Ecological niches play a crucial role in biodiversity by defining the unique functions and roles that different species occupy within an ecosystem. Each species adapts to its niche, which includes factors like food sources, habitat preferences, and interactions with other organisms. This specialization reduces competition for resources, allowing multiple species to coexist and thrive in the same environment. Healthy ecosystems with varied niches support greater biodiversity and stability against disturbances. Understanding ecological niches is fundamental for conservation and ecosystem management, ensuring the preservation of species and their habitats.