Tag Archives: Lobsters

Climate Change May Be Creating A Seafood Trade War, Too

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June 15th, 2018, Marshall Shepherd, Forbes.com

One of the grand challenges that I find as a climate scientist is conveying to the public the “here and now” of climate change. For many people, it is still some “thing” that seems far off in time or distance from their daily lives of bills, illness, kids, and their jobs. Ironically, climate change touches each of those aspects, but the average person does not often make the connections. People eat seafood and fish, but most people will not make any connections between tonight’s dinner of flounder, lobster or mackerel to climate change as they squeeze that lemon or draw that butter.

A new Rugters University study caught my eye because it is a good example of a “here and now” impact. Climate changes is causing fish species to adjust their habitats at a more rapid pace than current policy can manage. Many species of flounder, lobster, mackerel and crab are migrating to find colder waters as oceans warm.  The study suggests that such shifts may lead to international conflict and reductions in fish supply. Seafood is a pawn in the trade chess game.

NOAA

Fishers on deck

Researchers at Rutgers University say that an obsolete and outdated regulatory system has not kept pace with how the ocean’s waters are warming and shifting fish populations. I actually wrote a few years ago in Forbes about how warming waters were shifting crab populations in the North Pacific and affecting fishers as well as one of my favorite TV shows, The Deadliest Catch. This new study published in one of the top scientific journals in the world, Science, has provided new insight that has implications for our food supply and potential international conflict. According to a press release from the university:

for the first time that new fisheries are likely to appear in more than 70 countries all over the world as a result of climate change. History has shown that newly shared fisheries often spark conflict among nations. Conflict leads to overfishing, which reduces the food, profit and employment fisheries can provide, and can also fracture international relations in other areas beyond fisheries. A future with lower greenhouse gas emissions, like the targets under the 2015 Paris climate agreement, would reduce the potential for conflict, the study says.

Malin Pinsky is an assistant professor of ecology, evolution and natural resources at Rutgers and one of the authors of the study. He, postdoctoral associate James Morley and a group of international co-authors reported that commercially important fish species (in other words things you like to eat and that many depend on for sustenance) could continue to migrate further northward in search of colder waters.

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Scientists Warn of Dangers from Ocean Acidification

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By Stefanie Veneziano, Maine House Democratic Office, August 17, 2014, Boothbay Register
Maine is the first state on the East Coast to address threat to coastal environment, jobs

Rep. Mick Devin, left, with Dr. Scott Doney, chairman, Department of the Marine Chemistry & Geochemistry and Director WHOI Ocean and Climate Change Institute. Courtesy of Stefanie Veneziano

The future of Maine’s coastal economy is uncertain as the state’s most valuable fisheries are at risk. Scientists, legislators and others concerned with coastal ecosystems discussed the threats of changing ocean chemistry before the first meeting of the new ocean acidification commission on Friday at the University of Maine Darling Marine Center in Walpole.

Ten scientists addressed the different factors causing ocean acidification and how it affects marine ecosystems during the morning session of the meeting. If left unchecked, ocean acidification could cause major losses to shellfisheries like clams, oysters, lobsters, shrimp and sea urchins and put at risk thousands of jobs and billions of dollars to the state’s economy.

“Ocean acidification is happening all over the world but nowhere are its potential impacts greater than in Maine,” said Dr. Bob Steneck, a professor at the School of Marine Sciences and Pew Fellow in Marine Conservation. “Our coastal ecosystem and marine resources are most at risk.”

Steneck discussed how ocean acidification may be especially problematic for Maine’s marine resources and how certain factors could locally reduce its effects. He pointed out that over 75 percent of the value of Maine’s marine resources comes from animals with limestone shells, such as lobsters, crabs, sea urchins, clams, oysters, scallops and mussels.

As Maine has the highest lobster population density in the world, the lobster industry is also at risk of ocean acidification’s effects.

Dr. Rick Wahle from the Darling Marine Center addressed how ocean acidification might affect the lobster industry, one of Maine’s major economic drivers. Wahle said that the future of Maine’s coastal economy is far from certain because different species respond to chemistry changes.

“In the wake of depleted fisheries over the past few decades, Maine’s coastal economy is now perilously dependent on the lobster fishery,” said Wahle. “We need to understand ocean acidification in the context of the other stressors facing our fisheries in the coming decades.”

The Commission to Study the Effects of Coastal and Ocean Acidification on Commercially Harvested and Grown Species will study the negative effects of ocean acidification on the ecosystem and major inshore shellfisheries and make recommendations to the Legislature on how to address the threat.

Rep. Mick Devin, D-Newcastle, introduced the law to establish the commission, which is the first of its kind on the East Coast.

“I’m glad that we’re moving in the direction of addressing this issue,” said Devin, who works as a hatchery manager at the Darling Marine Center. “Ocean acidification is a major threat to thousands of jobs in our state and the marine economy.”

State Sen. Chris Johnson, D-Lincoln, said that it is important for commission members to have a full understanding of the facts as they consider what Maine can do about changing ocean chemistry.

