Question

What is the net primary productivity of an algal bed if the gross primary productivity in an algal bed is 7 kcal/m2/yr and respiration is 3 kcal/m2/yr?

Answer 1

`NPP = 4\ kcal/m^2/yr`

Step-by-step explanation:

Given

`Gross\ Primary\ Productivity, GPP= 7\ kcal/m^2/yr`

`Respiration, R= 3\ kcal/m^2/yr`

Required

Determine the Net Primary Productivity (NPP)

NPP is calculated as follows;

`NPP = GPP - R`

Substitute values for GPP and R

`NPP = 7\ kcal/m^2/yr - 3\ kcal/m^2/yr`

`NPP = 4\ kcal/m^2/yr`

Hence, the Net Primary Productivity is
`4\ kcal/m^2/yr`