Ecosystem-based management approaches applied to Mediterranean Marine Protected Areas (MPAs): a holistic strategy of governance, ecological assessments and conservation planning in order to inform sound management of marine resources

Ecosystem-based management aims to provide a mechanism for achieving a consensus among multi-sectorial activities for sustaining goods and services and achieving ecological, economic and social objectives in an area. The present study adopts innovative methods and approaches aiming to promote a holistic approach towards collaboration and effective conservation management in Mediterranean Marine Protected Areas (MPAs). In order to understand the current management needs in the Mediterranean MPAs, a management effectiveness evaluation was conducted in the Mediterranean scale following an existing guide (Tempesta and Otero, 2013). Information was collected through a synthesis and integration of different approaches during the period 2013-2014, and MPA management was evaluated on the basis of 21 indicators that described the general categories: (i) management and legislation; (ii) conservation features; (iii) pressures; (iv) communication and outreach. Case studies were initially assessed separately and were finally compared in order to identify common challenges and good practices in MPA management that may be put forward. Some of the most important problems were the inadequate annual funding; limited surveillance and law enforcement; the inadequate stakeholder engagement and bottom-up approaches; policy gaps and long bureaucratic processes to take action; inadequate monitoring of ecological and socio-economic parameters; limited understanding of human activity threats and impacts along with defining critical thresholds that may assure good environmental status of marine ecosystems. We highly recommend that the evaluation be a cyclic process conducted by a neutral practitioner that will inform management decisions and that results should be disseminated in order to reach a high status of MPA management performance in the Mediterranean. The evaluation of MPA management effectiveness guided the next steps of the study towards addressing realistic MPA needs and providing suggestions to improve MPA management. We focused at Portofino MPA case study (Ligurian Sea, Italy) - the third smallest MPA in Italy hosting rich marine biodiversity and a significant amount of human activities. One of the future targets of the MPA’s consortium is to expand its area in order to improve its capacity to effectively protect vulnerable habitats and the species it hosts. Taking into account the past experience and the inadequate communication and up-to-date information in the area, this initiative is expected to raise conflicts and opposition from users. Hence, Portofino MPA represents a case study of particular interest and relevance with MPAs facing similar issues. Following a holistic methodological approach, an engagement process was carefully designed to provide an insight into the social networks’ characteristics directly involved in supporting stakeholder engagement for sound governance performance and co-management of resources. Enhancing stakeholder engagement from the beginning of the process is essential in order to holistically inform decisions and increase the efficiency of conservation management. It is widely accepted that stakeholder engagement may promote cooperation and the exploration of possible solutions to common problems; facilitate the mitigation of conflicts due to various interests; and enhance coordination and the enforcement of common rules in a more transparent way. A framework to examine structural patterns in social networks and identify central actors with the capacity to serve as communication hubs is suggested to boost information flow and enhance stakeholder participation in decision-making. The approach consists of two powerful tools, Stakeholder Analysis and Social Network Analysis, that their capacity to provide an in-depth knowledge of the complexity of social-ecological systems and the factors that influence the engagement process in MPA management has been recently identified. Identification of stakeholders and their relations in a social network, where information exchange and interaction occurs, may highlight important channels for communication, or indicate key stakeholders with the power to control information flow and influence perceptions. This information may be leveraged to accelerate behaviour, facilitate bridging between organisations, promote deliberation, and improve the diffusion of information in MPA management. The outcomes of the study showed that the social network of the Portofino MPA exhibits a core-periphery structure where some user groups seem to have more privileges regarding access to information and resources in the area. The core of the network keeps the network together, and central stakeholders have the capacity to act as communication hubs and facilitate a two-way information flow that will foster communication, trust and collective learning in natural resource management. However, more effort should be made towards strengthening relationships between actors that may influence or be influenced by decisions relating to the MPA. The adoption of alternative communication strategies that integrate visualisation and user-friendly web platforms, in parallel to personal communication are suggested to involve more actively marginalized actors into decisions, that will increase the network’s cohesion, mitigate the power of central actors and augment plurality and new ideas in the engagement process. Production and synthesis of quantitative and qualitative information, related to conservation features and human activities, is another important aspect in conservation management that negotiation and decisions will be based on. Management of small scale and recreational fishing is one of the most important concerns and challenges that Marine Protected Areas (MPAs) have to encounter from a socio-economic, cultural and ecological point of view. Monitoring and assessing fishing activity requires complicated approaches due to the heterogeneity of methods that combine different gears depending on the target species, the season and the characteristics of the area. Many standardized strategies of fisheries management have tried and failed to capture this spatial and temporal heterogeneity, or to provide improved understanding of fishing impacts on the ecosystem components. The present study developed a framework for the monitoring and mapping of recreational and artisanal fishing activity. The framework considers and may be adjusted depending on the MPA management