BIODIVERSITY ( Definition ) Number of species on earth around 1.5 million per sq.km. So far maximum...
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Transcript of BIODIVERSITY ( Definition ) Number of species on earth around 1.5 million per sq.km. So far maximum...
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)
BIODIVERSITY (VARIETY AND VARIABILITY AMONG LIVING ORGANISMS)
Compiled by Suvra Das(PGT Biology),K.V.Gole Market, Delhi
Distributional Patterns
Species-Area Relationship
log S=log C+ Z log A
Latitudinal Gradients(least in poles, high in
equator & highest in tropics)
BIODIVERSITY (Classification on basis of Diversity)
SPECIES DIVERSIT
YIt 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
DIVERSITYIt is
variation in ecosystem along with their biota
BIODIVERSITY (In terms of utility)
Narrow utilitarian Broad utilitarian
Food,Fodder,Firewood,Fibre,Construc
tion material,Industrial Products,Bioactive Substances,Medicine(Bioprospecting
)
Ecosystem Services
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
METHODS OF CONSERVATION OF BIODIVERSITY
In-situ(within natural habitat)
Ex-situ(outside natural habitat)
PROTECTED AREASNational Parks(90),
Wildlife Sanctuaries(448),
Biosphere
Zoological Parks,Botanical Garden,Cryopreservation,
Sperm Bank,Gene Bank
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