27 Oct 2009:
Ocean Acidification’s Effects
Documented in New Study of Shellfish
Relatively small increases in ocean acidity significantly harm clams, bay scallops, and oysters, particularly in their crucial larval stage
, according to a new study. Researchers at the State University of New York, Stony Brook, exposed shellfish to levels of acidity expected in Earth’s oceans later this century and next century, and found that modest increases in acidity led to a 50 percent decline in survival of clam and scallop larvae, reduced the size of the larvae, and caused the larvae to develop more
slowly. Oyster larvae also grew more slowly, but their survival was not affected until ocean acidity reached levels expected next century. The world’s oceans absorb about half of the 30 billion tons of carbon dioxide released annually by burning fossil fuels, and the increased carbon dioxide is rapidly making the oceans more acidic
, inhibiting the ability of mollusks such as clams and scallops to make their calcium carbonate shells. The researchers said the detrimental impact of ocean acidity on shellfish larvae growth rates is particularly worrisome, as the larvae are free-swimming and exposed to predation. The group’s work is being published in the journal Limnology and Oceanography
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
e360 on Facebook
Donate to e360
View mobile site
Subscribe to our newsletter
Subscribe to our feed:
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
Photographer Peter Essick documents the swift changes wrought by global warming in Antarctica, Greenland, and other far-flung places. View the gallery.
is now available for mobile devices at e360.yale.edu/mobile
The Warriors of Qiugang
, a Yale Environment 360
video that chronicles the story of a Chinese village’s fight against a polluting chemical plant, was nominated for a 2011 Academy Award for Best Documentary (Short Subject).
Watch the video.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.
In a Yale Environment 360
video, photographer Pete McBride documents how increasing water demands have transformed the Colorado River, the lifeblood of the arid Southwest. Watch the video.