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Succession

Succession. Changes in a community. Aim: How does succession occurs in an ecosystem? . Do now: Observe the picture and explain what happened in the ecosystem:. Succession.

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Succession

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  1. Succession Changes in a community

  2. Aim: How does succession occurs in an ecosystem? • Do now: Observe the picture and explain what happened in the ecosystem:

  3. Succession • Succession is the sequence of biotic changes that regenerate a damaged community or create a community in a previously uninhabited area. • Primary succession is the establishment and development of an ecosystem in an area that was previously uninhabited. • The first organisms that live in a previously area are called pioneer species.

  4. Primary succession

  5. Secondary succession • Secondary succession is the reestablishment of a damaged ecosystem in an area where the soil was left intact. • Plants and other organisms that remain start the process of regrowth. • Secondary succession is cause by a disturbance such as a fire or a hurricane. • There is no end to secondary succesion.

  6. Secondary succesion

  7. Steps of succesion • 1. Bare rock is exposed by a retreating glacier, or when lava cools. • 2. Lichen and mosses spores are blown in by wind. • 3. Seeds are blown into the area. Small flowers and shrubs grow from the seeds. • 4. Small trees take root and different animals move into the area. • 5. Different trees species grow in the area and rewplace the original trees.

  8. Succession

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