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Grizzly bears, black bears, wolves, coyotes, cougars/ mountain lions,bobcats, wolverines, lynx, foxes, fishers and martens are the suite of carnivores that originally inhabited North America after the Pleistocene extinctions. This site invites research, commentary, point/counterpoint on that suite of native animals (predator and prey) that inhabited The Americas circa 1500-at the initial point of European exploration and subsequent colonization. Landscape ecology, journal accounts of explorers and frontiersmen, genetic evaluations of museum animals, peer reviewed 20th and 21st century research on various aspects of our "Wild America" as well as subjective commentary from expert and layman alike. All of the above being revealed and discussed with the underlying goal of one day seeing our Continent rewilded.....Where big enough swaths of open space exist with connective corridors to other large forest, meadow, mountain, valley, prairie, desert and chaparral wildlands.....Thereby enabling all of our historic fauna, including man, to live in a sustainable and healthy environment. - Blogger Rick

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Wednesday, February 6, 2013

"Rapid ecosystem change and polar bear conservation" is the title of a paper that U. of Alberta Professor Andrew Derocher and colleagues just published calling for Arctic Countries to create a worst case scneario plan for the preservation of Polar Bears.............Inevitable that the Arctic is warming at rapid rates and that the reduction in the ice packs is already having adverse impact on the Bears ability to hunt seals...........Derocher is not dictating policy to Countries, just telling them to get off their duffs and not wait for an extinction endgame to be on their front door.........

 A University of Alberta polar bear researcher and 11 international co-authors are urging governments to start planning for rapid Arctic ecosystem change to deal with a climate change catastrophe for the animals.--Science Daily

U of A professor Andrew Derocher co-wrote a policy perspective urging governments with polar bear populations to accept that just one unexpected jump in Arctic warming trends could send some polar bear populations into a precipitous decline.

"It's a fact that early sea ice breakup, late ice freeze-up and the overall reduction in ice pack are taking their toll," said Derocher. "We want governments to be ready with conservation and management plans for polar bears when a worst-case climate change scenario happens."
The effects of climate change on polar bears are clear from both observational and modelling studies in many areas where the bears are found. Earlier studies by Derocher and his colleagues show that one very bad ice year could leave hundreds of Hudson Bay polar bears stranded on land for an extended period. "Such an event could erase half of a population in a single year," Derocher noted.

"The management options for northern communities like Churchill would range from doing nothing, to feeding the bears, moving them somewhere else or euthanizing them," said Derocher.

The concerned researchers say they're not telling governments what to do. But they want policy makers and wildlife managers to start planning for both the predicted escalation of Arctic warming and for an off-the-charts, worst-case scenario."You're going to make better decisions if you have time to think about it in advance; it's a no-brainer," said Derocher, adding that "consultation with northern residents takes time and the worst time to ask for input is during a crisis."

The researchers say the options for polar bear management include what Derocher calls a "wild bear park model" -- feeding and releasing the bears when freeze-ups allow the animals to get to their hunting grounds. But the paper reports that the cost could run into the millions and could have ramifications for the animals' long-term behaviour.

The authors of the paper say governments should be aware of the fallout from climate change, and human safety in the North is going to be an increasing challenge.

"Around the world, polar bears are an iconic symbol, so any tragedy would produce massive attention," said Derocher. "If the warming trend around Hudson Bay took an upward spike, the population of 900 to 1,000 bears in western Hudson Bay would be on the line, so there has to be a plan."

The paper, titled "Rapid ecosystem change and polar bear conservation," was published online as an accepted article Jan. 25 in the journal Conservation Letters.

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