Question

Which is not a natural ecosystem?
(a) Desert (b) Aquarium (c) Forest

NCERT Class 7th Social Science (Our Environment) Chapter 1 Environment

Answer 1

Aquarium is not a natural ecosystem.  

An aquarium is a man-made ecosystem which is designed for faunal life mainly including fishes, snails, or other aquatic animals along with aquatic plants. An aquarium is used as a showpiece in house, mall, restaurant and etc.  

On the other desert and forest are natural ecosystem composed of biotic and abiotic components. In both deserts and forest, all the biotic and abiotic components are free to interact. Moreover, the changes in both places take naturally.

Answer 2

Option (b) is the correct answer

Aquarium is not a natural ecosystem.

Explanation:

• A natural ecosystem is formed by  the interactions between organisms and the environment.
• A natural ecosystem works purely on the basis of solar energy.
• Natural ecosystems contains soil, plants, sunlight, air, water, microorganisms, and animals.
• Man-made artificial ecosystem for recreational purposes is Aquarium.

• Aquarium is known as an artificial ecosystem as it is man-made.

• Here the aquatic beings placed in an aquarium, they are removed from their natural aquatic ecosystem.

• Flora and fauna are naturally present in a region and this is Natural ecosystem.

• In natural ecosystem each component will interacts together through biological, physical and chemical processes.

• They are also located away from human interference in their surroundings.
• The non-living components of an ecosystem includes Climate and soil type, plants, animals and other life forms are the living components.

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