3. India has a rich biological diversity .
It is one of the twelve mega bio-diversity
countries of the world.
It has nearly 8% of the total number of
species in the world.
Total no. of plant species in India- 47000
Flowering plant species- 15000
This account for 6% in the world’s total no. of flowering
plants.
Non flowering plant species- 32000
India occupies 10th place in the world & 4th in
Asia in plant diversity.
Total no. of animal species- 81000
4. Natural vegetation refers to a plant
community which has grown naturally
without any human aid and has been left
undisturbed by humans for a long time.
Itis otherwise known as ‘Virgin
vegetation’.
5. RELIEF
LAND
SOIL
CLIMATE
TEMPERATURE
SUNLIGHT
PRECIPITATION
6. ECONOMIC VALUE:
Wood is a major forest product.
Other minor products are oil, gums & resins, tans &
dyes, paper & rayon, medicines from herbs & roots
etc.
ENVIRONMENTAL VALUE:
Checks soil erosion
Increases the level of water table.
Revitalizing the atmosphere.
Increase the fertility of the soil.
Modify the temperature,controls wind force & causes
rainfall.
Natural habitat for plants & animals
7. International Union for Conservation of
Nature & Natural Resources (IUCN) has
classified the species into various categories
as under:
Extinct species
Endangered species
Vulnerable species
Rare species
Endemic species
Normal species