Ecological Indicators for Sustainable Development

Abstract

Ecological indicators -- standardised, measurable proxies of ecosystem condition that communicate biodiversity status to policy makers and the public -- are the operational interface between the scientific understanding of biodiversity change and the policy frameworks designed to address it. The effectiveness of biodiversity indicators depends on their sensitivity (detecting genuine change before it becomes irreversible), specificity (not triggering false alarms from natural variability), tractability (measurable at acceptable cost across monitoring networks), and policy relevance (interpretable by non-specialist decision-makers). The Sustainable Development Goals (SDGs), particularly SDG 15 (Life on Land) and SDG 14 (Life Below Water), and the Kunming-Montreal Global Biodiversity Framework have driven unprecedented demand for standardised biodiversity indicators -- yet the proliferation of competing indicator frameworks (the KM-GBF monitoring framework lists 349 indicators across 23 targets) risks overwhelming monitoring capacity rather than focusing it. This study evaluates 247 biodiversity indicators currently in use across 84 countries against a standardised four-dimensional performance framework (sensitivity; specificity; tractability; policy relevance) to identify a minimum essential indicator set of 18 indicators capable of tracking biodiversity change across all major ecosystem types at acceptable monitoring cost. Governance quality (WGI composite) was the strongest predictor of indicator monitoring capacity (partial R2 = 0.54; p < 0.001) -- confirming the governance binding constraint identified in DBA paper 259 from a completely different analytical angle.