Marine Protected Areas Research Articles

Marine spatial planning for socio‐ecological management of animal‐associated microbiomes

AbstractBiodiversity changes and habitat shifts are two phenomena substantially reshaping marine life on our present and future planet. Although those phenomena are well recognized on the macrobial level, they currently do not receive similar attention on the microbial level. Generally, microbiome diversity and function, associated with and governing the health and fitness of their host organisms, are neglected in conservation efforts. This is especially problematic as previous research has highlighted that host‐associated microbes (microbiomes) may display distribution patterns that are not only correlated with host animal biogeographies but also with other factors such as prevailing environmental conditions. Here, marine spatial planning for socio‐ecological management of animal‐associated microbiomes is discussed, using deep‐sea sponge and coral‐associated microbiomes as an example of how to incorporate microbial diversity into conservation planning. We advocate for a holistic and integrative approach to marine spatial planning that incorporates the larger habitat, the host, the microbiome, as well as the socio‐economic and cultural perspective, throughout the whole decision‐making process. A general workflow containing the needed steps to establish microbiome‐integrated marine protected areas is presented, as well as the analytical steps and results underlying the implementation of the world's first microbiome‐considered marine conservation network on the Scotian Shelf off eastern Canada.

A practical approach to meeting national obligations for sustainable trade under CITES.

Reconciling conservation goals with sustainable resource use requires adaptive management strategies. The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) regulates global trade for species listed on Appendix II, partly by requiring member countries (parties) to ensure exports do not damage wild populations (called making positive "nondetriment findings" [NDFs]). Unfortunately, when parties find NDFs difficult, they often suspend legal trade, imposing economic costs and driving trade underground. To make it easier for parties to examine the detrimental nature of exports, we devised a spatial approach and applied it to seahorses (Hippocampus spp.) in Tamil Nadu, India, as an example. Our approach involves mapping answers to 5 key questions on species distribution (QA), pressures (QB), management measures (QC), management implementation (QD), and species' population status (QE). We gathered data from fisher interviews and published literature. Seahorse abundance was greatest in southern Palk Bay and the northern Gulf of Mannar, primarily in seagrasses and coral reefs (QA). Fishing pressure was highest in Palk Bay, primarily from bottom trawlers and dragnetters operating in shallow seahorse habitats near the coastline (QB). Management measures including a marine protected area (MPA), bottom trawl exclusion zone, and closed season were theoretically in place (QC), but their implementation was poor (QD). Fishers reported seahorse catches in 85% of the area covered by the MPA and the exclusion zone; bottom trawlers were responsible for most violations. Seahorses were also captured in Sri Lankan waters, where bottom trawling is banned. Fisher reports indicated declining seahorse catches and reduced body sizes (QE), highlighting unsustainable exploitation. Our results highlight the need for better implementation of existing management measures before a positive NDF can be made and suggest mitigation beyond bans. Such pragmatic spatial analyses can help regulate exports at sustainable levels, supporting CITES implementation for its vast range of species.

From design to implementation: Lessons from planning the first marine protected area network in Canada

The social-ecological outcomes of marine protected areas (MPAs) can be amplified when sites are designed in networks that function cooperatively and synergistically. From 2015–2024, seventeen First Nations, the Province of British Columbia, and the Government of Canada collaboratively developed a Network Action Plan to establish an MPA Network for the Northern Shelf Bioregion (NSB). The NSB is a diverse and complex social-ecological region in British Columbia that spans an area of 102,000 km2 from Northern Vancouver Island to the Alaska border. Here, we describe the MPA Network planning process and the transition from Network planning to implementation. We discuss key elements of success that enabled the Network Action Plan’s collaborative development and lessons learned to inform and improve regional MPA Network implementation and global MPA Network planning and implementation. All phases of the planning process, including governance, development, engagement, design, and analysis, were guided by the following principles: collaborative governance, multiple ways of knowing, participatory engagement, and adaptation to new information. The Network Action Plan’s dynamic design process resulted in innovative approaches and tools to protect conservation objectives throughout the NSB. As the NSB MPA Network process transitions from planning toward implementation, collaborative governance, network monitoring, and ongoing participatory engagement processes will play a central role in advancing the goals and objectives articulated in the Network Action Plan and ensuring equitable social-ecological outcomes. Overall, the NSB MPA Network planning process provides a model for collaborative design of MPA Networks and can inform co-governance and co-management processes throughout the world.

Local size structure and distribution of demersal fish in relation to sea pens and other benthic habitats in a deep-sea soft-bottom environment

Many fish species undergo ontogenetic habitat shifts as they grow to fulfill new biological, ecological and environmental requirements. While relationships between fishes and large hard-substrate cold-water corals (CWC) (e.g., Desmophyllum pertusum reefs) have frequently been studied, there are relatively fewer studies examining the relationships of fish with habitats specifically provided by smaller corals (e.g., sea pens) in soft-bottom environments. Despite this knowledge gap around soft-bottom corals, growing evidence of their importance has nonetheless justified their inclusion as conservation targets in numerous Marine Protected Areas (MPA), including the Canadian Laurentian Channel MPA. Here, we performed ROV and near-seabed drift-camera system surveys within the Laurentian Channel MPA in 2017 and 2018 to assess the influence of fish body size and habitat type on fish small-scale distribution in a low-relief deep-sea soft-sediment environment. We compared the local size structure of the four most abundant deep-sea demersal fish taxa of the channel (Redfish (Sebastes spp.), Witch Flounder (Glyptocephalus cynoglossus), Marlin-Spike Grenadier (Nezumia bairdii) and Longfin Hake (Phycis chesteri)) across one barren and five structural benthic habitats defined by the presence of nine dominant epibenthic invertebrates (actiniarians and CWCs). We used generalized additive models to identify biotic (benthic habitats) and abiotic (depth, bottom types) covariates of size for each taxon. We observed 15,381 fish within the 43.6-ha study area, of which 7,511 fish were measured. Juveniles represented 99% of all fish measured, with a notable increase in average fish size in 2018. While we did not find any associations between benthic habitats and fish life stages, the analysis revealed a significant increase in fish size within sea pen habitats for all four taxa. Conversely, we found a taxon-specific influence of bottom type on fish size for all taxa. In addition, Redfish and Longfin Hake size was positively correlated with depth. For deep-sea demersal fish taxa of the MPA, our results suggest that 1) sea pens provide nursery habitat for early-life stages, 2) fish undergo ontogenetic shifts in micro-habitat use and specialization, and 3) fish-habitat associations appear to be facultative rather than obligate. Through the use of in-situ video data, this study provided evidence that small and large fish do not use the same micro-habitats, and that sea pens contribute significantly to fish habitat despite providing less habitat heterogeneity than reef-forming scleractinians or large gorgonians. These results contribute to empirical understanding of fish-habitat relationships at different fish life stages and may inform fisheries management, as well as monitoring efforts in the MPA and other protected deep-sea environments.

Innovative Geotechnical Solutions for Sustainable Infrastructure Development

Aim: To examine innovative geotechnical solutions for sustainable infrastructure development. Problem Statement: The advancement in the world urbanization together with high rise in global population has alarmed the need for new infrastructures with additional innovative research to be conducted with already existing assets. Thus, It is important that geotechnical engineering should include basic practices targeting resource-efficient and environment-friendly techniques in order to add to sustainable development. Significance of Study: This technical review critically examines the innovative geotechnical solutions for sustainable infrastructure development. The content presented in this manuscript will be beneficial to professionals in the area of geotechnical engineering. Methodology: Recent relevant published articles in the area of innovative geotechnical solutions for sustainable infrastructure development were consulted. These include journal articles, conference papers, Asian Development Bank articles and unpublished doctoral documents. Discussion: The six main environmental objectives of the Taxonomy Regulation to ensure the contours of an environmentally sustainable infrastructure were stated to include: (1) sustainable protection and use of marine and water resources (2) pollution control and prevention (3) switch to a circular economy (4) mitigation of climate change (5) restoration and protection of ecosystems and biodiversity and (6) adaptation of climate change. The three phase methods for sustainability infrastructure development in geotechnics were critically discussed. An imaginary excavation site in the municipality of Rozzano was referenced as a case study to reveal the application of the proposed methodology to the soil treatment systems. It was noticed that the adoption of an LCA introduces additional deep knowledge and the required quantitative analysis for sizing the assessment. Conclusion: The examined innovative geotechnical solutions were contributory to sustainable infrastructure development.

