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Succession Notes

Succession Notes. Succession. The change in biological communities of an area over a long period of time. Types of Succession:. Primary Initial establishment & development of a community occurs on barren rock volcanic eruption, glacial retreat, pavement

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Succession Notes

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  1. Succession Notes

  2. Succession • The change in biological communities of an area over a long period of time

  3. Types of Succession: Primary Initial establishment & development of a community occurs on barren rock • volcanic eruption, glacial retreat, pavement Secondary Reestablishment of a community • remnants of previous community is still there • abandoned field, after fire, flood, or hurricane

  4. Stages of Succession: • Bare Rock • No soil, no available nutrients, no active life……not a community

  5. Stages of Succession: • Lichens&Mosses • Pioneer Species • First to colonize rocks • secrete acid onto rock which liberates nutrients that can be absorbed • catches wind-blown dirt • can take 100s to 1000s of years • very vulnerable to erosion • least diverse and least stable

  6. Stages of Succession: • Grasses & Shrubs • Early Succession Plants • don’t need deep soil • like full sun • shrubs move in and shade out grasses, killing them

  7. Stages of Succession: • Softwood • Midsuccession Plants • trees that need a lot of sunlight • Cedar, pine

  8. Stages of Succession: • MixedHardwood Mature Forest • deciduous trees; oaks, maples, hickories, beech • saplings are shade-tolerant for the first few years • when an adult tree dies it leaves a hole in the canopy • saplings race to the top, grow tall quickly-not wide then grow slowly • Most Diverse, least likely to erode, very productive • Dominant species is reproducing, therefore climax stage

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