Defining “Critical Biodiversity Areas”

The document argues that financial institutions (FIs) have a responsibility to stop financing activities that drive biodiversity degradation, particularly fossil fuel activities. It proposes a minimum foundation of scientific frameworks—centered on Key Biodiversity Areas (KBAs) and supplemented by marine and carbon-critical ecosystem frameworks—to define 'no-go zones' where fossil fuel projects should be strictly prohibited. The note emphasizes that existing protected area statuses are often insufficient for effective conservation and suggests the implementation of buffer zones (10 km terrestrial, 50 km marine) to mitigate the wider impact radius of fossil fuel activities.

• The document defines a critical biodiversity area as one where degradation would cause "irreversible or disproportionate loss of biodiversity" regarding species richness, diversity, ecological functions, or evolutionary potential.
• Key Biodiversity Areas (KBAs) are identified as the most robust available framework for defining important biodiversity areas, although they are subject to geographical and taxonomic biases.
• To address the 'blind spots' of KBAs, specifically in marine environments, the proposed definition includes Ecologically or Biologically Significant Areas (EBSAs), Important Marine Mammals Areas (IMMAs), and Important Shark and Ray Areas (ISRAs).
• Certain ecosystems are included based on their role in the biodiversity-climate nexus, specifically those with high carbon sequestration value, such as Peatlands, Primary Tropical Forests, Mangroves, and Seagrass beds.
• The note suggests that FIs establish buffer zones around critical areas to prevent fossil fuel activity, recommending 10 km for terrestrial areas and 50 km for marine areas due to the larger impact radius at sea.
• The document asserts that official protection status does not ensure effective conservation, noting that over 80% of European Marine Protected Areas only marginally regulate human activities.
• Several frameworks were excluded from the primary definition because they lack regularly updated geographical layers for project screening or do not relate directly to biodiversity preservation, such as "Nature’s Contribution to the People" (NCP).

APA

Reclaim Finance (2026). Defining “Critical Biodiversity Areas”. https://reclaimfinance.org/site/wp-content/uploads/2026/04/Policy-Note_Defining-Critical-Biodiversity-Areas_v042026-1.pdf

Chicago

Reclaim Finance. Defining “Critical Biodiversity Areas”. 2026. https://reclaimfinance.org/site/wp-content/uploads/2026/04/Policy-Note_Defining-Critical-Biodiversity-Areas_v042026-1.pdf.

Wikipedia

{{cite report |author=Reclaim Finance |title=Defining “Critical Biodiversity Areas” |date=April 2026 |url=https://reclaimfinance.org/site/wp-content/uploads/2026/04/Policy-Note_Defining-Critical-Biodiversity-Areas_v042026-1.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{reclaimfinance2026defining, author = {{Reclaim Finance}}, title = {{Defining “Critical Biodiversity Areas”}}, institution = {Reclaim Finance}, year = {2026}, month = apr, url = {https://reclaimfinance.org/site/wp-content/uploads/2026/04/Policy-Note_Defining-Critical-Biodiversity-Areas_v042026-1.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }