Multiple Choice
In the context of ecosystem production and efficiency, gross primary productivity (GPP) of an ecosystem is best defined as:
52. Ecosystems
Making Sense of Ecosystem Production & Efficiency
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If a capybara has a net production efficiency of 15% and consumes 1800 kJ of grass in a day, 1150 kJ of which is assimilated, roughly how much energy will be converted to new biomass?
A
120 kJ.
B
270 kJ.
C
77 kJ.
D
173 kJ.
Verified step by step guidance1
Understand that net production efficiency (NPE) is the ratio of energy converted to biomass to the total assimilated energy, expressed as a percentage.
Identify the given values: NPE is 15%, total energy consumed is 1800 kJ, and assimilated energy is 1150 kJ.
Calculate the energy converted to new biomass using the formula: Energy converted to biomass = (NPE / 100) * Assimilated energy.
Substitute the given values into the formula: Energy converted to biomass = (15 / 100) * 1150 kJ.
Perform the multiplication to find the energy converted to new biomass, which will give you the answer in kJ.
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