Fungi play a crucial role in nutrient cycling within ecosystems. They decompose organic matter, breaking down complex compounds into simpler substances that can be absorbed by plants and other organisms. Fungi form symbiotic relationships with plant roots through mycorrhizal associations, enhancing nutrient uptake, especially of phosphorus. This interaction supports plant health and growth, which, in turn, sustains entire ecosystems. Additionally, fungi are essential in organic matter turnover and soil formation, contributing to the overall health and biodiversity of environmental systems.