redOrbit: Tropical lizards detect the effects of global warming in a climate where the smallest change makes a big difference, according to herpetologist Laurie Vitt, curator of reptiles and George Lynn Cross Research Professor at the University of Oklahoma’s Sam Noble Museum of Natural History. Climate change caused by global warming threatens the very existence of these and other tropical species, the ecosystem and its by-products, Vitt maintains. Vitt has studied the ecology of lizards in …