Producers--Autotrophs

3210.2.1—Predict how population changes of organisms at different trophic levels affect an ecosystem.

Producers--Autotrophs • Use energy from the environment to make food • Main source of energy is sunlight (photosynthesis) • Some organisms rely on energy stored in inorganic compounds (chemosynthesis)

Consumers—Heterotrophs • Rely on other organisms for energy and food supply. • Herbivores—eat plants only • Carnivores—eat animals only • Omnivores—eat plants and animals • Detrivores—eat animal and plant remains • Decomposers—breaks down organic matter

Food Chain • A series of steps in which organisms transfer energy by eating and being eaten • Arrow points to what is eating • GrassAntelopeCoyote

Food Web • Links all the food chains in an ecosystem together

Trophic level • Each step in a food chain or food web • 1st level is always producers • Consumers make up the 2nd, 3rd or higher Tertiary consumer Secondary consumer Primary consumer Primary producer

Bozeman Video • Biotic and abiotic factors

Assignment • Create a food web for a particular biome (will be assigned from pgs. 100-104) • Most contain at least 5 food chains consisting of a producer, primary consumer and secondary consumer. Each consumer must be labeled as an herbivore, carnivore, omnivore or decomposer • At least one predator-prey relationship must be shown • At least 2 abiotic factors must be included and labeled

Producers--Autotrophs