Jun 17 2015

New study shows Arctic Ocean rapidly becoming more corrosive to marine species

artic

Chukchi and Beaufort Seas could become less hospitable to shelled animals by 2030

New research by NOAA, University of Alaska, and Woods Hole Oceanographic Institution in the journal Oceanography shows that surface waters of the Chukchi and Beaufort seas could reach levels of acidity that threaten the ability of animals to build and maintain their shells by 2030, with the Bering Sea reaching this level of acidity by 2044.

“Our research shows that within 15 years, the chemistry of these waters may no longer be saturated with enough calcium carbonate for a number of animals from tiny sea snails to Alaska King crabs to construct and maintain their shells at certain times of the year,” said Jeremy Mathis, an oceanographer at NOAA’s Pacific Marine Environmental Laboratory and lead author. “This change due to ocean acidification would not only affect shell-building animals but could ripple through the marine ecosystem.”

A team of scientists led by Mathis and Jessica Cross from the University of Alaska Fairbanks collected observations on water temperature, salinity and dissolved carbon during two month-long expeditions to the Bering, Chukchi and Beaufort Seas onboard United States Coast Guard cutter Healy in 2011 and 2012.

These data were used to validate a predictive model for the region that calculates the change over time in the amount of calcium and carbonate ions dissolved in seawater, an important indicator of ocean acidification. The model suggests these levels will drop below the current range in 2025 for the Beaufort Sea, 2027 for the Chukchi Sea and 2044 for the Bering Sea. “A key advance of this study was combining the power of field observations with numerical models to better predict the future,” said Scott Doney, a coauthor of the study and a senior scientist at the Woods Hole Oceanographic Institution.

A form of calcium carbonate in the ocean, called aragonite, is used by animals to construct and maintain shells.  When calcium and carbonate ion concentrations slip below tolerable levels, aragonite shells can begin to dissolve, particularly at early life stages.  As the water chemistry slips below the present-day range, which varies by season, shell-building organisms and the fish that depend on these species for food can be affected.

This region is home to some of our nation’s most valuable commercial and subsistence fisheries. NOAA’s latest Fisheries of the United States report estimates that nearly 60 percent of U.S. commercial fisheries landings by weight are harvested in Alaska. These 5.8 billion pounds brought in $1.9 billion in wholesale values or one third of all landings by value in the U.S. in 2013.

The continental shelves of the Bering, Chukchi and Beaufort Seas are especially vulnerable to the effects of ocean acidification because the absorption of human-caused carbon dioxide emissions is not the only process contributing to acidity.  Melting glaciers, upwelling of carbon-dioxide rich deep waters, freshwater input from rivers and the fact that cold water absorbs more carbon dioxide than warmer waters exacerbates ocean acidification in this region.

“The Pacific-Arctic region, because of its vulnerability to ocean acidification, gives us an early glimpse of how the global ocean will respond to increased human-caused carbon dioxide emissions, which are being absorbed by our ocean,” said Mathis. “Increasing our observations in this area will help us develop the environmental information needed by policy makers and industry to address the growing challenges of ocean acidification.”

University of Alaska researcher Jessica Cross tests water samples during Arctic research cruise on USCG cutter Healy. (Mathis/NOAA)
 

The crew lowers sensors that measure water temperature, salinity and dissolved carbon in the Arctic Ocean. (Mathis/NOAA)


Read the original post: http://research.noaa.gov

Jun 15 2015

Kin Khao’s Recipe for Charred Squid in a Chili-Garlic Sauce

Pan-sear tender squid, douse it in a seriously spicy sauce and scatter it with peanuts and cilantro for a simple, striking summer meal. This recipe from Kin Khao in San Francisco offers an accessible intro to authentic Thai cooking

squidHERBAL REMEDY | A scattering of cilantro provides a refreshing counterpoint to the bold spice and pungency of the sauce. Photo: Stephen Kent Johnson for The Wall Street Journal, Food Styling by Heather Meldrom, Prop Styling by Nidia Cueva

AT 31 YEARS OLD, Mike Gaines had mastered classical French and Japanese as well as New California cooking. But when he signed on to help open Kin Khao, a casual Thai eatery in downtown San Francisco, in a sense he was starting all over again. The restaurant’s owner, Pim Techamuanvivit, wasn’t worried: “I knew Mike was an excellent chef,” she said of her plan to introduce him to dishes she’d eaten all her life. “For me,” Mr. Gaines added, “the most difficult part was finding the balance Pim was looking for. When you are dealing with such bold flavors, you have to retrain your palate.”

This recipe for pan-seared squid doused in a bracing vinaigrette and topped with toasted peanuts and fresh cilantro—the pair’s second Slow Food Fast contribution—provides a crash course in authentic Thai cooking. “I insisted that it be kick-you-in-the-face spicy,” Ms. Techamuanvivit said.

The sauce, made with fresh chilies, fish sauce, garlic, lime juice and palm sugar, is known as nam jim talay. “It should be sour, spicy, garlicky and sweet,” said Ms. Techamuanvivit. “Thai cooks use sugar to round things out. If the first thing you taste is sweet, then the sauce is wrong.” She added that though the seafood used in this dish may change according to the season, the toppings never do: “The peanut and cilantro are not just garnishes. They are integral to the dish.”

