Environmental Science: Section 2-2 Ecological Succession

Most were dead but still standing. 1. What was the condition of most trees in Yellowstone National Park after the summer forest fires in 1988? Most were dead but still standing.

2. After one year, the burned forest in Yellowstone National Park had begun to grow back.

3. What is the meaning of succession? A community growing over time

4. The first organisms to start a process of succession are called _______. Pioneer species

5. The types of organisms that are usually the pioneer species in primary succession are _________. Lichens

6. Over time, the remains of _____ add to the soil. Insects

7. What is usually present in an area where primary succession begins? no soil, and usually just bare rock.

8. How long does it take for an area of bare rock to become a forest? hundreds or thousands of years.

9. Secondary succession may occur in an area if soil is left intact after a major disturbance.

10. What is usually the first plant to grow in secondary succession? crab grass

11. In secondary succession, how long does it take for a forest to form? 100 years

12. What is the meaning of a mature community? A community with organisms well adapted to the area

13. What is a climax species? A slow-growing species that is well-adapted to an area over time.

14. Why is biodiversity important to communities of organisms? Biodiversity makes a community better able to survive disturbances such as insects and disease.

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