1. Biogeochemical Cycles Mr. Skirbst Life Science Topic 19

2. Cycles

3. Daily Rhythms

4. Cycles Daily Rhythms diurnal – active at day

5. Cycles Daily Rhythms diurnal – active at day nocturnal – active at night

6. Cycles Lunar Rhythms

7. Cycles Lunar Rhythms tides – high / low monthly cycles

8. Cycles Annual Rhythms

9. Cycles Annual Rhythms seasonal changes

10. Cycles Annual Rhythms seasonal changes migration – annual movement from breeding to feeding grounds

11. Cycles Annual Rhythms seasonal changes hibernation – winter resting state (Latin: hibernus – “winter”)

12. Cycles Annual Rhythms seasonal changes estivation – summer resting state (Latin: aestivus – “summer”)

13. Cycles of Matter Flow of matter (chemicals) from non-living (abiotic) to living (biotic) parts of an ecosystem, and back again

14. Cycles of Matter Water Cycle: - evaporation (liquid to gas)

15. Cycles of Matter Water Cycle: - evaporation - condensation (gas to liquid) (cloud formation)

16. Cycles of Matter Water Cycle: - evaporation - condensation - precipitation (rain, snow, sleet, hail, fog)

17. Cycles of Matter Water Cycle: - evaporation - condensation - precipitation - infiltration / runoff (groundwater, streams, oceans)

18. Water Cycle

19. Cycles of Matter Oxygen – Carbon Cycle:

20. Cycles of Matter Oxygen – Carbon Cycle: - photosynthesis (producers: take CO 2  O 2 )

21. Cycles of Matter Oxygen – Carbon Cycle: - photosynthesis (producers: take CO 2  O 2 ) - respiration (consumers: take O 2  CO 2 )

22. Carbon – Oxygen Cycle

23. Cycles of Matter Nitrogen Cycle:

24. Cycles of Matter Nitrogen Cycle: - fixation: bacteria change “free” N from air to N- compounds in soil

25. Cycles of Matter Nitrogen Cycle: - metabolizing: N-compounds moved from soil to plants to animals

26. Cycles of Matter Nitrogen Cycle: - decomposition: bacteria “free” N back to air again

27. Nitrogen Cycle

28. Cycles of Change Ecological Succession: - gradual change from one community to another

29. Cycles of Change Ecological Succession: - gradual change from one community to another Climax Community:

30. Cycles of Change Ecological Succession: - gradual change from one community to another Climax Community: - a stable community of organisms

31. Cycles of Change Ecological Succession: