This is an interesting article. Does anyone know where I can find the full paper online? (Gerardo Ceballos and Paul R. Ehrlich. Discoveries of new mammal species and their implications for conservation and ecosystem services.)
ScienceDaily (Feb. 16, 2009) — In the era of global warming, when many scientists say we are experiencing a human-caused mass extinction to rival the one that killed off the dinosaurs, one might think that the discovery of a host of new species would be cause for joy. Not entirely so, says Paul Ehrlich, co-author of an analysis of the 408 new mammalian species discovered since 1993.