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TOPIC OF THE DAY

Environment

The environment is defined as ‘the sum total of living, non-living components; influences and events, surrounding an organism. All organisms (from virus to man) are obligatorily dependent on the other organism and environment for food, energy, water, oxygen, shelter and for other needs.

The relationship and interaction between organism and environment are highly complex. It comprises both living (biotic) and non-living (abiotic) components. The environment is not static. Both biotic and abiotic factors are in flux and keep changing continuously.

Ecosystems

The term ecosystem was coined by Sir Aithur Tansley in 1935. According to Fitzpatrick, a group of organisms interacting among themselves and with the environment is known as Ecosystem.

An ecosystem is essentially a technical term for 'nature. An ecosystem is a self-regulating and self-sustaining structural and functional unit of the biosphere. This system depends upon the sun for its energy.

Terms related to Ecosystems

Organism: An organism is a fundamental functional unit in ecology because it interacts directly with the environment as well as with other organisms, e.g., a rabbit.

Population: It refers to the organisms of the serene species that are in proximity to one another, e.g, a group of rabbits.

Community: It includes all the populations occupying a given area. The size of a community depends on our scale of reference. We might use the community to refer to all of the living things in a particular area like a pond or we might restrict our interest to the fish community or the plant community.

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