Glossary term(s): ecosystem service protection of species threatened species Summary: Trends in extinction risk and populations of species that provide essential services Explore content Specific Indicator 14.2.3 : Species Habitat Index (species that provide essential services) Specific Indicator 14.2.1 : Red List Index (species used for food and medicine; pollinating species) Specific Indicator 14.2.2 : Living Planet Index (utilized species)