The relationship between compensation depth and other biological factors

With the increase of ocean depth, the light transmission decreases gradually. Therefore, the oxygen produced by photosynthesis of phytoplankton gradually decreases. At a certain depth, the oxygen produced by phytoplankton photosynthesis is exactly equal to the oxygen consumed by biological respiration. This depth is called compensation depth. The luminosity at this depth is called compensation luminosity. Strictly speaking, due to the different types and physiological states of phytoplankton, the compensation luminosity is not consistent. Generally, phytoplankton can multiply in the shallow water layer with compensation depth, so this water layer is called production layer. In the water layer below the compensation depth, although phytoplankton also carry out certain photosynthesis. However, because plants consume more energy than they store, phytoplankton will soon die. Occasionally, the maximum number of diatom plankton appears in the water layer below the compensation depth, but it does not breed in this water layer, but is settled by the water layer above the compensation depth.