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Dinosaurs Evolve (pioneer species)
The dinosaurs become the pioneer species of planet earth -
Dinsours are all evolved (climax community)
Dinsosaurs are the dominant species of planet earth (climax community) -
Earth starts to shift continents, changes form, and warms up (ecological succession)
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Meteor crashes the earth and wipes all all the dinosaurs (secondary succession)
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The Water cycle gives run-off water to the earth and puts out fires and the niutrients from the waters restore the earth and the ecosystem. (eutrophication)