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Biological Hazard – Unexplained Mass Die-off (Marine Fauna): North Pacific – Bering Sea, Alaska

2016/11/11

DIE-OFF, PUFFIN – USA: (ALASKA) CLIMATE CHANGE  (or Fukushima’s meltdown)?
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Published Date: 2016-11-10 12:15:12
Subject: PRO/AH> Die-off, puffin – USA: (AK) climate change susp
Archive Number: 20161110.4619637

Date: Tuesday, 8 November 2016
Source: National Geographic [edited]

The tufted puffins started washing ashore on St Paul Island [Alaska] in mid-October [2016] — first a handful, then dozens, then so many that volunteers patrolling to collect dead birds began walking their 4-wheelers rather than riding. It was easier than getting off every few feet.

The hundreds of dead, emaciated puffins showing up on this isolated, wind-swept scratch of land in the Pribilof Islands in the middle of the North Pacific suddenly has scientists worried — about the population of this white-masked, orange-beaked seabird, but also about what their deaths may portend for the normally productive Bering Sea.

A stretch of water that provides more seafood than any other in North America saw such record-warm temperatures earlier this year [2016] that scientists suspect the ocean food web there has shifted. That could spell big downturns for marine life, from seabirds and fur seals to salmon, crab, and the USD 1 billion-a-year pollock fishing industry that provides flaky white filets for everything from McDonald’s fish sandwiches to frozen fish sticks.

“The Bering Sea has been off-the-charts warm,” said Nate Mantua, an ecologist at NOAA’s [US National Oceanic and Atmospheric Administration] Southwest Fisheries Science Center in Santa Cruz, California. “We’ve never seen anything like this. We’re in uncharted territory. We’re in the midst of an extraordinary time.”

In the last few years another patch of unusually warm water that settled into the Gulf of Alaska and merged with warm waters in southern California completely transformed the coastal ocean. For months, scientists off Oregon found almost none of the fatty-rich copepods that form the base of the food web. Sea lions, common murres, and Cassin’s auklets died by the thousands because of a lack of food. Scores of whales and sea otters turned up dead in Alaska. The West Coast saw it’s most toxic and longest-lasting harmful algal bloom ever.

But the subarctic waters of the Bering Sea, coming off a strong period of cold water and record sea-ice in 2012 and 2013, seemed mostly spared. Waters were unusually warm beginning in 2014, but not ridiculously so. Last year [2015] would have seen more normal ice, if warm water from the Gulf of Alaska hadn’t poured into the Bering Sea through the Aleutian Island chain and kept the ice at bay.

But all that changed this year [2016]. Even the pool of cold water that normally rests on the bottom of the Bering Sea was at times 6 degrees Celsius warmer than usual. “The maximum summer temperatures in the Bering Sea were the warmest we’ve ever seen,” said Phyllis Stabeno, with NOAA’s Pacific Marine Environmental Lab. “And the minimum temperature — the coldest it gets in winter — was warmer than several of the last years.”

Under normal cycles in the Pacific Ocean, warm water usually translates to less food, and so far that’s what scientists are seeing, especially among the tiny copepods that are food for smaller fish and other animals. But it’s actually worse than normal. “When it’s warm we usually no longer have a lot of large, fatty zooplankton around,” Stabeno said. Instead, the sea usually includes smaller, less nutritious zooplankton. “But this year [2016] there just wasn’t much of anything.”

Said Janet Duffy-Anderson of the Alaska Fisheries Science Center, “That bodes poorly for fish and birds and mammals. It’s that zooplankton prey base that provides food for young pollock that are then eaten by birds and cod and halibut and even older pollock.” That appears to be what has happened with puffins in the remote Pribolofs.

In early October [2016], Lauren Divine, co-director of the ecosystem conservation office for St Paul’s Aleut community, was given 2 dead puffins to take back to Anchorage for research. At the time she though little of it. On this 40-square-mile [103.6 sq km] island, of roughly 500 people, dead birds wash up once in awhile. But within a few days it was obvious something was wrong. “On [17 Oct 2016], we started doing surveys of the 2 main beaches and we came up with about 40 birds that 1st day,” said volunteer Aaron Lestenkof. “Since then it’s been about 20 to 30 birds each time we go out.”

Several hundred birds have now washed up, nearly 200 times the normal rate. And since St Paul and its rocky sister island, St George, are the only land masses anywhere nearby, scientists are certain they’re seeing just a tiny fraction of the deaths. “In 10 years of monitoring, we’ve only seen 6 puffins wash in — total,” said Julia Parrish, a University of Washington professor who coordinates a West Coast volunteer bird-monitoring network. “Now we’ve seen nearly 250 in 20 days. And these islands are small dots in the middle of a huge ocean. The entire puffin population is only 6000 birds, and we project half that many may be affected.”

Parrish said the birds — deep-diving fish eaters that chow on forage fish, such as baby walleye pollock — aren’t sick. Scientists see no evidence of disease. The animals are just in such an advanced state of starvation “they appear to be eating themselves inside out.” Even if she wasn’t already aware of the last 2 years of bird die-off events along the West Coast and Alaska, she said, this is unusual enough to be worrisome.

