1. Ecology
Study of organisms and their interaction with each other and the environment

2. Levels

3. Biosphere
Everywhere on the planet that supports life

4. Biome Group of ecosystems with same climate and dominant communities

5. Ecosystem
Biotic and abiotic factors in a particular area

6. Examples of… Abiotic Factors Biotic Factors Living or once living
Nonliving
Ex. Rocks, water, temp.
Biotic Factors
Living or once living
Ex. Deer, dead leaves

7. Community
All living things in an ecosystem

8. Population
One species in an ecosystem

9. Niche
Role or job of an organism

10. Habitat
Place where organism lives

11. ECOLOGICAL PYRAMIDS -Used to show relationships among trophic levels of food chains.

12. WHAT USUALLY DECREASES AS YOU GO UP THE PYRAMID?
1. Number of organisms - More blades of grass than rabbits, more rabbits than foxes.
2. Biomass - Total dry weight of organisms at each level of the pyramid.
Energy - energy is lost as you move up the pyramid due to metabolism of the plant /animal below. 10% energy continues to next level.

13. CHANGES IN THE ECOSYSTEM CAUSE CHANGES IN THE PYRAMID - BUT THESE WILL EVENTUALLY BALANCE THEMSELVES OUT.

14. Example: Drought

15. Example: Disease in the Herbivore

16. Example: Shortage of predators

17. Symbiosis Relationship between two species living closely together
Three types

18. 1. Parasitism
One benefits, other is harmed

19. 2. Mutualism
Both benefit

20. Commensalism
One benefits, other not affected