Describe how events and processes that occur during ecological succession can change populations and species diversity What is ecological succession orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is estab ID: 1018695
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1. ECOLOGICAL SUCCESSIONObj: 11DDescribe how events and processes that occur during ecological succession can change populations and species diversity.
2. What is ecological succession?orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established
3. What differences do you see in these pictures?
4. TornadosHurricanesForest firesVolcanoesFloodsWhat disasters could affect the plant population?
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6. Climax CommunityThe ideal end community in any given ecosystemhttps://www.youtube.com/watch?v=iZA5yfrzLV8&feature=player_embedded
7. Primary SuccessionOccurs on bare rock or hardened lava on which no soil organisms existBeings with arrival of lichens, a pioneer species
8. Pioneer SpeciesAble to grow on barren rockFirst organisms to grow during primary successionEx: lichens, mosses
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10. Secondary SuccessionOccurs after an event in which the ecosystem is damaged, but not destroyed. Because soil remains, secondary succession is faster than primary succession
11. On Hwy 31 going to Kilgore…
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14. How long is the time?
15. https://www.youtube.com/watch?feature=player_embedded&v=4RsMyVavT2Q
16. Succession also in bodies of water
17. large deep lakesshallow pondsgrassland
18. How does succession affect population size?Forest fire or volcanic eruption will decrease population and diversityIf the soil is intact, over time, the populations will recoverEx: insects deposit eggs in the soil & these eggs can survive and hatch after a fire
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20. Animals that survived may move to other regions which reduced competition for other speciesCan lead to entirely new ecosystems if new herbivores move in where there were once none. Eventually carnivores will move in to eat new herbivores.How does succession affect population diversity?
21. How do population and species diversity change as succession progresses?Population size and species diversity both increase during ecological successionOver time, more species are able to survive and become established
22. Smaller producers are replaced by larger ones, such as small trees and shrubsAs insects increase, birds and other animals that eat insects arriveEventually a climax community will build again
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