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Mrs. Keadle JH Science Name______________________________ Period_____ Date Assigned____________ Date Due____________ Date Returned __________ Succession Power Point Notes Directions: Using the Succession Power Point, answer the following questions. 1. What did these events do to the earth?_________________________________________ _________________________________________________________________________ 2. How did the events do this? __________________________________________________ _________________________________________________________________________ 3. What part of the earth was affected? ___________________________________________ _________________________________________________________________________ 4. What differences were there between the two events? ____________________________ _________________________________________________________________________ 5. Ecosystems try to maintain _______________________________. Equilibrium is a state of _____________________________. Major events can upset the equilibrium: ____________________, ________________, ___________________________, _______________________. 6. Succession is a series of predictable ___________________ that occur in a community over time. 7. Succession allows and area to _________________________ after a catastrophic event. 8. Succession begins with a _____________________________ species. 9. Once equilibrium is reached, it is called a ______________________ community. 10. Climax communities are ____________________________ for each area. 1 Succession Power Point Notes Mrs. Keadle JH Science PRIMARY SUCCESSION 11. Primary succession occurs on an area of newly exposed ______________, _____________, ___________________, or any area that has not been occupied by a living community. 12. Primary succession takes a very _______________________ time. 13. Steps of primary succession a. ________________________ species come in. Mosses and _____________________ help to break down the rock to form soil. b. Plant __________________ come in on birds, animals, wind or water and begin to ______________________. c. Eventually, __________________________ succession will lead to a community of organisms in _____________________________. 14. Example of Primary Succession. Complete the chart with the correct description. STEPS OF PRIMARY SUCCESSION 1. 2. 3. 4. 5. 2 Succession Power Point Notes Mrs. Keadle JH Science Other examples of primary succession: 3 Succession Power Point Notes Mrs. Keadle JH Science SECONDARY SUCCESSION 15. Secondary succession is a series of changes that occur after a disturbance to an _______________________________ ecosystem. 16. Occurs ___________________________ than primary succession because there is already __________________________________. 17. Example of Primary Succession. Complete the chart with the correct description. STEPS OF SECONDARY SUCCESSION 1. 2. 3. 4. 4 Succession Power Point Notes Mrs. Keadle JH Science 21 Years after the lava from an erupting volcano destroyed an area, grasses started to grow in that area. The grasses were gradually replaced by shrubs, evergreen trees, and finally, by a forest that remained for several hundred years. The entire process is an example of - 22 F feedback G ecological succession H plant preservation J deforestation A volcanic eruption covers a wide area of forest with ash, lava, and volcanic rock. Which of these describes the first stage of ecological succession that will begin to return biotic factors to the forest community and return it to a state of equilibrium? A The volcano stops erupting. B The lava cools to form rock. C Lichens grow on the rocks. D The rock melts back into lava. 5 Succession Power Point Notes Mrs. Keadle JH Science 23 How does secondary succession help restore equilibrium to a region destroyed by a flood? F It increases the number and types of species. G It brings back species from extinction. H It stops other floods from occurring. J It decreases the rate of evolution. 25 24 The role of a pioneer species in primary succession is to change a bare habitat into one that is suitable for other organisms. A species that is responsible for primary succession in an ecosystem is MOST likely able to A survive any predator B migrate during the winter. C live at high altitudes. D carry out photosynthesis. Which of the following sequence MOST likely represents ecological succession on a recently abandoned wheat field? F grasses → flowering plants → shrubs → native trees G native trees → shrubs → flowering plants → grasses H shrubs → grasses → native trees → flowering plants J flowering plants → native trees → shrubs → grasses 6 Succession Power Point Notes Mrs. Keadle JH Science 26 A flower bed is created at a school so flowers can be planted in the Fall. Over the summer it is uncared for. Which of the following could the students expect to find when they come back to school? A B C D 7 Succession Power Point Notes Mrs. Keadle JH Science 27 Lichens and moss are the first 28 organisms to grow after a volcanic eruption. These organisms are known as F secondary species G primary species H pioneer species J succession species Why does secondary succession occur faster than primary succession? A Fewer changes must occur in secondary succession. B There are more pioneer species in secondary succession. C The environmental conditions are more extreme in primary succession. D 1 29 2 There are more trophic levels in secondary succession. 3 In which of the above scenes will secondary succession most likely occur? F 1 only G 2 only H 3 only J 1 and 3 8 Succession Power Point Notes