“Ocean acidification is a critical threat to Maine’s marine resources and coastal communities,” said Johnson, Senate co-chairman of the commission. “I am pleased that we are kicking off our meetings with briefings from nationally and internationally recognized scientists, some of whom are doing their research right here on the coast of Maine.”

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Gulf of Maine Uniquely Susceptible to Ocean Acidification

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The Working Waterfont, May 21, 2014. By Heather Deese and Susie Arnold

A recent study led by Aleck Wang, a chemical oceanographer from Woods Hole Oceanographic Institution, has identified the Gulf of Maine as outstanding in an unfortunate way—more susceptible to pressures of ocean acidification than any other region along the eastern seaboard and Gulf of Mexico.

oysters, maine.Ocean acidification may not be a familiar term for many, but it is a critically important aspect of ocean chemistry for all of us to understand.

Ocean acidification is the changing chemistry of seawater caused by the ocean’s absorption of carbon dioxide (CO2). As CO2 is absorbed into seawater, the resulting reactions decrease the availability of carbonate ions, which are critical building blocks for forming the shells and skeletons of many marine organisms. The process also increases the number of hydrogen ions, which leads to lower pH and greater acidity. Toxic chemicals from storm water, industrial pollution and other runoff that flows into the ocean also can contribute to acidification of coastal waters.

Wang and his colleagues think the Gulf of Maine’s susceptibility may be due to a few different factors. Fresh and cold water holds more CO2, and the Gulf of Maine has a lot of colder and fresher water coming in from the Labrador Current, in addition to a large proportion of fresh water from rivers. Also, the semi-enclosed shape of the Gulf tends to hold this more acidic water.

Around the same time this study came out, researchers in Alaska published disturbing results on the impacts of ocean acidification on Red King Crab and Tanner crabs. Their laboratory studies showed decreased survival and growth in low pH water in both species and 100 percent mortality of Red King Crab larvae after 95 days in acidification scenarios predicted for the end of this century.

A few months later, a scallop aquaculture operation in British Colombia appeared to become the latest commercial victim of ocean acidification with a massive die-off.

Oyster aquaculturists on the West Coast have been responding to die-offs for nearly ten years and within the last several years their onsite pH monitoring has confirmed the link to acidification. Upwelling conditions in the Pacific Northwest, which bring cold water to the surface, tend to have lower pH than surface water. The pH of this water has decreased further in recent decades due to increasing atmospheric CO2 and pollutants that run from the land into the ocean.

Rep. Mick Devin, D-Newcastle, who also is a marine biologist at the University of Maine’s Darling Marine Center, has been concerned about the vulnerability of Maine’s marine ecosystems and fisheries-dependent communities to this unfolding threat. Last fall, he proposed LD 1602, which would establish a commission to study the effects of coastal and ocean acidification on species that are commercially harvested and grown along the Maine coast.

Thanks to support from diverse interest groups, including fishing and aquaculture industries, coastal community members, environmental groups, state agencies and others, the bill became law April 30.

Scientists still don’t know exactly how changing chemistry will impact the various life stages of most marine organisms, particularly a lot of commercially important species. For example, there is still very little known about the possible impacts on lobsters.

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Lawmakers Pass East Coast’s First Ocean Acidification Bill

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Maine Insights, By Ramona Du Houx, April 18th, 2014

The Legislature on Thursday passed the East Coast’s first bill to address the threat of ocean acidification as the Senate gave the measure its final approval with a vote of 33-0. The bill, LD 1602, now goes to Gov. Paul LePage.

“Maine has the opportunity to lead on this issue,” said Rep. Mick Devin, the bill’s sponsor and a marine biologist. “The overwhelming support for my bill shows that Maine understands that ocean acidification is a real problem. It poses a threat to our coastal environment and the jobs that depend on it. We must address this threat head-on.”

The measure would establish a commission to study and address the negative effects of ocean acidification on the ecosystem and major inshore shellfisheries. The committee membership would be made up of stakeholders including fishermen, aquaculturists, scientists and legislators.

Rising levels of carbon dioxide from fossil fuel use are causing changes in ocean chemistry. As carbon dioxide and seawater combine, carbonic acid forms. Carbonic acid can dissolve the shells of shellfish, an important commercial marine resource. Over the past two centuries, ocean acidity levels have increased 30 percent.

If left unchecked, ocean acidification could cause major losses to shellfisheries like clams, oysters, lobsters, shrimp and sea urchins and put at risk thousands of jobs and billions of dollars to the state’s economy.

Shellfish hatcheries on the West Coast have failed in recent years due to 60 to 80 percent production losses caused by ocean chemistry changes, which can take place quickly. A 2007 study by the National Oceanic and Atmospheric Administration discovered changes in ocean chemistry not expected for another 50 to 100 years on the West Coast.

Devin’s bill is one of the key legislative issues of the Environmental Priorities Coalition this year. The coalition cited research that found the Gulf of Maine is more susceptible to the effects of ocean acidification than other parts of the East Coast.

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