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Sustaining Biodiversity (Extinctions (Greatest threats to any species…
Sustaining Biodiversity
Extinctions
Plate tectonics
Volcanic activity
Extraterrestrial impacts
5 major extintions
First 2 caused by global cooling followed by rapid warming
3rd by volcanic activity
4th K-T boundary
5th lined to cooling and glaciation
Current extinction began near the end of the pleistocene Epoch
Extinctions are natural but can increase in rate very sharply
Biological extinction
Trophic cascade
Examples on slide
Mass extinction
Different kinds of extinctions
Regionally extinct
Functionally extinct
Endangered species
Threatened species
Greatest threats to any species
Habitat destruction
Invasive species
Population growth
pollution
Climate change
Overexploitation