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Succession

Succession. Succession is the gradual change in an ecosystem in which one biological community is replaced by another. Pioneer Species are the first living things to move into a barren environment. Primary Succession. Occurs after a glacier, volcano, Little or no topsoil is left

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Succession

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  1. Succession

  2. Succession is the gradual change in an ecosystem in which one biological community is replaced by another. • Pioneer Species are the first living things to move into a barren environment.

  3. Primary Succession • Occurs after a glacier, volcano, • Little or no topsoil is left • Takes hundreds of years for everything to grow fully back.

  4. Stage 1 • Moss and lichen grow on rock with little or no soil. These pioneer species break apart the surface rock.

  5. Stage 2 • Over time, the rock breaks down further, forming soil. Larger plants take root. These support populations of animals.

  6. Stage 3 • Larger trees take root in a deep layer of soil. A diversity of plants and animals are supported in this habitat.

  7. Secondary Succession • Occurs after a forest fire, deforestation, • Soil remains after the disturbance • Does not take as long as primary succession to grow back

  8. Stage 1 • Plants at the surface are burned; however, below the surface seeds and some plant roots survive.

  9. Stage 2 • Grasses and small shrubs sprout among the charred trees and vegetation.

  10. Stage 3 • Larger trees like elm and maple grow and mature. A forest habitat is reestablished. More animals are supported.

  11. Succession video • http://www.youtube.com/watch?feature=endscreen&NR=1&v=AWwe0udewD8

  12. Succession Song • http://www.youtube.com/watch?v=rzE6BNNLew0&feature=related

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