evs

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EASWARI ENGINEERING COLLEGE
ENVIRONMENTAL SCIENCE (191CYM201T)
PRESENTED BY:
SANGEETHA.M (310622106131)
SRIVATCHAN.D (310622106155)
STEPHEN RAJ .C (310622106158)
UDHAYA KUMAR.S (310622106171)
VANATHI.S (310622106173)
VARSHA H (310622106174)
VISHAL.S (310622106182)

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THREATS TO BIODIVERSITY:
THE WASTE GENERATED DUE TO INCREASE
IN HUMAN POPULATION AND
INDUSTRIALISATION ,SPOILS THE
ENVIRONMENT AND LEADS TO MORE
DIVERSITY IN BIOLOGICAL SPECIES
BIODIVERSITY:
BIO-"LIFE"
DIVERSITY-"VARIETY"
CAUSES

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CAUSES FOR LOSS OF BIODIVERSITY:
HABITAL LOSS
 1.DEFORESTATION : agricultural , or developmental project disintegrate the species
 2.DESTRUCTION OF WETLANDS: draining, filling huge biodiversity loss
 3.HABITAL FRAGMENTATION: habitat divided into small and scattered patches wild
animals and birds are vanishing

Habitat destruction is currently
ranked as the primary causes
of species extinction world
wide

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4.RAW MATERIAL: production of raw material(hybrid) plants gets extinct
 5.PRODUCTION OF DRUGS: pharmaceutical (drugs) medicinal plants are on
the verge of extinction
 6.ILLEGAL TRADE: export reduces biodiversity and habitat loss
 7.DEVELOPMENTAL ACTIVITIES: construction in forest ,discharge industrial
effluents kill the birds and aquatic organisms

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POACHING OF WILDLIFE
MEANS KILLING OF ANIMALS OR
COMMERCIAL HUNTING
1.SUBSISTENCE POACHING : to provide
enough food for their survival
2.COMMERCIAL POACHING :to sell their
produts
POACHING IS NOT LIMITED TO ANIMALS ITS
ALSO FOR PLANTS TOO...
GALAX,BLACK COHOSH AND GINSENG

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Factors influencing poaching:
1.human population:led to pressure on forest resources degradation of wildlife
habitats.
2.commercial activities: through international ban, trading of wildlife products is highly
profit, so poaching encouraging the poachers to smuggle it to other countries

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EXAMPLES
 MALE GORILLA: In Brazil and Zaire heads, body parts, hands
 BLUE MORPHO BUTTERFLY: In Brazil attractive trays and other objects
 SNOWY LARGE EQRET: In US White plumes
 ELEPHANT: Killed for ash trays and ivory.
 BENGAL TRIGERS: Its fur sell iis more than $1,00,000
 BUSH MEAT: Important protein for west and central africa

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 Wild life products : furs, horns, tasks, live specimens ,herbal products
 Wealth life wildlife: developing nations in Asia ,Latin America and Africa have
richest source of biodiversity .
 Importers of wild life: rich countries like Japan, Taiwan, Hong Kong are
the major importer of wildlife product.

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MAN-WILDLIFE
CONFLICTS
WHEN WILDLIFE STARTS CAUSING IMMENSE DAMAGE AND DANGER
TO MAN .
INCREASE IN MAN WILDLIFE CONFLICT IS DUE TO RESOURCE
LIMITATION LIKE *SPACE *FOOD *SHELTER
CAUSES IMPACTS OF HWC
1.agricultural expansion 1.grave injuries,loss of life
2.urbanization 2.damage to farms and crops
3.climate change 3.violence against animals
4.infrastructure development

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Examples for man- wildlife conflicts

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FACTORS INFLUENCING MAN-
ANIMAL CONFLICTS
 SHRINKING OF FOREST
 HUMAN ENCROACHMENT INTO THE FOREST
 ELECTRIC WIRING AROUND THEIR CROP FIELDS
 GARBAGE NEAR FOREST AREA
 ELECTRIC WIRING AROUND THEIR CROP FIELDS
 CASH COMPENSATION PAID BY GOVERNMENT IS NOT
ENOUGH

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REMEDY
 STOP-ILLEGAL HUNTING AND TRADE OF ANIMALS PRODUCTS
 STO-PURCHASE ITEAMS MADE OF ANIMAL
 BIODIVERSITY LAWS SHOULD BE STRENGTHENEND
 CROPPING PATTERN SHOULD BE CHANGED NEAR FOREST
 ADEQUATE CROP AND CATTLE COMPERSATION SCHEMES
MUST BE STARTED
 PROVIDE FOOD AND WATER TO WILDLIFE

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REFERENCE
 ENVIRONMENTAL SCIENCE AND ENGINEERING BY
DR.A.RAVIKRISHNA ,SRI KRISHNA HITECH PUBLISHING
COMPANY
 https://www.chathamhouse.org/2023/04/threats-
biodiversity
 https://bio.libretexts.org/Bookshelves/Ecology/Environ
mental_Science_(Ha_and_Schleiger)/03%3A_Conse
rvation/3.02%3A_Threats_to_Biodiversity
THANK YOU