Section 14.3 Succession & Sustainability

1. Section 14.3 Succession & Sustainability

2. Agenda • Review chapter 13 & 14 • Section 14.3 Succession & Sustainability • Homework: Pg 619: Practice review questions • Qn 1-10, 16, 18, 20, 25, 30, 31, 35, 36 • Self Assessment on Page 624

3. Introduction Eventually a community of trees may establish themselves. The ordered change of plants in an ecosystem is called succession.

4. Plants as Ecosystem Pioneers Forest Fire Northern Forest Secondary Succession after a fire • The above pictures show a healthy forest overcome by a forest fire.  Although forest fires are devastating and may mean a loss of vegetation, wildlife, and property, they also result in ecosystem renewal.  • The ash-rich soil is very fertile and within weeks new seeds take root.  After few years, there may be bushes and trees.  The gradual successive change in plant life is called succession.

5. 2 types of successions • Primary succession : occurs in areas where there is no soil. For example, primary succession occurs on barren rock where lichens first colonize the rock. Mosses may follow the lichen. • Organisms that can survive extreme conditions and invade these abiotic habitats are called pioneer organisms.  • After some soil has been established, secondary succession can occur. • Secondary succession is the gradual change seen in plant life where soil already has been established.

7. Succession cont’d.. Succession occurs over a very long time period and organisms must compete to survive. It is marked by interspecific competition (competition between species) and intraspecific competition (competition within the same species).

8. Climax Community Succession stops when species composition changes no longer occur with time, and this community is said to be a climax community (mature ecosystem).

9. How does the way we live affect the Earth? Leads to Global warming Restoration Deforestation Climate change Pollution Disturbs nature

10. Renewable resources a natural resource that can be replaced through biological or other natural processes E.g. Water, sunlight

11. Non-renewable resources is a natural resource which cannot be produced, grown, or generated E.g. coal, petroleum, oil and natural gas

14. Average Canada and Canadian cities Footprint

15. Earth’s biological capacity

16. Other nation’s footprint

18. Sustainability Animation

19. Get involved!! • Engage your friends • encourage to take the ecological footprint quiz • Involve society • Write a letter to your local government representative. • Join Environmental stewardships

20. Get involved : Research

21. How can you reduce school’s Eco footprint? • Plant a tree or a garden • Implement natural methods like composting and natural pest control • Create a backyard or schoolyard habitat • Create a walking Wednesday campaign

22. Our planet • Our planet • Our planet with reduced ecological footprint • Our planet without ESD.

23. Let’s test your knowledge

28. GREAT DOCUMENTARY: Life after people video FYI http://www.youtube.com/watch?v=RuPKjH4q9lk