Both Mr. Gaines and Ms. Techamuanvivit lament the way Thai cooking has been dumbed down in this country. From their modest yet ambitious kitchen, they are working to raise the bar with punchy, fresh and textured dishes like this one. Mr. Gaines compared their efforts to what chefs did a couple of decades ago to increase awareness about regional Italian cooking versus the Americanized pasta and pizza that had become ubiquitous. He was firm on this point: “Thai food is much more nuanced than we think.”

Charred Squid in a Chili-Garlic Sauce

Total Time: 20 minutes Serves: 4

5 cloves garlic, roughly chopped
1½ bird’s eye or other hot chilies, stemmed, seeded and roughly chopped
3 tablespoons palm sugar or light brown sugar
Juice of 1½ limes
5 tablespoons fish sauce
2 tablespoons bran or olive oil
2 pounds whole squid, cleaned
1 cup chopped cilantro
¼ cup toasted and finely chopped peanuts
Cooked sticky or white rice, for serving

1. Use a mortar and pestle or a food processor to crush garlic, chilies and sugar to a coarse paste. Transfer to a small bowl, then stir in lime juice and fish sauce. Set aside.

2. Heat half the oil in a cast-iron or other large, heavy pan over high heat. Once oil is shimmeringhot, sear half the squid, turning frequently, until surface browns on all sides and squid just cooks through, about 3 minutes total. Repeat with remaining oil and squid.

3. Transfer squid to a serving plate and spoon sauce over top. Sprinkle with cilantro and peanuts. Serve with sticky or white rice.


Read original post: www.wsj.com

Jun 12 2015

Update on toxins in seafood

MONTEREY PENINSULA >> A warning issued earlier this month urging consumers not to eat recreationally caught mussels or clams in Monterey and Santa Cruz counties was expanded Tuesday to include the internal organs (viscera) of scallops.

California Department of Health officials say dangerous levels of domoic acid,­ a natural occurrence related to a “bloom” of a particular single-celled plant, ­ have been detected in various sea life.

The department also amended its previous warning for consumers to avoid eating recreationally and commercially harvested finfish, such as anchovy and sardines, which originally stated that the entire body of those fish could be contaminated. Updated information indicates that only the viscera of the fish is affected, and said anchovy and sardines are safe for consumption if de-headed, gutted and thoroughly rinsed.

The warning to avoid consuming the internal organs of commercially or recreationally caught crab taken from Monterey and Santa Cruz counties remains unchanged.

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Originally posted in the Monterey Herald

Jun 12 2015

El Niño continues to build, raising chances of wet winter

Gino Celli inspects wheat nearing harvest in May on his farm near Stockton. Moving to meet voluntary water conservation targets, dozens of farmers in the Sacramento-San Joaquin River Delta submitted plans to the state saying they intend to plant less thirsty crops and leave some fields unplanted amid the relentless California drought, officials said. AP Photo — Rich Pedroncelli

 

In a promising trend that increases the likelihood of steady storms this winter that could ease California’s historic drought, federal scientists on Thursday reported that El Niño conditions in the Pacific Ocean are continuing to grow stronger.

The probability of an El Niño — defined as warmer water at the equator and shifting winds that can bring major weather changes — being present through the end of 2015 is now 85 percent, up from 80 percent last month, and 50 percent three months ago, according to the National Oceanic and Atmospheric Administration.

“The big takeaway is that obviously El Niño has strengthened,” said Mike Halpert, deputy director for NOAA’s climate prediction center in College Park, Maryland.

“We are more confident that it is going to last through the rest of the year, and at this point, we’re slightly favoring a strong event.”

Most important: Trade winds are shifting in ways consistent with prior big El Niños, and sea surface temperatures in the Pacific Ocean near the equator are now 2 degrees Fahrenheit warmer than average in all five zones that El Niño researchers study, a trend not seen since 1997 when a California was hit was drenching rains and floods the following winter.

To be sure, there are still six months before California’s winter rainy season. Many of those are expected to be brutally dry and hot summer months, with high fire risk. And scientists say promising El Niños have fizzled out in the past, most recently last year.

“El Niño is a bad boy, and sometimes he disappoints. He could abandon us at the altar. It’s not a sure thing at this point,” said Bill Patzert, a research scientist and oceanographer at NASA’s Jet Propulsion Laboratory in Pasadena.

“But it’s probably a good idea to clean out the flood control channels in preparation for January.”

 

Water Warning

California water officials have worried that news of a building El Niño could cause state residents to ease off water conservation. That could cause emergency shortages next year if El Niño doesn’t deliver a very wet winter, they note, given the state’s low reservoirs, depleted groundwater, rainfall deficits and non-existent snowpack after four years of historic drought.

“Very few of us would empty our bank accounts today on the hopes of hitting the lottery next winter,” said Doug Carlson, a spokesman for the state Department of Water Resources. “And in the same vein, we can hope for rain, but we have to continue to conserve today.”

In recent months, unusual weather patterns have been linked by some researchers to the growing El Niño in the Pacific.

Two weeks ago, torrential storms battered Texas, killing more than 20 people, sending rivers raging over their banks and trapping thousands of people in flooded cars around Dallas and Houston. On May 25, Houston received a stunning 11 inches of rain in one night. By comparison, San Jose has received 13 inches in the past eight months, and Los Angeles 8 inches over the same time period.

