Traces Of Fukushima Radioactivity Detected In West Coast Waters

By Tom Banse, Northwest News Network

An oceanography institute announced today (Monday) that trace amounts of radioactivity from Fukushima have been detected off the West Coast. This stems from the 2011 nuclear plant accident in Japan.

Radiation experts say the very low levels of radioactivity measured do not pose a health threat here.

The post-earthquake and tsunami nuke plant accident spilled a large amount of radioactive contamination into the Pacific three years ago. Oceanographers projected that it would take until this year for highly diluted traces to reach the West Coast of North America. And a recent research cruise from Dutch Harbor, Alaska to Eureka, California detected the front edge of the plume multiple times between 100 and 1,000 miles offshore. Ken Buesseler is a senior scientist at the Woods Hole Oceanographic Institution.

“The levels offshore still are quite low. So by that I mean they are a couple units of these Becquerels per cubic meter, something that is about a thousand times less than a drinking water standard,” he said.

Buesseler said he is reluctant to “trivialize” any amount of radiation, but says he personally has no concerns about swimming, boating or eating fish from local waters.

Since the start of this year, Buesseler’s lab has also tested about 50 seawater samples collected at the shore by concerned coastal residents from California to Alaska. All of those results have come up negative. This sampling was paid for through crowdfunding as part of an ongoing “citizen science” monitoring project initiated by Buesseler.

A parallel but independent monitoring effort run through the radiation health lab at Oregon State University found no detectable traces of Fukushima radiation in seawater samples collected earlier this year in near shore waters along the Pacific Northwest coast.

Scientists tracking the plume from Japan look for a short-lived cesium isotope, cesium-134, that serves as the “fingerprint” of Fukushima contamination.

For context, radioecologist Delvan Neville at OSU said it helps to know that the cesium-134 levels reported by the Woods Hole researcher are “much less than the natural background radiation in seawater.” In an interview, Neville was certain the low levels of Fukushima-derived isotopes detected in the northeastern Pacific do not pose an environmental or human health radiological threat.

Buesseler is scheduled to present his findings Thursday during the annual meeting of the Society of Environmental Toxicology and Chemistry in Vancouver, Canada.

He is also responding to questions from the public on the “Ask Me Anything” forum on Reddit at 10 a.m. PST Monday.

The results Buesseler reported corroborate detections of cesium-134 in seawater far offshore from Vancouver Island starting last year. Scientists from Fisheries and Oceans Canada, Health Canada and the University of Victoria are collaborating on a monitoring effort that also includes fish sampling.

None of the salmon, halibut, sablefish and spiny dogfish they have analyzed have contained detectable levels of radiation traceable to Fukushima.

This was first reported for the Northwest News Network.

 

Dying Starfish Could Get Help From Congress

West coast sea stars are dying by the millions from a mysterious disease. | credit: Katie Campbell
West coast sea stars are dying by the millions from a mysterious disease. | credit: Katie Campbell

 

By Katie Campbell, KCTS9

 

WASHINGTON, D.C. — Researchers have been scrambling for more than a year to make sense of a strange disease that’s causing West Coast starfish to die by the millions.

Now it looks like help could be coming from Congress.

U.S. Rep. Denny Heck from Olympia introduced a bill Thursday that would dedicate federal funds for researching the epidemic, which has now spread along North America’s Pacific coast from Alaska to Mexico and in some places on the East Coast as well.

The disease has hit more than 20 species of West Coast starfish. Scientists are calling it the largest marine disease outbreak ever recorded.

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Drew Harvell, a marine epidemiologist at Cornell University, has been studying the outbreaks in Puget Sound and is leading nationwide efforts to understand the epidemic. She says this legislation is critical because tracking marine disease outbreaks is so challenging.

“Disease outbreaks — they’re like lightning strikes. They occur unpredictably and rapidly,” Harvell says. “To identify their causative microorganisms or stop them from spreading requires significant scientific investigations on really short notice.”

The proposed legislation would establish a plan for declaring and responding to the sea star disease outbreaks as well as future marine disease emergencies.

Harvell says increased funding could speed up the search for what’s causing the disease and for ways to prevent starfish from permanently vanishing from North American coastlines.

“It will allow scientists like me to leverage rapid funding and come up with proactive measures to protect our valuable marine fisheries and biodiversity,” Harvell says.

Sardine crash raising alarms; experts warn of peril if populations of the oily fish don’t recover soon

By TONY BARBOZA, Los Angeles Times, January 9, 2014

Read more here: http://www.theolympian.com/2014/01/09/2921922/sardine-crash-raising-alarms-experts.html#storylink=cpy

LOS ANGELES — The sardine fishing boat Eileen motored slowly through moonlit waters from San Pedro to Santa Catalina Island, its weary-eyed captain growing more desperate as the night wore on. After 12 hours and $1,000 worth of fuel, Corbin Hanson and his crew returned to port without a single fish.

“Tonight’s pretty reflective of how things have been going,” Hanson said. “Not very well.”

To blame is the biggest sardine crash in generations, which has made schools of the small, silvery fish a rarity on the West Coast. The decline has prompted steep cuts in the amount fishermen are allowed to catch, and scientists say the effects are probably radiating throughout the ecosystem, starving brown pelicans, sea lions and other predators that rely on the oily, energy-rich fish for food.

If sardines don’t recover soon, experts warn, the West Coast’s marine mammals, seabirds and fishermen could suffer for years.

