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Primary Succession Defined: Establishment and development of an ecosystem in an uninhabited environment Volcanic lava creates new land Glaciers retreating.

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Presentation on theme: "Primary Succession Defined: Establishment and development of an ecosystem in an uninhabited environment Volcanic lava creates new land Glaciers retreating."— Presentation transcript:

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3 Primary Succession Defined: Establishment and development of an ecosystem in an uninhabited environment Volcanic lava creates new land Glaciers retreating exposing new land

4 Bare Rock Lava cools and hardens into rock

5 Pioneer Species Defined: First organisms to inhabit new land Moss and lichen grow on bare rock Dead matter accumulates with rock pieces –Thin soil layer begins to accumulate

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7 The Process Continues Seeds enter the area and grow Small flowers & shrubs accumulate more organic matter With new plants, small animals inhabit the area

8 The Process Continues Small trees take root in the accumulated organic matter More animals use the trees as a habitat

9 Climax Community Large trees take root –Overcrowd and out-compete the original smaller trees New animals inhabit new forests

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11 Secondary Succession Changes that take place after a disturbance occurs in an established ecosystem –Forest fires, floods, tree falls… Faster scale (soil preexists)

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18 review 1)What are the first organisms to live within a newly created patch of land called? 2)Give examples of the answer to question #1. 3)What are the final organisms to live within a newly created patch of land called? 4)How are new areas of land created? 5)Give a few examples how the process of secondary succession can start. 6)How does primary and secondary succession differ?


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