In an ecosystem,the amount of organic matter produced in a given time that is available for heterotrophs is known as
A)daily yield.
B)gross productivity.
C)net primary productivity.
D)effective vitality.
E)net yield.

Question

Quizplus · Accepted Answer

Net primary productivity (NPP) is the amount of organic matter produced in a given time by photosynthetic organisms, minus the energy they use during respiration. This is the energy available for heterotrophs, or consumers, in the ecosystem. Gross productivity (B) refers to the total amount of organic matter produced by autotrophs, including what they use up in cellular respiration. Daily yield (A) and net yield (E) are not commonly used terms in ecology. Effective vitality (D) is not a widely recognized ecological concept.

In an Ecosystem,the Amount of Organic Matter Produced in a Given