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Natural Vegetation and Wild Life Class 9 Notes Geography Chapter 5

March 16, 2017 by Sastry CBSE

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Natural Vegetation and Wild Life Class 9 Notes Social Science Geography Chapter 5 SST Pdf free download is part of Class 9 Social Science Notes for Quick Revision. Here we have given Natural Vegetation and Wild Life Class 9 Geography Chapter 5 Notes.

Natural Vegetation and Wild Life Class 9 Notes Social Science Geography Chapter 5

India is one of the twelve mega bio-diversity countries of the world. They are a group of countries that have the majority of the Earth’s species and therefore, considered extremely bio-diverse.

Being a vast country, India having 47,000 plant species (out of which 15,000 are flowering plants, i.e. 6 per cent in the world), occupies 10th position worldwide and 4th in Asia. Non-flowering plants such as ferns, algae and fungi also grow here. It also has around 90,000 species of animals (including marine and water fishes) and insects.

Natural Vegetation

Natural or virgin vegetation means the plant community which has grown naturally without any human intervention for a long time. That natural vegetation, which are left undisturbed over a long period of time are called virgin vegetation.

Virgin vegetation are of two types

Endemic species Those plant species which originated from the country, are termed as endemic species.

Exotic species Those plant species which originated outside the country are termed as exotic species.

Factors Affecting Diversity

Factors which influence the variety of flora and fauna include Relief (land and soil), Climate (temperature, photoperiod and precipitation) and the Ecosystem. These are as follows

Relief

It includes land and soil.

Land

It affects the natural vegetation both directly and indirectly. The nature of the land i.e. whether it is plain, hilly or a plateau, determines the kind of vegetation which will grow in it. Fertile lands are used for growing crops, vegetables and fruits.