1. Ecosystems

2. Primary producers Sun

3. Ecosystems Primary consumers Secondary consumers Primary producers Sun

4. Ecosystems Primary consumers Secondary consumers Primary producers Sun

5. Ecosystems Detritus Primary consumers Secondary consumers Primary producers Sun

6. Ecosystems Detritus Primary consumers Secondary consumers Primary producers Sun

7. Ecosystems Microbes and other detritivores Detritus Primary consumers Secondary consumers Primary producers Sun

8. Detritus Ecosystems Primary producers Primary consumers Secondary consumers Microbes and other detritivores Sun

9. Detritus Ecosystems Primary producers Primary consumers Secondary consumers Microbes and other detritivores Sun

10. Primary production is the amount of light energy converted to chemical energy (organic compounds) during a given time period Ecosystems

11. Primary production is the amount of light energy converted to chemical energy (organic compounds) during a given time period. Ecosystems

12. Gross primary production (GPP) is the amount of light energy converted to chemical energy by photosynthesis per unit time. Ecosystems

13. Net primary production (NPP) is equal to GPP minus the energy used by the primary producers for respiration (R) NPP = GPP – R Ecosystems

14. Net primary production (NPP) is equal to GPP minus the energy used by the primary producers for respiration (R) NPP = GPP – R Ecosystems IMPORTANT

15. GPP can be measured in: EnergyJ/m 2 /yr Biomass g/m 2 /yr Ecosystems

16. GPP can be measured in: EnergyJ/m 2 /yr Biomass g/m 2 /yr Biomass is dry weight and includes only new mass. Ecosystems

17. Limitations on primary production: Light Nutrients (N, P, Fe) Ecosystems

18. Limitations on primary production: Light Nutrients (N, P, Fe) Iron is important for cyanobacteria, and cyanobacteria fix nitrogen in the oceans Ecosystems

19. Limitations on primary production: Light Nutrients (N, P, Fe) Iron is important for cyanobacteria, and cyanobacteria fix nitrogen in the oceans. Eutrophication is overgrowth of algae in lakes and ponds. Ecosystems

20. Evapotranspiration is a measure of temperature and moisture Ecosystems

21. Evapotranspiration is a measure of temperature and moisture. Ecosystems NPP (g/m 2 /yr) Evapotranspiration (mm)

22. Production efficiency is a measure of energy transfer between trophic levels Ecosystems

23. Production efficiency is a measure of energy transfer between trophic levels net secondary production assimilation of primary production Ecosystems efficiency = -------------------------------

24. Production efficiency is a measure of energy transfer between trophic levels calories eaten calories stored Ecosystems efficiency = -------------------------------

25. Production efficiency is a measure of energy transfer between trophic levels calories eaten calories stored Usually less than 20% Ecosystems efficiency = -------------------------------

26. Production efficiency is a measure of energy transfer between trophic levels Ecosystems

27. Production efficiency is a measure of energy transfer between trophic levels Ecosystems

28. Production efficiency is a measure of energy transfer between trophic levels. Ecosystems

29. Pesticides get magnified as they travel up through trophic levels. Ecosystems

30. Pesticides get magnified as they travel up through trophic levels. Ecosystems

31. Pesticides get magnified as they travel up through trophic levels. Ecosystems

32. Pesticides get magnified as they travel up through trophic levels. Ecosystems

33. Pesticides get magnified as they travel up through trophic levels. Ecosystems

34. Biogeochemical cycles Ecosystems

35. Detritus Ecosystems Primary producers Primary consumers Secondary consumers Microbes and other detritivores Sun

36. Detritus Ecosystems Primary producers Primary consumers Secondary consumers Microbes and other detritivores

37. Detritus Ecosystems Primary producers Primary consumers Secondary consumers Microbes and other detritivores Abiotic reservoir Geologic processes

38. Important cycles: Water Carbon Nitrogen Phosphorus. Ecosystems

39. Math Review rB > C

40. Math Review rB > C ΔN K - N ------- = rN (-----------) Δt K

41. Math Review rB > C net secondary production assimilation of primary production efficiency = -------------------------------------- ΔN K - N ------- = rN (-----------) Δt K