Devastating declines of amphibian species around the world are a sign of a biodiversity disaster larger than just the deaths of frogs and salamanders, University of California, Berkeley scientists said Tuesday.
Researchers said substantial die-offs of amphibians and other plant and animal species add up to a new mass extinction facing the planet, the scientists said in an online article this week in the journal Proceedings of the National Academy of Sciences.
“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.”
New species arise and old species die off all the time, but sometimes the extinction numbers far outweigh the emergence of new species, scientists said.
Extreme cases of this are called mass extinction events. There have been only five in our planet’s history, until now, scientists said.
(via Cryptogon)
August 13, 2008 at 5:25 pm
“New species arise and old species die off all the time, but sometimes the extinction numbers far outweigh the emergence of new species, scientists said.”
Apples and oranges. The last of a species dying off is a finite event, emergence of new species never stops occuring as a slow process within existing species.