Question

Why are there fewer phytoplankton in the mesopelagic zone relative to the epipelagic zone?

Lower light levels
Lower oxygen levels
Lower nutrient levels
Lower water temperature

Answer 1

There werefewer phytoplankton in the mesopelagic zone relative to the epipelagic zone because of lower light levels.

Answer 2

There are fewer phytoplanktons in the mesopelagic zone because of LOWER LIGHT LEVELS. It is the area of the ocean that is just below the epipelagic zone. This area of the ocean extends from a depth of 200 to 1000 meters.