The focus on marine spatial planning (MSP) has gained much traction in international and regional discourse related to ocean and blue economy (BE) governance in recent decades [1]–[3]. A simple Science Direct electronic database search revealed that since 1999, additional research has focused on MSP (Fig. 1), thus reinforcing its importance in ocean spaces that are increasingly associated with increased human and ecological stressors, e.g., climate change and biodiversity loss/degradation [4]–[7]. Unfortunately, despite the prominence of the term in international and regional fora and programs [8]–[10], e.g., in the European Union (EU) region, e.g., in Estonia [11], MSP as a concept is poorly defined and largely under implemented in many maritime jurisdictions even within the EU region [11]–[13], as the focus has been on marine protected areas (MPAs) [14], e.g., in Indonesia [15] and Senegal [16]. In worst-case scenarios, few studies clearly show how, when, and which actors need to be involved in the MSP process to ensure sustainable outcomes related to marine space use and governance [17]–[19]. This approach might risk throwing MSP in limbo and render MSP a top-down political tool rather than a sustainable strategy for attaining practical ocean governance and management targets related to marine ecosystem health, social equity, and inclusive economic development [20]–[22]. Given the increasing urgency of addressing marine space ecosystem shocks evidenced by a decline in marine resources and ocean health [23] and the increased proliferation of anthropogenic activities in marine space, e.g., in the Baltic Sea Region [24], translating high-level conceptualizations of MSP and crucial implementing actors to enhance the practical implementation and sustainable operation of MSP for sustainable marine futures need to be prioritized.
This paper is concerned with the development of practical insights and pathways for ensuring the viability of stakeholder engagement in MSPs. Our main focus is to document which stakeholders are needed, when and where and how such stakeholders could guide MSP actions based on its implementation and operationalization. We further document how such stakeholder engagement could have positive ramifications for ocean governance and the focus on the BE. In other words, this study provides a detailed explanation of how stakeholders’ holistic participation in MSP processes could contribute to the success of MSP processes, especially in marine and coastal jurisdictions lacking MSP and Integrated Coastal Zone Management (ICZM) practices. In our view, we argue that the inclusion of all stakeholders could enhance the adoption and operationalization of MSP even in complex marine zones, as reported in several studies, e.g., in the Baltic Sea region [24]. What is lacking in most of the related literature is clear documentation and research on how several stakeholders and overarching ocean activities could be involved and integrated, respectively, to operationalize the MSP. We build on this proposition by exploring the literature on different MSP case studies and conducting a key informant interaction with an expert in MSP from South Korea to develop coherent insights into how coastal states could learn from Korean experiences, e.g., related to including stakeholders in the MSP process to enhance sustainability in the marine space. We begin by defining MSP based on different perspectives, theoretical origins, needs for MSP, and persistent gaps in MSP implementation, especially with a focus on stakeholder engagement. From this, we provide insights into the benefit of stakeholder engagement in the MSP process.
1.1. What is MSP?
A review of related studies reveals different perspectives on the meaning of MSP, and this depends on the jurisdiction and foci of a given country in relation to its marine space use [4]. The discrepancy in the meaning and definition of MSP also depends on the spatial scope, i.e., global, regional, national, and maritime targets of a given area in relation to the different users [25]; e.g., in the Mediterranean, MSP was initially aligned with MPA planning [26], with the aim of creating a foundation for sustainable and integrated coastal zone management (ICZM) practices, e.g., in Sweden [2]. In some countries, different terms have been used synonymously to refer to MSP, e.g., marine planning [27]; integrated ocean management, e.g., in Australia [25]; and marine or ocean zoning and management [28]. Most of the definitions have succinctly described MSP as either a tool or process focused on coastal and marine space ecosystem-based management, e.g., in the EU region and Australia, focusing on, inter alia, particularly, sensitive sea areas (PSSAs), vulnerable marine ecosystems (VMEs), emission control/special areas, and areas of particular environmental interest (APEIs) [27]–[29]. This perspective defines MSP as a regulatory mechanism or framework for ocean activities via different approaches, e.g., ocean zoning [30], as described in the Area Beyond National Jurisdiction (ABNJ) [27]. Although not all scholars agree with this definition, it provides insight into MSP. Other robust and more comprehensive definitions have thus evolved to define MSP. According to Zuercher et al [8], MSP is globally envisioned as an ocean-based management approach that denotes a paradigm shift toward a zonal-based, integrative policy focused on public processes that involve all stakeholders in the assessment, monitoring, and distribution of anthropogenic uses across the ocean environment. Thus, to provide a better understanding of ecosystem functioning and, eventually, for appropriate management and marine conservation strategies, MSP focuses on the efficient monitoring of spatiotemporal patterns and usage in ocean ecosystems [9]. This partly relates to the Australian model where MSP is envisioned as a part of Integrated Ocean Management (IM) [25] focused on developing sustainable BE initiatives, e.g., in Seychelles [1], and incorporates new ideas that shape new sustainable attitudes and system thinking synergies that value all users and open up new windows of opportunity for ocean policy change [5].