That series of storms, which largely ended an ongoing drought in Texas, was caused when the sub-tropical jet stream moved north from Central America, a condition consistent with strong El Niño conditions, experts say.

“You are seeing flooding in Northern Mexico, which is normally very dry, and extreme drought in Nicaragua, which is normally very wet, which are characteristics of El Niño,” Patzert said.

Researchers stress that not all El Niño years bring big rains to California.

 

Ocean Water

Generally speaking, the warmer the ocean waters are during El Niño years, the greater the likelihood of heavy winter rains in California. During mild El Niño years, when the ocean water is only slightly warmer than historic averages, there are just as many dry winters in California as soaking ones.

Since 1951, there have been six winters with strong El Niño conditions. In four of them, rainfall from the Bay Area to Bakersfield was at least 140 percent of the historic average, according to studies by Saratoga meteorologist Jan Null.

But in the 16 winters since 1951 when there was a weak or moderate El Niño, California experienced below-normal rainfall in six of them, average rainfall in five and above-normal rainfall in the other five.

The term El Niño — or “little boy” in Spanish — was originally used by fishermen off Ecuador and Peru to refer to “the Christ child” because the warming ocean conditions appeared around Christmas every three to eight years.

Typically, El Niños begin when trade winds that normally blow westward, toward Asia, weaken, and then blow the other way. That allows warm ocean water near the equator to spread east, toward South America. Rainfall follows the warm water, which can mean wet winters for California, Peru and other areas, and droughts in Australia.

The opposite, or cooling ocean water, is a “La Niña.”

 

Projections

With each month that draws closer to California’s winter rainy season, forecasts become more reliable.

Currently, an ocean area that scientists call the “3.4 region” along the equator near South America that is considered a key indictor of El Niño trends is 1.2 degrees Celsius, or 2.1 degrees Fahrenheit, above the historic average. That departure from normal is twice what it was a year ago.

And the trend is expected to keep growing.

Supercomputers at NOAA, NASA and other world-leading scientific institutions are projecting the temperatures in that ocean region to hit 1.6 degrees Celsius, or nearly 3 degrees Fahrenheit, on average by September. The last time temperatures there reached that level in a September was in 1997, when they hit 2.3 degrees Celsius, or 4.1 degrees Fahrenheit, above average.

What followed was among the wettest winters in California history, similar to another strong El Niño year, 1982-83, with California receiving twice as much rain as normal. In February 1998, four weeks of storms and powerful winds led to mud slides and widespread flooding that killed 17 people and caused 35 California counties to be declared federal disaster areas from the Napa Valley to the Southern California coast.

“Be careful what you wish for,” said Patzert.


View the original post: www.marinij.com

Jun 12 2015

Why Is This Fisherman Selling Threatened Bluefin Tuna For $2.99 A Pound?

Pacific bluefin tuna for sale for $2.99 per pound at the fish market in San Diego. That shockingly low price does not reflect the deeply threatened state of the bluefin population.

Pacific bluefin tuna for sale for $2.99 per pound at the fish market in San Diego. That shockingly low price does not reflect the deeply threatened state of the bluefin population.

 

Twenty minutes before the San Diego Tuna Harbor Dockside Market was set to open, the line was 75 people deep and starting to curl past the pier. The crowd here last Saturday didn’t come for the local sand dabs or trap-caught black cod. They were bargain hunters looking to score freshly caught, whole Pacific bluefin tuna for the unbelievably low price of only $2.99 a pound.

That’s less per pound for this fish — a delicacy prized for its fatty flesh, whose numbers are rapidly dwindling — than the cost of sliced turkey meat at a supermarket deli.

It’s a low price that doesn’t reflect the true state of Pacific bluefin: Scientists and environmentalists say the species is in deep trouble. According to population estimates, stocks of Pacific bluefin tuna are at historic lows, down 96 percent from the levels they’d be at if they weren’t fished.

But commercial fishermen like David Haworth, who brought this pile of small, steely gray bluefin to market, say that assessment doesn’t match up with what they’re seeing in the water: a record-smashing abundance of Pacific bluefin tuna.

“Our spotter pilots that have been fishing with us for up to 40 years here say they’re seeing the most bluefin they’ve ever seen in their lifetimes, and our government is not documenting any of it,” says Haworth.

Haworth, 52, is the last purse-seine tuna fisherman in San Diego — a city once heralded as the tuna capital of the world. Making a living isn’t easy for commercial fishermen like Haworth. For much of the year he fishes for squid, but El Nino patterns have changed fishery patterns, making squid harder to find. And forget about the sardine fishery — crashing stocks have triggered its closure until 2016.

At the same time, warmer ocean conditions have brought an abundance of bluefin tuna into the region, shifting Haworth’s focus.

Historically, he says, “there was never really a quota on bluefin, and we could go out and catch plenty and sell them. Or we could catch sardines, or mackerel, so we’d have something to do when [ocean] conditions changed” or when the species that Haworth depended on for his income became less reliable. “Now, we’re just so restricted.”

Bluefin tuna has long been listed as a species to “avoid” by influential groups like the Monterey Bay Aquarium’s Seafood Watch program. It’s a warning that many seem to have taken to heart. And it means the higher prices fishermen like Haworth used to count on for bluefin are no longer a sure thing.

