What season does phytoplankton peak in the northern temperate zone?
a. Spring
b. Summer
c. Autumn
d. Winter
Where is phytoplankton the most productive?
a. Tropical latitudes
b. Temperate latitudes
c. North polar latitudes
d. Equator
ANS: A
Larger plankton bloom in temperate zones peak in Spring due to increasing lamination. There is
another smaller peak that occurs in Autumn to coincide with upwelling events. Information can be
found in the section Phytoplankton Productivity varies with Local Conditions.
ANS: B
The most primary productivity occurs at the temperate and southern subpolar regions. This is due to
plenty of dependable sunlight and moderate nutrient supply. Information can be found in the section
Phytoplankton Productivity varies with Local Conditions.