In the EU, MSP is viewed as a political tool [31], [32] focusing on, among other topics, the holistic involvement of all users in the development of the ICZM principles, e.g., around the Mediterranean Sea area [7]. These include the responsible growth of Europe's coastal areas and marine space in the interest of environmental health and marine restoration [31] and the embrace of nature-based solutions (NBSs), which promote marine ecosystem resilience by connecting all coastal activities, resources, and all users [33] to enhance ocean monitoring environments for adequate management and marine conservation policies [9]. This perspective, however, varies depending on the EU member state. In Spain, MSP is viewed as a collaborative tool for marine ecosystem protection and conservation, e.g., around the Sierra Helada Marine Natural Park, against destructive and competing human activities [34]. In the Baltic Sea zone, MSP is viewed as a public and political process [4] for achieving sustainability objectives and analyzing and allocating the spatial and temporal distributions of human activities in marine areas [3]. In Sweden, MSP forms a part of the Integrated Coastal Zone Management (ICZM) ecosystem, which focuses on the governance of complex human-ecological systems and the multiple interests of actors across different scales [2].
Most of these definitions, albeit with a few discrepancies, clearly show that the main focus of MSP is collaborative management and the use of marine space to achieve a win‒win scenario for marine resources and users. According to Nathaniel et al [2], MSP is a new instrument for ocean governance that aims to safeguard regions that support different health advantages while prioritizing health equity. MSP links sustainability considerations that are aligned with political processes, and this is accomplished through a rigorous public process that involves understanding and allocating the spatial and temporal distributions of human activities in marine areas [3]. MSPs use a variety of planning techniques, such as integrated coastal and ocean management (ICOM), as documented in Canada [10], to meet these goals. The ICOM focuses on identifying and ranking key locations in the marine environment that are significant for species, ecosystems, or human activities [35]. This suggests that MSP is a new marine space paradigm shift that draws on sustainability paradigms, such as those of the Convention on Biological Diversity (CBD) criteria for marine biodiversity/ecosystem identification [10]; protection of vulnerable people's cultural legacies, such as in the EEZ [35]; and alignment of marine space users and uses to achieve politically mandated ecological, economic, and social objectives [11].
1.2. Theoretical origins of MSPs
A simple online review of MSP-related documents reveals that specific literature on MSP is relatively new (Fig. 1) and has proliferated over the last two decades [3], [28]. Although there is traditional evidence of MSP, as reported in historical maps and Atlases, e.g., the Piscatorial Atlas of the North Sea in 1883, in most coastal jurisdictions, there was a focus on specific marine sectors; activities, e.g., fishing catch and boats [28]; area resource management, e.g., on MPAs [36]; and migratory marine fishes/species with less focus on other competing users or activities [37], [38], which increased the risk of unsustainable resource utilization and degradation of the marine space, including the cultural heritage of vulnerable coastal communities and states [12], especially in coastal near-shore zones [6]. A number of studies document that this marine space complexity was critically recognized through the 1960s and conceptualized in the 1980s after the United Nations Convention on the Law of the Sea (UNCLOS), which recognized the integration between the different maritime challenges and complexities that required integrated planning, zoning, and development of collaborative legislation on ocean space use and management even though the 1982 UNCLOS did not clearly specify how such activities could be planned [28], [35]. On a national level, early attempts at MSP were reported in the USA after the promulgation of the 1972 Coastal Zone Management Act and in the 1980s in Australia, where the authorities aimed at protecting and zoning marine resources and human activities around the Great Barrier Reef [28], [39]. In fact, Australia set an example as the second country after Canada’s Oceans Act, 1996 [28], to develop a holistic ocean policy (AOP1999) [25]. Subsequent regional conferences, e.g., the 4th Conference of the Baltic Sea Ministers for Spatial Planning and Development in 1996, further birthed strategies for spatial planning of the coastal zone in the Baltic Sea region [2], [28].
