Section 3:  How Ecosystems Change

Chapter 5 Section 3 Presentation
File Size:	478 kb
File Type:	ppt

Download File

---

Key Terms:

• ecological succession
• primary succession
  
• secondary succession
  
• pioneer species
  
• climax community
  

Main Ideas:

• After a disturbance, organisms in an environment follow a pattern of change over time, known as ecological succession.
• Primary succession occurs on a surface where no ecosystem existed before.  Secondary succession occurs on a surface where an ecosystem exited before.
  
• Climax communities are made up of organisms that take over an ecosystem and remain until the ecosystem is disturbed again.