Anita, Below are two excellent case studies that are near and dear to my heart. As far as i know, this is the first evidence of a small-medium sized mammal being extirpated by rising temperatures.
Beever, E.A., Brussard, P.F. and Berger, J. 2003. Patterns of apparent extirpation among isolated populations of pikas (Ochotona princeps) in the Great Basin. Journal of Mammalogy 84(1):37-54 Grayson, D.K. 2005. A brief history of Great Basin Pikas. Journal of biogeography 32:2103-2111. pika and marmot guy, Lucas Moyer-Horner
