Organisms and Populations – Notes

Introduction To Organisms And Its Environment
Ecology is a subject which studies the interactions among organisms and between the organism and its abiotic environment.
Ecology deals with four levels of biological organisation-organisms, populations, communities and biomes.
Each organism is surrounded by a host of abiotic and biotic components of the environment with which it continuously interacts.
Abiotic components of the environment are temperature, water, light, soil, humidity and wind.
Biotic components of the environment are pathogens, parasites, predators and competitors.
Annual variations in temperature and precipitation are responsible for the formation of major biomes such as deserts, rainforests and tundra.
Each biome is affected by local and regional variations, which has resulted in the formation of a wide range of habitats.

Major Abiotic Factors
Some major abiotic factors of the environment are temperature , light, water and soil.