Butchart, Stuart H. M., Crowe, Olivia, Scott, Tom, Plumptre, Andrew J., Eldred, Megan, McKee, Ellen, Waliczky, Zoltan, Hasani, Ibrahim Al, Azpiroz, Adrián B., Baisero, Daniele, and others. (2026) Extent, characteristics and policy applications of Key Biodiversity Areas. Biological Reviews, . Article Number 70144. ISSN 1464-7931. E-ISSN 1469-185X. (doi:10.1002/brv.70144) (KAR id:113166)
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| Official URL: https://doi.org/10.1002/brv.70144 |
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Abstract
A global standard for the identification of Key Biodiversity Areas (KBAs) was published 10 years ago to provide a unified set of criteria for identifying ‘sites of significance for the global persistence of biodiversity’. We review the initiative's origins, the KBA identification process, characteristics of the current network, threats, policy uptake, private sector applications and future priorities. KBAs are identified using criteria with quantitative thresholds relating to threatened or geographically restricted species or ecosystems, ecological integrity, biological processes, or irreplaceability. These criteria can be applied in terrestrial, inland water, marine and subterranean environments, and to all taxonomic groups. A total of 16,596 KBAs covering 22.1 million km2 has been identified, with 29% of these sites in marine and 26% in freshwater ecosystems. KBAs range from 0.001 km2 to 712,457 km2 in extent, with a median size of 141 km2 and a mean of 1,364 km2. Most (63%) qualify due to the globally threatened species they support, with 48% being important for biological processes and 39% for geographically restricted species. KBAs have been identified for 18,365 qualifying species in total, of which 37% are plants and 32% are birds. The most prevalent threats are biological resource use (hunting, logging, fishing, etc., impacting 40.8% of sites with available data), unsustainable agriculture (40.7%), human intrusions and disturbance (38.4%) and natural systems modifications (water management and fire; 33.4%). KBAs are important for delivering ecosystem services to people, both locally and globally. KBAs have had widespread impact in informing protected area designation in all regions. In total, 10,054 sites (62%) are covered completely or partially by protected areas. Hence, KBAs are highly relevant to Target 3 (and other targets) in the Kunming–Montreal Global Biodiversity Framework, and to Sustainable Development Goals 14.5, 15.1, and 15.4. Indicators based on KBA data are therefore being used by the Convention on Biological Diversity and United Nations to track progress towards these targets. Many companies and financial institutions use KBAs to assess their exposure to nature‐related risks and to identify opportunities for site‐level, nature‐positive actions. Future priorities include expanding and updating KBA assessments, and strengthening efforts to protect, conserve and safeguard these sites effectively.
| Item Type: | Article |
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| DOI/Identification number: | 10.1002/brv.70144 |
| Uncontrolled keywords: | protected areas; Convention on Biological Diversity; Sustainable Development Goals; Kunming‐Montreal Global Biodiversity Framework; conservation; IUCN Red List |
| Subjects: | Q Science > QH Natural history > QH75 Conservation (Biology) |
| Institutional Unit: | Institutes > Durrell Institute of Conservation and Ecology |
| Former Institutional Unit: |
There are no former institutional units.
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| Funders: | University of Kent (https://ror.org/00xkeyj56) |
| SWORD Depositor: | JISC Publications Router |
| Depositing User: | JISC Publications Router |
| Date Deposited: | 26 Feb 2026 12:47 UTC |
| Last Modified: | 02 Mar 2026 12:32 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/113166 (The current URI for this page, for reference purposes) |
University of Kent Author Information
Juffe Bignoli, Diego.
| Creator's ORCID: |
 https://orcid.org/0000-0002-1498-4317
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