Imagine that you are an ecologist who must determine whether an entire river and lake biome is being threatened by human activity. What might you look for in an indicator species?

The answer is; one that is most easily affected by changes in water quality

A biome is defined as the large ecological area where the formation of plants and animals with common characteristics gather due to the similar climates. If I were an ecologist, and i will be determining whether an entire river and lake biome is being threatened by human activity, the indicator species that i might look for are the ones that have been introduced into the biome.