Chapter 5 section 3
The gradual process of change and
replacement of the types of species in a
occurs on a surface
where no life has
Rocks, cliffs and sand dunes.
– The first
area and start
Example of Pioneer Species:
– LICHENS: break down rocks into soil so other
plants can grow.
–A final and
The more common type of succession.
Occurs on a surface where an ecosystem
Occurs in an area that has been disrupted
by man or natural processes as storms,
fire, flood or earthquake.
Fire and Secondary Succession
Fires caused by lightening are necessary
part of secondary succession.
– Some trees need fire to release seeds.
– Minor fires remove accumulations of brush
– Some organisms feed on plants that sprout
after minor fires.
Old Field Succession
Occurs after farmers stop
cultivating a field.