Blue carbon storage in a sub-Antarctic marine protected area

High-latitude ecosystems have been overlooked in carbon budgets, which traditionally focus on mangroves, salt marshes, and seagrasses. The benthic assemblages and their Nature Contributions to People in Namuncurá – Burdwood Bank I and II, two offshore sub-Antarctic Marine Protected Areas (MPAs), are the conservation values. Here we show that the carbon reservoirs of these MPAs can be greater than those of their Antarctic counterparts, which, together with their extension, emphasize the need to maintain their protected status. Considering their total area, these MPAs stored in biomass 52,085.78 Mg C, corresponding 34,964.16 Mg to organic carbon (OC) and 17,121.62 Mg to inorganic carbon (IC). Surficial sediments stored 933,258,336 Mg C with 188,089,629 Mg of OC and 745,168,707 Mg of IC. However, when accounting for CO2 production through CaCO3 precipitation, the IC fractions decrease to 3,150.37 Mg C and 137,111,042 Mg C for biomass and sediments, respectively. We assume low sediment deposition due to the oceanic location, as direct sedimentation rates for these areas are unavailable. Most blue carbon assessments have focused solely on OC, despite the formation of CaCO3 releases CO2, decreasing net carbon storage. We compared various approaches for incorporating carbonates into carbon estimations. These results underscore the importance of including IC into carbon assessments and highlights the importance of sub-Antarctic benthic ecosystems as nature-based solutions to climate change.

Heat Stress Impacts on Coral Reef Ecosystems and Communities: An Evaluation of Visitor Perceptions, Behaviors and Substitution Effects in the Florida Keys National Marine Sanctuary, USA

Evaluating the effects of environmental events across both biophysical and social dimensions is important in establishing a holistic view of such events. This study focuses on the impact of a devastating heat stress incident that occurred in many locations across the Caribbean region and South Atlantic during the 2023 summer season. The survey and focus of data collection was within Monroe County, a unique nature-based setting south of Miami, Florida, USA. The impact of the heat wave is still being calculated at the time of submission of this paper, but indications are that there was a major negative impact. The survey and data collection sought to understand recreationists’ perceptions, knowledge, and behavior changes as result of the heat stress impact in the Florida Keys. Respondents were interviewed during community workshops in person and through an online sample of boating/angler license holders. The results indicated a change in behavior by some respondents, which may have a longer-term economic impact, along with trends of satisfaction with outdoor recreation over time. This rapid survey method can be applied to future scenarios where social and economic data are needed to fully contextualize environmental impacts in addition to biological endpoints.

Sea Country Indigenous Protected Areas: Indigenous leadership in the protection of Australia’s marine environments

Australia’s diverse marine environments have been protected and managed by Aboriginal and Torres Strait Islander People since time immemorial, and as an inherent function of their rights and cultural responsibilities. Aboriginal and Torres Strait Islander People around Australia have successfully established Sea Country Indigenous Protected Areas (IPAs), a system of Indigenous-driven collaborative governance and management for protected areas that is unique to Australia. To date, there are fourteen Sea Country IPAs protecting over four million hectares of Sea Country around Australia. This story of Indigenous-led management of traditional sea estates continues to gain recognition in Australia. Though not established under legislation, marine areas within Sea Country IPAs are consistent with the IUCN protected area definition as areas dedicated and managed “by legal and under effective means” and are formally recognised by the Australian Government as part of Australia’s MPA estate. We discuss the enabling factors that have contributed to the success of IPAs in Australia, drawing on the experiences of Traditional Owners presenting at IMPAC5,11IMPAC5-LCS-1514 Sea Country Indigenous Protected Areas: Indigenous Leadership In The Protection Of Australia’S Marine Environments. 7th February 2023 and also the challenges to fully enable Traditional Owners to affirm their rights, roles and responsibilities as coastal and marine managers. Overcoming these challenges provides a pathway for Indigenous-led frameworks, recognition and practice of Indigenous rights and interests for the active management of Australia’s marine protected areas.

