The biodiversity intactness index

A guide for the Biodiversity Intactness Index (BII), a scientific metric used to estimate the remaining health of local ecosystems. This index functions as a percentage-based score, comparing the current abundance of species in a specific area to a pristine, pre-human baseline. The document outlines the methodological foundation of the tool, which relies on the vast PREDICTS database and statistical modeling to track how different land uses impact biological variety. Beyond technical calculations, the source explores how the BII is used by policymakers and businesses to monitor global sustainability targets and assess environmental risks. It specifically highlights the index's role in the planetary boundaries framework, noting that humanity has already fallen below the recommended 90% safety threshold for ecological integrity. Overall, the guide serves as a practical manual for integrating standardized biodiversity data into international conservation strategies and corporate reporting.