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Primary vs. Secondary Succession
Transcript of Primary vs. Secondary Succession
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: