BIOLOGY Packet 9: Ecology Textbook pages: 62-137 At the end of this unit, the students will be able to: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. Identify the levels of organization that ecologists study. Identify the source of energy for life processes. Trace the flow of energy through living systems. Evaluate the efficiency of energy transfer among organisms in an ecosystem. Describe how matter cycles among the living and nonliving parts of an ecosystem. Explain why nutrients are important in living systems. Describe how the availability of nutrients affects the productivity of ecosystems. Identify the causes of climate. Explain how Earth’s temperature range is maintained. Identify Earth’s three main climate zones. Explain how biotic/abiotic factors influence an ecosystem. Identify interactions that occur within communities. Describe how ecosystems recover from a disturbance. Identify the factors that govern aquatic ecosystems. Identify the two types of freshwater ecosystems. Describe the characteristics of the marine zones. List the characteristics used to describe a population. Identify factors that affect population size. Differentiate between exponential and logistic growth. Identify factors that limit population growth. Describe how the size of the human population has changed over time. Explain why population growth rate differ in countries throughout the world.