Saving Seafood

Warming seas are robbing some fish of their vital sense of smell

August 6, 2018 — There have been numerous wake-up calls about the effects of climate change on marine life. As ocean waters heat up, they are bleaching corals. Growing levels of carbon dioxide are acidifying seawater, which is degrading the shells and skeletons of sea organisms. The rising temperatures are prompting fish to migrate to colder waters, even causing them to shrink.

Now climate change is starting to affect their sense of smell, a phenomenon that will worsen in the coming years if global warming continues unabated, according to new research. A sense of smell is indispensable to fish. They use it to find food, detect imminent danger and elude predators, to find safe environments and spawning areas, even to recognize one another.

To lose it could threaten their very survival. If this happens, it also would mean big trouble for the fishing industry, tourism and, most importantly, global nutrition, since many of the world’s people — including its poorest — depend on fish for food.

“Future levels of carbon dioxide can have large negative effects on the sense of smell of fish, which can affect fish population numbers and entire ecosystems,” said Cosima Porteus, a researcher at the University of Exeter and author of the study, which appears in the journal Nature Climate Change.

“This can be prevented, but we must reduce carbon emissions now before it’s too late,” Porteus says.

Carbon dioxide combines with seawater to produce carbonic acid, which makes the water more acidic. Since the Industrial Revolution, oceanic CO2 has risen by 43 percent and is projected to be two and a half times current levels by the end of this century, according to the scientists.

Read the full story at Popular Science

The Ocean Is Getting More Acidic —What That Actually Means

June 18, 2018 — Grace Saba steadies herself on the back of a gently rocking boat as she and her crew slide a six-foot long yellow torpedo into the sea. A cheer erupts as the device surfaces, turns on its electronic signal, and begins a three-week journey along the New Jersey coast.

“It’s taken seven years to get this done,” said Saba, who has been working on this experiment since 2011. “I’m so happy, I think I might cry!”

Saba is an assistant professor of marine ecology at Rutgers University, where she is studying how fish, clams, and other creatures are reacting to rising levels of ocean acidity. Acidification is a byproduct of climate change; a slow but exorable real-life experiment in which industrial emissions of carbon dioxide into the atmosphere are absorbed and then undergo chemical reactions in the sea. Rising ocean acidity has already bleached Florida’s coral reefs and killed valuable oysters in the Pacific Northwest.

Now scientists like Saba want to know what might happen to animals that live in the Northeast, a region home to commercially important fishes, wild stocks of quahogs (clams), scallops, and surf clams that can’t swim away from growing acidic waters.

“They are just stuck there,” Saba said.

Saba’s torpedo-like instrument is actually an underwater drone, known as a Slocum glider, that is carrying an ocean acidity sensor. This is the first time that oceanographers have married the two technologies—glider and pH sensor—to get a big-picture view of changes underway in the commercially important fishing grounds of the Northeastern United States.

Read the full story at National Geographic

Ocean Acidification Could be a Net Positive for Some Fish

March 30, 2018 — One of the consequences of pumping more and more carbon dioxide into the atmosphere is the changing chemistry of the world’s oceans. Until now, the ocean has acted as a big sponge, soaking up about one-third of the CO2 released by human activities.

But now, scientists are watching a vast experiment unfold. All that carbon dioxide is triggering chemical reactions that is turning the oceans more acidic, which in turn is making life tough for lots of marine organisms. Oysters and other shellfish have been hit by die-offs in the Pacific Northwest and Gulf of Maine, while tropical reefs are dissolving faster than they can rebuild, according to a recent study in the journal Science.

Some researchers are seriously considering geoengineering to reverse the slow acidification of the ocean. Dissolving minerals like olivine or limestone into seawater would increase its alkalinity. (Remember the pH strip in your 10 gallon fish tank? Blue=alkaline, red=acidic.) Not only would that make it easier on marine life, but it would also allow the ocean-sponge to soak up more carbon dioxide from the atmosphere. Two British scientists proposed this idea last year in a paper in the journal Reviews of Geophysics, predicting that with a bit more research (and money) it may be possible to capture hundreds of billions to trillions of tons of carbon without messing up the marine ecosystem.

But this kind of massive planetary experiment needs lots of small-scale work in the laboratory before it’s ready. So in the meantime, marine scientists are trying to find which species will come out on top in a more acidic ocean.

In Sweden, a group of researchers tested survival in an artificially acidic ocean. In a fjord, they built an enclosed, floating test tube they called a “mesocosm” and filled it with phytotoplankton, zooplankton, and tiny herring larvae. Then they turned up the dissolved carbon dioxide, tracking herring survival over time as the acidity increased.

A similar lab experiment with codfish, another important Northern European food fish, killed off the fish. “Our surprise is that we didn’t find that,” said Catriona Clemmesen-Bockelmen, a marine ecologist from the GEOMAR Helmoltz Center for Ocean Research in Kiel, Germany, and a co-author on the study in Nature Ecology and Evolution. “Instead, we had a higher survival rate.” The herring, it seemed, liked the extra acidity.

Read the full story at Wired

 

NOAA site aims to help fishing communities bounce back

November 24, 2017 — NOAA Fisheries has introduced a new website designed to help fishing communities be more resilient in the face of climate change, fluctuating fish stocks and even declines in waterfront infrastructure and economy.

The new website endeavor, introduced this week after almost three years of planning, is called Community Resilience in the Greater Atlantic Region.

“It really came out of the strategic plan we developed here in the regional office, which was the first one anywhere,” said Peter Burns of NOAA Fisheries in Gloucester. “One of the goals of that plan centered on building community resilience to help strengthen fishing communities.”

Working with NOAA’s Northeast Fisheries Science Center in Woods Hole, the community resilience working group — which included NOAA staffers from the West Coast, as well — began exploring ways to assist fishing communities in coping with regulatory, environmental and economic changes that challenge the very sustainability of fishing communities.

According to NOAA Fisheries’ own description of the endeavor, the resiliency strategy would provide information on “solutions to improve groundfish business practices and economic vitality,” as well as incorporating climate change, ocean acidification and ecosystem analysis into NOAA Fisheries’ activities.

Read the full story at the Gloucester Times

Climate change: 5 signs it’s already begun in New Jersey

August 11, 2017 — By now, most are aware of the dire warnings: Climate change is coming and its effects are going to be especially painful for residents of the Jersey Shore.

While the timing of the truly catastrophic predictions remains fuzzy — Will the barrier islands be lost in 2050? 2100? Later? Sooner? — there are signs that irreversible change has already begun.

From economic and public health challenges to the more obvious outcomes of heat waves and rising seas, climate change has a foothold in New Jersey.

1. Migrating fish

There are about 3,000 commercial fishermen in New Jersey and thousands more who work at processing plants, wholesalers or in shellfishing.

“Fishermen knew about climate change a long time ago,” said Tom Fote, an officer with the Jersey Coast Anglers Association. “We started seeing stocks of fish moving farther north.”

As water temperatures rise, fish move northward, seeking deeper, cooler waters. Higher acidity in the ocean damages crabs, scallops, clams and other shellfish, according to the U.S. Environmental Protection Agency.

Read the full story at the Asbury Park Press

Senate Subcommittee Holds First Hearing to Guide Magnuson-Stevens Reauthorization

August 2, 2017 — The Magnuson-Stevens Act, the primary law regulating fisheries in federal waters, is in need of reauthorization, and Senate Commerce’s Subcommittee on Oceans, Atmosphere, Fisheries and Coast Guard on Tuesday held the first in a series of hearings to guide that process. And, unsurprisingly, the issue of climate change made waves.

Chris Oliver, assistant administrator of NOAA’s National Marine Fisheries Service, and John Quinn, chairman of the New England Fishery Management Council, pushed for a variety of changes, ranging from management of mixed stocks to more flexibility in how the Council Coordination Committee can monitor and collect data. But it was Sen. Richard Blumenthal who made the strongest case for change by criticizing the current system for failing New England’s fishing fleet and leaving the region’s fishermen “angry and frustrated beyond words.”

Because of climate change, Blumenthal said, fish that New England fishermen have traditionally sought were pushed north and fish from southern waters moved into New England. But catch limits for certain fish haven’t been adjusted to meet the reality facing New England fishermen, forcing them to return quota-exceeding fish to the ocean. Billions of dollars in profits are being lost, Blumenthal said, while fishermen from southern states come to New England waters to catch their migrating fish. “There is something profoundly unfair and intolerable about the situation,” he added. “In my view, it violates the present law.”

Quinn responded by pointing out that parts of the New England fishing industry are booming but agreed that groundfish fishermen are struggling. While the CCC’s process is to collect as much data as needed to produce accurate stock assessments, Quinn said they didn’t have “a simple solution for rising water temperatures or the ocean acidification,” which are the roots of the shifting fish populations.

Read the full story at Politico

U.S. Conference of Mayors Pass Resolution to Fight Ocean Acidification

June 26, 2017 — Today the United States Conference of Mayors approved a resolution on ocean acidification, citing the need for more research and coordination in addressing an ever-increasing threat to coastal communities. The resolution was introduced by Mayor Jon Mitchell of New Bedford, Massachusetts.

“I’m pleased to support the resolution approved today by the Conference’s Energy Committee and the Ocean Conservancy’s many efforts to highlight the threat posed by ocean acidification,” said New Bedford Mayor Jon Mitchell, chairman of the U.S. Conference of Mayors Energy Committee. “As Mayor of New Bedford, Massachusetts, the top fishing port in the nation for the past 17 years, I understand well the threat to our fisheries and to those who rely on those fisheries to earn a living.  And I’m proud to join the many other mayors across the nation who are leading on this issue.”

The resolution states that “cities are at the forefront of preparing for, mitigating against, and responding to the consequences of changes in ocean chemistry like ocean acidification.” It encourages efforts to reduce carbon dioxide emissions, the root cause of ocean acidification, and calls on Congress to fund research assessing the vulnerability of coastal communities to its impacts.

