A niche is the role of an organism, population, or species in an ecological community comprising its usage of resources, its unique way of life, and its relationship to other biotic and abiotic factors. A fundamental niche is an organism or population's potential role, while the realized niche is the roles actually performed by the organism or population in the community. The concept of a guild is used to keep niches from overlapping and to avoid competition through character displacement, such as the Galapagos finches having different beaks to eat different foods.
Work Step by Step
A niche is the roles performed by an organism or population in a community, and niche competition is avoided by 'guilds'.