Energy Flow in Ecosystems

1. Energy Flow in Ecosystems 3.2 Energy, Producers, & Consumers 3.3 Energy Flow in Ecosystems

2. AutoTrophs AKA Primary Producers • ________________ make their own food • Another name?________________ • What process? _________________ • Light energy powers chemical reactions and converts CO2 to O2 • What organisms? _______________ ____________________ ____________________

3. What if there’s no light? • Some primary producers harness chemical energy from inorganic molecules such as hydrogen sulfide. They use chemical energy to produce carbohydrates in a process known as _____________________________! • Where? _____________________________________

4. Heterotrophs Aka consumers • Obtain energy? • ________________________ • Herbivore- _____________ • Carnivore - _____________ • Omnivore - ______________

5. Who are these guys? • Decomposers – chemically break down organic matter to make detritus (small pieces of dead and decaying plant and animal remains. Ex________________________________ • Detritivores – feed on detritus and commonly digest decomposers. EX____________________________________ • Scavengers- consume carcasses of others. EX_____________________________________

6. Food Chain • Steps in which organisms transfer energy by eating and being eaten. • Each step in the transfer of energy through an ecosystem is called a trophic level.

7. Aquatic Food Chain • ______________________: Floating algae and is a primary producer. • __________________: small swimming animals • EX: Krill

8. Food Web

9. Ecological Pyramid • Shows amount of energy at each trophic level. 10% of energy is passed on. • Where does the rest go? Nomalactivity/lost as heat • ___________is the amount of living tissue at each tropic level.