As the climate warms, these crabs are expected to move up into areas now hosting pristine, defenseless Antarctic communities. Temperatures along the peninsula have already risen by 1 to 2 degrees Celsius during the past half-century. "This is the last stand for pristine marine communities," says Richard Aronson, a marine ecologist at the Dauphin Island Sea Lab on Dauphin Island, Alabama.
Sharks could also soon be on the scene, says Cheryl Wilga, a biologist at the University of Rhode Island in Kingston. Currently, Antarctic oceans are so cold that the metabolism of sharks simply can't deal with the physiological demands. But if the oceans warm by another couple of degrees, she says, sharks would be able to move even farther south, into the waters ringing Antarctica.
| Global Warming Scam News & Views
|
| The Best Global Warming Videos on the Internet
|
"polynyas" very nice word
Sharks could also soon be on the scene, says Cheryl Wilga, a biologist at the University of Rhode Island in Kingston. Currently, Antarctic oceans are so cold that the metabolism of sharks simply can't deal with the physiological demands. But if the oceans warm by another couple of degrees, she says, sharks would be able to move even farther south, into the waters ringing Antarctica.Some biologist, this Cheryl. Sharks can't live in the Antarctic?
Took me about 10 seconds on Google to find this:
http://library.thinkquest.org/CR0215022/sharks.htm
Antarctica: Sharks
There are not a lot of sharks in Antarctica. The only shark that has really been studied a lot is the salmon shark.
The salmon shark has many rows of teeth and a huge jaw. The salmon shark can be brown and white or it can be brownish gray. The salmon shark can grow longer than eleven feet.
Most of the time it stays up towards the top of the water. This amazing shark can swim in bodies of water as low as three feet. At times, the shark stays that shallow because of the types of food it eats. They eat almost anything, including seal, fish, penguins, and other sharks. They even eat sting rays, -- tails and all.
The shark has a dorsal fin on the top of his body. He also has pectoral fins at its side, but it does not use them for steering. Its tail fin, which is the fin that steers his body, sways back and forth.
The salmon shark migrates to the Pacific and Atlantic Ocean but usually stays on the west and north side of Anarctica.