الجمعة، 28 يناير 2011

White-nose syndrome in bats

Tom Kunz has been studying bats throughout New England for more than four decades... During trips to bat hibernacula—the bats’ winter hideouts—he grew accustomed to cave walls covered in huddled masses of bats, tens of thousands strong. Aeolus Cave in Vermont, the largest bat hibernaculum in the northeast, has long been a winter home for more than 100,000 bats....

Two years ago, a new, potent fungus was found rampaging through New York, Vermont and Pennsylvania, wiping out entire colonies of bats Kunz had studied since the Johnson administration. He and a group of graduate students visited Aeolus in January 2009 and were appalled at what they saw: Tracks in the snow made by crawling, starved bats; birds eviscerating bat carcasses outside the cave entrance; bats frozen into ice stalagmites, having died while trying to climb to higher ground; and a cave carpeted in bat bones.

“You couldn’t step on the cave floor the last two winters without walking on dead bats. It was just horrible,” Kunz said. “I’m not an emotional person, but I was in tears when I saw this ... it’s just devastating. It’s unprecedented in the annals of science.”...

Since 2006, about a million bats in the northeastern United States have died during hibernation. The culprit is white-nose syndrome (WNS), caused by a fungus called Geomyces destructans that biologists believe arrived from Europe. The bats awaken every few days, burning their precious fat reserves; ultimately, they freeze, starve to death or are picked off by opportunistic predators....
Further details at this PopSci article and at this one.
Blehert said that because the disease does not spread to humans, getting the public to care means educating them about the value of bats and the potential loss of creatures that are an important part of the ecosystem.
Consider this: one little brown bat can eat 600 mosquitoes in an hour.

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