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