Acclimatization, acclimation and adaptation
Acclimatization, adaptation, and acclimation all describe how organisms respond to environmental changes, but they are different processes. Acclimatization happens naturally within an individual's lifetime to help them adjust to environmental shifts.[1] Adaptation is a long-term process where species evolve over generations.[2] Acclimation is like acclimatization, but happens in artificial conditions, such as a lab. [1]
| Term | Meaning | How Long it Takes | Example |
|---|---|---|---|
| Acclimatization | Natural short-term adjustments. | Days to months | A person producing more red blood cells at high altitudes. [2] |
| Adaptation | Permanent genetic changes in a species. | Generations | Polar bears developing thick fur over time. [2] |
| Acclimation | Changes in a controlled environment. | Days to weeks | A fish in a lab slowly adjusting to warmer water. [1] |
Acclimatization happens in response to things like temperature, oxygen levels, or seasonal changes. it helps individuals survive in new conditions, but it does not change their genes. Adaptation, on the other hand, takes much longer and is passed down through generations. Acclimation is a short-term adjustment seen in scientific experiments.[1]
These differences are important for understanding how organisms respond to climate change. Some species can acclimatize to rising temperatures, but others may need to adapt over generations if they have enough time.[1]
Acclimatization and climate change
Acclimatization helps organisms get through short-term environmental changes, including shifts caused by climate change.[3] As global temperatures rise, species must adjust quickly to survive in new conditions. For example, animals might change their behaviors, such as shifting hunting periods to cooler parts of the day. Plants may even alter their flowering cycles or growth patterns.[3] However, acclimatization has limits. If environmental changes occur too quickly or become too extreme, some species may not be able to adjust effectively.[3] This could lead to decreased survival rates and reduced populations. On rare cases, long-term survival relies on genetic adaptation, which occurs over multiple generations. These limits help scientists understand, and predict, which species might be vulnerable to rapid climate changes and guide conservation efforts. [3]
In certain studies, zebrafish (Danio rerio) exposed to natural environmental fluctuations (such as temperature or oxygen levels) displayed adjustments like changes in their breathing rates and metabolic activities. Similar adjustments can be observed in a laboratory setting, known as acclimation, where conditions were artificially altered. However, these lab-induced changes were easily reversible once conditions returned to normal.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Angilletta, Michael J. (2009). Thermal Adaptation: A Theoretical and Empirical Synthesis. Oxford University Press. ISBN 978-0198570875. Search this book on
- ↑ 2.0 2.1 2.2 Hoffmann, Ary A.; Sgrò, Carla M. (2011). "Climate change and evolutionary adaptation". Nature. 470 (7335): 479–485. doi:10.1038/nature09670.
- ↑ 3.0 3.1 3.2 3.3 Pörtner, Hans O.; Farrell, Anthony P. (2008). "Physiology and climate change". Science. 322 (5902): 690–692. doi:10.1126/science.1163156.
Koroleva, A.G.; Vakhteeva, E.A.; Epifantsev, A.A.; Sukhanova, L.V.; Yakhnenko, V.M.; Glyzina, O.Y.; Tolstikova, L.I.; Cherezova, V.M.; Sidorova, T.V.; Potapov, S.A.; et al. Acclimation during Embryogenesis Remodulates Telomerase Activity and Gene Expression in Baikal Whitefish Larvae, Mitigating the Effects of Acute Temperature Stress. Animals 2024, 14, 2839. https://doi.org/10.3390/ani14192839
Sapozhnikova, Y.P.; Koroleva, A.G.; Sidorova, T.V.; Potapov, S.A.; Epifantsev, A.A.; Vakhteeva, E.A.; Tolstikova, L.I.; Glyzina, O.Y.; Yakhnenko, V.M.; Cherezova, V.M.; et al. Transcriptional Rearrangements Associated with Thermal Stress and Preadaptation in Baikal Whitefish (Coregonus baicalensis). Animals 2024, 14, 3077. https://doi.org/10.3390/ani14213077
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