAP LEFT: The long-term economic impacts of ocean acidification are expected to be most severe in regions where ocean areas are acidifying soonest (black) and where the residents rely most on local shellfish for their livelihood (red). Local factors such as algae blooms from nutrient pollu- tion, local upwelling currents, and poorly buffered rivers (green, purple, blue) can amplify acidification locally. adapted by NRDC from Ekstrom et al., 2015 adapted by NRDC from Ekstrom et al., 2015 WHY IS THE PACIFIC NORTHWEST A HOTSPOT? ECONOMIC DEPENDENCE OCEAN VULNERABILITY A SALTY GOLDMINE. Shelled Some believe Puget Sound is the greatest oyster-growing mollusk fisheries in Washington region on the planet. Cold, clean and Oregon produce slightly water from deep currents off the more than $100 million annu- coast, a winding coastline with ally in direct sales. Though the thousands of inlets with sheltered economic benefits extend well water, and an abundant supply of beyond the value of the harvest. The estimated mountain-fed rivers all contribute to this perception. But this same formula has also total annual economic impact of aquaculture in put the region at risk from ocean acidification. Washington State is estimated to be $270 million. COLD WATERS SPELL TROUBLE: The waters off of Washington and Oregon are cold. This increases JOBS, JOBS, JOBS. Shellfish aquaculture alone is the threat from ocean acidification because C02 estimated to support 3,200 direct and indirect dissolves more readily in cold water. jobs in the state of Washington. COASTAL CURRENTS: Natural weather patterns churn up deep, acidified water onto the coastline in a A KEYSTONE FOR REGIONAL BUSINESSES: Shellfish process known as upwelling. hatcheries in Netarts Bay in northern Oregon sup- ply important oyster ‘seed’ to the entire region’s POLLUTION HELPS SOUR THE WATERS: Farms, lawns, and leaky sewage systems pollute waterways with aquaculture industry. They play a central role in PHOTO CAPTION: Bagged Olympia oysters sit bagged for processing at the Taylor excess nutrients, causing trouble such as excess the regions shellfish industry. algae blooms in Puget Sound. When uneaten Shellfish processing plant. algae die and decompose, CO2 is released. That PHOTO CREDIT: Benjamin Drummond / bdsjs.com raises water acidity even higher. NRDC FEBRUARY 2015 WHAT CAN WE DO? WHAT IS OCEAN ACIDIFICATION? THE OCEANS NATURALLY absorb carbon dioxide from our atmosphere. Now, however, we’ve tinkered with that equa- tion, dramatically increasing the amount of carbon dioxide entering the ocean through more than a century of burning fossil fuels. Alaska fishermen send urgent message to save the oceans from ocean acidification. | PHOTO: Lou Dematteis/Spectral Q When carbon dioxide dissolves THE MOST EFFECTIVE STEP toward healthier oceans is to stop pumping carbon dioxide into the ocean, it triggers into the sea from cars, factories, and power plants. But Oregon and Washington chemical reactions that reduce policymakers—and residents—don’t need to wait for global coordination, the pH (increasing its acidity) researchers say. They can make a difference now: while also reducing the availability of compounds such as carbonate. INVEST in shellfish aquaculture techniques to help protect mollusks from Carbonate is crucial because corrosive waters during their sensitive larval phase. many shellfish and corals need it to build their skeletons and shells. HELP NATURE cultivate ocean acidification-resistant bivalves by selecting and With less of it, organisms expend breeding strains that are naturally more resistant to the ocean changes. more energy on shell-building and less on eating and basic survival. INCREASE FUNDING for targeted research and monitoring programs that help This can harm the organism and protect the shellfish industry such as the National Oceanic and Atmospheric Administration's Sea Grant program and the Federal Ocean Acidification reduce populations. Research and Monitoring program. As ocean acidification acceler- ates, it now poses a serious threat REDUCE nutrient pollution that flows into waterways through smart farming and to the web of life underwater. development techniques and upgraded sewage treatment. More than any state in the nation, Washington has taken action to reduce the impacts of ocean acidification. In 2012, then-Governor Christine Gregoire signed an executive order outlining a plan of action to reduce the harm of ocean acidification to RAPID DECLINE IN: Washington’s marine resources. Many of these recommendations have already been OCEAN pH implemented. This effort should continue and be integrated in a larger West-Coast initiative. OCEAN pH IN 1860 ABOUT THE STUDY THE FINDINGS ABOUT THE PACIFIC NORTHWEST are scallops, which will likely be the first U.S. contained in a new paper, “Vulnerability and fisheries harmed by ocean acidification. Adaptation of US Shellfisheries to Ocean They mapped locations in the ocean expe- Acidification,” published today in Nature Cli- riencing the most rapid changes from rising PROJECTED OCEAN pH IN mate Change. The study breaks new ground CO2 in the atmosphere. They identified plac- 2100 by identifying the communities along our es where local factors such as algae blooms nation’s shores that will most likely suffer contribute to acidification, and mapped long-term economic harm from ocean acid- coastal communities that would be most vul- ification, revealing a mosaic of vulnerability nerable to declining harvests. Finally, they to ocean acidification nationwide. identified places where all these variables Coastal communities in 15 states overlapped. are at high economic risk from ocean acid- This work was supported by the ification due to their dependence on U.S. National Socio-Environmental Synthesis shelled mollusk fisheries, which brings in Center under funding received from the $1 billion annually. The researchers urge National Science Foundation DBI-1052875. INFOGRAPHIC: This infographic is part of the Ocean Acidification policymakers to take action now to protect Summary for Policy Makers – Third Symposium in an Ocean in a these regions. High CO2 World sponsored by IGBP, IOC-UNESCO, and SCOR for Researchers studied harvests from more information www.igbp.net. shelled mollusks such as oysters, clams, and NRDC FEBRUARY 2015.
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