20june2019 paper1 Q48
0. Oligotrophic lakes are characterized by:
- Option : B
- Explanation : Standing bodies of fresh water are often
divided into categories that reflect levels
of biological production. On the basis of
biological production the water bodies are
divided into Oligotrophic lakes, Eutrophic
lakes and Mesotrophic lakes.
Oligotrophic lakes are those that are unproductive: net primary production is only between 50 and 100 milligrams of carbon per square metre per day, nutrients are in poor supply, and secondary production is depressed.
