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

2. 2 Begins with the SUNBegins with the SUN PhotosynthesisPhotosynthesis 6CO 2 + 6H 2 O + sunlight & chlorophyll  C6H 12 O 6 + 6O 2

3. 3 Organisms that can make their own food during photosynthesis are called Organisms that can make their own food during photosynthesis are called PRODUCERS (AUTOTROPHS).

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

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

6. 6 Organisms that cannot make their own energy are called CONSUMERS (Heterotrophs).

7. 7 Consumers that eat producers to get energy: Are first order (1 st ) or primary consumers Are herbivores (plant- eaters)

8. 8 A Consumer that Eats Another Consumer for Energy: Is called a secondary or 2nd order consumer Is called a secondary or 2nd order consumer May be a carnivore or a omnivore May be a carnivore or a omnivore May be a predator May be a predator May be a scavenger May be a scavenger

9. 9 A consumer that eats a consumer that already ate a consumer: Is called a 3rd order or tertiary consumer Is called a 3rd order or tertiary consumer May be a carnivore or a omnivore May be a carnivore or a omnivore May be a predator May be a predator May be a scavenger May be a scavenger

10. 10 Consumers that eat producers & other consumers Are called omnivores Omnivores eat plants and animals

11. 11 Consumers that hunt & kill other consumers are called predators. The animals that are hunted & killed are called prey.

12. Predator-Prey Relationship

13. 13 Consumers that eat other dead consumers are called scavengers

14. The transfer of energy from the sun to producer to primary consumer then to higher order consumers can be shown in a FOOD CHAIN. 14

15. 15 Food Chains Show Available Energy

16. 16 More Food Chains

17. 17 Food Webs: Are interconnected food chains Are interconnected food chains They show the feeding relationships in an ecosystem They show the feeding relationships in an ecosystem

18. 18 How Many Chains are in this web?

19. 19 Identify the Producers, Consumers, & Decomposers: Count the Food Chains!

20. Trophic Level Each Level In A Food Chain or Food Web is a Trophic Level. Producers Always The First Trophic Level How Energy Enters The System Herbivores Second Trophic Level 20

21. Trophic Level Carnivores/Omnivores Make Up The Remaining Trophic Levels Each level depends on the one below it for energy. 21

22. 22 Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID

23. 23 Energy Pyramids Show Amount of available energy decreases for higher consumers Amount of available energy decreases for higher consumers Amount of available energy decreases down the food chain Amount of available energy decreases down the food chain It takes a large number of producers to support a small number of primary consumers It takes a large number of producers to support a small number of primary consumers It takes a large number of primary consumers to support a small number of secondary consumers It takes a large number of primary consumers to support a small number of secondary consumers

24. 24

25. ENERGY PYRAMID 25

26. BIOMASS: total weight of living matter at each trophic level 26

27. CYCLES IN NATURE 27 Carbon Cycle

28. The Nitrogen Cycle