The Species Protection Index (SPI) is a measure used to quantify how well a defined area is doing to protect the native species living in their area. The SPI can be applied to nation states to calculate a National Species Protection Index (NSPI) The NSPI appears on the Half-Earth Project National Report Cards and Half-Earth Project Map along with other measures that rank how well various countries are doing when it comes to biodiversity stewardship.
« Back to Glossary Index
A million species could go extinct by the end of the century. With your help, we will leave no species behind.
©2024, E.O. WILSON BIODIVERSITY FOUNDATION, HALF-EARTH PROJECT and HALF-EARTH DAY are registered trademarks of the E.O. Wilson Biodiversity Foundation, Inc. ALL RIGHTS RESERVED. EIN: 20-4547380
