Ecology - Ecological Succession

Ecological Succession

• Ecological succession is the process of change in the species structure of an ecological community over time.

Primary vs. Secondary Succession

• Primary Succession (P):
  • Begins in a virtually lifeless area where soil has not yet formed.
  • Occurs on volcanic islands, on lava flows, and on rocks left by retreating glaciers.
  • Usually begins with the establishment of lichens.
• Secondary Succession (S):
  • Begins in habitats where communities were entirely or partially destroyed.
  • Occurs on abandoned cropland.
  • Succession in lakes and ponds.