Earth Changes
Devastating declines of amphibian species around the world are a sign of a biodiversity disaster larger than just frogs, salamanders and their ilk, according to researchers from the University of California, Berkeley.
In an article published online this week in the journal Proceedings of the National Academy of Sciences, the researchers argue that substantial die-offs of amphibians and other plant and animal species add up to a new mass extinction facing the planet.
"There's no question that we are in a mass extinction spasm right now," said David Wake, professor of integrative biology at UC Berkeley. "Amphibians have been around for about 250 million years. They made it through when the dinosaurs didn't. The fact that they're cutting out now should be a lesson for us."
Flash-floods and landslides since Friday have cut major highway and rail links to the mountainous region bordering southern China. The heavy downpours have also knocked over trees and telephone and electricity lines.
Thousands of troops and disaster relief personnel were using trucks and boats to deliver water, food and medicines to residents in flooded villages, with some people stranded on roofs by the murky waters.
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©NOAA |
NOAA scientists use tags to photograph and identify individual whales. |
Using satellite-linked and underwater listening tags to monitor movement and behavior, NOAA and partnering scientists tagged more than thirty individual marine mammals of four different species. They measured how deep-diving marine mammals feed, interact with one another, dive and respond to sounds in their environment in this pioneering pilot project carried out in conjunction with the Navy's Rim of the Pacific (RIMPAC) 2008 exercises.
Scientists used the naval military exercises, hosted biennially by the U.S. Pacific Fleet, as an opportunity to learn more about deep-diving whales and how they might respond to military sonar in their environment. RIMPAC includes the use of mid-frequency active sonar for anti-submarine warfare training in various areas around Hawaii. Transmissions were not directed at marine mammals for the study. Scientists and the Navy used mitigation measures to minimize exposure to nearby mammals.
Most of the tenants are university students. Ashley Simmons, who lives downstairs in the building, was at work at the time of the strike. The students who live upstairs are away for the summer.
Simmons came home to find her roof in shambles and many of her belongings were drenched.
Rick Sinnott, the area's wildlife biologist, believes it is the same bear that chased a mountain biker earlier this summer and came within inches of harming a cross-country runner in late July. Neither of those people was injured.
Anchorage police say this time the bear caused serious injuries. The woman was bitten on her torso, arm and neck.
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©Isaac Chellman |
A brown tree snake slithers on Guam. |
A variety of other damage has been directly attributed to brown tree snakes, including large population losses among other native animal species in Guam's forests, attacks on children and pets, and electrical power outages.
But new research by University of Washington biologists suggests that indirect impacts might be even farther reaching, possibly changing tree distributions and reducing native tree populations, altering already damaged ecosystems even further.
Paul Henderson, the park's chief of interpretation, said Wall Arch collapsed sometime late Monday or early Tuesday.
There was a magnificent display of lightning on Monday night over much of the southern half of Britain. As the flashes came thick and fast, the West Midlands was hit hard by lightning strikes causing power cuts and fires, while the torrential downpours caused flash floods.
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©Warren Harris |
Wildlife officials haven't been able to find a cause for a mysterious disease that is killing moose on Newfoundland's northern peninsula. |
Saint John - A mysterious disease that has killed a number of moose on Newfoundland's northern peninsula has left provincial wildlife experts in that province scratching their heads. It's unclear how many moose have been lost due to the illness that causes the animals to literally waste away, become walking skeletons and then die.