Haworth says wholesalers who used to clamor for his bluefin now pass on it, preferring yellowfin tuna instead. Supermarkets and chefs that once eagerly purchased bluefin have pledged not to carry it. Fellow San Diego fisherman Tory Becker tried to sell some of Haworth’s bluefin tuna at a local farmers market last week and was publicly scolded by a customer.

Haworth says that the buyer he had originally lined up for his haul backed out of the sale, then later offered him a mere $1-$2 a pound — too low for him to break even. Instead, he took his catch and headed for San Diego’s fledgling fishers market to sell directly to local foodies.

“If you have a 30-pound fish, and you’re selling it to a consumer for $2.99 a pound, it’s $90 for one fish. I was trying to get to the price point where we’re going to make decent money, but one where every family could come down and grab a fish if they want one,” says Haworth.

But the bounty of bluefin that California fishermen like Haworth report seeing is not what it seems, scientists say.

“It’s a very difficult task to count animals as elusive as tuna,” says Craig Heberer, the West Coast regional coordinator for recreational fisheries for NOAA Fisheries. “The increase in the number of bluefin spotted by Southern California fishermen likely [reflects] a change in the percentage of migrating fish, not the overall population numbers.”

Pacific bluefin off the coast of California and Mexico aren’t counted in current stock assessments. That’s because spawning grounds for Pacific bluefin are located in the western Pacific Ocean, near Japan. Some, but not all, of those fish then migrate to the U.S. West Coast and Mexico to feed. Counting them where they spawn, rather than where only a portion of them migrate, is how regulators say they get the most accurate information.

The migration to the U.S. side of the Pacific happens when bluefin are between 1 and 3 years old, which also explains why the tuna Haworth caught were so small — just 20 to 30 pounds each. They’re technically still juveniles that haven’t had the opportunity to reproduce and help replenish bluefin numbers. Mature Pacific bluefin can reach 1,200 pounds, and don’t typically reproduce until they’re closer to 5 years old. By that point, they would have already migrated back to their spawning grounds on the other side of the Pacific.

Theresa Sinicrope Talley, a coastal specialist with the Scripps Institution of Oceanography in San Diego, says local fishermen like Haworth are simply catching what’s plentiful and pricing it to local demand.

“They’re trying to make this business work. They’re aware,” she says. “They don’t want to harm the environment, either — their livelihood depends upon it.”

“From their perspective,” she says, “they’re abiding by the law.”

In recent years, Haworth and other commercial fisherman in the U.S. have seen the amount of bluefin they’re allowed to catch slashed drastically as part of international agreements. Bluefin were once reliably lucrative for Haworth, but the cuts have affected his ability to make a living, he says. And he feels strongly that in the larger scheme of things, the amount of bluefin he catches is so small, it doesn’t negatively impact global stocks.

“Mexico now has a quota of 6,000 metric tons of fish over two years,” he notes, while the quota for U.S. commercial fishermen is just a tenth of that. “How could our 600 metric tons not be sustainable, when you think about it in the picture of the whole world? We’re only catching 600 tons,” says Haworth.

Haworth says he often feels villainized by environmental groups for fishing for this vulnerable species. But not everyone blames small fishermen like him for declining stock levels. Some are pointing the finger at the very organizations that oversee bluefin fisheries and set the world’s catch limits.

Andre Boustany, a research scientist and bluefin expert at Duke University, faults the agencies that manage the fishery for failing to conduct a full assessment of Pacific bluefin stock until 2012 — “well after massive damage had already been done.”

“While Pacific bluefin tuna are not currently listed as endangered in the U.S., that could change if the stock maintains its current trajectory. And I say that as a scientist that is most definitely not an alarmist,” Boustany says.

The Pew Charitable Trusts plans to call for stronger measures to protect Pacific bluefin later this month, when the Inter-American Tropical Tuna Commission — the agency responsible for setting international catch limits — meets in Ecuador.

“We would disagree that the quotas, as they are currently set, are sustainable,” says Jamie Gibbon, a tuna expert with Pew.

But there’s still hope for the Pacific bluefin — and for fishermen like Haworth. For years its cousin, the Atlantic bluefin, was also experiencing rapidly declining stocks, garnering lots of headlines and hand-wringing. All that attention now seems to be paying off: This year, for the first time since 2006, stocks are healthy enough that catch quotas were actually increased by 20 percent. Gibbon says it’s not too late for the Pacific bluefin, either.

“This is a population that can recover, and can recover in a relatively short amount of time,” he says.


Read the original post: www.kplu.org

Jun 11 2015

Ocean investigators set their sights on Pacific Ocean ‘blob’

 

A huge swath of unusually warm water that has drawn tropical fish and turtles to the normally cool West Coast over the past year has grown to the biggest and longest-lasting ocean temperature anomaly on record, researchers now say, profoundly affecting climate and marine life from Baja California to Alaska.

Researchers remain uncertain what caused the mass of warm seawater they simply call “the blob,” or what it’ll mean long term for the West Coast climate. But they agree it’s imperative to better understand its impact, as it may be linked to everything from California’s drought to record numbers of marine mammals washing up on Northern California shores.

The blob — that’s the technical term — first appeared in late 2013 as a smudge of warm water near Alaska. It then expanded southeast and merged with warm waters farther south, growing into an anomaly that extended from the Aleutian Islands to Baja California and stretched hundreds of miles west toward Hawaii.

