Warm Up

Primary Succession Secondary Succession

Complete the following Venn Diagram in your composition book. It should be assignment # 15 (after the Foldable [1st] or Comparison Chart [3rd, 6th, 7th])

Ecological Succession• Succession – gradual development of a community over time.• Huge areas of Yellowstone National Park were burned in 1988

(left). By the spring of 1989, regrowth was evident in the burned parts of the park (right).

Primary Succession

• Development of a community where no other organisms had previously lived.– No soil– Bare rock– Slow transformation– Ex: Volcanic islands, retreating glaciers

• Pioneer species – the first organisms to live in an area.– Ex: lichen, mosses

Primary Succession

Secondary Succession

• Occurs when an existing community is destroyed by a natural disaster, such as fire, flood, or other habitat destruction.

• Usually shorter than primary succession– Soil is present for plants to develop

Secondary Succession

Climax Community

• Climax community - is a biological community of plants and animals which, through the process of ecological succession, has reached a steady state.