Ocean acidification hurts the fish, shellfish, and corals that anchor the fishing and tourism industries in states as varied as Massachusetts and Florida, threatening the economy of coastal communities and businesses.  The ocean absorbs about 25 percent of carbon dioxide pollution – as a result the chemistry of the ocean is changing rapidly.

About 40 percent of the U.S. population now lives in coastal counties, and that number is growing fast. The mayor’s resolution states that leaders need better information on the threat of ocean acidification to plan for and minimize the potential harm to vulnerable communities, local businesses, and economies.

Read the full story at Ocean Conservancy

Sen. King tells researchers that data is the key to protecting lobster industry

June 6, 2017 — Calling proposed cuts in federal science funding “unacceptable,” U.S. Sen. Angus King told lobster researchers Monday that data is the key to protecting Maine’s most valuable fishery.

Maine’s independent senator asked the 250 biologists, oceanographers and fishery managers at a global conference on lobster biology in Portland this week to give him data on the impact of the changing sea environment on lobster, including temperature, salinity and acidification, and whether that is prompting a migration of Maine’s $533.1 million a year fishery to Canada.

“If lobsters are moving toward Nova Scotia and New Brunswick, that’s a serious practical issue that will get the attention of politicians,” he said. “It’s when you start seeing jobs go away that politicians start saying ‘Gee, we’d better do something about this.’ Are they moving, if they are why, and if they are, what’s the timing? Is it five years? Twenty years? A hundred years?”

But federal funding for scientific research is under fire. President Trump’s budget calls for a 17 percent cut to the National Oceanic and Atmospheric Administration, which oversees the national fisheries programs and funded almost a fifth of Maine Department of Marine Resources’ annual budget. It would eliminate the Sea Grant program, which funds research by the University of Maine’s Rick Wahle, conference co-chairman, among others.

“The lobster industry in New England is valued at close to $500 million and yet we know very little about how ocean acidification may affect this species,” Libby Jewett, NOAA’s ocean acidification director, said last fall when awarding Wahle’s team a $200,000 grant for lobster research. “These projects should help move the needle forward in our understanding and, as a result, enable broader resilience in the region.”

King said it is unlikely that Trump’s budget, containing what he considers drastic cuts in scientific funding, will pass Congress.

“The last thing we should be doing on a federal level is cutting research funding,” King said. “That is one of the most important functions of the federal government, whether it is climate change or cancer. It’s how we solve problems. To cut research, and particularly to cut research when you get the feeling that the motivation is that we don’t want to know, is unacceptable. … Congress understands this.”

Read the full story at the Portland Press Herald

West Coast Ocean Acidification Rates Among Highest In World

June 2, 2017 — Carbon emissions aren’t just causing climate change, they’re having a profound effect on ocean chemistry.

Our oceans are becoming more acidic and this is a major threat to fisheries.

Researchers have now recorded some of the highest levels of ocean acidification in the world,  right off the coast of the Pacific Northwest.

When oceans absorb carbon, they become more acidic, preventing oysters and tiny marine snails at the base of the food chain from forming shells.

A new study from Oregon State University documents ocean acidification off the coast of California and Oregon.

“What we didn’t know is that if you’re an animal living on the shore, how often do you see a bad day?” Francis Chan, a lead author, said. “And now because we have sensors that are actually taking a measurement of ocean PH every 10 minutes throughout the summer, we can start to build that picture.”

The study found that while there were persistent hotspots of destructive acid levels, there were also areas that stayed within healthy ranges.

Read the full story at Northwest Public Radio

Gulf of Maine will become too warm for many key fish, report says

May 22, 2017 — A new study by federal fisheries scientists predicts the warming of the Gulf of Maine will cause a dramatic contraction of suitably cool habitat for a range of key commercial fish species there. On the other hand, lobsters are more likely to find hospitable areas.

The study by seven scientists at the National Oceanic and Atmospheric Administration’s Northeast Fisheries Science Center in Woods Hole, Massachusetts, used a high-resolution global climate model and federal fisheries survey data to model how key fisheries species would likely be affected by predicted warming over the next 80 years.

The results confirmed previous research using other models and methods that found that the Gulf of Maine can be expected to become increasingly uncomfortable for many of the cold-loving species that have thrived here for all of recorded history but are at the southern ends of their ranges. Those include cod, haddock, redfish, plaice and pollock.

“The main message here is how important it is to understand the potential magnitude of the changes that you see when you get a finer, higher-resolution view of the implications of changing sea temperatures,” says co-author Michael Fogarty, chief of the ecosystem assessment program at the Northeast Fisheries Science Center.

The scientists caution that the research analyzes just one factor – albeit an important one – the distribution of thermally appropriate habitat for each of 58 species. Their results predict the changes in the amount and location of such habitat but don’t account for many other factors that can influence the future populations of the species themselves, such as what happens to what they eat or what likes to eat them, or how the increasing acidity of the ocean – another product of climate change – will affect each.

Read the full story at the Portland Press Herald