1. What are some factors that affect the environment?
115
Ecological Succession
116
Ecological Succession
12/9/2014
12/9/2014
Application/Connection/Exit:
Notes: Glue here when done
Starter:
Ecological Succession in a Garden
ON Next Slide
Connection:
Succession Concept Map
Practice:
What are some factors that affect the environment?
Notes: Glue here when done
Exit:
Explain why secondary succession is important to an ecosystem?

2. STARTER
A science class was awarded a grant to start a garden at their middle school. The students chose an open area that was covered with grass. The first step in preparing to plant their garden was to remove the grass and till the soil. Once the area was cleared the students ordered their vegetable seeds. It took two weeks for the seeds to be delivered. After two weeks the students went out to their cleared area to plant their vegetable seeds. What do you think the students found when they visited their area after two weeks? Circle the answer that best matches your thinking.
Nothing has changed. The area looks the same as it did after removing the grass.
The grass has grown back so it must be removed again.
Weeds have taken over the area and are thriving.
Which statement do you agree with?

3. December 9, 2014 AGENDA Objective
1 Starter
Notes
Map
December 9, 2014 AGENDA
Objective
TEKS 7.10C observe, record, and describe the role of ecological succession such as in a microhabitat of a garden with weeds by completing notes and concept map.

4. Table of Contents Date Lecture/ Activity/ Lab Page
12/ Biomes Video
12/2 Biodiversity Lab
12/3 Biodiversity Reading
12/4 Biome Biodiversity Poster
12/ Biodiversity Writing
12/ Island Rat
12/ Ecological Succession

5. Ecological Succession Notes

6. The environment is constantly changing as a result of weather or the activities of humans & other organisms.

8. These changes can naturally happen slowly over time or quickly as a result of natural disasters or catastrophic events.

9. A community of organisms that occupy an area is also constantly changing and result in long-term changes in an ecosystem.

10. All of these changes that occur in an ecosystem over time result in ecological succession.

11. Primary succession occurs in an area where no ecosystem existed.

12. Examples: after a volcanic eruption or bare rock under a glacier.

13. The first species to populate an area during primary succession, called pioneer species…

14. …are usually mosses or lichens which are able to grow on bare rock… release acids that begin to break down rock to create soil.

15. As colonies of grasses & ferns are established, small animals will move into the area that feed on the plants.

16. Larger animals can then move in & feed on the smaller animals.

17. More soil is formed that can support larger plants like shrubs which can provide new habitats for more animals.

18. More soil continues to form & become richer & deeper so that trees can now be supported & the community continues to grow.

19. Given enough time and the right conditions, primary succession may lead to a community in equilibrium that will not change drastically unless the ecosystem is disturbed.

20. This type of community is known as a climax or mature community.

21. Secondary succession occurs after a disturbance in an existing ecosystem where soil is already established so weeds and grasses can start to grow immediately.

22. Examples: after forest fires, tornadoes, hurricanes, floods, etc…

23. Secondary succession occurs more rapidly than primary succession to restore the ecosystem to a state of equilibrium that can be maintained over time.

24. Stages of primary succession: (forest) bare rock=> mosses / lichens => grasses & ferns=> bushes & shrubs=> trees (young forest) => mature forest (climax community)

25. Stages of primary succession
mosses & lichens
mature forest=> climax community
trees- young forest
bushes & shrubs
grasses & ferns
bare rock
Time

26. Stages of secondary succession: (forest) weeds=> grasses & ferns=> bushes & shrubs=> trees (young forest) => mature forest (climax community)

27. Stages of secondary succession
mature forest=> climax community
bushes & shrubs
trees- young forest
grasses & ferns
weeds
Time

28. What are some factors that affect the environment?
115
Ecological Succession
116
Ecological Succession
12/9/2014
12/9/2014
Application/Connection/Exit:
Notes: Glue here when done
Starter:
Ecological Succession in a Garden
ON Next Slide
Connection:
Succession Concept Map
Practice:
What are some factors that affect the environment?
Notes: Glue here when done
Exit:
Explain why secondary succession is important to an ecosystem?