7th Grade

1

• 7th Grade
• Unit 2
• Ecosystems
• Lesson 3
• Succession and Equilibrium
• Vocabulary of Instruction

2
Climax Community

• Is a stable group of plants and animals that is
  the end result of the succession process.

Climax Community
3
Equilibrium

• Is the condition of a system in which competing
  influences are balanced

4
Pioneer Species

• Are those organisms, usually plants, that
  colonize barren rock or lava during primary
  succession.
• Examples
• Mosses
• Lichens
• Ferns
• weeds

Mosses
Lichens
Weeds
Ferns
5
Primary Succession

• Is the earliest phase of ecosystem development.

6
Secondary Succession

• Describes the changes in the kinds of plants and
  animals that live in a particular community over
  time.

7
Succession

• Directional, orderly process of change in a
  living community in which the community modifies
  the physical environment to eventually establish
  an ecosystem which is as stable as possible at
  the site in question.