Ocean Currents

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Ocean Currents

News, opinions, photos and facts from Ocean Conservancy

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About Sarah Cooley

Sarah Cooley, Ph.D. is the Director of the Ocean Acidification Program at Ocean Conservancy. She is particularly interested in how global ocean changes like ocean acidification affect human communities, and she works to bring cutting-edge science into policy making.

Corals are Like… What?!

Posted On July 25, 2016 by

This week we’re celebrating all things coral! It’s no secret that coral reefs are spectacular ecosystems, but we wanted to do a deep dive into what exactly makes corals so special. Check out nine ways corals are even cooler than you thought:

1)  Corals are like speed bumps. They slow down waves and lessen wave energy. This protects coastlines from hurricanes, cyclones and tsunamis. Coral reefs protect the shoreline in 81 countries around the world, sheltering the 200 million people living along those coasts.

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How Ocean Acidification Impacts Florida’s Ecosystems

Posted On June 15, 2016 by

Reef-building corals find refuge from climate change in mangrove habitats. Photo credit: Caroline Rogers, USGS.

Dr. Kimberly Yates will be a panelist at an ocean acidification roundtable we are hosting in Miami this week. There, she will join other scientists, Florida elected officials and local businesspeople in discussing what ocean acidification has in store for Florida’s marine life and its coastal communities. Follow the meeting on Twitter via #FL_OA on Friday, June 17!

OC: Your research focuses on several marine habitats in Florida: coral reefs, estuaries and mangroves. How are they coping with ocean acidification?

Dr. Yates: Most of what we know about how ocean acidification is affecting these environments comes from experimental research. We know some marine organisms will be negatively impacted, and some may benefit. For example, some species that form their skeletons and shells from minerals made of calcium carbonate, like corals and some shellfish, are negatively impacted. Ocean acidification slows the rate at which they grow their skeletons and shells, and can also cause calcium carbonate minerals to dissolve.

Other species like seagrasses and some marine algae benefit from ocean acidification because it increases their growth rates. Coral reefs have been degrading rapidly over the past few decades, and recent research shows that some reefs in the Florida Keys are beginning to dissolve during certain times of the year from ocean acidification…which was not expected to happen for another few decades. Estuaries and mangrove wetlands support many species of shellfish, and ocean acidification may negatively impact those species and the economies that depend on shell fisheries. We are still learning about how changes caused by ocean acidification are impacting these habitats.

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Caring for Crabs is Caring for the Coast

Posted On May 23, 2016 by

San Franciso Bay Area Dungeness crabber Captain John Mellor

“We’re like the Giants. We’re your hometown team,” said Captain John Mellor last week as he described the San Francisco Bay Dungeness crab fishing fleet. Capt. Mellor’s pride in his work as a crabber is paired with a love for what he does. But, his feelings are mixed with fear for the future. A West-Coast wide toxic algae bloom shut down the fishery last year, leaving him out of work for five months. Fishermen and researchers are also worried that ocean acidification could represent a looming threat to the fishery that could cause future fishing disruptions.

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Will Ocean Acidification Affect Dungeness Crabs?

Posted On May 18, 2016 by

2016 hasn’t been a good year for the West Coast Dungeness crab fishery. The fishing season that typically spans the winter months – worth $212 million in 2014  – got significantly delayed this year when Dungeness crabs tested high for domoic acid, which sickens humans, and managers shut down the fishery. The crabs had fed heartily on a giant toxic bloom of Pseudonitschia algae, which produce domoic acid, and which were thriving in an unusually warm body of water stalled offshore, affectionately called “the blob.” The bloom also shut down other West Coast shellfish fisheries, too. The lost harvests equal lost income for West Coast communities. San Francisco Bay Area crabber John Mellor says, “If crabs were to disappear from the picture, I think it would be the end of my fishing career at this point.”

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West Coast Scientists Weigh Actions Against Ocean Acidification and Hypoxia

Posted On April 4, 2016 by

Ten years ago, I was finishing graduate school. I was becoming an expert on how carbon dioxide is stored in the world’s oceans, but – and this seems weird to me now – I hadn’t heard about ocean acidification. Hardly anyone had. Only a handful of scientists had started to realize that as the ocean sops up carbon dioxide from the atmosphere, ocean chemistry changes in ways that can hurt fish, shellfish, and corals.

Just five years later, concern about ocean acidification had grown dramatically, and thousands of people were involved. West Coast shellfish growers were trying to save their hatcheries from the effects of ocean acidification, while scientists were scrambling to offer information and solutions. Ocean Conservancy began working on this issue in 2012, helping bring affected business people, policy makers, and scientists together during the initial search for solutions in Washington State, whose shellfish hatcheries experienced dramatic die-offs of their oyster larvae.

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Don’t Forget the Ocean!

Posted On October 14, 2015 by

Around here, we’re always thinking about the ocean. But sometimes the ocean isn’t always top-of-mind for world leaders, who must balance many pressing concerns. Nevertheless, dozens of world political, scientific, and environmental leaders made time to attend the second “Our Ocean” conference in Valparaiso, Chile last week.

Continuing the momentum developed at the first “Our Ocean” meeting in June 2014, speakers reviewed the critical importance of caring for the ocean that sustains human life. Ocean acidification was one of the main conference topics, and speakers underscored our best option for curbing it: cutting atmospheric carbon dioxide pollution.

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Unraveling Ocean Acidification’s Mysteries Along the Coast

Posted On October 13, 2015 by

In the past, we’ve shared good news with you about ocean acidification research funds allocated by the Federal government. Ever wonder what sorts of research projects NOAA supports with this money? A few days ago, NOAA announced three new awards to universities totaling $1.3 million to study how ocean acidification is changing the coastal ocean. We already know that nearshore waters are becoming more acidic and losing oxygen. These three universities will be looking at the root causes, and trying to understand what that means for marine plants and animals, and the people that rely on them.

What’s new and particularly ambitious about these projects is that they will study ocean acidification in coastal environments, which are incredibly complex. Not only do coastal waters take up carbon dioxide from the atmosphere, but they also receive fertilizer, sewage, and toxic chemical pollution from coastal development, host vibrant ecosystems, and receive pulses of freshwater runoff after storms. The net effect is that coastal water chemistry is the product of these layered processes. None of the processes happens at the same time or in the same place, making it difficult to understand which processes drive which effects.

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