Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download ECOSYSTEM ECOLOGY
Document related concepts
Biogeography wikipedia , lookup
Extinction debt wikipedia , lookup
Occupancy–abundance relationship wikipedia , lookup
Restoration ecology wikipedia , lookup
Unified neutral theory of biodiversity wikipedia , lookup
Conservation biology wikipedia , lookup
Theoretical ecology wikipedia , lookup
Introduced species wikipedia , lookup
Island restoration wikipedia , lookup
Operation Wallacea wikipedia , lookup
Habitat conservation wikipedia , lookup
Biodiversity wikipedia , lookup
Latitudinal gradients in species diversity wikipedia , lookup
Transcript
BIODIVERISTY PP. 435-439 Species (organism) Population Community Ecosystem Biosphere BIODIVERSITY • • the variety of organisms in a given area Based on a measurement of species evenness and richness as well as genetic diversity • ↑species richness and ↑ evenness: ↑ stability (ability to withstand disturbances in the ecosystem) • High richness and evenness = High biodiversity • Sites A, C, and D have more richness • Sites A and C has the most evenness Which site has the highest biodiversity? MEASURING EARTH’S BIODIVERSITY ECOSYSTEM DESTRUCTION • Biggest threat to biodiversity due to habitat destruction • Loss of biodiversity results in community instability • • • • Extinction of species Imbalances (i.e. removing keystone species) Invasive species are the second largest threat An invasive species can out compete native species and often lack predators in the area ARROWS INDICATE MASS EXTINCTION • Currently in a time of high biodiversity • Estimated by 2030, 20% of species will be gone • Rainforest biome contains 1/5 of the world’s species but is quickly disappearing
