Download Populations 4

Changes in Communities
• Succession- The series of
predictable changes that occur in a
community over time.
• Pioneer Species- The first species
to populate an area.
Changes in Communities
•
Primary Succession – series of changes that occur in an
area where no soil or organisms exist.
•
A new island formed by a volcanic eruption
Changes in Communities
•
Secondary Succession – series of changes that occur in an
area where the ecosystem has been disturbed.
•
Caused by fire, hurricanes, and tornadoes