1. 22-1: Community propertiesPP

2. Species (organism) Population Community (interaction of different species) Ecosystem Biosphere

3. PROPERTIES OF A COMMUNITY
Species Richness: The number of species in an area

4. PROPERTIES OF A COMMUNITY
Species Richness: The number of species in an area
Species Evenness: the abundance of each type of species

6. Which has more species richness? Which has more species evenness?

7. 3. Species- Area Effect: larger areas contain more species than smaller areas (many different niches)

8. The variety of organisms in a given area
BIODIVERSITY
The variety of organisms in a given area

9. BIODIVERSITY
The variety of organisms in a given area
Based on a measurement of species evenness and richness

10. BIODIVERSITY
10-30 million species with most biodiversity in insects

11. Calculating Biodiversity
Biodiversity index = # Species
# Organisms

12. Calculating Biodiversity
Biodiversity index = # Species
# Organisms
The closer to 1 the biodiversity index is, the more diverse and healthy the ecosystem is (higher the biodiversity)