From iucnrle.org - May 25, 2016 10:36 AM
Since 2008, many experts from around the world have been actively participating in the development of the categories and criteria for the IUCN Red List of Ecosystems (RLE). One of the latest products of this work is the publication of the IUCN’s "Guidelines for the application of IUCN Red List of Ecosystems Categories and Criteria." This document provides a theoretical, exemplified, updated and documented guide for the systematic application of the RLE’s categories and criteria.