Status and Trends of Biodiversity
Overview
India is one of the 17 “megadiverse” countries and is composed of a
diversity of ecological habitats like forests, grasslands, wetlands,
coastal and marine ecosystems, and desert ecosystems. Almost 70% of the
country has been surveyed and around 45,000 plant species (including
fungi and lower plants) and 89,492 animal species have been described,
including 59,353 insect species, 2,546 fish species, 240 amphibian
species, 460 reptile species, 1,232 bird species and 397 mammal species.
Endemism of Indian biodiversity is significant with 4950 species of
flowering plants, 16,214 insects, 110 amphibians, 214 reptiles, 69 birds
and 38 mammals endemic to the country. One of the major causes for the
loss of biodiversity in India is the expansion of agriculture in
previously wild areas. Other impacts include: unplanned development,
opening of roads, overgrazing, fire, pollution, introduction and spread
of exotics, excessive siltation, dredging and reclamation of water
bodies, mining and industrialization. In this century, the Indian
cheetah, Lesser Indian rhino, Pink-headed duck, Forest owlet and the
Himalayan mountain quail are reported to have become extinct and several
other species (39 mammals, 72 birds and 1,336 plants) are identified
vulnerable or endangered.
Number and Extent of Protected Areas
The network of protected areas presently covers 4.74% of the country’s
total land area and includes 94 national parks and 501 wildlife
sanctuaries. Of these, 100 cover both terrestrial and freshwater
ecosystems and 31 are marine protected areas. There are also 14
Biosphere Reserves and several Reserved Forests, which are part of the
most strictly protected forests outside the protected areas. India also
has areas declared as a part of the International Bird Area Network.
14000 sacred groves have been documented.
Percentage of Forest Cover
As per the latest report of the Forest Survey of India (2003), forests
cover 23.68% of India’s total geographic area, which includes 3.04% of
the tree cover. Area under grasslands is about 3.9% and deserts cover
about 2%. It is estimated that India has about 4.1 million ha of
wetlands (excluding paddy fields and mangroves). The marine ecosystem in
India covers 2.1 million sq. km, and the total area covered by
mangroves is estimated at about 6,700 sq. km.
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