A biome's primary productivity refers to the rate at which organic matter is produced by photosynthetic organisms, such as plants and phytoplankton, in a particular habitat. It is a key measure of the energy available to support the entire ecosystem, influencing the trophic dynamics and overall biodiversity within the biome. High primary productivity often correlates with rich biodiversity due to the abundant resources available for various organisms. Understanding primary productivity is essential for ecologists when studying energy flow and nutrient cycling in different ecosystems.