A) gross primary productivity
B) secondry productivity .
C) net primary productivity
D) net productivity
Correct Answer: B
Solution :
Gross primary productivity Photosynthesis + Organic matter used in respiration during measurment period. Net primary productivity = Storage of organic in plant tissue in excess of respiration. Net productivity = Rate of storage of organic matter not used by heterotrophs. Net productivity = Rate of storage of organic matter not used by heterotrophs Net productivity = Gross productivity \[-\]Respiration/energy loss. Secondary productivity - It is the rate of storage of organic matter by consumers per unit area per unit time.
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