Oral Presentation Society for Freshwater Science 2026 Annual Meeting

Implementing freshwater restoration under real-world constraints: European lessons for building resilient watersheds (135872)

Yaron Hershkovitz 1 2 , Sebastian Birk 1
  1. Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
  2. Steinhardt Museum of Natural History , Tel Aviv University, Tel -Aviv, Israel

Building resilient watersheds and communities requires not only ambitious restoration goals, but also a clear understanding of how restoration measures are implemented in practice under real-world constraints. This presentation contributes to the transatlantic dialogue on freshwater restoration by synthesising European experiences from the EU-funded MERLIN project, with a focus on implementation processes rather than ecological outcomes alone.

Across diverse river, wetland, and floodplain restoration case studies, MERLIN examined how planning and implementation unfold within complex governance settings shaped by permitting regimes, land ownership patterns, stakeholder interests, funding rules, and technical uncertainty. Drawing on qualitative case narratives and practitioner reflections, the synthesis highlights how restoration delivery is rarely linear: measures are frequently adapted, redesigned, or sequenced differently than originally planned in response to social, institutional, and ecological constraints. Importantly, such adaptations often reflect learning and responsiveness rather than implementation failure.

The analysis identifies recurring implementation patterns, including the importance of early institutional alignment, sustained stakeholder engagement, and the need for long pre- and post-project phases to support durable outcomes. These insights resonate strongly with North American watershed restoration experiences, where adaptive management and community engagement are likewise central to success. By foregrounding implementation as a negotiated and adaptive process, this contribution offers transferable lessons for designing restoration programmes that are robust to complexity and capable of strengthening both ecological and social resilience across freshwater landscapes.