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#1
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Sea bird deaths may forecast grim fishery in the NE Pacific
Excerpts from an article in today's Seattle Time. Author is Lynda
Mapes. Something is killing seabirds. For the thrid winter running, seabirds not usually seen in such near- shore waters have washing up, apparently starved to death, on beaches in California, Oregon, and Washington. And for the third year, scientists say the reasons aren't clear. What they do know is this: The deaths matter. "Birds around the world a re really good indicators of eco-system health," said Bob Emmett, a research fisheries biologist for the National Marine Fisheries SErvice in Newport, Ore. "If the birds aren't doing well, then the salmon won't do well, and the marine mammals won't do well." Researchers for the U.S. Fish and Wildlife Service found 175 dead auklets and 68 dead puffins in a three-day survey late last month at a 10-mile stretch of the Clatsop Spit at the mouth of the Columbia River, according to Roy Lowe, projet leader for the Oregon Coast National Wildlife Refuge Complex. Auklets and puffins also have been found dead on the beaches in Washington's Long Beach in unusually high numbers, Lowe said. The birds were found to have no body fat and empty digestive systems, Lowe said. "When I see dead birds floating ashore, it's kind of a bellwether for what is going on underneath the surface," he added. But exactly what's going on in theocean is not known, said Julia parrish, an associate professor of aquatic and fihseries science at the University of Washington. She said she isn't sure whether it's a result of a fundamental change in the coastal ecosystem or a smaller scale shift in the food supply. "On the one hand the birds are literally screaming at us: 'Something is changed. Something is different. We are not surviving well.' And yet there is no obvious smoking gun," Parrish said. "We seem to be in a period in which the marine enviroment of the Pacific NW is becoming very variable, like a machine that is a little out of kilter." Ocean temperatures have, on average, been warm and the food web has been unproductive during the past three years, said Bill Peterson, an oceanographer with the National Marine Fisheris SErvice. "The birds were stressed at the end of their rope," he said. Still, he said he predicts a turnaround coming in the summer, with colder water that will kick-start the food chain. Shifts in ocean productivity are not new, but scientists say they have been seeing such patterns shift more quickly. Climate change might be one explanation, but they aren;t sure. "One of the predictions of global warming is that it will increase variability," Parrish said. "But these is a lot of inherent variability, and it is hard to draw the signal out of all that noise." |
#2
posted to rec.boats
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Sea bird deaths may forecast grim fishery in the NE Pacific
Climate change might be one explanation, but they aren;t sure.
It's just the convenient blame du jour. |
#3
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Sea bird deaths may forecast grim fishery in the NE Pacific
On Apr 12, 7:09?am, "Bill Kearney" wkearney-99@hot-mail-com wrote:
Climate change might be one explanation, but they aren;t sure. It's just the convenient blame du jour. Nearly every reference to global warming was followed by, "but we don't know for sure", or something similar, so in my opinion it was fairly objective. My informal impression is that the scientists are roughly divided into a bell curve of opinions on this thing. If we examine the bell curve from the (symbolic) left to the (symbolic) right, we begin with one realtively small group that is completely convinced that the climate is indeed changing and that it is due almost entirely to human activity. Moving slightly toward the center is a somewhat larger group that is fairly sure that the climate is changing, and contributes much of the change to human activity. Almost to the middle on the left side is a larger group yet that has observed recent data regarding climate change, has not yet reached a final conclusion, but leans toward the notion that global warming is a reality and recognizes that human activity could be a factor. Just beyond the middle on the right side of the curve is a large group that has observed recent data regarding climate change, has not yet reached a final conclusion, but leans toward a conclusion that if there is any warming of the planet it is likely to be inconsequential. This group is skeptical concerning the ability of man to make any significant impact on the climate. Farther beyond the middle on the right side of the curve is a smaller group that disputes nearly all evidence that the earth is warming, and denounces any theory that changing the mixture of gases in the atmosphere could possibly result in a way that the planet absorbs or retains solar energy. Way out on the right hand edge of the curve is a very small group that insists the climate is not changing at all, that if it ever were to change it couldn't possibly be due, in any degree, to human activities. Some of this group may even insist that the earth is getting progressively colder. I thought the scientists quoted in the article were pretty objective about the global warming possiblity, including the guy who said "It's still pretty difficult to separate a signal from all the available noise". Dead birds with empty bellies and no body fat would have to mean a shortage of bait fish. No bait fish = no salmon. No salmon = no sea lions, orcas, etc. |
#4
posted to rec.boats
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Sea bird deaths may forecast grim fishery in the NE Pacific
Bill Kearney wrote:
Climate change might be one explanation, but they aren;t sure. It's just the convenient blame du jour. "I know the human being and fish can co-exist peacefully." George W. Bush |
#5
posted to rec.boats
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Sea bird deaths may forecast grim fishery in the NE Pacific
"Harry Krause" wrote in message . .. Bill Kearney wrote: Climate change might be one explanation, but they aren;t sure. It's just the convenient blame du jour. "I know the human being and fish can co-exist peacefully." George W. Bush Wonder what "human being" he was refering to? |
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