Today, the focus on developing comprehensive MSP is still at either the regional or national level, e.g., in the EU [11], and in other regions, e.g., Sweden [2]. In the EU, the increased focus was birthed after the EU Marine Spatial Planning Directive (MSPD) [40] coded 2014/89/EU [11], [31], which came into law in 2014 [4], [5]; among other factors, all European coastal states, e.g., in the Baltic Sea region [2], needed to sustainably and systematically develop MSP in the EU Member States and establish maritime spatial plans by Member States at least by early 2021 [11]. Member states should plan their resource use in their European ocean zones holistically, with an emphasis on using an ecosystem-based approach [4], [11]. Research has shown that this directive has played a significant role in assisting the majority of EU nations, including Sweden and Italy, in creating baseline procedures for MSPs [31].
Outside the EU region, other countries, e.g., in the Mediterranean region, are also trying to develop MSPs [6], e.g., around Algeria, with a focus on ICZM principles [7]. In Spain, an increased focus on MSP was initiated approximately 2005 around Marine Natural Parks [34]. In Portugal, MSP efforts gained more momentum approximately 2008, focusing on designing and implementing plans that not only coincide with MPAs but also biodiversity hotspots where several human activities, e.g., tourism and fisheries, interact/exist [32]. In South America, MSP efforts have been made, especially in fishery zones, e.g., of Rio Formoso in Brazil [41]. In China, e.g., around Hainan, interest in MSP has increased with increasing focus on citizen science, which promotes public participation in scientific research and monitoring in marine space [42]. In Micronesia, MSP efforts have become more robust since 2017 with the institutionalization of the UN Preparatory Committee (PrepCom) to draft a new biodiversity framework and propose an International Legally Binding Instrument (ILBI) under the UNCLOS to guide MSP [27]. In Canada, MSP is envisioned as ‘Canada’s Ocean City’, with a focus on the Convention on Biological Diversity (CBD) COP-15 and the draft Kunming-Montreal Global Biodiversity Framework, which stipulates targets for increasing equity and shared benefits in green and blue spaces [10] to reinforce area-based ocean protection targets [12].
Currently, there is growing evidence that the majority of coastal states are implementing MSPs. For example, by 2019, 22 countries had operational MSPs, and 44 countries were in the process of developing MSPs [8]. By 2030, at least one-third of the global Exclusive Economic Zone (EEZ) is predicted to have government-approved MSPs [11]. Studies have also reported that MSP is expanding rapidly from the national waters of coastal states to ABNJ with support from prominent organizations such as the United Nations to meet Sustainable Development Goals (SDGs) [8], [28]. In addition, several private actors and companies, e.g., those around France’s Mediterranean coast, are increasingly devoting effort, e.g., as solution providers and remote design office providers, to attaining MSP targets, e.g., for ecological restoration [6]. This shows positive advances in attaining global targets related to marine space use, implying that more knowledge on the benefits of MSP could be key in helping other coastal states and maritime regions increasingly focus on MSP [40].
1.3. Why MSP?
In most of the global literature related to marine governance, it is clearly recommended that MSP is key to unlocking the sustainability challenges related to marine resource management, especially the complex interests of users at different scales [28], [43]–[45]. This is because MSP has the potential to balance the competing interests of marine resource users while ensuring biodiversity management [11], [44]. In other words, MSP is core to the attainment of sustainability goals related to social equity, e.g., via the preservation of vulnerable cultural resources, especially for indigenous peoples, e.g., in Tasmania [10], [43] and citizens science [42] or citizen engagement [46]; biodiversity conservation and management, e.g., for migratory species in the ABNJ [25]; participatory fisheries governance, e.g., of octopus in Indonesia [47], [48]; and harnessing of the economic potential of the BE, e.g., related to inclusivity in marine resource harvesting and access among indigenous communities via the development of robust inclusion initiatives, e.g., the Indigenous peoples-centered Social License to Operate (SLO) approach in Australia and Canada, which aligns with indigenous values, ancestral rights, and interests [48], [49]. A study by Axon and Collier [29] clearly underscores the need for MSP by arguing that the tool ensures that marine resources and activities are managed equitably, transparently, and participatory, taking into consideration all stakeholders’ perspectives and needs, including coastal peoples, indigenous groups, and other relevant sectors. Such a participatory approach enhances the development of new and just BE transitions that could be key in developing futuristic global policy frameworks for the use of marine resources among various actors/sectors, e.g., fishing; shipping, e.g., in the Northern Low-impact Shipping Corridors initiative, e.g., in the North Arctic Zone of Canada [19]; and energy production and ensuring that conservation objectives are integrated into decision-making [24], [50].
