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UNIT 2 LESSON 4 REVIEW - E & E. 1. Secondary succession… A) occurs before a disturbance. B) occurs after a disturbance and the soil does not remain intact. C) occurs after a disturbance and the soil stays intact. D) occurs over a short period of time.
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1. Secondary succession…A) occurs before a disturbance.B) occurs after a disturbance and the soil does not remain intact.C) occurs after a disturbance and the soil stays intact.D) occurs over a short period of time.
2. The types of plants that are considered as pioneer species are all except… • Lichens • Hardwoods • Grasses • Annuals
3. Which of the following is/are considered disturbances? Forest fire Flood Climate changes None
4. The intermediate stage in secondary succession includes… • Hardwoods • Softwoods • Lichens • Annuals
5. When hardwoods are scene, this is the ____________________stage in secondary succession. • Pioneer • Intermediate • Climax • Intermittent
The variety of organisms in a given area over a period of time is called… • Biology • Pioneer species • Bioluminous • Biodiversity
Ecosystems… • constantly change in different ways over time. • never changes once it’s established. • never changes unless a disturbance happens. • always changes except for the secondary succession stage.
8. Pioneer species… • can break down rocks into soil. • can be lichens. • can include annuals. D) all of the above.
What is it called when nutrients and plants take over an aquatic ecosystem? ____________________________________ 10. What two organisms make up lichens? ___________________&_________________ 11. Fires and floods that destroy an ecosystem are called _______________________________.
The very first species are called _______________________species. • What happens to the soil depth as the ecosystem develops in secondary succession? ___________________________________ • What is the mature and established stage called in secondary succession? ______________
