The ________ Region of an Oligotrophic Lake Extends to About

Question

The ________ region of an oligotrophic lake extends to about 10 meters below the surface.
A) neuston
B) benthic
C) epilimnion
D) hypolimnion
E) euphotic

Accepted Answer

The epilimnion is the uppermost layer of a lake characterized by warmer water and high levels of oxygen. In oligotrophic lakes, which are nutrient-poor, this layer may extend to about 10 meters below the surface. The neuston refers to organisms living at the surface film of the water, the benthic region is the bottom of the lake, and the hypolimnion is the colder, deeper layer in a lake. The euphotic zone refers to the layer of water where light is sufficient to allow for photosynthesis by algae and other aquatic plants.