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Moderate

Net Primary Productivity (NPP) of Ecosystems

APES-BFHDET

"The Flow of Energy: Primary Production to Higher Trophic Levels." Introduction to Global Change. University of Michigan, n.d. Web. 31 Mar. 2016. http://www.globalchange.umich.edu/globalchange1/current/lectures/kling/energyflow/energyflow.html.

The graph above compares average net primary productivity (NPP) for various ecosystems around the world.

If the respiration of an estuary is $79,200\text{ kcal}/\text{m}^{ 2 }/\text{yr}$, what is the gross primary productivity of the ecosystem in $\text{ kcal}/\text{m}^{ 2 }/\text{yr}$?

A

$8,800\text{ kcal}/\text{m}^{ 2 }/\text{yr}$

B

$800\text{ kcal}/\text{m}^{ 2 }/\text{yr}$

C

$88,000\text{ kcal}/\text{m}^{ 2 }/\text{yr}$

D

$7,920 \text{ kcal}/\text{m}^{ 2 }/\text{yr}$

E

$7,200\text{ kcal}/\text{m}^{ 2 }/\text{yr}$