Biodiversity Warm Up Question: Answer in your notebook What is your favorite animal? Why?
Biodiversity: • short for biological diversity – usually this term is used to refers to the variety of different species in a given area • Biosphere: • all the places on the planet where living things exist
Levels of Biodiversity Species- variety of different organisms Ecosystem- variety of habitats and organisms Genetic- variability within a species (DNA)
EcoTourism • Where nature and $$ co-exist • Countries set aside national park land • Wealthy people from other countries pay to visit • Typically in biodiversity “hotspots” • Rainforests, exotic ecosystems • End Goals: • Host country makes $$ • Eco-tourists leave happy • Ecosystem remains (relatively) undisturbed
Endemic species: • a species that is native to a particular place and that is found only there.
Ecologists often use the numbers of endemic species of plants as an indicator of overall biodiversity because plants form the basis of ecosystems on land. • Areas of the world with greater diversity also have large numbers of endemic species.
Keystone Species: • “A species that is critical to the functioning of the ecosystem in which it lives because it affects the survival and abundance of many other species in its community” • Critical member of the ecosystem • Removal of this species could bring collapse to the entire food web
Video- Why are bees disappearing? http://www.ted.com/talks/marla_spivak_why_bees_are_disappearing.html
Closure Questions • What is the difference between an endemic species and an invasive species? • Name 2 benefits of biodiversity to humans • What is one reason for bee decline?