2. As one organism feeds off of another, the within the organism being fed upon is being transferred to the feeder. FOOD CHAIN energy

3. LEVELS WITHIN A FOOD CHAIN PRODUCERS FIRST ORDER CONSUMERS SECOND ORDER CONSUMERS

4. PRODUCE R - autotroph Gross Primary Productivity producers Rate at which the producers in the ecosystem capture energy & make sugar Basically, this means how much photosynthesis is going on….

5. (Dayton)

6. CONSUME R - heterotroph TYPES :

7. HERBIVOR E - eat producers TYPES :

8. Carnivore - eat other consumers TYPES :

9. Omnivore - eat consumers & producers TYPES :

11. DETRIVOR E consumer that feeds on the recently dead TYPES :

12. DECOMPOSE R consumer puts nutrients back into the soil

13. ENERGY TRANSFER BUT a LARGE fraction of the energy is lost energy is transferred from one organism to another in a food chain

14. It is LOST as HEAT!!!

15. So then, how does the energy move through an ecosystem?

16. Pyramid of Energy (kilocalories)

17. So then, how does the energy move through an ecosystem? Pyramid of Energy (kilocalories) 100% producers

18. So then, how does the energy move through an ecosystem? Pyramid of Energy (kilocalories) 10% 1st order consumers

19. So then, how does the energy move through an ecosystem? Pyramid of Energy (kilocalories) 1% 2nd order consumers

20. Pyramid of Energy Pyramid of Energy 90% decrease at each trophic level 10% useable energy WHERE DID THE ENERGY GO??

21. It is LOST as HEAT!!!

22. Pyramid numbers (how much prey @ each level) So then, how do the numbers of organisms in an ecosystem relate to the levels?

23. Pyramid numbers (how much prey) 1,500,000

24. So then, how do the numbers of organisms in an ecosystem relate to the levels? Pyramid numbers (how much prey) 200,000

25. So then, how do the numbers of organisms in an ecosystem relate to the levels? Pyramid numbers (how much prey) 90,000

26. So then, how do the numbers of organisms in an ecosystem relate to the levels? Pyramid numbers (how much prey) 2

27. Pyramid of Numbers Pyramid of Numbers Illustrates total # of organisms at each trophic level

28. Pyramid of Numbers Pyramid of Numbers This does NOT take into account the SIZE of the organism

29. So then, how does the amount living stuff (dry mass) - potential food, move through an ecosystem? Pyramid biomass (grams / m 2 )

30. Pyramid biomass (grams / m 2 )

32. FOOD chain

33. FOOD WEB

35. Energy moves through the arrows!

36. The food web is a simplified way of understanding the process by which organisms in higher trophic levels gain energy by consuming organisms at lower trophic levels.

37. Energy moves through the arrows!