The Sampled Red List Index (SRLI)
The conservation status of less than 2.5% of the world’s described biodiversity is currently known. Clearly this limits understanding of the impact of humans on biodiversity, and with it the ability to make informed decisions on conservation planning and action. One of the major challenges for The IUCN Red List is assessing the larger groups that represent the majority of the world’s biodiversity.
The Sampled Red List Index is a new initiative to broaden the taxonomic coverage of The IUCN Red List in order to better represent biodiversity, provide increased species data coverage, enable a better understanding of biodiversity status and trends, and to identify key regions and taxa that require greater conservation attention.
Calculating the Index
The Sampled Red List Index is an indicator of the relative rate at which the conservation status of certain species groups change over time.
IUCN Red List Categories and Criteria
All our SRLI species are assessed using the IUCN Red List Categories and Criteria.
Broadening species coverage
The IUCN Red List currently comprises conservation assessments for nearly 50,000 species. Around 60% of these are vertebrates.
Partners & collaborators
The SRLI would not be possible without a wide network of partners and collaborators.