发表于 2005/5/25 10:19:00
Climate change over the next 50 years will throw delicate ecosystems off balance, reduce the geographical range of many species and bring new predators and prey together, scientists said on Wednesday. Fewer species than expected will become extinct but their distribution could be radically different in the years to come, which will have unpredicatable results for humans. "This is important because the modifications affecting our climate are like a big experiment the world is doing without knowing what''s going on happen.”said A. Townsend Peterson, of the University of Kansas Natural History Museum and Biodiversity Research Center. Townsend and his Kansas colleagues and scientists in Mexico and California produced a new model of climate change based on an analysis of its impact on more than 1,800 species of mammals, birds and butterflies in Mexico.