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SUCCESSION
Changes in the environment
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Disturbances:
Events that change a communityCan alter resourcesCan destroy or remove organisms
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Stability:
The ability of a community to resist disturbancesThe greater the biodiversity, the greater the stability
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Ecological Succession:
Gradual sequential changes of a communityCan be primary or secondary
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Primary Succession:The start of a community in a place where there was no lifeExamples: a new island forms or a volcanic eruption covers a community with lava
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Pioneer species are the first organisms to live in a new area
Pioneer species are small, hardy, and grow quickly
Primary succession is a very slow process!
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Secondary Succession:
Occurs after a disturbance, either natural or man-made
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In secondary succession, soil remains and some
species are able to survive.
This type of succession is much faster. It may only take 100 years in some cases.
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Climax Communities:The stable endpoint of successionThere is very little change