Summer productivity in temperate waters typically is hampered by a strong thermocline.
Step-by-step explanation:
Silica is discharged by the disintegration of siliceous hard parts after the demise of the living being, yet this is a moderate procedure and silica is quickly moved beneath the thermocline. At the point when silica is accessible in the surface layer and different supplements and light are adequate to help photosynthesis, diatoms, as a rule, overwhelm the phytoplankton.
At the point when silica is drained din flagellates, which needn't bother with silica, typically become predominant. In this way, din flagellates are prevailing where there is a solid lasting thermocline and in mid-scopes during summer when there is a solid occasional thermocline.