Ongoing climate change has profoundly affected global biodiversity, but its impacts on
populations across elevations remain understudied. Using mechanistic niche models …

Background High-altitude ecosystems are extreme environments that generate specific
physiological, morphological, and behavioral adaptations in ectotherms. The shifts in gut …

Aim Physiological and metabolic performance are key mediators of the functional response
of species to environmental change. Few environments offer such a multifaceted array of …

In ectothermic animals, body temperature is the most important factor affecting physiology
and behavior. Reptiles depend on environmental temperature to regulate their body …

A 20-month recapture analysis of 1001 individually marked mesquite lizards (Sceloporus
grammicus) suggests that variation in thermal quality across three altitudes influences …

Body temperature is important in determining individual performance in ectotherms such as
lizards. Environmental temperature decreases with increasing altitude, but nevertheless …

Individuals that inhabit broad elevational ranges may experience unique environmental
challenges. Because temperature decreases with increased elevation, the ectotherms living …

Lizards that inhabit high-latitude alpine zones are exposed to extreme temperatures and
long winters and most are diurnal heliotherms. Yet some poorly known nocturnal species …

Sprint speed is a major performance trait in animal fitness involved in escaping from
predators, obtaining food, and defending territory. Biotic and abiotic factors may influence …

Viviparity, an innovation enhancing maternal control over developing embryos, has
evolved> 150 times in vertebrates, and has been proposed as an adaptation to inhabit cold …