“Just the enormous magnitude of this anomaly is what’s incredible,” said Art Miller, an oceanographer at the Scripps Institute of Oceanography in La Jolla. He was among nearly 100 scientists from Canada, the U.S. and Mexico who gathered recently at Scripps for the first time to share research about the warm-water mass.

The warmest ocean temperatures in the blob now are around 5 degrees Fahrenheit above average.A huge swath of unusually warm water that has drawn tropical fish and turtles to the normally cool West Coast over the past year has grown to the biggest and longest-lasting ocean temperature anomaly on record, researchers now say, profoundly affecting climate and marine life from Baja California to Alaska.

Researchers remain uncertain what caused the mass of warm seawater they simply call “the blob,” or what it’ll mean long term for the West Coast climate. But they agree it’s imperative to better understand its impact, as it may be linked to everything from California’s drought to record numbers of marine mammals washing up on Northern California shores.

The blob — that’s the technical term — first appeared in late 2013 as a smudge of warm water near Alaska. It then expanded southeast and merged with warm waters farther south, growing into an anomaly that extended from the Aleutian Islands to Baja California and stretched hundreds of miles west toward Hawaii.

“Just the enormous magnitude of this anomaly is what’s incredible,” said Art Miller, an oceanographer at the Scripps Institute of Oceanography in La Jolla. He was among nearly 100 scientists from Canada, the U.S. and Mexico who gathered recently at Scripps for the first time to share research about the warm-water mass.

The warmest ocean temperatures in the blob now are around 5 degrees Fahrenheit above average.

“They’re just so far off the mean that they’re shocking,” Miller said.

The blob continues to evolve. In the last month, seasonal upwelling of cooler water in Northern California has split it into two separate masses once again. And 2015 is shaping up to be an El Niño year, marked by unseasonably warm waters off the coast of South America. What researchers don’t know is if El Niño will exacerbate or neutralize the blob.

20150610_075433_SJM-OCEANBLOB-0611-90

Researchers agree that unusually slack winds are to blame for the warming ocean off the West Coast, though they don’t know what drove the drop in wind. Stronger winds typically cause deep, cooler water to rise to the surface.

“If you don’t blow the wind as much, you don’t stir the ocean as much,” Miller said. The same mechanism, he said, also may be preventing rainfall from reaching California.

In August, a temperature sensor in Monterey Bay picked up its highest temperature reading ever recorded, said Francisco Chavez, a physical oceanographer at the Monterey Bay Aquarium Research Institute. On land, 2014 was the hottest year on record in California and temperatures remained higher than average until spring of this year.

Less ocean stirring also reduces upwelling of nutrient-rich deep water to the surface, which researchers think is directly related to die-offs in some marine mammals and declines in sardine fisheries. The dearth of nutrients cascades up the food chain through the ecosystem, resulting in less phytoplankton and hungrier sea lions and seals.

A California sea lion pup recovers at The Marine Mammal Center. Researchers say the phenomenon of the so-called 'ocean blob' of unusually warm Pacific Ocean water is causing a decrease in the food available to the pups' mothers, and increasingly, they are abandoning their offspring because they can't feed them. Credit Pat Wilson © The Marine Mammal Center

A California sea lion pup recovers at The Marine Mammal Center. Researchers say the phenomenon of the so-called ‘ocean blob’ of unusually warm Pacific Ocean water is causing a decrease in the food available to the pups’ mothers, and increasingly, they are abandoning their offspring because they can’t feed them. Credit Pat Wilson © The Marine Mammal Center

Sea lion pup Percevero (center) is one of more than 200 patients at The Marine Mammal Center in Sausalito, California. Researchers say the phenomenon of the so-called 'ocean blob' of unusually warm Pacific Ocean water is causing a decrease in the food available to the pups' mothers, and increasingly, they are abandoning their offspring because they can't feed them. Credit © The Marine Mammal Center

Sea lion pup Percevero (center) is one of more than 200 patients at The Marine Mammal Center in Sausalito, California. Researchers say the phenomenon of the so-called ‘ocean blob’ of unusually warm Pacific Ocean water is causing a decrease in the food available to the pups’ mothers, and increasingly, they are abandoning their offspring because they can’t feed them. Credit © The Marine Mammal Center

Volunteers from The Marine Mammal Center release California sea lions at Chimney Rock in Point Reyes National Seashore in 2014. Researchers say the phenomenon of the so-called 'ocean blob' of unusually warm Pacific Ocean water is causing a decrease in the food available to the pups' mothers, and increasingly, they are abandoning their offspring because they can't feed them.Credit Conner Jay © The Marine Mammal Center

Volunteers from The Marine Mammal Center release California sea lions at Chimney Rock in Point Reyes National Seashore in 2014. Researchers say the phenomenon of the so-called ‘ocean blob’ of unusually warm Pacific Ocean water is causing a decrease in the food available to the pups’ mothers, and increasingly, they are abandoning their offspring because they can’t feed them.Credit Conner Jay © The Marine Mammal Center

In 2014, the Marine Mammal Center in Sausalito saw more stranded California sea lions and northern elephant seals than average, according to center marine scientist Tenaya Norris, and record numbers of dying Guadalupe fur seals have washed up so far in 2015. Norris said that only about 60 percent of the mammals they rescue recover enough to be returned to the wild.

