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Oyster farmers and ocean acidification (text & video)

The ocean is so acidic that it is dissolving the shells of our baby oysters,” says Diani Taylor of Taylor Shellfish Farms in Shelton, Washington. She and her cousin Brittany are fifth-generation oyster farmers, and are grappling with ocean waters that are more acidic and corrosive than their fathers, grandfathers, and great-grandfathers knew. This “ocean […]

Design, construction, and operation of an actively controlled deep-sea CO2 enrichment experiment using a cabled observatory system

We describe the design, testing, and performance of an actively controlled deep-sea Free Ocean CO2 Enrichment (dp-FOCE) system for the execution of seafloor experiments relating to the impacts of ocean acidification on natural ecosystems. We used the 880 m deep MARS (Monterey Accelerated Research Initiative) cable site offshore Monterey Bay, California for this work; but […]

ICCAT Moves to Properly Manage Bluefin Tuna, but Doesn’t Take Action for Sharks and Swordfish

Bluefin tuna (Thynnus thynnus), pictured an Oceana Marviva Med Mediterranean Expedition in 2008. (Photo: Oceana / Keith Ellenbogen) Earlier this month, the International Commission for the Conservation of Atlantic Tunas (ICCAT) concluded...Show More Summary

Ocean acidification (audio)

The most serious, debilitating circumstance affecting the ocean today may be acidification, the changing pH or acid balance in the water column with devastating impacts on the marine food chain, species migration and reproduction. In this episode of World Ocean Radio, host Peter Neill will report on the recently-released 20 Facts About Ocean Acidification. Peter Neill, […]

Ocean acidification report vote delayed

AUGUSTA — The commission studying the impacts of ocean acidification on the state’s commercial fisheries is asking legislative leaders for permission to meet one more time before issuing the final version of its report. The Legislature established the mellifluously named Commission to Study the Effects of Coastal and Ocean Acidification and Its Existing and Potential […]

Reefs shift from net accretion to net erosion along a natural environmental gradient

Coral reefs persist in an accretion-erosion balance and ocean acidification resulting from anthropogenic CO2 emissions threatens to shift this balance in favor of net reef erosion. Corals and calcifying algae, largely responsible for...Show More Summary

Ocean acidification exacerbates the impacts of global warming on embryonic little skate, Leucoraja erinacea (Mitchill)

Ocean acidification and warming have the potential to profoundly impact marine fishes by reducing embryo fitness and survival. Local adaptation to thermal gradients may reduce the impact of global warming, but whether fish from different populations may respond differently to climatic stressors remains unknown. Show More Summary

Physiological and biochemical responses of diatoms to projected ocean changes

With progressive future global change, marine phytoplankton in surface oceans will be subjected to ocean acidification, as well as to increased solar exposures and decreased vertical transport of nutrients from depth due to increasing stratification. Show More Summary

How good are we at assessing the impact of ocean acidification in coastal systems? Limitations, omissions and strengths of commonly used experimental approaches with a special emphasis on the neglected role of fluctuations

Much of our past research on ocean acidification has focussed on direct responses to pCO2 increase at the (sub-) organism level, but does not produce findings that can be projected into the natural context. Based on a review of about 350 recent articles mainly on ocean acidification effects, we highlight major limitations of commonly used […]

Is Jurassic World Violating CITES Protections?

Have you seen the new Jurassic World trailer?  As if I even have to ask…  Of course you have.  And of course you are amazed by the scene featuring what appears to be either a short-necked species of pliosaur (maybe a Kronosaurus?) or a super-sized version of a mosasaur, (an extinct marine reptile, not a […]

Sea Turtles Can Get the Bends after Capture in Fishing Gear, Says New Study

A loggerhead sea turtle caught on a longline in the Mediterranean. New research shows sea turtles can get “the bends” after being caught in fishing gear. (Photo: Oceana / Mar Mas) If you’re an avid scuba diver, you’re probably all too...Show More Summary

Ocean Roundup: Fiddler Crabs Found Far North of Their Range, 500 Dead Sea Lions Discovered in Peru, and More

A fiddler crab (Uca pugnax). Fiddler crabs may be expanding their range northward from climate change. (Photo: b-cline / Flickr Creative Commons) - New 3D mapping around Antarctica found that sea ice surrounding Antarctica is thicker than thought. Show More Summary

Uncertainties in measurements of ocean carbon dioxide levels

Carbon dioxide (CO2) emissions are not affecting only the atmosphere: 30% of anthropogenic CO2 emissions were absorbed by the oceans in the past few decades, recent estimates show. However, Kouketsu and Murata note that these estimates are based entirely on research that was conducted in the 1990s and that more recent measurements of oceanic CO2 […]

Coccolithophore calcification response to past ocean acidification and climate change

Anthropogenic carbon dioxide emissions are forcing rapid ocean chemistry changes and causing ocean acidification (OA), which is of particular significance for calcifying organisms, including planktonic coccolithophores. Detailed analysis...Show More Summary

Video: Watch the Incredible Migration of Thousands of Giant Spider Crabs in Australia

Spider crabs migrate across Port Phillip Bay in Australia. (Photo: Museum Victoria / YouTube) Australia is famous for its teeming, colorful biodiversity like sea turtles, giant clams, and coral, but it’s the Great Barrier Reef that often receives the most attention for its wildlife. Show More Summary

Six surprising reasons to be thankful for the sea

The oceans provides us with most of the oxygen we breath, much of the food we eat, and even all the water we drink, which has passed countless times through the seas. There’s no shortage of reasons to be grateful for our blue planet, but I thought I’d take a quick moment to appreciate some of the […]

Oceana in Chile Submits Recommendations for Lowering Common Hake Catch Quotas

Hakes (Merluccius sp.) in a crate. (Photo: Oceana / LX) Last week, Oceana in Chile recommended that the Chilean government lower the total annual catch quota for common hake—a severely overexploited species— in 2015 by about 1,000 tons because of declines. Show More Summary

Ocean Roundup: Dolphins Use Whistles as Names, Conservationists Call for Removal of Queensland Shark Nets, and More

The Indo-Pacific bottlenose dolphin (Tursiops aduncus) is found to use whistles as names for individual dolphins. (Photo: Alexandre Roux / Flickr Creative Commons) - A new study has unlocked a key to dolphin communication: The Indo-Pacific...Show More Summary

Ocean acidification rapidly reduces dinitrogen fixation associated with the hermatypic coral Seriatopora hystrix

Since productivity and growth of coral-associated dinoflagellate algae is nitrogen (N)-limited, dinitrogen (N2) fixation by coral-associated microbes is likely crucial for maintaining the coral-dinoflagellate symbiosis. It is thus essential to understand the effects future climate change will have on N2 fixation by the coral holobiont. Show More Summary

New maps show Bering Sea holds world’s most acidic ocean waters

The world’s most acidic ocean waters are found in the winter in the Bering Sea, according to studies by scientists at Columbia University’s Lamont-Doherty Earth Observatory who have released a series of maps tracking changes in global marine acidity. With its broad continental shelf, shallow waters, ocean currents that deposit nutrients from around the world, and […]

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