A key factor considered when measuring an ecosystem's biodiversity is species richness, which refers to the number of different species within a specific area. This metric helps ecologists assess the health and stability of the ecosystem. Higher biodiversity often indicates a more resilient ecosystem capable of withstanding environmental changes and human impacts. Other factors such as species evenness, the relative abundance of each species, are also important. High biodiversity contributes to ecological balance, provides resources, and enhances ecosystem services.