Rethinking the Ocean: New Science Charts a Transformative Path for Marine Planning

The world’s oceans are under pressure from every direction at once. Shipping lanes crisscross migrating whale routes, offshore wind farms rise above trawling grounds, and warming waters reshape entire ecosystems faster than governance systems can respond. Against this backdrop, a new collection of research published in Frontiers in Ocean Sustainability argues that the way humanity plans and governs marine space is due for a fundamental overhaul. The editorial, which introduces a Research Topic titled Navigating Change: Transformative Approaches in Ocean Planning, brings together seven studies that collectively map out what it would actually take to move ocean management from fragmented, sector-by-sector decision-making toward something more coherent, inclusive, and scientifically grounded. Crucially, the editors are candid about where the field stands: these contributions document the enabling conditions and early steps required for transformation, rather than evidence that transformation has already been achieved.

The scale of the challenge is enormous. Marine and coastal systems are increasingly shaped by multiple, interacting pressures arising from human activities and climate change, and these pressures do not respect administrative boundaries or departmental portfolios. Policy initiatives such as the European Green Deal, the Marine Strategy Framework Directive, and the Maritime Spatial Planning Directive have established ambitious goals for ecosystem-based management. Yet, as the editorial notes, their implementation often reveals persistent fragmentation across sectors, scales, and institutions. The seven contributions to the Research Topic suggest that transformative ocean planning depends on interconnected changes in three areas: how knowledge is generated and integrated, how policies and institutions are coordinated, and how stakeholders and diverse knowledge systems are involved in planning and decision-making. Each of these pillars, the editors argue, is necessary but insufficient on its own.

The first pillar concerns the analytical machinery that underpins ecosystem-based maritime spatial planning, often abbreviated as MSP. One of the most technically significant advances comes from work on cumulative effects assessment, a method used to estimate the combined impact of multiple human pressures on marine ecosystems. These assessments have long suffered from methodological limitations that made their outputs difficult to use in real-world decisions. The new research refines the way pressures from maritime activities are quantified and interpreted by incorporating magnitude-weighted relationships between activities and the pressures they generate. It also introduces an unsuitability metric based on ecosystem sensitivities, which helps planners identify areas where particular activities are least compatible with the local environment. Interestingly, these refinements do not fundamentally alter the overall spatial patterns that the assessments reveal, but they significantly improve the interpretability and practical applicability of the results, particularly when applied at finer spatial resolutions.

That last point carries real weight for practitioners. In geographically constrained areas, such as crowded coastal seas where every square kilometer may host competing demands, management decisions demand higher levels of accuracy than broad-brush regional analyses can provide. Aligning analytical precision with the spatial scale of the planning challenge is therefore not a technical nicety but a practical necessity. The lesson emerging from this line of work is that cumulative effects assessment is evolving from a somewhat abstract mapping exercise into a decision-support tool that can genuinely inform where activities should and should not occur. For a field that has struggled to translate ecological science into actionable planning guidance, that shift in usability may prove as important as any conceptual breakthrough.

Yet the editorial is emphatic that technical improvements alone are insufficient without a deeper integration of social and ecological dimensions. A second study tackles this gap by operationalizing social-ecological indicators, embedding them within the DAPSI(W)R(M) framework, a structured approach that links human activities to pressures, state changes, impacts, and responses in marine systems. By explicitly connecting ecosystem changes to human wellbeing, the research exposes just how limited existing indicators are in capturing these interconnections. Most current metrics track environmental conditions or economic outputs in isolation, leaving the feedback loops between nature and society largely invisible to planners. The study identifies pathways for developing compound, digitally ready indicators that could bridge this divide, and this is where the work connects to one of the most exciting technological developments in ocean science: Digital Twin initiatives.

Digital Twin Ocean projects, such as SEADITO referenced in the editorial, aim to build dynamic virtual replicas of marine systems fed by integrated data infrastructures. The promise is transformative: planners could simulate the consequences of different management choices before committing to them, testing scenarios for offshore energy development, fishing pressure, or conservation measures in silico rather than through costly trial and error in the real ocean. But a digital twin is only as good as the indicators and data that populate it. The push toward compound indicators that simultaneously reflect environmental conditions and societal outcomes is therefore a prerequisite for making these tools meaningful for governance. If the digital revolution in ocean science proceeds without social-ecological integration, it risks producing dazzling visualizations of a partial reality, blind to the human dimensions that ultimately determine whether policies succeed or fail.

