Ecosystem Ques 4
4. In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
[2020]
(a) Gross primary productivity is always more than net primary productivity
(b) Gross primary productivity and Net primary productivity are one and same
(c) There is no relationship between Gross primary productivity and Net primary productivity
(d) Gross primary productivity is always less than net primary productivity
Show Answer
Answer : a
Hints & Solutions
(a) Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis. Net primary productivity is GPP-respiration. Hence, gross primary productivity is always more than NPP. The highest net primary productivity in terrestrial environments occurs in swamps and marshes and tropical rainforests; the lowest occurs in deserts.
BETA