capacity in terms of budget and technology available, personnel available, the level of trust that characterizes the relationship between the MPA and the fishermen, and the willingness of all relevant actors and authorities to provide or collate respectively information. Data from different monitoring strategies and sources were integrated to archive a complete dataset that described different fishing practices in the area. Simple spatial indicators that describe fishing effort were used to map and describe the footprint of each fishing practice on vulnerable habitats, and identify the areas that receive greater fishing pressure. However this is the first step in order to assess the impacts of fishing pressure on vulnerable habitats. Pressure-impact assessments were conducted using spatial analysis in order to holistically inform management decisions on vulnerable habitats such as coralligenous under pressure in Portofino MPA. The approach considers the cumulative impacts caused by different fishing practices and incorporates uncertainty regarding available information following the precautionary principle. Cumulative impacts are based on a conceptual model that identifies the pathways through which activities cause harm and describing the likelihood and consequences of an event. The vulnerability assessment quantifies these causal-chain links between biophysical attributes and to human stressors that are described in the conceptual models. The vulnerability informs on the potential risk of loosing (or degrading) a particular habitat due to a specific pressure, and can provide further support to the assessment of the cumulative impacts caused by different fishing practices operating in an MPA. Coralligenous communities, in terms of coverage, are more abundant in zone B, while Posidonia oceanica meadows dominate in zone C of Portofino MPA. However, a great percentage of the habitat lies outside the MPA borders, which confirms the desire of the MPA management board to expand the area. The areas that receive the highest amount of fishing effort were located between depths of 30-40 m receive the highest fishing pressure at the majority of zone B. The vulnerability assessment revealed that artisanal nets, and both recreational and artisanal bottom longlines, had the highest potential impact on coralligenous habitat, independently from the duration that are active on the seafloor. Other recreational activities that were considered to have high potential impact for coralligenous due to the destructive characteristics of the practice and gear used, or due to the pressure’s high intensity and frequency, were vertical jigging, bottom trolling and big game with a rod and reel. The cumulative impact assessment provided an in depth understanding of combined exposure-effect approaches and identified additional areas in zone C and in greater depths, that fishing activity is necessary to be managed more strictly. Several suggestions were enlisted in order to mitigate fishing impacts on coralligenous habitats, for instance the establishment of additional spatial and temporal closures, prohibition of destructive fishing practices, etc. while policy gaps were also identified in the current management system. The approach takes into account the heterogeneity of techniques and captures the different scale of impacts on benthic habitats in a systematic, transparent and repeatable way, and provides a useful tool that integrates ecological, management and policy interventions. An emerging threat in coastal MPAs is the loss of fishing gears that drift away driven by currents and finally end up on the seafloor covering in some cases a significant amount of fragile benthic habitats like coralligenous. In Portofino MPA this is reported as a common issue and frequently divers retrieve the lost gears and monitor it. To inform the MPA regarding which areas are more susceptible to lost fishing gear, a semi-quantitative spatial analysis was conducted using information from the sea-bottom morphology (depth, slope, Benthic Position Index, rugosity, curvature). The areas identified overlap spatially with areas of high fishing effort, while the local currents agree that most susceptible areas are located in the southern part of Portofino MPA. Although data quality regarding information coming from divers was poor, the suggested analysis may provide useful information in order to focus management actions on specific areas. Finally, the Marxan with Zones conservation planning model was applied on Portofino MPA’s present zoning plan in order to provide alternative solutions for the enlargement and re-zoning of the MPA. Different scenarios concerning the regulation of human activities such as fishing and diving activities taking place at different zones were developed. In our management plan, we set high level conservation targets based on relative EU Directives, the high conservation status of the Portofino MPA (SPAMI) and management objectives. In the present study preliminary results are shown for a single scenario where a 4-zone plan is suggested to the expanded surface area of the MPA, where diving and fishing activity are re-arranged in space and strictly regulated. The suggested zoning plan provided by MARXAN with Zones ensures that high conservation objectives are reached in Portofino MPA with the lowest possible operational cost. Overall, the present study aimed to provide a complete ecosystem-based management approach that considers the social and ecological drivers of the system as complementary components for supporting future conservation initiatives towards collaborative management of resources. The management suggestions of this study provide transparent, comprehensive and efficient plans that can improve the governance and the management of marine resources in the area. Innovative tools and methods were integrated to inform several aspects in the management of marine resources in order to promote a holistic approach towards collaboration and deliberation in MPA management. The developed methodology offers guidance on how to structure and focus efforts for collecting, synthesizing and analyzing of necessary information to inform holistically policymaking and management processes. Results provide useful advise in mitigating the cumulative impacts of human activities and deliver alternative solutions that are based on strict systematic conservation planning principles. Moreover, the study may assist the Portofino MPA to build the social conditions and a future engagement strategy where stakeholders will welcome the conservation initiative for its expansion, however particular effort should be made by the MPA management board towards this direction.