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What is the definition of gross primary productivity (GPP) in an ecosystem?

Options

  1. AThe rate of production of organic matter during photosynthesis
  2. BThe rate of formation of new organic matter by consumers
  3. CThe rate of biomass production
  4. DNone of the above

Correct answer

A. The rate of production of organic matter during photosynthesis

Step-by-step solution

A constant input of solar energy is the basic requirement for any ecosystem to function and sustain. Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. It is expressed in terms of weight (g m–2) or energy (kcal m–2). The rate of biomass production is called productivity. It is expressed in terms of gm–2 yr –1 or (kcal m–2) yr–1 to compare the productivity of different ecosystems. It can be divided into gross primary pro

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