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Chapter 4 Section 2 Vocabulary
Biotic factors
The biological influences on organisms
within an ecosystem.
Abiotic factors
Physical or nonliving factors that shape an
ecosystem .
The full range of physical and biological
conditions in which an organism lives and
the way in which the organism uses those
Any necessity of life.
A rule stating that no two species can
occupy the same niche in the same habitat
at the same time.
An interaction in which one organism
captures and feeds on another organism.
Competitive exclusion principle
Ecological succession
Primary succession
Pioneer species
Secondary succession
Any relationship in which two species live
closely together.
Both species benefit from one another.
One member of the association benefits
and the other is neither helped nor
One organism lives on or inside another
harming it.
The series of predictable changes that
occur in a community over time.
Succession that occurs on surfaces where
no soil is present.
When primary succession begins, there is
no soil just ash and rock, the first species
to populate the area.
When a disturbance is over, community
interactions tend to restore the ecosystem
to its original condition in this process.
The biotic and abiotic factors that affect
where an organism lives.