1. Biotic & Abiotic Influences

2. Ecosystem: all the living organisms that share a region & their physical & chemical environment

3. Biotic & Abiotic Influences Biotic Factors: all organisms that are living or once were living and everything that they made Nests Poop

4. Biotic & Abiotic Influences Biotic Factors: can be broken down in an ecosystem: Population: a group of individuals of the same species (all the same, example: all 7 th graders here) Community: all of the different species that interact in an ecosystem (every organism, example: all the 7 th and 8 th graders here)

5. Biotic & Abiotic Influences Abiotic Factors: the non-living physical and chemical components of an ecosystem e.g.rocks oxygen water sunlight

6. Biotic & Abiotic Influences Competition: two individuals vying for the same resource (biotic or abiotic) Food (biotic) Plants for light (abiotic) A water hole (abiotic) A mate (biotic)

7. Brain Break

8. Biotic & Abiotic Influences Sustainable Ecosystem: an ecosystem that is maintained through natural processes and can last forever with no help

9. Biotic & Abiotic Influences Limiting Factor: any factor that restricts the size of a population e.g.biotic: availability of food abiotic: access to water

10. Biotic & Abiotic Influences Tolerance Range: the abiotic conditions within which a species can survive Key abiotic factors: -light availability -water availability -nutrient availability -temperature

11. Biotic & Abiotic Influences Carrying Capacity: the maximum population size of a particular species that a given ecosystem can sustain -carrying capacity is set by the influences of all the biotic and abiotic factors over a long period of time -sustainable populations live at or below their carrying capacity

12. Biotic & Abiotic Influences Carrying Capacity: the maximum population size of a particular species that a given ecosystem can sustain sustainable population

13. Biotic & Abiotic Influences Carrying Capacity: the maximum population size of a particular species that a given ecosystem can sustain Is human population growth sustainable?

14. The End