Proposed species extinction target fails to capture the diversity in biodiversity

David O'Brien, Margaret Hunter, Martin Breed, Laura Bertola, Rob Ogden, Clarisse Palma-Silva, Ivan Paz-Vinas, Gernot Segelbacher, Sean Hoban, Rodolfo Jaffe

Research output: Contribution to journalLetter


We believe the 20 species extinction metric is a retrograde proposal, which does not adequately consider the lessons learnt from the 2020 Aichi Biodiversity Targets. Whilst having a single simple overarching target is appealing, we believe a positively-framed target will garner support, rather than one that aims to, at best, limit negative impacts. The Convention on Biological Diversity’s zero draft states that future targets should be clear, consistent and SMART (Specific, Measurable, Achievable, Relevant and Timely).
Original languageEnglish
Number of pages1
Publication statusPublished - 13 Aug 2020


  • species extinction
  • diversity
  • biodiversity


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