Because of their great diversity and specific ecological requirements, algae, particularly diatoms, make excellent indicators of water quality.

An indicator species has a narrow set of ecological requirements, therefore they become useful targets for observing the health of an ecosystem.

Myotis alcathoe is a rare species with narrow ecological requirements.

Its exact ecological requirements remain relatively poorly known.

Additional research is needed to examine the species' ecological requirements, so that the suitability of Eucalyptus plantations can be assessed.

The ecological requirements of the species, are those of the subtropical and temperate habitat areas.

However, it is not until all the ecological requirements of the location are satisfied that economic values of species are considered.

The ecological requirements of the species are similar to those of other species which form laurel forests.

Very little is known about the ecological requirements of this species.

It has been proposed to survey to determine its precise distribution and ecological requirements, and find suitable habitat to protect these birds.