BIOL 100 Lecture Notes - Lecture 27: Endangered Species, Vulnerable Species, Overexploitation
Document Summary
Identify and discuss the five major threats to biodiversity (hint: think (cid:862)hippo(cid:863)) Humans need other species for food, clothing, oxygen, symbiosis. Biodiversity hot spot- small area with great concentration of endemic species and many endangered and threatened species. Endangered species- high risk of extinction in the future. Vulnerable species- likely to become extinct in the more distant future. Predatory invaders: invasive species into habitats with no or few natural predators. Competitive invaders: invasive species compete with native species for resources. Fiver major threats to biodiversity: habitat destruction, invasive species, population, Addressing these threats may help recover or prevent future loss of biodiversity. Pollution: chemical, physical, biological change in the environment that harms the living organisms. Nitrogen and phosphorus are essential elements for life, but too much can be harmful- chemical run off changes aquatic ecosystems. Eutrophication- excessive nutrients from run off ultimately lead to oxygen poor water that cannot.
