Environmental determinants of minimum body temperature in mammals

Physiological regulation of body temperature, set at a high level, is one the key features endothermic homeotherms, such as birds and mammals. However, many mammals some have evolved ability for temporal down-regulation core temperature. We investigated how variation in environment temperature habitat primary productivity determine daily among mammalian species. Nearly half minimum species was explained by both environmental Mammals expressing low inhabited regions annual with wide seasonal variation. Simultaneously, those were characterized seasonality productivity. Furthermore, level among-year but not productivity, only adapted to relatively humid conditions. Our results suggest that heterothermy can be selectively advantageous circumstances when energetic demands maintaining homeothermy, physiological stable cannot supported. The corroborate hypothesis may higher chances surviving extinction events caused climatic changes. Therefore, adaptation contemporary represents mechanism ongoing global warming.