Chapter 6 Sections 6.3 and 6.4 Stability in the Ecosystem

1. Chapter 6Sections 6.3 and 6.4Stability in the Ecosystem

2. Stability • The measure of how easily an ecosystem is affected by a disturbance and how quickly it returns to its original condition after a disturbance.

3. Equilibrium • Is a state of balance. • The disrupted ecosystem will return to this state of balance or equilibrium.

4. Disrupted Ecosystem

5. Natural Rule • Species and whole ecosystems evolve and may die out, but new species and ecosystems can evolve to replace them.

6. Chaos Theory • Suggests that ecosystems may be sensitive to very small changes, and that the initial state of an ecosystem is crucial to its later development.

7. Human Impacts • Habitat destruction. • Introduction of invasive species. • Pollution of water, soil and air.

8. Section 6.4Land Biomes

9. Biome • A major type of ecosystem with distinctive temperature, rainfall, and organisms.

11. Biomes • 8 Terrestrial • Aquatic • Determined by water depth, nutrients, and nearness to land.

12. Desert Biome • Very little water. • Covers 25 % of Earth’s land surface.

13. Desert

14. Tundra • Little water. • Cold.

15. Tundra

16. Forest Biomes • Coniferous • Deciduous • Rain forest

17. Coniferous Forest

18. Deciduous Forest

19. Rain Forest

20. Grassland Biomes • Steppe • Prairie • Savanna

21. Steppe

22. Prairie

23. Savanna

24. Review • What are some of the human impacts on the environment? • Compare and contrast the three different types of forests.