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13 - Ecological Succession

13 - Ecological Succession

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Tags: biology   high school   ecology  

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Primary Succession
bare rock

soil formation

rock exposed by glacier receding

pioneer species = lichens & mosses




starts with no biodiversity

Secondary Succession

an ecosystem has existed here before

forest fire

flood




starts with soil

pioneer species = weeds and small plants

starts with some biodiversity

Both
ends in a climax community

starts with small plants and animals

gradual change in the biodiversity of an area over time

smaller plants and animals are replaced by larger plants and animals