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SUCCESSION Changes in the environment Disturbances: Events that change a community Can alter resources Can destroy or remove organisms Stability: The ability of a community to resist disturbances The greater the biodiversity, the greater the stability Ecological Succession: Gradual sequential changes of a community Can be primary or secondary Primary Succession: The start of a community in a place where there was no life Examples: a new island forms or a volcanic eruption covers a community with lava 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! Secondary Succession: Occurs after a disturbance, either natural or man-made 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. Climax Communities: The stable endpoint of succession There is very little change