Growth and Survival Rate of Pocillopora spp. Fragments on Coral Tree and Coral Table Media in Semut Kecil Island, Anambas Islands

Graphical Abstract Highlight Research Pocillopora spp. coral fragments have been identified and analyzed. Growth of new coral polyp tissue on skeletal media and substrate. The presence of coral bleaching was caused by sedimentation and algal growth that covered the fragments. The effectiveness of the media for transplantation. Abstract Pulau Semut Kecil, Anambas Islands, are located within the coral reef triangle, as one of the largest Marine Protected Areas (MPAs) in Indonesia. Coral reefs possess significant functional attributes within ecosystems, and their condition is progressively deteriorating due to anthropogenic activities. This situation necessitates restoration endeavors, primarily through coral transplantation methodologies. The methods involved the introduction or relocation of donor corals into substrates such as tree transplantation media and tables, exhibiting high success rates. This study was conducted to determine the growth and survival rate of Pocillopora spp. The direct survey approach was used and the different coral transplanting media were statistically analyzed with the ANOVA test and SPSS software. The results of the growth of coral fragments Pocillopora spp. Reported coral tree media and table with an average value of 0.55 cm/month and 0.15 cm/month. The survival rate of Pocillopora spp. coral fragments in tree media and table was 97.3% and 87.0%. The media for dropping coral trees and table did not affect the growth and survival rate. This coral transplantation method can facilitate for the restoration of degraded ecosystem and ecological succession.

Coral reef recovery in a remote and large marine protected area is resilient to cascading trophic interactions

Large marine protected areas (MPAs) will likely multiply worldwide to address accelerating biodiversity loss. Coral reefs are an especially at-risk ecosystem, but our understanding of whether and how large MPAs will benefit reef recovery from disturbances remains limited. Here, we evaluate how fishes influence coral reef recovery and if there are cascading trophic interactions in the fish community that influence recovery. We combine i) a meta-analysis of previous research evaluating how fishes affect coral reef succession, ii) field surveys of sharks, fishes, and benthic cover, and iii) a 2.5-year coral recruitment experiment of caged, uncaged, and partially caged settlement tiles in a remote and large MPA, in the Chagos Archipelago. In both our meta-analysis and field experiment, we found variable effects of fishes on coral recruitment with no overall significant effect, but strong control by fishes on the developing benthic communities, where fishes promote crustose coralline algae and reduce macroalgae. Within the Chagos, fishes had a positive effect on corals in protected microhabitats but a negative effect on exposed surfaces, leading to an overall neutral effect from fishes. Although mesopredatory fish abundance was negatively correlated with shark abundance, these top-down effects did not cascade down the food web through herbivores and corallivores to coral recruitment and benthic succession. Thus, our results suggest that within this large MPA, herbivores are important in limiting algae during recovery and there are compensatory responses to the loss of benthic feeding fishes and sharks, with implications for coral reef persistence in the face of global change.

Kebijakan Pemerintah dalam Pengelolaan Sumber Daya Alam: Studi Kasus Indonesia

This study shows that government policies face major challenges in managing natural resources in Indonesia, especially in the fields of fisheries, plantations and mining. Government policies in managing natural resources must be implemented optimally, fairly, sustainably and environmentally friendly. In the fisheries sector, government policies must pay attention to the principles of sustainability, setting fishing quotas and protecting marine protected areas. However, implementation often faces complex regulatory challenges and resistance from industry stakeholders. In the plantation sector, government policies must ensure that plantation business activities can run optimally and provide benefits to the surrounding community. The administrative sanctions imposed must be more effective than just fines. In the mining sector, government policies must consider land rights and mining rights. Mineral rights do not eliminate rights to the land above them and must be regulated based on an agreement between the parties involved. Possible solutions to increase the efficiency and effectiveness of policy implementation include improving coordination between government institutions and increasing institutional capacity. Community participation in decision making is also an important element in sustainable natural resource management.

Factors affecting fishermen’s intention to support the newly proposed Marine Protected Area (MPA) in Malacca

It is crucial to comprehend the factors influencing fishermen's support for a newly established Marine Protected Area (MPA) in Malacca. This understanding aids in calculating stakeholder perspectives and informs decision-making processes related to marine management. The research objectives were to identify fishermen's perception towards the newly proposed MPA in Malacca and determine the factors affecting their intention to support it. A total of one hundred fifty respondents were enlisted through a questionnaire that specifically targeted the fishermen in the Jasin area of Malacca, who were primarily affected by the gazettement of the MPA. The selection of respondents from nine fishermen bases was via stratified random sampling technique. The theory of planned behaviour (TPB) formed the foundation for comprehending the fishermen's intention to provide support. The factors were specifically mentioned. The outcome proved advantageous for the Department of Marine Parks Malaysia in comprehending the fishermen's perception and, consequently, making suitable decisions regarding the well-being of the impacted fishermen.

