| In coastal marine waters, cyanobacteria are, conversely, responsible for most primary production in numerous oligotrophic environments. |
| An aquatic environment rich in phosphorus is considered to be eutrophic, whereas a phosphorus-poor area is considered oligotrophic. |
| The limits of oligotrophic and eutrophic conditions have been set in terms of the rate at which oxygen is depleted from the hypolimnion. |
| Misty lake is deeply stained, oligotrophic, and dense plant growths occur in the summer. |
| Given the dearth of nutrients in their environment, these oligotrophic bacteria must generate their energy from a variety of sources. |
| The centers of a raised bog consist of oligotrophic peat, the best quality fuel, not polluted by mineral substances such as clay or sand. |
