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BIODIVERSITY ( Definition )

BIODIVERSITY ( Definition ). Number of species on earth around 1.5 million per sq.km . So far maximum have been identified & many more are to be identified(among animals insects & fishes dominate while in plants angiosperm and fungi dominate). Distributional Patterns.

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BIODIVERSITY ( Definition )

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  1. BIODIVERSITY (Definition) Number of species on earth around 1.5 million per sq.km . So far maximum have been identified & many more are to be identified(among animals insects & fishes dominate while in plants angiosperm and fungi dominate)

  2. Distributional Patterns Compiled by Suvra Das(PGT Biology),K.V.Gole Market, Delhi Species-Area Relationship log S=log C+ Z log A Latitudinal Gradients(least in poles, high in equator & highest in tropics) Biodiversity(Variety and variability among living organisms)

  3. BIODIVERSITY(Classification on basis of Diversity) SPECIES DIVERSITY It is number of species in a given area and their evenness in distribution GENETIC DIVERSITY It is variation within the population of the same species due to difference in allele/gene ECOLOGICAL DIVERSITY It is variation in ecosystem along with their biota

  4. BIODIVERSITY (In terms of utility) Narrow utilitarian Broad utilitarian Food,Fodder,Firewood,Fibre,Constructionmaterial,IndustrialProducts,BioactiveSubstances,Medicine(Bioprospecting) Ecosystem Services

  5. BIODIVERSITY(CAUSES OF LOSS OF BIODIVERSITY) • Habitat Los • Habitat Fragmentation • Habitat Shrinkage • Overexploitation/ Urbanisation • Co-extinction & Mass extinction • Invasion of alien species • Pollution • Global Climate Change

  6. METHODS OF CONSERVATION OF BIODIVERSITY In-situ(within natural habitat) Ex-situ(outside natural habitat) PROTECTED AREAS National Parks(90), Wildlife Sanctuaries(448), Biosphere Zoological Parks, Botanical Garden, Cryopreservation, Sperm Bank, Gene Bank

  7. BIODIVERSITY CONSERVATION EFFORTS Compiled by Suvra Das(PGT Biology), K.V.Gole Market, Delhi International National Convention on Biological Diversity(CBD), Rio Summit 1992, World Summit on Sustainable Development Johannesburg 2002 National Biodiversity Act 2002, National Biodiversity Strategy Action Plan

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