-Primary productivity is the rate at which energy is stored by photosynthetic activity of producer organisms, in the form of organic substances that can be used as food material.
-In some marine ecosystems where there is no light, there are chemoautotrophs, which make glucose from carbon dioxide and hydrogen sulphide in the water rather than the sun’s energy.
marto answered the question on March 20, 2019 at 10:29
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