Indicator species

Definition

Species whose presence, abundance, or absence can indicate the quality of its environment, particularly regarding pollution levels or habitat degradation.

Etymology

From Latin 'indicare', meaning 'to signal' or 'to point out'.

Example

The presence of stoneflies in a stream indicates a clean and healthy environment.

Related Terms

• Pollution tolerance
• Habitat degradation
• Biomonitoring

Usage Notes

Indicator species are often sensitive to environmental changes and can serve as early warning signs of ecological problems.