A species that has decreased until almost endngered id considered?

A species that no longer exists is considered?

The term used to describe the wide variety of life on Earth is?

A species that may become extinct if its population decreases further is concedered?

A condition that controls the size or growth of a population is called a?

When a community has stabilized and succession has slowed down or stopped, it is a?

The gradual replacement of one community by another is called?

The first species to establish themselves in a lifeless area form a?