1. 13.2 Biotic and Abiotic Factors Every ecosystem includes both living and nonliving factors.

2. 13.2 Biotic and Abiotic Factors Biodiversity - the variety of living things in an ecosystem. Rain forests contain more than 50% of the world’s species.

3. 13.2 Biotic and Abiotic Factors Biotic factors are living things. –plants –animals –fungi –bacteria plants

4. 13.2 Biotic and Abiotic Factors Abiotic factors are nonliving things. –moisture –temperature –wind –sunlight –soil –water moisture sunlight

5. 13.2 Biotic and Abiotic Factors Producers (autotrophs) – make their own food. get their energy from non-living resources. (sun) provide energy for other organisms in an ecosystem

6. 13.2 Biotic and Abiotic Factors Consumers (heterotrophs)- organisms that get their energy by eating other living or once-living resources.

7. 13.2 Biotic and Abiotic Factors Chemosynthesis – process in which an organism forms carbohydrates using chemicals instead of light. carbon dioxide + water + hydrogen sulfide + oxygen sugar + sulfuric acid