Organisms and Populations

• 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
  …