Fig. 4

Observed microrefuge temperatures at occupied and unoccupied sites (year-long). The observed differences between surface and subsurface temperatures at sites that were occupied and unoccupied by American Pika (Ochotona princeps) in the central Rocky Mountains, June – October 2010 – 2012. Data are summarized by Julian date, years averaged, and fit with a 3-day moving average. Two vertical, dashed lines denote the beginning and end of the warm season (1 June, 30 September, respectively), during which green vegetation was available, and pikas were collecting vegetation for overwinter food stores