Biodiversity and Conservation

Biodiversity can be defined as the sum total of diversity that exists at all levels of biologicalorganisation. The three levels of biodiversity are: genetic, species and ecological diversity. The efforts have been made to protect diversity at all these levels.

Genetic diversity is the variety present in the level of genes. More genetic diversity in a species or population means a greater ability for some of the individuals to adapt to changes in the environment.

Species which are under threat of extinction can be classified as: critically endangered species, endangered species and vulnerable species.

Ecological diversity deals with species distribution and community patterns.
India has 8.1% of biodiversity of the world.

The classification of diversity was done by using various factors such as: altitude, moisture, topography, rainfall etc.

The diversity of species diversity on earth is not uniformly distributed instead shows a patterns. The species diversity is generally highest in the tropics and decreasestowards the poles.

The species richness is more in the tropics because tropics had more evolutionary time and they provide a relatively constant environment. They receive more solar energy which contributes to greater productivity.

According to Alexander von Humboldt, as more and more area is explored, species richness increases.

The fossil study reveals the incidence of mass extinctions in the past, but the present rates of extinction, largely attributed to human activities.

The reasons for high extinction rates at present include habitat (particularly forests) lossand fragmentation, over exploitation, biological invasions andco-extinctions.

The reasons for conserving biodiversity are narrowly utilitarian, broadlyutilitarian and ethical.The two strategies for conservation of biodiversity are: in situ conservation and ex situ conservation.

Recently, 34 ‘biodiversity hotspots’ in the world have been proposed for intensiveconservation efforts. Of these, three (Western Ghats-Sri Lanka,Himalaya and Indo-Burma) cover India’s rich biodiversity regions.

For in situ conservation in India there are 14 biosphere reserves, 90 national parks and 448 wildlife sanctuaries.Ex situ conservation methods include protective maintenance of threatened species in zoological parks and botanical gardens.
Cryopreservation of gametes of threatened species is also a part for conservation of biodiversity.

Apart from this, a treaty called Convention on Biological Diversity (CBD) has been signed by many nations for conservation of biodiversity.

The cryopreservation of gametes of threatened species is also a part for conservation of biodiversity.

Apart from this, a treaty called Convention on Biological Diversity (CBD) has been signed by many nations for conservation of biodiversity.

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