Consider the following statements regarding the productivity of an ecosystem: 

i. Gross primary productivity is the rate of formation of organic matter by consumers.

ii. Net primary productivity is the variable biomass available for consumption to heterotrophs.

 

The correct answer is:

Analysis of the Statements Statement i is Incorrect: Gross Primary Productivity (GPP) is the rate at which producers (like plants and algae) capture solar energy and convert it into chemical energy through photosynthesis. It is not about consumers. The formation of organic matter by consumers is actually called Secondary Productivity.