Organisms and Environment - I
- Ecology: It is the field of science that deals with the interrelationship between biotic and abiotic factors.
- It includes four levels of biological organisation: organisms, populations, communities and biomes.
- Major abiotic factors: Light, temperature, water, air, soil, etc.
- Eurythermal: Organisms that can tolerate wide range of temperature
- Stenothermal: Organisms that live in a narrow range of temperature
- Euryhaline: Organisms that can tolerate wide range of salinity
- Stenohaline: Organisms that live in a narrow range of salinity
- Responses of organisms to abiotic factors –
- Regulators are organisms that have the ability to maintain their constant body temperature. Example: birds and mammals
- Conformers are organisms that cannot maintain their constant body temperature with respect to their surrounding environment.
- The heat gain or heat loss from the body of an organism is the function of the body surface area relative to volume.
- Therefore, the smaller organisms have larger surface area relative to their volume, and tend to…
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