Acclimatisation (also-called acclimation or acclimatation) is the process in which an individual organism adjusts to a change in the environment (such as a change in altitude, temperature, humidity, photoperiod, or pH), allowing it to maintain performance across a range of environmental conditions. Acclimatization describes adaptive physiological or behavioural changes within an organism in response to their natural climate or environment.
Examples
1)Animals acclimatize in many ways. Sheep grow very thick wool in cold, damp climates. Fish are able to adjust only gradually to changes in water temperature and quality. Tropical fish sold at pet-stores are often kept in acclimatization bags until this process is complete.
2)The salt content of sweat and urine decreases as people acclimatize to hot conditions
3)Humans who migrate permanently to a higher altitude naturally acclimatize to their new environment by developing an increase in the number of red blood cells to increase the oxygen carrying capacity of the blood, in order to compensate for lower levels of oxygen intake