Presentation on theme: "Bell Questions 1/12/11 1.What is a mass extinction? 2.What is the difference between an endangered species and a threatened species? 3.What is one way."— Presentation transcript:
Bell Questions 1/12/11 1.What is a mass extinction? 2.What is the difference between an endangered species and a threatened species? 3.What is one way a species may be prone to extinction?
1. Habitat Destruction and Fragmentation Habitat has been destroyed or broken up by roads, canals, fences and homes. Florida panther requires large area of forest and large amount of prey. In 2001 less than 80 panthers east of Mississippi
2. Invasive Exotic Species exotic species - species that is not native to a particular region. Exotic species can threaten native species that have no natural defenses against them. Cheatgrass
3. Harvesting, Hunting, and Poaching Poaching - the illegal harvesting of fish, game, or other species. Excessive hunting can lead to extinction. (passenger pigeons)
4. Pollution Pesticides, cleaning agents, drugs, and other chemicals used by humans are making their way into food webs around the globe. Bald Eagles and DDT
Areas of Critical Biodiversity endemic species - species that is native to a particular place and that is found only there