Chapter 2 Section 2 succession Succession Gradual development

Succession Gradual development of a community over time Two types: ◦ Primary ◦ Secondary

Primary Succession Growth in a place where no other growth has occurred before Generally

Stages of Primary Succession �Lichens are usually first. These are pioneer species �Acid from

Lichens Hardwoods Moss Softwoods Ferns Wildflowers and grasses

Secondary Succession Takes place after an existing community is destroyed or abandoned and the

Crabgrass Hardwoods Horseweed Softwoods and shrubs

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Chapter 2 Section 2 succession

Succession Gradual development of a community over time Two types: ◦ Primary ◦ Secondary

Primary Succession Growth in a place where no other growth has occurred before Generally no soil Begins on bare rock

Stages of Primary Succession �Lichens are usually first. These are pioneer species �Acid from lichens break down rock into soil �Mosses grow replacing lichens �Ferns grow replacing mosses �Grasses grow replacing ferns �Wildflowers, small trees, and shrubs begin to grow �Soil gets deep enough to support forests

Lichens Hardwoods Moss Softwoods Ferns Wildflowers and grasses

Secondary Succession Takes place after an existing community is destroyed or abandoned and the soil is still intact Crabgrass grows first New weedy plants like horseweed grows Small bushes and trees grow – softwoods ex. pine Hardwoods (ex. Oak) replace softwoods

Crabgrass Hardwoods Horseweed Softwoods and shrubs

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