Indicators used to quantify biodiversity, such as current state and trends around species extinction, biodiversity footprints of industrial and financial sectors, and dependencies on biodiversity-related services. However, there is little consensus on which common metrics to use for assessing biodiversity impacts. While one biodiversity metric does stand out—the Biodiversity Intactness Index (BII), a percentage estimate of the original number of species that remain and their abundance in a given area—it only partially reflects human impact on Earth systems.
Source: Goedkoop, et al. (2023) Bridging the Gap; UK Natural History Museum (2025) Biodiversity Intactness Index.
