Ecosystem Integrity Index (EII)
The Ecosystem Integrity Index is a single, holistic measure of how healthy and intact terrestrial ecosystems are across the world.
Category: Transition risks · Sensitive areas · High integrity areas Coverage: Global Format: Raster grid (~300 m) Used in risk analysis: No (contextual layer; not used in materiality scoring)
What it shows
The Ecosystem Integrity Index is a single, holistic measure of how healthy and intact terrestrial ecosystems are across the world. It helps identify where ecosystems remain in good condition — and so are sensitive to disturbance — and where they are already degraded, which is central to assessing nature-related risk and dependency.
How it is built
The index is produced by The Landbanking Group (Leutner, 2025). It combines three dimensions of ecosystem health into one score: functional integrity (how productive the ecosystem is), structural integrity (the structure and connectivity of habitat) and compositional integrity (the make-up of the species present). These dimensions are integrated to give a continuous score from 0 (fully degraded) to 1 (fully intact), mapped globally on a fine grid of roughly 300 metres.
How to read it
Scores run from 0 to 1. Values close to 1 indicate intact, well-functioning ecosystems that warrant careful treatment; values close to 0 indicate heavily degraded ecosystems. A high score therefore flags a high-integrity, sensitive area near or at a site.
Source
The Landbanking Group — Ecosystem Integrity Index v1; Leutner, B. (2025). https://github.com/landler-io/ecosystem-integrity-index.
Comparison with the WWF Risk Filter Suite
This relates to WWF Biodiversity Risk Filter indicators S2_4 Ecosystem Condition (degraded) and S14_5 Ecosystem Condition (intact). WWF's ecosystem-condition indicator is a composite that pairs the EII with global functional connectivity, river fragmentation and a marine habitat measure. Darwin uses the EII on its own, so global functional connectivity, river fragmentation and marine habitat condition are not captured here.
Legend
Symbolised field: Integrity index
| Class | Colour |
|---|---|
| = 0% | #3d000f |
| ≤ 10% | #5c0217 |
| ≤ 20% | #a50026 |
| ≤ 30% | #d73027 |
| ≤ 40% | #f46d43 |
| ≤ 50% | #fdae61 |
| ≤ 60% | #fee08b |
| ≤ 70% | #d9ef8b |
| ≤ 80% | #a6d96a |
| ≤ 90% | #66bd63 |
| ≤ 95% | #1a9850 |
| ≤ 100% | #006837 |
Generated from darwin/layers/layer-ecosystem-integrity-index-eii.toml and risk_indicator_pairs.toml (develop).