Ecology: Succession CP Biology

Succession Constant changes in ecosystems in response to natural and human disturbances

Primary Succession Volcanoes – lava flows Glaciers expose rock No soil present

Primary Succession, cont. Pioneer Species - First species that appears in such a barren environment Lichens form on rock and break it down to create soil Mosses and grasses Tree seedlings and shrubs, etc. Climax Community – a stable fully mature ecosystem

Primary Succession, cont.

Secondary Succession An environment is disturbed without removing the soil Plowed field is abandoned Forest Fires

Secondary Succession, cont.

Secondary Succession, cont. Mosses Tree Seedlings, shrubs, etc. Climax Community

Secondary Succession, cont.