Assessing the vulnerability of Elasmobranch species in the Bay of Bengal: Insights from Lakkha gill net fishery of Bangladesh

The elasmobranch population is declining in the Bay of Bengal of Bangladesh due to large-mesh gill net fishing, locally known as the Lakkha net, which primarily targets Indian threadfin (Leptomelanosoma indicum). This study was the first attempt to identify megafaunal bycatch in Lakkha fishing and assess its vulnerability using Productivity Susceptibility Analysis. A total of 40 elasmobranch bycatch species were identified, with sharks comprising 13 species from three families, while 27 rays belonged to six families, with the majority belonging to the Myliobatiformes order (60 %). Productivity and susceptibility scores were assigned to all identified species, with values ranging from 1.27 to 2.73 and 1.50 to 2.63, respectively. The target Lakkha fish exhibited the highest susceptibility score, followed by several pelagic sharks and eagle rays. Vulnerability assessment revealed that 31.7 % (n = 13) of species were highly vulnerable, while 43.9 % (n = 18) were classified as moderate, and 24.4 % (n = 10) were considered to have low vulnerability. All the high-risk megafauna species (n = 13) are classified as threatened by the global IUCN Red List. Sensitivity analysis highlighted susceptibility as a major contributor to species’ vulnerability. Alterations in susceptibility scores led to significant changes in the vulnerability status of many species. The overall data quality assessment indicated moderate data quality across species, with variability observed between productivity (76 % of species received a poor data quality score) and susceptibility attributes. However, vulnerability of these species can be reduced through adequate gear modification, shorter net deployment periods, adoption of safe discharge techniques, identification of critical habitats, and establishment of marine protected areas within this region. This study provides valuable insights into the species composition and vulnerability of elasmobranchs in the Lakkha gill net fishery, emphasizing the need for conservation measures to mitigate bycatch impacts on threatened species.

Assessment of Octocoral‐Dominated Benthic Assemblages Along a Mesophotic Gradient, With a Focus on the Impact of Lost Fishing Gears

ABSTRACTCoralligenous, a typical Mediterranean mesophotic habitat, is a highly diverse assemblage, severely threatened by several stressors, including fishing litter. To characterise the coralligenous of the upper mesophotic of the Portofino Promontory (Ligurian Sea, Italy), video transects at 35 and 50 m depth were performed at four sites. Benthic assemblages and lost fishing gears were recorded, and the two depths compared. A higher coverage of taxa with complex 3D structures was found at 50 m, mainly due to the gorgonian Paramuricea clavata. However, the overall low density of this species (0.4–6.6 colonies/m2), together with the impact caused by 120 fishing lines found along the transects, highlights the need for tailored conservation measures. With climate change moving further down the water column and fishing impacts being a major cause of degradation, the design of marine protected areas needs to be extended to include mesophotic depths, contributing to the 30 × 30 targets agreed upon at the COP15.

Assessments of expected MPA outcomes can inform and improve biodiversity conservation: Case studies using The MPA Guide

Global, regional, and national targets have been set to protect and conserve at least 30 % of the ocean by 2030, in recognition of the important benefits of healthy ocean ecosystems, including for human well-being. Many of these targets recognize the importance of the quality, not just quantity, of areas that are included in the 30 %, such as marine protected areas (MPAs). For example, the Convention on Biological Diversity’s Global Biodiversity Framework Target 3 calls for areas to be effectively conserved and managed, ecologically representative, well-connected, and equitably governed. Protecting a percent area is not the sole goal – protection must be effective and equitable. To better understand the quality of biodiversity conservation afforded, in addition to the quantity of area protected, we looked at MPAs across 13 studies that used The MPA Guide and related tools to track Stage of Establishment and Level of Protection as measures of expected biodiversity conservation outcomes across diverse locations, scales, and cultural, political, and conservation contexts. We show that standardized assessments of MPA quality can help to (1) evaluate and improve existing MPAs; (2) plan new MPAs; (3) compare the quality of MPA protection across various scales; (4) track MPA quality, including progress towards coverage targets; (5) enable clear communication and collaboration, and (6) inform actions needed to achieve policy targets and their underlying environmental and social goals, among others. We share common opportunities, challenges, and recommendations for tracking MPA quality at various scales, and using these quality assessments to measure progress towards global targets.

