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Succession
Chapter 19
Section 2 Ecological Succession
Objectives
• Describe the process of succession.
• Contrast primary and secondary succession.
• Explain how mature communities develop.
Chapter 19
Section 2 Ecological Succession
Regrowth of a Forest
• Succession The replacement of one type of
community by another at a single place over a
period of time is called succession.
• The regrowth of a forest after a forest fire is an
example of succession.
• Succession takes place in all communities, not
just those affected by disturbances such as forest
fires.
Chapter 19
Section 2 Ecological Succession
Primary Succession
• Sometimes, a small community starts to grow in
an area where other organisms had not
previously lived.
• Over a very long time, a series of organisms live
and die on the rock. The rock is slowly
transformed into soil. This process is called
primary succession.
Chapter 19
Section 2 Ecological Succession
Chapter 19
Section 2 Ecological Succession
Secondary Succession
• Sometimes, a community is disturbed in some
way. If soil is left intact, the original community
may regrow through a series of stages called
secondary succession.
Chapter 19
Section 2 Ecological Succession
Chapter 19
Section 2 Ecological Succession
Ecological Succession
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Visual Concept
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Chapter 19
Section 2 Ecological Succession
Mature Communities and Biodiversity
• In the early stages of succession, only a few species
grow in an area. As a community matures, it may be
dominated by a well-adapted, slow-growing climax
species.
• The variety of species that are present in an area is
referred to as biodiversity. Having biodiversity helps
communities lessen the impact and spread of
disturbances such as insect invasions.
Chapter 19
Section 2 Ecological Succession
Mature Communities and Biodiversity,
continued
• Mature communities tend to have biodiversity. A
mature community simply has organisms that are well
adapted to live together in the same area over time.
Chapter 19
Cycles in Nature
Concept Map
Use the terms below to complete the concept map on
the next slide.
water cycle
decomposition
carbon cycle
photosynthesis
carbon
combustion
condensation
precipitation