BIO120H1 Lecture Notes - Lecture 15: Ecophysiology, Thermoregulation, Homeostasis
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BIO120H1 Full Course Notes
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Lecture 15 animal ecophysiology: heat balance/thermal ecology of animals, modes of heat gain and loss; homeostasis, size, shape, insulation, evaporative cooling, behavioural thermoregulation, trade-o principle and adaptive compromises (example of weasel body shape) Biodiversity is more than just the number of species at a site; it"s also the diversity of their morphologies, physiologies, and behaviours. Temperate animals withstand colder temperatures than tropical animals. Temperate animals also tolerate a wider range of temperatures than tropical animals. Size matters to heat balance (and other balances of gains and losses: homeostasis and surface area:volume (sa:v) ratio, surface area determines equilibration rate, volume provides the inertia. Size matters: bergmann"s rule: homeotherms tend to be larger at higher latitudes (colder) There used to be elephants (mammoths) in cold place. Chrysopelea gliding snake, borneo; restricted to warm tropics. Turtle ants (cephalotes) are also at (for ants), live in trees, and can glide!
