Download Ecological Succession

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?
Ecological Succession
• Write the information that is in BLUE in
your notebook
Ecological Succession
How do communities change over
time?
Ecological Succesion
• Definition: predictable changes that occur
in a community over time
Causes of Ecological Succession
• Natural and human disturbances
– Older organisms move out new move in
– Wildfires, floods, melting of glaciers
Types of Ecological Succession
• Primary Succession
• Secondary Succesion
Primary Succession
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
Human Disturbance
Secondary Succession
Secondary Succession
• Second growth of community
• Happens after a disturbance (wildfire,
abandoned cleared land)
• SOIL remains in community after
disturbance
Order of succession
• 1- Pioneer species: first communities to appear
•
2- Intermediate species
•
3- Climax Community- final communities
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)
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
SUCCESSION TAKES A LONG
TIME
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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 in Water
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…
Comparison T- chart
• Create a T- chart that compares the
following features of succession
– Causes
– Begins with…
– Type of pioneer species
– Length of time
T-chart
Primary
Succession
Causes
Begins with
Type of Pioneer
species
Length of Time
Secondary
Succession