The impact of primary productivity on the food web is significant because it serves as the foundation of energy flow within ecosystems. Primary producers, such as plants and phytoplankton, harness solar energy to synthesize organic matter, supporting higher trophic levels of consumers. This productivity directly influences the abundance and diversity of species within food webs. Ecosystems with higher primary productivity typically support more complex food webs and greater biodiversity. Understanding these relationships is essential for managing ecosystems and ensuring their sustainability in the face of environmental changes.