iodiversity is vital to boost productivity in ecosystems where species depend on to live. However, a lot of man-made activities impose huge impacts on biodiversity. Below, we discuss six of the major threats to biodiversity: climate change, habitat loss and degradation, pollution, invasive species, over-exploitation and epidemics.

1. Ashish sahu

17. • Overexpliotation occurs when a resource is consumed at
unsustainable rate
• This occurs on land in the form of overhunting,excessive logging,poor
soil conservation in agriculture and the illegal wildlife trade
• About 25% of the world fisheries are now overfished to the point
where their current biomass is less than the level that maximizes their
sustainability yield
• The overkill hypothesis a pattern of large animal extinctions
connected with human migration patterns ,can be used explain why
megafaunal extinctions can occur within a relatively short time period

18. Introdused and invasive species
• Barrers such as large rivers, seas, oceans, mountains, and deserts
diversity by enabling independent evolution one either side of the
barrier via the process of allopatric speciation
• .the term invasive species is applied to species that breach the natural
barrier that would normally keep them constained
• Without barrier, such species occupying their niches,or by using
resources that would normally sustain native species

20. Climatic change
• Global warming is also considerd to be a major potential treats to
global biodiversity in the future
• For example, coral reefs which are biodiversity hotspots will be lost
within the century if global warming continues at the current trend
• A recent study predicts that up to 35% of the world terrestrial
carnivores and ungulates will be at higher risk of extinction by 2050
because of the joint effects of predicted climate and land use change
under business as usual human development scenarios

27. References
What is biodiversity PDF.united nations environmental programme,
world conservation monitoring center
Gaston,kevin J 11 May 2000.Global patterns in biodiversity

28. THANK YOU