This year, sea lion pups in particular are stranding much earlier than usual, a sign that their mothers are abandoning them — an alarming indication that there’s just not enough food in the water.

“It’s a failure on the mothers’ part to adequately provision the pups,” Norris said. “They’ve been successfully foraging for years, so they should be able to find food if it’s out there.”

Paradoxically, Chavez said, 2014 in Monterey Bay was a “bonanza” for many species of birds, dolphins and whales. He hypothesized that nutrient upwelling didn’t disappear; it just shifted into cooler water closer to the coast, condensing an ecosystem that typically stretches tens of miles to only a few miles offshore. It’s unclear, however, whether the warm-water blob has played a role in the unusual number of dead whales — a dozen so far this year — that have washed ashore along Northern California beaches.

With still so many unknowns, the researchers in La Jolla agreed to meet again this coming fall. Until then, they all have homework: run climate models and dig deeper into data for patterns in weather, ocean chemistry and marine life.

“I don’t think that we found the smoking gun at the meeting,” Chavez said.


Read the original story: mercurynews.com

Jun 9 2015

Sea lions not leaving Port of Astoria anytime soon

by Stephanie Yao Long

-ba6e641d3cd95469Click here for:  Photos | Video

 

The saga continues for Port of Astoria officials in what to do with the dozens of sea lions that are lounging around on their docks.

In case you missed it last week, a motorized fiberglass orca was brought down from Bellingham, Washington in an attempt to scare away the barking beasts.

First, mechanical problems halted its use, then it was tipped over in the wake of a passing ship and started taking on water.

The fake orca is gone now, but the sightseeing humans are still flocking to the area to watch the sea lions basking in the sun.

The tolerance for the invaders varies. Some neighbors don’t mind the animals’ noisy communication. Fishermen see the sea lions stealing up to 75% of their catch according to an earlier account.

The Associated Press says:

“Sea lion numbers along the West Coast have grown sharply since they were protected under a 1972 federal law. The sea lions that have been taking over docks at the Port of Astoria are attracted by runs of a fish known as smelt, federal biologists say.”

Officials have tried just about everything to keep the sea lions away — including beach balls, colorful tape, chicken wire and electrified mats.


Read the original post: oregonlive.com

Jun 9 2015

Fake Orca Flops Instead Of Striking Fear In Astoria’s Sea Lions

412226396Boats guide a fiberglass orca into the Port of Astoria’s East Mooring Basin.

The Port of Astoria attempted to scare hundreds of sea lions off its docks Thursday using a motorized orca made of fiberglass. But after a series of mishaps, the experiment went belly up.

Port leaders had high hopes for the fake orca as it pulled into town on a trailer from Bellingham, Washington. A fake baby orca tagged along, lashed onto the roof of an SUV.

It was designed to look like a killer whale but run like a boat, with a motor and a hole on top for a pilot to look out and steer. Everyone was hoping the sea lions would see it as a predator and swim away from the port docks, where they’ve caused major headaches.

But that’s not how things went. John Andersen of Bend watched as the whale eventually had to be towed back to the docks after multiple failures.

“I have seen its motor die. I’ve seen the tow rope snap. I’ve seen the pilot bail out,” he said. “I have seen what looks to me so far to be a major fiasco.”

The effort drew little if any reaction from the barking sea lions, but Port of Astoria Executive Director Jim Knight said he doesn’t see it as a total failure.

“Actually I feel really good because our expectations were pretty low,” he said. “We had no idea whether it would work. What we were really successful at was bringing attention to the problems we have here in Astoria with our friendly, noisy critters that have come to visit us. So, in that sense I’m really glad to have this opportunity and have the rest of the world know what we’re faced with.”

A record of more than 2,000 sea lions piled into the port’s East Mooring Basin this spring. The 800-pound animals have damaged the docks’ infrastructure and even sunk boats that tried to moor there.

The port has tried flagging, electrified pads and even beach balls to scare them off, but to no avail. Knight said he’d like to see what a real orca could do – or at least one that worked better then the one they launched on Thursday. But he suspects whatever effect an orca would have would be temporary.

“They’d probably come back anyway,” he said. “So, we’ve got to find much, much better measures than bringing in imitation orcas. I’m back to trying to find another way to keep them off the docks.”


Read the original post: kuow.org Listen to the audio file.

Jun 4 2015

Recovering predators create new wildlife management challenges

Californiasealion Rookery_SanMiguelIslandCalifornia Sea Lion rookery: Many California sea lion pups at rookeries in the Channel Islands are underweight, NOAA Fisheries researchers found during visits this winter. Credit: NOAA Fisheries/Alaska Fisheries Science Center

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Researchers suggest multi-species approaches to address tensions around rebounding predators
June 4, 2015
Contributed by Michael Milstein
 

The protection and resurgence of major predators such as seals, sea lions and wolves has created new challenges for wildlife managers, including rising conflicts with people, other predators and, in some cases, risks to imperiled species such as endangered salmon and steelhead, a new research paper finds.

The study by scientists from NOAA Fisheries’ Northwest Fisheries Science Center and the University of Washington examines recovering predator populations along the West Coast of the United States and in the Greater Yellowstone ecosystem, and the conflicts surrounding them. The study was published today in the journal Conservation Letters.

