Friday, December 26, 2008
Less ice at the North Pole accelerates global warming. Scientist predict that the North-West Passage will be completely ice free during summer within four years (so 2012 - worth noting in a diary). It's a barometer of global warming. A bit like the polar bear. We measure how warm it is getting by examining things that are cold, or at least once were.
Tuesday, December 23, 2008
The red-eared slider turtle is now established in Queensland, and one was recently caught in Blackburn Lake. They have no known natural predators and prey aggressively on native fish and frogs, and reduce the food available to native predators. They can breed prolifically laying up to 70 eggs a year. The species are in the World Conservation Unions top 100 "world's worst invaders" list. What dill brought it in and why?
We seem to be heading for fewer species in larger numbers, a bit like the book trade. The weedy and aggressive survive.