The document discusses the meaning of biodiversity as the great variety of species that exist on Earth. It notes that all species are interdependent and loss of a single species can begin a chain reaction of destruction. The main reasons for loss of biodiversity mentioned are population explosion, habitat destruction, pollution, and global warming. Conservation efforts include creating national parks and sanctuaries and declaring biodiversity zones.

1.  Presented By : Fatima Khair Subject : Science Standard : VIII Topic : Biological Diversity K.J.Somaiya Comprehensive college of Education,Training and Research

5. Meaning Loss of biodiversity Conservation of biodiversity Content

6. Biodiversity is the great variety of species that exist on the earth Meaning:

7. All the species are interdependent on each other Why is biodiversity important?

8. Loss of a single species can begin a chain reaction of destruction

9. Contributes to 8% of total number of Species i.e 1.75 million (as per Global Biodiversity Assesment of UNEP-1995) Status of Biodiversity in India

10. Reasons for loss of biodiversity

11. Main reason for loss of biodiversity 1. Population explosion

12. Single crop method of farming

13. Most critical threat to marine biodiversity 2.Habitat destruction

14. Oil pollution (Exxon Valder accident in Alaska) 3.Pollution

15. Dumping of garbage at sea

16. 4.Global warming

17. Potent threat to biodiversity Endemic species not able to survive 5.Exotic species

18. One – eight of plant species are threatened with extinction 1,40,000 species are lost every year Up to 2030, 50% of Earth’s species are estimated to become extinct Effect of loss of biodiversity

19. 1.Creating National Parks and Sanctuaries Sunderban national park Bird sanctuary Conservation of biodiversity

20. 2.Declaring some areas as biodiversity zones

21. 3.Undertaking certain projects to nurture specific species

22. 1.What is the meaning of biodiversity? Ans: The great variety of species that exist in the earth. 2.Why is it important? Ans: All species are interdependent on each other and a loss of single species can begin a chain reaction of destruction Evaluation

23. 3.What are the reasons for loss of biodiversity? Ans: Population explosion,habitat destruction,global warming etc. 4.How has global warming affected biodiversity? Ans: Global warming has resulted in climate change at such a fast pace that it has become impossible for species to adapt to it.

24. 5.What are the measures taken to conserve biodiversity? Ans: Creating National Parks and Sanctuaries, declaring some areas as Reserved Biodiversity Zones etc. 6.Why is biodiversity conservation “need of the hour”? Ans: So many plants and animals are headed towards extinction. To maintain the ecological balance every species is equally important.

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