Think About It

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Think About It

• What happens to an open field after a major fire
  has destroyed the area?
• After a volcanic eruption, and new land is formed
  will life exist here again?

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Ecological Succession

• Write the information that is in BLUE in your
  notebook

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Ecological Succession

• How do communities change over time?

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Ecological Succesion

• Definition predictable changes that occur in a
  community over time

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Causes of Ecological Succession

• Natural and human disturbances
• Older organisms move out new move in
• Wildfires, floods, melting of glaciers

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Types of Ecological Succession

• Primary Succession
• Secondary Succesion

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Primary Succession
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Primary Succession

• First growth of community
• No soil exists on surface
• Happens on bare rock after volcanic lava cools
  and forms rock
• Happens after glacier melts and exposes rock

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Human Disturbance
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Secondary Succession
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Secondary Succession

• Second growth of community
• Happens after a disturbance (wildfire, abandoned
  cleared land)
• SOIL remains in community after disturbance

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Order of succession

• 1- Pioneer species first communities to appear
• 2- Intermediate species
• 3- Climax Community- final communities

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Organisms of Succession

• Primary Succession (on rock)
• Lichens?moss? grass? small shrubs?
• soft trees? hardwood trees
• Secondary Succession (on soil)
• Small plants? grasses, perrenials?shrubs, soft
  trees (pine)? mature forest (oak, hickory)

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Succession is Good? Bad?

• Succession Good? promotes growth in a community,
  returns nutrients to the soil after disturbance
  (wildfire)
• Succession Bad? established communities are
  destroyed, takes a long period of time to build
  climax community

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SUCCESSION TAKES A LONG TIME

• SUCCESSION TAKES A LONG TIME
• SUCCESSION TAKES A LONG TIME
• SUCCESSION TAKES A LONG TIME
• SUCCESSION TAKES A LONG TIME
• SUCCESSION TAKES A LONG TIME

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Succession in Water
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Summary Questions

• How long does succession take?
• Two types of ecological succession are
• First species to develop in succession are
• Primary succession occurs on
• Secondary succession occurs on

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Comparison T- chart

• Create a T- chart that compares the following
  features of succession
• Causes
• Begins with
• Type of pioneer species
• Length of time

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T-chart
Primary Succession Secondary Succession
Causes
Begins with
Type of Pioneer species
Length of Time