During ecological succession

Moderate

A

the numbers and types of animals remain constant
B

the changes lead to a community that is in near equilibrium with the environment and is called pioneer community
C

the gradual and predictable change in species composition occurs in a given area
D

the establishment of a new biotic community is very fast in its primary phase

Solution

During ecological succession the gradual and predictable change in species composition occurs in a given area.
The species that invade a bare area are called pioneer species.
The changes lead to a community that is in near equilibrium with the environment and is called climax community.
As succession proceeds, the numbers and types of animals and decomposers also change.
The establishment of a new biotic community is generally slow.

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