What does primary productivity measure?%0D%0A%0D%0A%0D%0Athe rate at which phototrophs make organic matter%0D%0A%0D%0A%0D%0Athe number of consumers that make up a food web%0D%0A%0D%0A%0D%0Ahow producers carry out photosynthesis%0D%0A%0D%0A%0D%0Ahow energy moves from organism to organism
Primary productivity measures the rate at which phototrophs (organisms that use sunlight for energy) convert inorganic substances into organic matter through photosynthesis. This provides the energy and nutrients for the rest of the ecosystem, ultimately influencing the number of consumers in a food web and how energy moves through the ecosystem.
