WWF G200 Terrestrial

Source: WWF Global 200 Year: 2002 Category: Transition risks · Sensitive areas · Critical areas · WWF G200 Coverage: Global Format: Boundary polygons Used in risk analysis: No (contextual layer; not used in materiality scoring)

What it shows

This layer delineates the terrestrial ecoregions identified by WWF's Global 200 project as outstanding examples of the world's land biodiversity. These are priority landscapes whose habitats and species are considered essential to conserve a representative sample of life on Earth. A site that falls within or close to one of these areas sits in a recognised conservation priority, which can raise reputational and regulatory sensitivity for operations and supply chains.

How it is built

The Global 200 was developed by WWF as a science-based ranking of the planet's most biologically distinctive ecoregions, grouped into terrestrial, freshwater and marine sets. The terrestrial set captures the ecoregions selected for their species richness, endemism, distinct evolutionary or ecological phenomena, and rarity of habitat type. This layer presents those terrestrial priority ecoregions as fixed boundary polygons; it is a designation map rather than a graded risk surface.

How to read it

This is a presence layer. A site that intersects or lies near one of the Global 200 terrestrial polygons is flagged as falling within a globally significant conservation priority. There is no 1–5 score; the relevant signal is simply whether a location coincides with a designated ecoregion.

Class thresholds

This layer does not model a continuous physical quantity, so it has no numeric class thresholds. It is a categorical presence / boundary layer: each polygon is one of WWF's Global 200 terrestrial priority ecoregions. The symbolised field (G200_BIOME) is not a measured value but a biome category code from 1 to 14 — 1. Tropical and Subtropical Moist Broadleaf Forests, … through 14. Mangroves — used only to colour each ecoregion by its biome type. The fourteen values are habitat-type labels, not ordered risk classes.

The relevant signal is binary: inside a Global 200 ecoregion versus outside. In Darwin's configuration this layer carries no proximity rule (proximities = []), so it is a contextual designation map and is not used in materiality scoring; conceptually it is triggered by overlap with an ecoregion polygon rather than by any numeric value.

How these thresholds were set. There are no thresholds to set — the biome codes and ecoregion boundaries are taken directly from WWF's Global 200 dataset (Olson 2012). The 1–14 categories are WWF's biome typology, not a Darwin or other in-house classification.

Reference: WWF Global 200 — worldwildlife.org/publications/global-200.

Source

WWF Global 200 (terrestrial priority ecoregions). See WWF's Global 200 publication.

Comparison with the WWF Risk Filter Suite

This layer maps to BRF indicator S14_4 Other Important Delineated Areas (Global 200 ecoregions, Olson 2012). It is drawn from the same source family that WWF itself uses, so the alignment is direct.

Legend

Symbolised field: G200 Biome

Generated from darwin/layers/layer-wwf-g200-terrestrial.toml and risk_indicator_pairs.toml (develop).