Puffins have seen trouble before. One year after the unusually warm 2012, Atlantic puffins in the Gulf of Maine suffered their worst reproductive season ever — until this year [2016]. Breeding of puffins in Iceland has been collapsing for a decade. But along the Pacific adults are simply washing up dead.

“Clearly something very weird is going on,” Parrish said. “It’s basically every year now we’re getting some huge mass-mortality event. It seems that the bottom-up changes provoked by the atmosphere are creating massive, massive changes in marine ecosystems. And the forage fish that everything depends on are taking it in the shorts.”

What does that mean for the rest of the creatures in the ocean? “We don’t know,” Parrish said. “The Bering Sea is an incredibly big place, and we’re just seeing this now.” (Learn how puffins are tougher than they look at http://news.nationalgeographic.com/2016/02/150218-atlantic-puffin-winter-migration-mystery/.)

Mantua said the strange behavior in the atmosphere that helped the Gulf of Alaska’s warm “blob” form in 2013 shifted again late this spring [2016], with a high-pressure system setting up over the entire North Pacific. That led to an extended warm period across Alaska from May through September. Then, in October [2016], the patterns changed again, with significant storms in the Gulf of Alaska. But in the Bering Sea wind brought warm air and water from out of the south. “These patterns in the atmosphere are big,” he said. “They span much of the North Pacific and can create warm or cold patches at the same time. But it’s the fact that there has been so much persistence in these patterns that has led to such extraordinary ocean temperatures. That, to me, is the big mystery. We just keep going from one extreme to another. If you get 10 or 12 days that are stuck in the same pattern, then the ocean is going to slowly build up heat.”

Scientists are still grappling with trying to determine how much of this change is likely linked to climate change. Some have argued that melting sea ice has affected the jet stream, causing it to be more wobbly. Others have suggested these strange anomalies are connected to warmth in the tropics but are largely just extreme versions of normal climate fluctuations.

Regardless, for now, marine scientists are planning to spend extra time at sea, trying to assess what all this means for the North Pacific –particularly for Alaska’s fishing industry, which supplies half the nation’s catch of seafood.

[byline: Craig Welch]

communicated by:
ProMED-mail from HealthMap Alerts
<promed@promedmail.org>

[A picture of dead puffins is shown at http://news.nationalgeographic.com/content/dam/news/2016/11/08/puffin-deaths/01-puffin-death.adapt.590.1.jpg.

The impacts of climate change on wildlife health and ecological processes are expected to be more conspicuous at higher latitudes. – Mod.PMB

The state of Alaska and the Pribilof Islands can be located on the maps at https://deadliestreports.files.wordpress.com/2007/06/alaska_map.gif?w=796&h=392 and http://healthmap.org/promed/p/20584. – Sr.Tech.Ed.MJ]

See Also

2013

Puffin die-off – USA: (ME) climate change susp 20130610.1765362

2004

Sea bird die-off – North Sea: climate change impact 20040621.1652
………………………………………….sb/pmb/mj/sh

Source:
A ProMED-mail post
ProMED-mail is a program of the International Society for Infectious Diseases


Biological/Eco-System Hazard – Mass Die-off (Marine Fauna)
North America – North Pacific

By

May 16th, 2016

Nuclear Expert: Largest amount of Fukushima radiation fell on US West Coast and Pacific — “Why don’t we hear complaints from US?”… Officials are criminals and trying to cover it up — Public must be aware even more radiation is coming… “People need to realize impact of contamination on them”

June 22nd, 2016

AP: Officials “admit deadly Fukushima meltdown coverup” — TEPCO President: We lied about meltdowns, “It was a cover-up… This is a grave issue” — “It’s an unprecedented nuclear disaster… about as bad as it gets” — Revealed “unpardonable breach of trust” (VIDEO)

July 7th, 2016

“Like the plot of a summer horror flick”: All along Canada’s Pacific coast, mussels are dying… Bodies are swollen by cancerous tumors — Unprecedented mutations allowing cancer to spread from one species to another like a virus — Scientists: “It’s beyond surprising” (VIDEO)

October 5th, 2015

Time: Bizarre die-off along West Coast “an animal emergency” — Reuters: Record number of deaths declared Unusual Mortality Event by gov’t — Babies being found severely emaciated, sickened by parasites — Experts: “A big warning sign… this is just the tip of the iceberg” (VIDEO)

August 13th, 2015

Giant whales found dead up & down Pacific NW coast, scientists ‘baffled’ over surge — 25+ carcasses reported in past month — Gov’t: “Troubling… Definitely a pulse of deaths” — Experts: “Alarming spike… Exceptionally rare to see a dead humpback” — Concerns about unidentified pathogen (PHOTOS)

August 18th, 2015

Official: “Thousands of Millions” of fish wash up dead in Alaska — Piles of them… I have never seen anything like it… First time we’ve ever heard of this (VIDEO)

August 9th, 2015

Toxic bloom “basically eating the West Coast alive” — “Unusual deaths up and down the Pacific coast” — “All populations of marine mammals are way down” in areas — Experts: “Largest ever recorded… This is really unprecedented territory… Never seen an event like this” (VIDEO)

August 8th, 2015

Die-off of birds all over Alaska beaches, floating in Pacific — “They seem to be starving” — Record-breaking spike in rescues, “such a dramatic increase” — Deformed and abnormal animals reported (PHOTOS & AUDIO

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