Transcript Secondary Succession

Ecology Lesson 5
What is the difference between primary and
secondary succession?
Do Now
Have you ever observed a vacant lot or an
untended garden over time? What changes
did you see?
Essential Question
What is the difference between primary and
secondary succession?
Vocabulary
Succession
The series of predictable
changes that occur in a
community over time.
Primary
Series of changes that occur in
succession
an area where no soil or
organism exist.
Pioneer species First species to grow in an area
with little or no soil.
Secondary
succession
Series of changes that occur in a
area where the ecosystem has
been disturbed, but soil and
organisms still exist.
Assignment
1. Read pages 32-35.
2. Complete the diagram.
Summarization Activity
• What is primary Succession?
Do Now
• Review your diagrams from yesterday.
Definition
Examples
Primary Succession
Stages
Definition
Examples
Series of changes that occur 1. New islands formed by
in an area where no soil or
the eruption of
organism exist.
volcanoes
2. Area of rock uncovered
by melting sheets of ice
1.
2.
3.
4.
Primary Succession
Stages
Volcanic eruption.
Pioneer species inhabit
the land.
Soil is formed.
Fertile soil and maturing
plants
Definition
Examples
Secondary Succession
Stages
Definition
Series of changes that occur
in a area where the
ecosystem has been
disturbed, but soil and
organisms still exist.
Examples
1.
2.
3.
4.
Fires
Hurricanes
Tornadoes
Human activity- farming,
logging, mining
Secondary Succession
1.
2.
3.
4.
Stages
Grasses and wildflowers
take over field.
Pine seedlings and other
plant replace grasses.
A forest develops
Mature trees
Assignment
• With a partner and using your diagrams,
write an explanation to contrast primary
and secondary succession.
Explanation
student examples
Answer the essential question
What is the difference between primary and
secondary succession?
Homework
• Read Changes in the Communities.
• Complete explorer page 72-73.
..\..\Ecology\ecology\72-73.doc
Summarization Activity
• Complete explorer page 74.