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Environment Book Summary Presented Bu Aartee Mishra
CHAPTER 7 diversit
Biodiversity conservation Conservation of biological diversity leads to conservation of essential ecological diversity to preserve the continuity of food chains. >The genetic diversity of plants and animals is preserved. > It ensures the sustainable utilization of life support systems on earth. > It provides a vast knowledge of potential use to the community > A reservoir of wild animals and plants is preserved, thus enabling them to be introduced, if need be, in the surrounding areas. >Biodiversity conservation assures sustainable utilization of potential resources. MODES OF CONSERVATION Ex-situ conservation: Conserving biodiversity outside the areas where they naturally occur is known as ex-situ conservation.
Here, animals are reared or plants are cultivated like zoological parks or botanical gardens. Reintroduction of an animal or plant into the habitat from where it has become extinct is another form of ex situ conservation. For example, the Gangetic gharial has been reintroduced in the rivers of Uttar Pradesh, Madhya Pradesh and Rajasthan where it had become extinct. Seed banks, botanical, horticultural and recreational gardens are important centres for ex-situ conservation. In-situ conservation: Conserving the animals and plants in their natural habitats is known as in- situ conservation. The established natural habitats are: National parks Sanctuaries
.Biosphere reserves and .Reserved forests Bodiversity Comservation Protected forests Nature reserves biodiversity!Nat alHome Constraints in Artifical Home conservation Low priority for conservation of In-Situ Ex-Situ living natural resources. Exploitation of living natural resources for monetary gain. 1. wild ie sonctwary Values and knowledge about the species inadequately known Unplannedtonau Park urbanization and uncontrolled industrialization. 1. Seed bank 2. Zoo 3. Botanical Garden and 3.Biosphere Reserve
BOTANICAL GARDEN Botanical garden refers to the scientifically planned collection of living trees, shrubs, herbs, climbers and other plants from various parts of the globe. Purpose of botanical gardens 1. To study the taxonomy as well as growth of plants. 2. To study the introduction and acclimatization process of exotic plants. 3. It acts as a germ plasm collection. 4. It helps development of new hybrids. 5. It augments conserving rare and threatened species. 6. It facilitates training of staff. 7. It acts as a source of recreation.
zoo Zoo is an establishment, whether stationary or mobile, where captive animals are kept for exhibition, to the public and includes a circus and rescue centres but does not include an establishment of a licensed dealer in captive animals CZA The initial purpose of zoos was entertainment, over the decades, zoos have got transformed into centres for wildlife conservation and environmental education. Apart from saying individual animals, zoos have a role to play in species conservation to fthrough captive breeding) Zoos provide an opportunity to open up a whole new world, and this could be used in sensitising visitors regarding the value and need for conservation of wildlife.