In other words, MSP is envisioned as a benchmark for the development of the ecosystem-based approach (EBA) in marine space related to, e.g., green and blue infrastructure projects via the effective use of different stages of the MSP process, e.g., the scoping, developing, assessment, implementation, and follow-up stages, in marine space zoning, e.g., within the Baltic Sea zone [24]. The use of EBA could be key to marine conservation efforts, especially in areas with MPAs, since it enables the development and use of the 'Paper Park Indices' to identify potential 'paper parks' or ineffective MPAs [51], the evaluation of regional and global coral bleaching risks [15] and the mapping of critical benthic habitats, e.g., in the Canary Islands [20]. This perspective clearly yields results, e.g., in Taiwan, multipurpose marine protected areas (MPAs) that integrate underwater cultural heritage (UCH) and ecological heritage have been developed as sustainable marine resource management approaches [12], [23]; in Senegal, traditional knowledge and practices have been integrated into formal marine management structures [16]. This could further act as an economic avenue via the promotion of conservation finance initiatives, e.g., through tourism user fees, to aid in enhancing MPA management and outcomes [52]. This implies that MSP is key to addressing the challenges and conflicts in the designation of underwater cultural heritage protected areas and sustainability in the use of marine resources ([10], [11].
This could further help in building the social capital of different stakeholders and initiating robust political discussions that entail horizontal and vertical discussions across different hierarchies of power that shape stakeholders’ inclusivity in public participation [21]. This implies that the benefits of MSP are not only localized but also scaled up to areas beyond coastal states’ jurisdictions, which could be key in promoting global marine governance [20], [48]. In addition, several studies have reported that MSP processes can potentially enhance the spatial allocation of large societal benefits across ocean activities that may be at risk [20], [23], which ensures the long-term maintenance of ecosystem service (ES) supplies and offers a starting point for assessing current trade-offs between various ecological, social, and economic goals while gauging their level of achievement [2], [20], [42].
To clearly understand the need for MSP, it is crucial to show the sustainability benefits that EU countries have gained since the development of the Marine Strategy Framework Directive (MSFD) [22]. In countries such as Greece and Croatia, the MSFD helped in aligning and coordinating actors and marine users with national key policies that were previously hard to achieve [2], [22]. This was accomplished by streamlining the MSFD with the Maritime Spatial Planning Directive (MSPD) [11] and developing policies governing ocean activities spatially and planning [20] to ensure that ocean activities do not create pressure on the ocean environment. The MSP was created in the EU as a strategy for sustainable marine development and as a multidisciplinary and collaborative process that guides decision-making. It addresses anthropogenic-environmental resource use complexities and issues pertaining to marine conservation and economic growth in relation to holistic ocean and coastal management (OCMA) and creative solutions for ocean sustainability [13], [18], [53], [54]. In brief, MSP is essential for long-term ocean-based transformational changes that are driven, inclusive, structural, and systemic [13], [22], [55] because it addresses a variety of socioenvironmental injustices ingrained in current ocean practices, such as the nonrecognition of certain identities, rights, and knowledge and value systems through participatory processes [3], [56], [57].
Therefore, MSP is desperately needed in most jurisdictions where it reduces socioeconomic costs and aids in the development of strong policies that have a clear focus on minimizing trade-offs between the objectives of biodiversity conservation and the financial interests of stakeholders [58], [59]. Agnostini et al, [59] state that when different sectors use shared data, information, and visualization tools such as maps, geospatial information systems (GIS), and tools, e.g., Marxan, in MSP processes, there are increased opportunities for agreement among stakeholders using MSP tools and procedures. According to the Australian Government [60], this approach helps managers grasp the complexity of the ecosystem and facilitates decision-making. In addition, gathering data from various maritime locations and incorporating them into geographic maps advances our understanding of ocean systems, which are catalysts for sustainable ocean management and resource use [61], thus enhancing sustainable blue spaces [10].
