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Understanding Primary and Secondary Succession in Ecosystem Development

This section delves into the intricate processes of primary and secondary succession, highlighting how communities develop over time. Primary succession occurs in lifeless areas where no soil exists, starting with pioneer species like lichens that gradually create soil from bare rock. This is followed by stages of plant growth, ranging from mosses to hardwood forests. In contrast, secondary succession takes place in previously disturbed areas where soil remains intact, allowing for quicker regrowth of communities, beginning with plants like crabgrass and horseweed. Gain insights into these vital ecological processes.

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Understanding Primary and Secondary Succession in Ecosystem Development

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  1. Chapter 2 Section 2 succession

  2. Succession • Gradual development of a community over time • Two types: • Primary • Secondary

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

  4. 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

  5. Lichens Ferns Moss Wildflowers and grasses Softwoods Hardwoods

  6. 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

  7. Horseweed Crabgrass Softwoods and shrubs Hardwoods

  8. Ad Campaign • Create a logo

  9. Ad Campaign • Create a slogan • Like a good neighbor • We’ll leave the light on • When it absolutely, positively has to be there overnight • Made from the greatest stuff on earth • Head for the border • Get the sensation

  10. Ad Campaign • Create a print ad

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