Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. scientific concepts
5. physical sciences concepts
6. earth sciences concepts
7. biomes

Anotations

Scope note:

Biomes surrounding freshwater environments, defined as having a low salt concentration of less than 1%. Plants and animals in freshwater regions are adjusted to the low salt content and would not be able to survive in areas of high salt concentration.