The reason for the drop is unclear. Sardine populations are famously volatile, but the decline is the steepest since the collapse of the sardine fishery in the mid-20th century. And their numbers are projected to keep sliding.

One factor is a naturally occurring climate cycle known as the Pacific Decadal Oscillation, which in recent years has brought cold, nutrient-rich water to the West Coast. While those conditions have brought a boom in some species, such as market squid, they have repelled sardines.

If nature is responsible for the decline, history shows the fish will bounce back when ocean conditions improve. But without a full understanding of the causes, the crash is raising alarm.

An assessment last fall found the population had dropped 72 percent since its last peak in 2006. Spawning has taken a dive too.

In November, federal fishery managers slashed harvest limits by more than two-thirds, but some environmental groups have argued the catch should be halted outright.

“We shouldn’t be harvesting sardines any time the population is this low,” said Geoff Shester, California program director for the conservation group Oceana, which contends that continuing to fish for them could speed their decline and arrest any recovery.

The Pacific sardine is the ocean’s quintessential boom-bust fish. It is short-lived and prolific, and its numbers are wildly unpredictable, surging up and down in decades-long cycles in response to natural shifts in the ocean environment. When conditions are poor, sardine populations plunge. When seas are favorable, they flourish in massive schools.

It was one of those seemingly inexhaustible swells that propelled California’s sardine fishery to a zenith in the 1940s. Aggressive pursuit of the species transformed Monterey into one of the world’s top fishing ports.

And then it collapsed.

By mid-century sardines had practically vanished, and in the 1960s California established a moratorium on sardine fishing that lasted 18 years. The population rebounded in the 1980s and fishing resumed, but never at the level of its heyday.

Since the 1940s scientists have debated how much of the collapse was caused by ocean conditions and how much by overfishing. Now, researchers are posing the same question.

“It’s a terribly difficult scientific problem,” said Russ Vetter, director of the Fisheries Resources Division at NOAA’s Southwest Fisheries Science Center.

Separate sardine populations off Japan, Peru and Chile fluctuate in the same 50- to 70-year climate cycle but have been more heavily exploited, Vetter said. West Coast sardines are considered one of the most cautiously fished stocks in the world, a practice that could explain why their latest rebound lasted as long as it did. The West Coast’s last sardine decline began in 1999, but the population shot back up by the mid-2000s.

In recent years scientists have gained a deeper understanding of sardines’ value as “forage fish,” small but nutrition-packed species such as herring and market squid that form the core of the ocean food web, funneling energy upward by eating tiny plankton and being preyed on by big fish, seabirds, seals and whales.

Now, they say, there is evidence some ocean predators are starving without sardines. Scarcity of prey is the leading theory behind the 1,600 malnourished sea lion pups that washed up along beaches from Santa Barbara to San Diego in early 2013, said Sharon Melin, a wildlife biologist at the National Marine Fisheries Service.

Melin’s research indicates that nursing sea lion mothers could not find fatty sardines, so they fed on less nutritious market squid, rockfish and hake and produced less milk for their young in 2012. The following year their pups showed up on the coast in overwhelming numbers, stranded and emaciated.

“We are likely to see more local events like this if sardines disappear or redistribute along the coast and into deeper water,” said Selina Heppell, a fisheries ecologist at Oregon State University.

Biologists also suspect the drop is hurting brown pelicans that breed on California’s northern Channel Islands. The seabirds, which scoop up sardines close to the ocean surface, have shown signs of starvation and have largely failed to breed or rear chicks there since 2010.

Brown pelicans were listed as endangered in 1970 after they were pushed nearly to extinction by DDT, which thinned their eggshells. They were taken off the list in 2009 and now number about 150,000 along the West Coast.

Though pelicans have had more success recently in Mexico, where about 90 percent of the population breeds, environmental groups think the lack of food at the northern end of their range could threaten the species’ recovery.

Normally, pelicans and sea lions would adapt by instead gobbling up anchovies. But aside from an unusual boom in Monterey Bay, anchovy numbers are depressed too.

“That does not bode well for everything in the ocean that relies on sardines to get big and fat and healthy,” said Steve Marx, policy analyst for the Pew Charitable Trusts, a nonprofit that advocates for ecosystem-based management of fisheries.

Fishermen also attest to the scarcity.

The West Coast sardine catch oscillates with the market and was valued at $14.5 million in 2013, according to the National Marine Fisheries Service. But California fishermen pulled in just $1.5 million worth of sardines last year, preliminary data from state Department of Fish and Wildlife show.

Just a few years ago, Hanson, the sardine captain, didn’t have to travel far from port to pull in nets bulging with sardines.

Not anymore. If his crew catches sardines these days, they are larger, older fish that are mostly shipped overseas and ground up for pet or fish food. Largely absent are the small and valuable young fish that can be sold for bait or canned and eaten.

Still, when he embarked for Catalina Island on a December evening, Hanson tried to stay optimistic. “We’re going to get a lot of fish tonight,” he told a fellow sardine boat over the radio.

After hours of cruising the island’s shallow waters, the voice of another boat captain lamented over the radio, “I haven’t seen a scratch.”

So the Eileen and other boats made an about-face for the Orange County coast, hoping to net sardines in their usual hideouts.

No such luck.

By daybreak, Hanson was piloting the hulking boat back to the docks with nothing in its holds.

Read more here: http://www.theolympian.com/2014/01/09/2921922/sardine-crash-raising-alarms-experts.html#storylink=cpy