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Of the total incident solar radiation th...

Of the total incident solar radiation the proportion of PAR is

A

About 70%

B

About 60%

C

Less than 50%

D

More than 80%

Text Solution

Verified by Experts

The correct Answer is:
C
The source of energy in all ecosystem is solar energy. About 50% of the solar energy incident over earth is present in PAR (Photosynthetically active radiation). About 1-5% of Incident solar radiation or 2-10% of PAR is captured by the photosynthetic organisms in the synthesis of organic matter (gross primary producitivity).
Roughly 20% of it is consumed in respiration so that net capture of energy ( net primary productivity ) is 0.8-4% of incident radiation or 1.6-8% of PAR.
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