1. Energy Flow Through an Ecosystem
Food Chains, Food Webs, Energy Pyramids

2. 6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2
Begins with the SUN
Photosynthesis
6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2

3. Organisms that can make glucose during photosynthesis are called PRODUCERS.

4. Producers use most of the energy they make for themselves.

5. The energy that is not used by producers can be passed on to organisms that cannot make their own energy.

6. Energy Transfer decreases at each trophic level
Why doesn’t each organism have the same amount of energy available to them?
A: Because most of the energy is used up by the organism being consumed:
90% OF INCOMING ENERGY IS USED BY THAT ORGANISM
ONLY 10% IS AVAIABLE FOR THE NEXT

7. Energy gain/loss in a trophic pyramid

8. Organisms that cannot make their own energy are called CONSUMERS.

9. Consumers that eat producers to get energy:
Are first order (1st) or primary consumers
Are herbivores (plant-eaters)

10. A Consumer that Eats Another Consumer for Energy:
Is called a secondary or 2nd order consumer
May be a carnivore or a omnivore
May be a predator
May be a scavenger

11. A consumer that eats a consumer that already ate a consumer:
Is called a 3rd order or tertiary consumer
May be a carnivore or a omnivore
May be a predator
May be a scavenger

12. Consumers that eat producers & other consumers
Are called omnivores
Omnivores eat plants and animals

13. Consumers that hunt & kill other consumers are called predators
Consumers that hunt & kill other consumers are called predators. The animals that are hunted & killed are called prey.

14. Consumers that eat other dead consumers are called scavengers

15. The transfer of energy from the sun to producer to primary consumer then to higher order consumers can be shown in a FOOD CHAIN.

16. Food Chains Show Available Energy

17. More Food Chains

18. Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID

20. Food Webs: Are interconnected food chains
They show the feeding relationships in an ecosystem

21. How Many Chains are in this web?

22. Identify the Producers, Consumers, & Decomposers:
Count the Food Chains!