Energy Flow Through Ecosystems

AP Biology· difficulty 4/5

A forest's gross primary productivity is 2000 g C/m²/yr; autotrophic respiration is 800 g C/m²/yr. NPP equals

A
$2000$
B
$1200$
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C
$2800$
D
$800$

Explanation

NPP = GPP - R_autotroph = 2000 - 800 = 1200 g C/m²/yr. The C actually available for growth and consumers.

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