Download Ecological Succession

Ecological Succession
Review: Food Chains and Webs
Review: What is an ecosystem?
• Biological community (all different
species) and all the non-living factors
that affect it
• REMEMBER: Ecosystems are always
changing
Oak Tree Ecosystem
Ecological Succession
Definition: change in the ecosystem that
community
happens when one ____________
replaces another as a result of changing
__________
and __________
factors
biotic
abiotic
Two Types:
- Primary Succession
- Secondary Succession
Succession
disturbance in the
• Occurs following a ____________
ecosystem
• Succession is the sequence of
biotic
___________
changes that regenerate a
damaged community or a community in a
uninhabited
previously _____________
area
Primary Succession
• Establishment and development of an
ecosystem
______________
in an area that was
previously uninhabited
slowly
• Occurs very _______
• First organisms that live in a previously
pioneer
uninhabited area are called ___________
species
_________
Examples
• Bare rocksRocks erode, sand accumulates,
decomposition adds organic
matter soil. As soil continues to
form plants appear.
• Volcanic eruptions-
Following the eruption, there is NO life
in the blast zone. Eventually, however,
pioneer species do establish
themselves.
Primary Succession
Process can be started by melting glaciers, volcanic eruptions, landslides
Secondary Succession
damaged
• Reestablishment of a __________
soil
ecosystem in an area where _______
was
left intact
Examples
Fire
Examples
• Logging
Example
• Ocean boat
scraps bottom
Summary
• What is ecological succession?
• What are the two types?
• Describe the two types.