Quantcast

NOAA: Ocean Acidification Rises, Marine Economy Sinks

The waters off the U.S. state of Alaska are some of the best fishing grounds anywhere, teeming with salmon and with shellfish such as crab.

Among the sea species most vulnerable to acidification are shellfish, because a build-up of acid in waters prevents species developing their calcium shells.
Photo credit: Shutterstock

But a new study, funded by the U.S. National Oceanic and Atmospheric Administration (NOAA), says growing acidification of Alaska’s waters, particularly those off the southern coast, threatens the state’s whole economy—largely dependent on the fishing industry.

The study, which appears in the journal Progress in Oceanography, says that not only will the state’s commercial fishing sector be badly hit by a growth in acidification, but it will also affect subsistence fisherpeople whose diet mainly consists of the catch from local waters.

Forming acid

The oceans act as a “carbon sink,” absorbing vast amounts of carbon dioxide. Acidification occurs when amounts of carbon dioxide are dissolved into seawater, where it forms carbolic acid.

Scientists say the oceans are now 30 percent more acidic than they were at the beginning of the industrial revolution about 250 years ago.

Among the sea species most vulnerable to acidification are shellfish, because a build-up of acid in waters prevents species developing their calcium shells. Alaska’s salmon stocks are also at risk as one of the main ingredients of a salmon diet are pteropods, small shell creatures.

Jeremy Mathis, an NOAA oceanographer and a lead author of the study, told the Alaska Dispatch News that whereas past reports had focused on the consequences of increased acidification on ocean species, the aim of this one was designed to examine the wider economic impact.

Read page 1

“This is an economic-social study,” Mathis said. “It focuses on food security, employment opportunity and the size of the economy.”

Mathis said acidification is more likely in Alaskan waters than in many other parts of the world. He explained: “It’s all about geography. The world’s ocean currents end their cycles here, depositing carbon dioxide from elsewhere. The coastal waters of Alaska sit right at the end of the ocean conveyor belt.”

Elsewhere, acidification is already having a serious impact on fishing and shellfish industries.

Crab pots and fishing nets at Dutch Harbour, Alaska. Photo credit: Michael Theberge/NOAA Photo Library via Wikimedia Commons

Oysters dying

The New York Times reports that billions of baby oysters—known as spat—are dying off the coast of Washington state in the north-western U.S.

In May this year, the U.S. government’s major report on climate change, the National Climate Assessment, said that waters off the north-west of the country are among the world’s most acidic.

Jay Inslee, Governor of Washington, says an industry worth US$270 million is at risk. “You can’t overstate what this means to Washington,” he says.

Inslee and many others in Washington state are fighting plans by the coal industry to build large coal ports in the region in order to export to China and elsewhere in Asia.

Climate scientists say greenhouse gas emissions resulting from coal burning are a main cause of global warming.

You Might Also Like

Increase in Ocean Acidification Threatens Longevity of Shellfish and Coral

Sea Shepherd Founder to Bill Maher: ‘If Oceans Die, We Die’

How Acidification, Overfishing and Plastics Threaten the World’s Oceans

EcoWatch Daily Newsletter

Natural Resources Defense Council

By Emily Deanne

Shower shoes? Check. Extra-long sheets? Yep. Energy efficiency checklist? No worries — we've got you covered there. If you're one of the nation's 12.1 million full-time undergraduate college students, you no doubt have a lot to keep in mind as you head off to school. If you're reading this, climate change is probably one of them, and with one-third of students choosing to live on campus, dorm life can have a big impact on the health of our planet. In fact, the annual energy use of one typical dormitory room can generate as much greenhouse gas pollution as the tailpipe emissions of a car driven more than 156,000 miles.

Read More Show Less
Kokia drynarioides, commonly known as Hawaiian tree cotton, is a critically endangered species of flowering plant that is endemic to the Big Island of Hawaii. David Eickhoff / Wikipedia

By Lorraine Chow

Kokia drynarioides is a small but significant flowering tree endemic to Hawaii's dry forests. Native Hawaiians used its large, scarlet flowers to make lei. Its sap was used as dye for ropes and nets. Its bark was used medicinally to treat thrush.

Read More Show Less
Sponsored
Frederick Bass / Getty Images

States that invest heavily in renewable energy will generate billions of dollars in health benefits in the next decade instead of spending billions to take care of people getting sick from air pollution caused by burning fossil fuels, according to a new study from MIT and reported on by The Verge.

Read More Show Less
Aerial view of lava flows from the eruption of volcano Kilauea on Hawaii, May 2018. Frizi / iStock / Getty Images

Hawaii's Kilauea volcano could be gearing up for an eruption after a pond of water was discovered inside its summit crater for the first time in recorded history, according to the AP.

Read More Show Less
A couple works in their organic garden. kupicoo / E+ / Getty Images

By Kristin Ohlson

From where I stand inside the South Dakota cornfield I was visiting with entomologist and former USDA scientist Jonathan Lundgren, all the human-inflicted traumas to Earth seem far away. It isn't just that the corn is as high as an elephant's eye — are people singing that song again? — but that the field burgeons and buzzes and chirps with all sorts of other life, too.

Read More Show Less
Sponsored
A competitor in action during the Drambuie World Ice Golf Championships in Uummannaq, Greenland on April 9, 2001. Michael Steele / Allsport / Getty Images

Greenland is open for business, but it's not for sale, Greenland's foreign minister Ane Lone Bagger told Reuters after hearing that President Donald Trump asked his advisers about the feasibility of buying the world's largest island.

Read More Show Less
AFP / Getty Images / S. Platt

Humanity faced its hottest month in at least 140 years in July, the US National Oceanic and Atmospheric Administration (NOAA) said on Thursday. The finding confirms similar analysis provided by its EU counterparts.

Read More Show Less
Newly established oil palm plantation in Central Kalimantan, Indonesia. Rhett A. Butler / Mongabay

By Hans Nicholas Jong

Indonesia's president has made permanent a temporary moratorium on forest-clearing permits for plantations and logging.

It's a policy the government says has proven effective in curtailing deforestation, but whose apparent gains have been criticized by environmental activists as mere "propaganda."

Read More Show Less