The role of symbiosis in ecosystems is significant, as it describes the various interactions between different species that can benefit, harm, or have no impact on one another. Symbiotic relationships can be classified into three main types: mutualism (both species benefit), commensalism (one benefits while the other is unaffected), and parasitism (one benefits at the expense of the other). These interactions enhance ecosystem stability, contribute to biodiversity, and help regulate population dynamics within communities. Symbiosis is essential in nutrient cycling and energy flow.