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Urban nature-based solutions (NBS) are increasingly deployed to restore ecosystems, regulate microclimates, support biodiversity, and enhance wellbeing. Yet many remain short-lived: once installation and early monitoring end, maintenance budgets shrink, responsibilities become unclear, and socio–ecological performance declines. The EU BiodivNBS NatureScape project addresses this overlooked post-implementation phase by examining how NBS are cared for, governed, and experienced over time in seven European cities – Oslo, Dublin, Riga, Milan, Lisbon, Lublin, and St. Gallen.To strengthen long-term sustainability, NatureScape establishes Transformation Labs (T-Labs) at demonstration sites, including rain gardens in Lublin; community gardens in Oslo, Riga, Milan, and St. Gallen; school gardens in Lisbon; and goat-grazing vegetation management in Dublin. These T-Labs function as practice-based innovation spaces where municipal authorities, researchers, and community groups jointly observe socio–ecological dynamics, identify stewardship challenges, and co-develop adaptive responses. The approach extends conventional living labs by focusing on long-term socio–ecological change and governance arrangements that support NBS persistence.NatureScape integrates baseline assessments across five forms of capital (natural, social, human, manufactured, financial) with participatory workshops, PPGIS, citizen science, and systems tools such as causal loop diagrams and multi-criteria assessments. This mixed-methods design enables analysis of NBS as dynamic systems shaped by interactions between ecological conditions, institutions, and community practices.Early findings from Oslo, Riga, Lublin and St. Gallen reveal recurrent barriers: unclear responsibilities after project funding ends, limited resources for routine care and climate adaptation, insecure land tenure, weak alignment with municipal strategies, and uneven community participation. In St. Gallen, expectations to expand activities, actors, or spatial scope further increase complexity and demand stronger management capacities.This study presents the NatureScape framework for post-implementation NBS governance and demonstrates how T-Labs can: (i) shift perceptions of NBS from temporary projects to living infrastructures requiring continuous care; (ii) clarify and redistribute responsibilities and resources for long-term stewardship; and (iii) provide structured settings where new forms of cooperation and valuation can be tested and embedded in policy. Embedding co-maintenance and co-stewardship as core practices can help cities move beyond pilot projects toward durable, multifunctional NBS aligned with EU and global biodiversity frameworks and targets.
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This study presents insights from the EU Biodiversa+ NatureScape project (2025–2028). The project offers a new perspective for understanding nature-based solutions (NBS) in cities by focusing on the post-implementation phase, in which environmental justice in urban planning is put to the test.In recent years, cities have increasingly pursued NBS in urban development projects such as community gardens, green roofs, and temporary green spaces to support biodiversity while simultaneously improving human well-being. Despite growing recognition of NBS in urban planning, their potential for cities' socio-ecological transformation remains constrained by overlooked post-implementation challenges. While the planning and implementation of NBS already receive considerable attention, critical dimensions of environmental justice – distributive equity, accessibility, and procedural justice for continuous public participation and stakeholder engagement – become apparent only in the post-implementation phase. This phase is characterized by dynamic interactions between social and ecological components, shaping whether NBS are consolidated and sustained in ways that contribute in the long term to transformative effects and environmental justice, or whether they instead undermine these aims.NatureScape addresses this critical transition and its challenges in urban planning. Through transformation laboratories (T-Labs) in seven cities (Oslo, Dublin, Riga, Milan, Lisbon, Lublin, and St. Gallen), the research team explores two central questions: (1) What enablers and barriers in urban planning shape the post-implementation stewardship of urban NBS? (2) What governance mechanisms, strategies, and measures lead to the successful integration of urban NBS into urban planning to unfold their transformative potential for biodiversity-positive transitions and environmental justice?Initial findings from the T-Labs reveal crucial barriers. The post-implementation phase is often reduced to technical maintenance. Insufficient incorporation of NBS into urban planning is associated with fragmented institutions and responsibilities, weak strategic and instrumental anchoring, financial insecurity, and the erosion of institutional and political support.The project identifies interconnected governance mechanisms that could successfully integrate NBS into urban planning: adaptive planning processes, institutional anchoring that fosters shared ownership among stakeholders, co-management approaches with formal agreements, public planning frameworks, and institutional structures that support integrated action. Together, these mechanisms highlight stewardship as a pivotal principle for achieving just and biodiversity-positive urban futures.
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