1. KEY CONCEPT Every ecosystem includes both living (biotic) and nonliving (abiotic) factors.

2. Biotic factors are living things.
plants
animals
fungi
bacteria
plants

3. Abiotic factors are nonliving things.
moisture
temperature
wind
sunlight
soil
moisture
sunlight

4. Every ecosystem contains biotic and abiotic factors
List the biotic and abiotic factors in this picture

5. Biodiversity is the assortment, or variety, of living things in an ecosystem.
Rain forests have more biodiversity than other locations in the world, but are threatened by human activities. (50% of the world’s plant and animals species are here)

6. Number of species NOT Population number
Biodiversity has to do with:
Number of species NOT Population number

7. Extinctions lower biodiversity!!!

8. A keystone species is a species that has an unusually large effect on its ecosystem. Ex: A beaver
Their removal from the ecosystem may cause a ripple effect felt across an entire ecosystem
keystone

9. By felling trees to construct dams, Beavers:
Change free flowing streams into ponds, wetlands, and meadows
Lead to an overall increase in biodiversity
creation of
wetland
ecosystem
increased waterfowl
Population
increased fish
population
nesting sites for birds
keystone species

10. More variety of fish- Fish attract birds
Insects inhabit pond and dead trees along the shore- Insects attract birds
Animals that prey on birds are attracted to the pond
creation of
wetland
ecosystem
increased waterfowl
Population
increased fish
population
nesting sites for birds
keystone species