Species that can be used as a early indicator of environmental degradation to a community or an ecosystem. Compare with immigrant species, keystone species, and native species.

any species that determines a characteristic of its environment, such as range or ecological health.

a species that works like an indicator plant: its population and health reveal much about its ecosystem.

A species whose status provides information on the overall condition of the ecosystem and of other species in that ecosystem. They reflect the quality and changes in environmental conditions as well a [..]

a species whose presence or absence reflects on the quality of that environment

A plant or animal species related to a particular kind of environment. Its presence indicates that specific habitat conditions are also present.

a specific species selected for monitoring by animal scientists in order to get a general indication of the health of the ecosystem in which the animal lives.

A species whose status provides information on the overall condition of the ecosystem and of other species in that ecosystem.

a species that reveals some characteristic in an environment.  In aquatic systems, indicator species usually tell scientists something about the quality of the water.

species that serve as early warnings that a community or an ecosystem is being degraded.

any biological species that defines a trait or characteristic of the environment.

Species whose presence indicates certain environmental conditions .