In the Pacific Northwest, for example, California sea lions that have increased under the Marine Mammal Protection Act have increasingly preyed on endangered salmon. Wolves reintroduced to Yellowstone in 1995 have since cut into elk herds, reducing human hunting opportunities.

“Increases in predators can be seen as successful in terms of efforts to recover depleted species, but may come at a cost to other recovery efforts or harvest of the predators’ prey,” said Eric Ward, a NOAA Fisheries biologist and coauthor of the paper.

The scientists describe three types of conflicts that can emerge as predators rebound under the protection of the Endangered Species Act and Marine Mammal Protection Act:

Pacific Northwest waters include many such conflicts, largely because many top predators such as sea lions, elephant seals and several whales are increasing in number and prey upon salmon, steelhead, rockfish and other fish protected by the Endangered Species Act.

Conservation conflicts have also emerged elsewhere: On California’s San Clemente Island, a threatened island fox species preys on an endangered shrike, while protected golden eagles prey on both the fox and the shrike. Also in the Pacific Northwest, protected barred owls are moving into forest habitat long important to threatened spotted owls and double-crested cormorants, like sea lions, have been targeted for culling to reduce predation on Columbia River salmon.

The scientists call for improved monitoring and modeling to better anticipate interactions between predators and prey, and assess whether steps to manage predators may be warranted.

Where conflicts continue, the scientists suggest developing multi-species recovery plans that consider the tradeoffs between increasing predators and other protected species.

“Predators such as bears, wolves and whales are charismatic creatures often seen as bellwethers of ecosystem health,” said Kristin Marshall, a postdoctoral researcher at NOAA Fisheries who completed graduate research in Yellowstone and lead author of the paper. “We’re fortunate to have places such as Yellowstone and the Northeast Pacific where they can recover, but in protecting one species you have to be thinking ahead to account for cascading effects that may impact other species too.”

The Endangered Species Act and Marine Mammal Protection Act do recognize larger ecosystem needs. For instance, the first purpose of the Endangered Species Act is “to provide a means whereby the ecosystems upon which endangered species and threatened species depend may be conserved,” and the Marine Mammal Protection Act seeks to “maintain the health and stability of the marine ecosystem.” Both NOAA Fisheries and public land managers in the Yellowstone region are increasingly pursuing ecosystem-based management with those goals in mind. Research has also found ecological benefits from the reintroduction of wolves in Yellowstone.

Both the Endangered Species Act and Marine Mammal Protection Act also provide safety valves by allowing limited control of recovering predators to manage their impacts under certain circumstances.

NOAA Fisheries has authorized states under the Marine Mammal Protection Act to remove sea lions known to be preying on endangered salmon, for instance. An “experimental” designation under the Endangered Species Act allowed for removal of wolves that attacked livestock, although wolves are no longer listed as endangered in Montana and Idaho and are now subject to hunting.

But the scientists note that resolving conflicts by culling predators may itself have unintended consequences and will face public and legal opposition that may limit management options.

“Thirty years ago scientists predicted that increases in predator populations would cause more of these conflicts to emerge,” Ward said. “We’ve largely seen these predictions come true, and there’s no indication of these conflicts decreasing.”


Read original post: http://www.nwfsc.noaa.gov

Jun 4 2015

Global warming may cause largest ocean species migration in 3 million years

Giantshark

 

If greenhouse gas emissions are not curtailed soon, then global warming may bring about the most sweeping re-arrangement of ocean species in at least 3 million years, according to a new study.

The study, published Monday in the journal Nature Climate Change, shows that by the end of the century, the polar regions may be have some of the most abundant and diverse sea life of anywhere on the planet, while the tropics, which are currently the crown jewel of marine species richness, may be drained of much of its iconic marine life.

The stakes involved in which ocean species live where are high since, globally, we depend on proteins derived from fish, crustaceans and mollusks for up to a quarter of our animal protein intake, according to the World Health Organization. In 2010, fish provided more than 2.9 billion people with almost 20% of their intake of animal protein, according to the Marine Stewardship Council, and 4.3 billion people with about 15% of such protein. In some countries, these figures are higher.

The study, which attempts to quantify the shifts in biodiversity that may occur during this century throughout the global ocean, offers a stark warning ahead of global climate talks in Paris in December.

It finds that global warming may not alter the oceans in a profound way if emissions are cut sufficiently to meet the globally agreed upon temperature target of 2 degrees Celsius, or 3.6 degrees Fahrenheit, compared to preindustrial levels. Some policymakers now consider that goal to be nearly impossible, given the continued rise in planet-warming greenhouse gases such as carbon dioxide.

Emissions over next few years determine ocean’s destiny

If warming is held at the 2-degree target, says study co-author Richard Kirby, the changes that will occur throughout the global ocean “will be relatively benign for the ecosystem.” Kirby is affiliated with the Marine Biological Association in the U.K..

Study coauthor Grégory Beaugrand, a senior researcher at an ocean laboratory in Lille, France, and a consultant at the Sir Alister Hardy Foundation for Ocean Science in the U.K., says that tropical regions would see a net loss in biodiversity with average global warming of 2 degrees Celsius, while polar areas could see a 300% increase in biodiversity as species seek out more hospitable areas.

