Paleoecologist Anthony Barnosky excavating ice age fossils from a cave in 2008. From studies of fossil ecosystems, he says, we know that the extreme and fast global warming we’re now experiencing is far outside the range of normal climate changes.
BERKELEY — For those who think of nature as a wild, unspoiled Eden that preserves the natural flora and fauna free from human interference, global warming has a nasty surprise in store, according to University of California, Berkeley, biologist Anthony Barnosky. Africa escaped the megafauna extinctions that hit the rest of the world at the end of the last ice age. Now, global warming promises to take out many of Africa's large herbivores and reduce the numbers of many others. (Anthony Barnosky/UC Berkeley) In his new book, "Heatstroke: Nature in an Age of Global Warming" (Island Press, 2009), Barnosky says that because of climate change, wilderness left to its own will no longer look like the natural areas we see today. Our conservation strategies must be rethought, he adds, because business-as-usual will not preserve all the aspects of nature we have come to know, love and respect. Setting aside preserves, for example, puts animals and plants in a bind: As global warming makes their current habitats unsuitable, surrounding human development prevents them from moving to more hospitable places. The alternative, assisted migration, smacks of creating wild zoos - quasi-natural areas like the dinosaur wonderland portrayed in the book and movie "Jurassic Park." "The new twist in preserving nature is that we might have to come up with a separate but equal system, where we actively set aside some tracts of land as wildlands where people can experience this feeling of 'wilderness,' but recognize that the species that live in those places and the landscape are not going to be the species and landscape we are used to," he says.
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