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The temperature-size rule denotes the plastic response (i.e. phenotypic plasticity) of organismal body size to environmental temperature variation. [ 1 ] [ 2 ] Organisms exhibiting a plastic response are capable of allowing their body size to fluctuate with environmental temperature.
The bodies of some animals, such as woodrats, are inversely correlated with the mean annual temperature of their environment. [9] This is an applied example of Bergmann's rule; Drosophila species occur in both tropical climates, where the temperature is warm, and temperate climates, where the temperature is colder. When both groups of species ...
Environments with unpredictable temperature changes might have favored animals that could regulate their body temperature internally, allowing them to adapt to varying conditions. Coevolution with Microorganisms: Homeothermy might have evolved in response to interactions with microorganisms, such as parasites and pathogens. Warm-blooded animals ...
The body temperatures of many small birds (e.g. hummingbirds) and small mammals (e.g. tenrecs) fall dramatically during daily inactivity, such as nightly in diurnal animals or during the day in nocturnal animals, thus reducing the energy cost of maintaining body temperature. Less drastic intermittent reduction in body temperature also occurs in ...
A stenotherm (from Greek στενός stenos "narrow" and θέρμη therme "heat") is a species or living organism capable of surviving only within a narrow temperature range. This specialization is often found in organisms that inhabit environments with relatively stable environments, such as deep sea environments or polar regions.
Poikilotherm is the opposite of homeotherm – an animal which maintains thermal homeostasis. In principle, the term could be applied to any organism, but it is generally only applied to vertebrate animals. Usually the fluctuations are a consequence of variation in the ambient environmental temperature. Many terrestrial ectotherms are ...