Energy Flow through Living Systems

1. Energy Flow through Living Systems

2. Ecosystem A system consisting of all the interactionsthat occur between the biotic (living)and abiotic (Non-living)factors within an environment. Tundra Freshwater Desert

3. Producers • Autotrophic (Make their own food) organisms • Go through photosynthesis-Use radiant energy to produce their food • Glucose = Chemical Energy= Stored Energy What are some examples you can think of?

4. Consumers • Consume their food energy by eating producers or other consumers • Herbivore – eat plants (producers) ex-? • Carnivores – eat other consumersex-? • Omnivores – eat producers and other consumers ex-?

5. Decomposers • Break down decaying organic matter Ex:

6. Food Chain -Diagram showing the directional flow of energy from the Sun to producers to consumers -The arrows in a food chain represent the flow of energy Energy goes to Energy goes to Example: Energy goes to Grass  Mouse  Snake  Hawk ** You MUST include the ARROWS!**

7. Overlapping food chains with different pathways for the flow of food energy in a ecosystem Food Web Energy goes to Energy goes to Energy goes to Energy goes to Energy goes to Energy goes to

8. Energy Pyramid HEAT Shows the energy amount that moves from one trophic level to another 90% of energy is lost Tertiary Consumers - Carnivores 1 KCAL HEAT 10% 90% of energy is lost Secondary Consumers – Carnivores and Omnivores 10 KCAL Energy Flow HEAT 10% 90% of energy is lost HEAT Primary Consumers - Herbivores 100 KCAL 90% of energy is lost 10% of energy is passed on Producers 1,000 KCAL Most available energy

9. Made of several food chains • Complex • One organism may occupy more than one trophic level • More complex food webs improve the stability of an ecosystem • Single Pathway • Simple • Organisms occupy only one trophic level • Isolated food chains decrease the stability of an ecosystem • Start with • the sun • Show the flow of energy • Show a relationship in an Ecosystem Food Chain Food Web