2 Biodiversity What happened to the dinosaurs? A meteor created dust that blocked the sun?A climate change?A dino with limited predators destroyed the eggs?Other suggestions?
3 Biodiversity Biodiversity at Risk Biodiversity Number and variety of species on EarthMost of Earth’s species are concentrated in certain biomes1.6 million known speciesWhy are many unknown?Mostly Insects, Why?Including unknown – probably 10 to 50 million
4 Biodiversity Extinction – disappearance of a species Mass Extinction Many species at one time/over a short period become extinctIn the past, all probably caused by climate changeCurrently happening faster than everHow are humans causing extinction?Habitat DestructionHunting (poaching)Exotic Species
5 Future of Biodiversity Biodiversity Hot SpotsAreas with many species, in danger of becoming extinct or endangeredTropical, close to equator, coastalTo Save – Large National Parks?Habitat conservationPlans to protect one or more species in a large area of land
6 BiodiversityBetween 1900 and 2100 it is expected that about 25% of species will have become extinct.Why does it matter?We lose potential medicines, loss of genetic diversity, food sources, can ruin whole ecosystem, ethical and aesthetic reasons, etc…Loss of Keystone speciesSpecies that are important to the proper functioning of an ecosystemExample: sea otterThey kept the sea urchin population in check