1. Chapter 3 Changes in Ecosystems Science 10 - Biology

2. Natural Selection The process in which, over time, the best- adapted members of a species will survive and reproduce. This process makes change in living things possible.

3. Adaptive Radiation The development of a number of new species from a common ancestor; the new species are adapted to inhabit different niches.

4. Succession Primary succession Secondary succession

5. 1. Primary Succession No soil

8. 2. Secondary succession Has soil

9. 1.Primary succession in pictures...

19. VS.

20. What are the differences?

22. POP QUIZ

23. Is this an example of: A) primary succession B) secondary succession C) Bioremediation D) Adaptive radiation

25. An example of the first pioneer species? A) moss B) lichen C) deciduous trees D) coniferous trees

26. An example of a pioneer species would be: A) moss B) lichen C) deciduous trees D) coniferous trees

27. Summary As succession increases in time –# of species…………………………increases –Total population……………………increases –Total Biomass………………………increases –Organic Matter……………………...increases

28. Volcano Life After People

29. Humans Influence on Ecosystems???

30. Humans Influence on Ecosystems…