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Primary vs. Secondary Succession

Primary vs. Secondary Succession and patterns of interaction of early and late species

Parul Rai

on 20 February 2013

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Transcript of Primary vs. Secondary Succession

Primary vs. Secondary Succession Parul Rai, Gerardo Romero, Ariella Tsfoni What is primary succession? According to the textbook, primary succession is "the initial establishment and development of an ecosystem." What is secondary succession? According to the textbook, secondary succession is "the reestablishment of an ecosystem where there are remnants of a previous biological community." Primary Succession Secondary Succession How are these forms of succession different? Sources Patterns of interaction of early and late species What species exist in these forms of succession? http://www.ehow.com/list_7248745_steps-primary-secondary-succession.html#ixzz2LNFWvjKG



http://www.hawar-islands.com/blog/media/blogs/kuwait/Beetles.jpg 1. Bacteria and lichens (such as fungi & algae) colonize bare rock
2. Algae photosynthesize and fungi absorb nutrients from the bare rock, so fungi are able to hold
3. Fungi and algae break down the rock matter.
4. Water freezes then thaws in the crevices of the broken down rocks.
5. Lichens die and accumulate in the cracks.
6. Mosses grow and die in the cracks and create fertile soil. (The soil is made from the broken rocks, decayed organisms, water, and air.) The community becomes stable unless further disturbed. Secondary succession occurs in ecosystems that previously existed and were destroyed by a natural disasters, such as forest fires. Plant life and soil is wiped out or damaged. Once wiped out, organisms begin to colonize any areas that are still habitable. Pioneer species begin to sprout new life. Plants, trees, flowers and shrubs begin to grow. There are no significant differences between the species found in a forest going through primary succession and one through secondary succession. Annual Plants:
mainly insects Grasses and Perennials:
mainly insects Grasses, shrubs, pines, young oaks and hickory:
small animals, such as birds and rodents Mature oak and hickory forests:
larger animals
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