Compared to Eutrophic Lakes, the Biochemical Oxygen Demand, or BOD

Question

Compared to eutrophic lakes, the biochemical oxygen demand, or BOD, of oligotrophic lakes is
A) low.
B) similar.
C) high.
D) unpredictable.
E) extremely high.

Accepted Answer

Oligotrophic lakes have a low nutrient content which leads to low levels of organic matter and thus a low BOD compared to eutrophic lakes which have a higher nutrient content and higher BOD.