The second pillar of transformation involves the stubborn gap between policy ambition and on-the-ground implementation. Empirical analyses from the French Mediterranean and the wider Mediterranean basin demonstrate that while European policy frameworks are relatively coherent at higher levels in their environmental objectives, this coherence often dissolves during implementation. Administrative complexity, fragmented governance structures, and limited institutional capacity erode well-intentioned directives as they cascade downward. Local authorities in both studies face overlapping mandates, resource constraints, and insufficient mechanisms for stakeholder engagement, all of which hinder effective policy delivery. Anyone who has followed the implementation history of European environmental legislation will recognize this pattern, but the Mediterranean cases also offer grounds for optimism. They document examples of innovation, including multi-actor governance platforms, specialized institutional arrangements, and territorially grounded restoration strategies that enhance coordination and collaboration among actors who previously operated in isolation.

Complementing these case studies, another contribution identifies archetypal patterns of barriers and enablers that recur across governance contexts, providing a broader structural diagnosis of policy incoherence. Fragmented governance roles, weak coordination across the land-sea interface, and insufficient integration across policy domains emerge as recurrent obstacles. On the enabling side, harmonized data systems, knowledge-sharing platforms, and inclusive stakeholder engagement are highlighted as key factors that allow governance systems to function. These findings reinforce the need for governance that is not only better aligned in design but also more adaptive and interconnected in practice, capable of responding to the complexity and dynamic nature of marine socio-ecological systems. The land-sea interface deserves particular attention, since many of the most damaging pressures on coastal waters originate in terrestrial activities, from agricultural runoff to coastal development, yet land-use planning and marine planning typically proceed through entirely separate institutional channels.

The alignment of maritime spatial planning with overarching sustainability agendas forms a third strand of the collection. Researchers developed an operational framework to assess the extent to which existing Maritime Spatial Plans contribute to the European Green Deal, and applied it across several EU countries. The results reveal both progress and remaining gaps. Climate change mitigation is widely reflected in current plans, largely through the expansion of offshore renewable energy, which has become the dominant driver of marine spatial reorganization in European waters. However, other Green Deal priorities, such as ecosystem restoration, the circular economy, and zero pollution, remain less consistently operationalized. This uneven integration highlights the need to move beyond declarative commitments toward concrete, measurable actions, supported by frameworks that enable systematic assessment, comparison, and iterative improvement of planning outcomes over time. Without such feedback mechanisms, plans risk becoming aspirational documents rather than instruments of change.

The third and perhaps most socially resonant pillar concerns who gets a say in ocean governance. A case study from the United States Virgin Islands demonstrates how community-based coral and mangrove restoration workshops can function as powerful sites for co-producing knowledge, integrating local ecological understanding, and fostering culturally responsive restoration strategies. Participants prioritized ecological function, local livelihoods, and intergenerational engagement, a value set that challenges conventional top-down models of decision-making and points toward more relational and community-driven forms of governance. The editorial draws a pointed conclusion from this work: participation is not merely a procedural requirement to be checked off, but a transformative component of effective and legitimate marine management. Taken together, the seven studies identify key enabling conditions and practical pathways for change, including stronger social-ecological knowledge integration, more coherent and implementable policies, greater coordination across sectors and scales, strengthened local capacity, and more inclusive and adaptive planning processes. For a planet whose blue half is changing faster than the institutions meant to steward it, these insights remain pivotal to the continued evolution of ecosystem-based and transformative ocean planning in Europe and beyond.

Subject of Research: Transformative approaches in marine governance and maritime spatial planning

Article Title: Editorial: Navigating change: Transformative approaches in ocean planning

Article References: Depellegrin, D., Li, S., & Kyriazi, Z. (2026). Editorial: Navigating change: Transformative approaches in ocean planning. Frontiers in Ocean Sustainability, 4, Article 1988794. https://doi.org/10.3389/focsu.2026.1988794

Image Credits: AI Generated

DOI: 10.3389/focsu.2026.1988794

Keywords: ocean governance, maritime spatial planning, cumulative effects assessment, Digital Twin Ocean, European Green Deal, policy coherence, social-ecological indicators, participatory approaches, Mediterranean Sea, ecosystem-based management, marine restoration, coastal management