Tuna

A tuna fish swims in the large tank at the Tokyo Sea Life Park in Tokyo on March 25, 2015. Image: TOSHIFUMI KITAMURA/AFP/Getty Images

However, if emissions stay on their current, high path, then in just the span of one century, there could be a larger biodiversity shift than the global oceans saw since the mid-Pliocene period more than 3 million years ago.

This would be a staggering amount of change in such a short time period, which could result in many surprises that scientists don’t yet anticipate. It would also present unprecedented challenges for the fishing industry, which is locally adapted to catching present-day species, including the rapidly-growing global aquaculture industry.

As species migrate toward the poles, fishing fleets will have to be remodeled to hunt for a new mix of species. This has occurred already in Newfoundland and parts of the northeast U.S., where the cod fishery has collapsed, giving way to more of a lobster and crab fishery. This shift is not an easy one to make, since crab fishing requires totally different gear than hunting groundfish species like cod and haddock.

“The transition period will have a devastating impact on fisherman and from a socioeconomic point of view,” Beaugrand told Mashable.

Even a moderate warming that is less than a worst-case scenario could yield a major reorganization of marine biodiversity over large oceanic regions by the 2081-2100 period. These changes may be at least three times greater than the shifts observed between the years 1960-2013, the study found.

Exceeding the 2 degrees Celsius target, Beaugrand said in an interview, would mean that “between 78 and 95% of the ocean will show substantial changes” in biodiversity by the end of the century.

Species are already packing up and heading away from the equator

Unlike terrestrial species, marine creatures can and already are migrating in search of more suitable environments once temperatures exceed their tolerable ranges. This has been seen in several studies of the North Sea in particular, where shifts in the amount and types of plankton and other foraminifera as well as commercially-prized fish have been observed.

In the northeast Atlantic, for example, plankton, which are organisms that produce oxygen through photosynthesis and form the foundation of the marine food web, have already shifted northward by 10 degrees of latitude due in part to ocean temperature increases in that region.

Kirby says that people tend to forget that humans depend on temperature-sensitive organisms as tiny as plankton. “The rest of life on earth lives where the temperature suits it. If that changes, it moves, in sea it tends to move because it can,” he said. “It’s those movements, especially lower down in the food web, that underpin the whole marine food chain upon which we depend.”

Fishing in Somalia
Somalian fisherman carries swordfish on his head from the port to the fish market on the eastern Curubo beach of the Somalian capital city of Mogadishu, on November 24, 2014.

When looking at changes between 1960 and 2013, the study found that 30% of the area of ocean already showed substantial changes in biodiversity, “which is six times higher” than changes due to natural variability alone, Beaugrand said.

“Climate change already has an impact on marine biodiversity,” he says.

A severe global warming scenario featuring continued emissions growth through the end of the century could cause between 50 to 70% of the world’s oceans to experience a change in marine biodiversity comparable or more extensive that those that occurred since the mid-Pliocene and today, as well as since the last glacial maximum — when thick ice sheets covered areas from Washington, D.C., to Seattle and northward.

“It’s really worrying, because this is the whole ocean that will change,” Beaugrand says.

The mid-Pliocene is of interest because it was the last time that climate conditions are thought to have been similar to what is projected for the end of the century. At that time, global carbon dioxide concentrations were about 400 parts per million, which is where it stands now, and global average temperatures were 2 to 3 degrees Celsius (3.6 to 5.4 degrees Fahrenheit) higher than today. Global sea levels were about 66 feet higher than today, as well.

India Daily Life

An Indian fisherman cleans fish in the river Brahmaputra in Gauhati, Assam state, India, Sunday, April 19, 2015. Image: Anupam Nath/Associated Press

The last glacial maximum lasted from about 26,500 to 20,000 years ago. During this time period, the amount of carbon dioxide in the air was just 190 parts per million, according to the study, and the average sea level was 425 feet below current levels.

Between the last glacial maximum and today, about 85% of the global ocean area showed substantial modification in marine biodiversity, Beaugrand said, while between the mid-Pliocene and today, 75% of the global ocean showed substantial changes. Yet this all played out over thousands to millions of years, not in just a century, which is the timeline we’re looking at with regards to manmade global warming.

In other words, there’s no precedent in all of human history for what may be about to happen, which is extraordinarily risky given that we depend on the oceans for ecosystem services from food to oxygen production and heat storage.

Generating ‘pseudo species’

The study used a theoretical model that relies upon fundamental ecological principles and previously known findings of how biodiversity changes with temperature fluctuations to come up with, essentially, “pseudo marine communities,” as the study refers to them. The authors compared the modeled biodiversity patterns to observed patterns based on previous studies, and found that there was a statistically significant amount of agreement.

The study allowed tens of thousands of modeled species, each with different biological properties including temperature ranges, to colonize the ocean. The researchers used data from deep sea sediment cores to look at how plankton groups have changed through time in order to fine-tune their modeling results.

One drawback to this study, as well as others that focus on global ocean species, is that we know more about Mars than we do about much of the ocean. So far, Beaugrand says, we’ve only described the characteristics of about 200,000 marine species, which is about 10% of the marine biodiversity that scientists think is out there. We have an incomplete knowledge of marine biology and spatial distribution — that could limit the reliability of studies like this to some extent.

Another wild card is exactly how ocean acidification, which is also caused by climate change, will alter marine biodiversity and functioning of marine ecosystems. Such studies are currently in their infancy.


Read the original post: www.mashable.com