Ports and marinas are increasingly recognized as strategic actors in Europe’s green transition, yet biodiversity remains marginal in most port environmental governance frameworks, often overshadowed by carbon and pollution metrics. Despite their extensive geographic coverage and direct interface with sensitive coastal ecosystems, ports also remain underutilized as platforms for standardized biodiversity monitoring and stewardship. This paper argues that integrating environmental DNA (eDNA) - based ecological indicators into existing port certification schemes offers a scalable, suitable pathway for ports in operation and scientifically robust pathway to reposition European ports as active contributors to biodiversity conservation. We further embed eDNA-based monitoring in the DAPSIR (Drivers, Activities, Pressures, State, Impact, Responses) framework to link port operations to ecological outcomes and management responses. By addressing standardization, actionability and governance integration, this paper outlines how biodiversity certification can evolve from procedural compliance toward evidence-based ecological stewardship, enabling ports to become long-term observatories and active agents of biodiversity recovery across Europe.
Madon et al. (Fri,) studied this question.