1.4. Persistent challenges and gaps in the adoption of MSP
In the previous section, we elaborated on the benefits of MSP in relation to marine sustainability targets across all jurisdictions, e.g., in the EU [13], [55]; in North America, e.g., Canada [10]; and in Australia [25], Africa and Asia [16], [42], [62]. Unfortunately, a critical review of related studies, especially related to the progress and implementation of MSP, reveals that much need to be done [2]. For instance, in the EU, only approximately 22 countries have fully enforced the EU directive on MSP, and in some small European states, complexities are still prevalent, e.g., on how to ensure the collaborative participation of different actors [2], [11], [22]. In marine biodiversity hotspots, e.g., in Micronesia, only 1.18% of ABNJ are under protection, and key stakeholders who are essential for guaranteeing legitimacy in the governance process among local users are lacking [27]. In some coastal states, studies have reported challenges related to the development of sustainable targets and outcomes, e.g., where there are many users [25], [28]. This has led to the proliferation of tradeoffs, e.g., between SDG 14 and other marine sectors, as well as an increase in social injustices in the use of ocean resources, e.g., in small island developing states (SIDS), e.g., Seychelles [1], [63] and Ocean Decade targets [64]. In coastal states dependent on service sectors, e.g., marine tourism, there has been an increase in pollution from marine activities, e.g., transport, urbanization, and mining [2]. This shows that even though MSP is highly recommended, there are gaps, e.g., related to implementation, since most countries’ ocean activities are managed at the per-sector level, with less focus on nesting all the system actors and sectors [25].
In most of the reviewed studies, we found that the persistent challenge reported related to MSP development and implementation has been related to a lack of awareness of participatory inclusion or stakeholder interest in kick-starting or sustaining MSPs owing to the different interests and influences of various marine users, irrespective of the spatial-temporal scale [1], [2], [22], [27]. For example, MSP mechanisms for organizing and conducting stakeholder selection and choosing inclusion guidelines are still absent in the Baltic region [4]. However, as studies conducted in Australia have shown, to achieve sustainable MSP outcomes, such participatory decisions need to address crucial concerns about why, who, how, and when to include people [25], [28]. The MSP has faced criticism in certain jurisdictions for its practical tendency to “secure democratic legitimacy for undemocratic goals” created by influential or favored actors rather than involving stakeholders in actual decision-making processes and for giving preference to new-liberal economic goals because of institutional inertia [5], [65].
Additionally, most MSPs target economic benefits, e.g., growing economic activity, and neglect the concerns of indigenous consumers by focusing primarily on offshore energy as a common actor [10]. This results in poor integration and results that are slow to improve critical reflection on institutional barriers to inclusion [31], lack of knowledge and guidance [28], [63], lack of data [25], and the use of scientific knowledge in environmental decision-making [5]. There are deficiencies in inclusive guidelines or accumulated practices for the assessment of MSP programmes and tools, even within the European Union [2], [26]. Key concerns in developing MSPs, such as deficiencies in governance frameworks, stakeholder engagement, coordination, and shifting to global environmental change, require improvements through an ongoing process of monitoring, evaluation, and revision [11], [34]. This may help to explain why, according to Argente García et al [34], 72% of the 1062 MPAs in the Mediterranean Sea zones, such as those around Spain, lack complete spatial plans. As a result, biodiversity may suffer as a result of an increase in anthropogenic uses and actors [11].
Another significant gap is the paucity of studies reporting on the process of developing a common vision among stakeholders in the MSP process in the literature [32]. This gap suggests that even when MSP processes are well designed and executed [66], [67], unfair and unequal conditions are likely to reduce the effectiveness of participatory processes [28]. Furthermore, current participatory projects may not always ensure that all knowledge holders are “empowered,” and they may even serve as a platform for one knowledge holder to abuse authority and control others [3], [68], [69]. This implies that even though studies related to MSP have subjectively reported on the need for stakeholder engagement, e.g., in the EU region [31], there is still evidence of marine space competition and ocean space grabbing by different actors [41], which leads to a continuation of top-down governance [70], less incorporation of local actors and their knowledge [71], [72] and bleak success of MSP in the future, as vulnerable people view it as a mere political tool with less focus on vulnerable people’s interests [2], [28]. With these gaps in mind, this study aims to provide a systematic perspective on the viability of stakeholder engagement in the MSP process by exploring which stakeholders are needed, when, how, and what could be the positive implications of stakeholder engagement in the MSP process for tapping into BE potential.