7 peabody s4 oa presentation2 - peabody 10-27-10Presentation Transcript
Ocean Acidification Monitoring in Totten Inlet Betsy Peabody Puget Sound Restoration Fund Tel: 206.780.6947 Email: email@example.com www.restorationfund.org Thanks to Dan Cheney, Simone Alin, Brian Allen, Bobbi Hudson & Calm Cove Oyster Co. for slides
Partners NOAA PMEL University of Washington (APL, Oceanography) Pacific Shellfish Institute Puget Sound Restoration Fund Pacific Coast Shellfish Growers Association Taylor Shellfish Baywater, Inc. Department of Ecology Funded by the Puget Sound Partnership
TheWarningSigns Shellfish Hatcheries – Oregon, Washington, and beyond
The Warning Signs Effects on Willapa/Grays Harbor ecology and growers
A Larger Problem 25% of the CO2 we emit is absorbed by the world’s oceans Ocean acidification is the gradual decrease in pH due to rising CO2. Increased acidity leads to increased mortality in calcium dependent creatures – shellfish, plankton, corals, algae
Mauna Loa atmospheric CO2 (ppmv) Aloha seawater pCO2 (µatm) Aloha seawater pH 400 8.38 8.33 375 8.28 350 8.23 8.18 325 8.13 300 8.08 275 8.03 1950 1960 1970 1980 1990 2000 2010 2020 A Larger Problem The Acid Ocean The Manoa Loa data and ocean acidity y = (1.738 ± 0.0293)x – 3105.9 R2 = 0.94 pH CO2 y = (1.855 ± 0.224)x – 3364 R2 = 0.310 y = (-0.0019 ± 0.00025)x + 11.82 R2 = 0.265 Year
A Larger Problem Coastal upwelling
Water upwelled off coast is loaded with more CO2 than anywhere else in the world (10% higher than Atlantic).
The North Pacific is at the end of a deep circulation line.
It’s full of old water (cold, salty, CO2-rich, low pH).
A Larger Problem Aragonite Increasing acidity from CO2 lowers saturation level of aragonite. Shelled organisms need high aragonite to grow. Bivalve juveniles experience significant mortality when aragonite values decrease and their aragonite shell dissolves.
Question: Is There an Effect on Natural Shellfish Populations in Puget Sound Puget Sound Partnership funded an oyster monitoring project during 2009-2010 settlement seasons
Puget Sound Sampling Stations Big Cove, Totten Inlet Dabob Bay, Hood Canal
Sample Collection Weekly samples of seawater, spatfall and planktonic larvae, May – Sept. Data correlated with oceanographic measurements (DIC, TA, pH, carbonate ion conc. & aragonite sat.)
Totten Inlet Summer 2009
Totten Inlet Summer 2010
Differences between Olympia oysters and Pacific Oysters
Potential Effects of Corrosive Seawater Shellfish production Natural Filtration Ecological Services Ecosystem Restoration Fewer Local Food Sources Increasingly Eutrophic Waters Troubled Local Economies
Discussion Points No sign yet in Puget Sound that there is an effect on natural shellfish populations Monitoring should continue given risk factors and potential impacts Answering the question will be tricky given natural variability in recruitment.
Where do we go from here? Ocean acidification drives home the reality of a big, global phenomenon. Knowing about potential local effects increases the urgency to reduce global CO2 emissions. There are outreach opportunities we can and should seize since climate change and global warming are THE topics of the day among our children’s generation.
Thanks Richard Feely Simone Alin Christopher Sabine Jan Newton Daniel Cheney Brian Allen Jonathan Davis Allan Devol Duane Fagergren Calm Cove Oyster Co. Christopher Krembs Robin Downey Andy Suhrbier Bobbi Hudson Aimee Christy Mary Middleton Kristen Rasmussen