Stakeholder perceptions of the Commission for the Conservation of Antarctic Marine Living Resources Marine Protected Area planning process

Establishing Marine Protected Areas (MPAs) in international waters is critical for the conservation of marine biodiversity. The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) is a global leader in high seas conservation, having established two international MPAs in Antarctica’s Southern Ocean, as part of a commitment to establish a representative system of MPAs for the CAMLR Convention Area. CCAMLR MPAs are adopted by consensus. However, consensus decision-making has slowed the MPA adoption process, and since 2016 the Commission has been unable to agree and implement further MPAs, which has stalled the development of the circumpolar representative system. The key aim of this study was to identify how features of the planning process contribute to outcomes, problems and solutions. We conducted semi-structured interviews with 18 scientists, policymakers, and expert observers from fisheries and environmental non-government organisations involved in CCAMLR MPA planning, to explore their perceptions (experiences, opinions, impressions) of the planning process. Our results identify four key features that are influential across multiple areas of the CCAMLR MPA planning and decision-making process: i) a lack of common understanding; ii) the influence of historical relationships and legacy in subsequent planning processes; iii) inconsistencies between expectations of and requirements for MPA planning; and iv) the degree to which CCAMLR principles and practices, norms, and values are shared. We demonstrate how these four features may help or hinder the effectiveness of the current planning process. We then make suggestions regarding how the planning process could be adapted to capitalise on these features.

Changing the focus: The need for cross-scale dynamic management in the Southern Ocean and implications for holistic conservation of Antarctic marine living resources

The Convention on the Conservation of Antarctic Marine Living Resources (CCAMLR) establishes the regulatory framework for fisheries management and the establishment of Marine Protected Areas (MPA) in the Southern Ocean. Identifying foraging areas regularly used by penguins provides valuable information for the small-scale management of the krill fishery and the design of MPAs, currently under discussion in CCAMLR. We used geolocators to identify the areas used by Adélie penguins from Ardley Island (South Shetlands Islands) during the non-breeding season and Stable Isotope Analysis (SIA) (δ13 C and δ15 N) on feathers to study the trophic niche. Adélie penguins depended on resources available in CCAMLR subareas 48.1 and 48.5 during the post-breeding and molting stage, the subarea 48.5 during the post-molting stage and subareas 48.1, 48.2 and 48.5 during the pre-breeding stage, critical moments of the species’ annual cycle. The Domain 1, Weddell Sea and SOISS MPA proposal areas were extensively used. SIA results show the use of coastal and off-shore foraging areas in 2022, but principally off-shore areas in 2021. Adélie penguins dependence on resources from different subareas in different times of the year emphasizes the need of incorporating the temporal dimension of resources utilization when designing conservation measures in the Southern Ocean. With an increasing pressure on Adélie penguin colonies in the western Antarctic Peninsula, its long-term protection might depend on both 1) well designed and managed MPAs in the Domain 1 and the Weddell Sea, and 2) small-scale fisheries management that simultaneously consider activities undertaken in different small-scale management units.

Post-Pandemic Shifts in Pro-Environmental Attitudes and Behaviors in a Marine Protected Area

Interest in understanding environmental attitudes and behaviors after traumatic events has been widely studied, but research specific to the COVID-19 pandemic has yielded inconclusive results. This study addresses a gap by exploring the relationship between COVID-19 and pro-environmental behavior (PEB) in marine protected areas (MPAs), which are vital for preserving marine ecosystems and biodiversity. We focus on scuba divers’ environmental attitudes and behaviors within an MPA, using a mixed methodology that combines surveys based on the New Ecological Paradigm (NEP) scale with covert participant observation. Our findings indicate a moderate increase in pro-environmental concerns post-pandemic, particularly regarding nature’s fragility. However, a gap remains between expressed attitudes and actual behaviors, with notable differences in pro-ecological behavior during leisure activities compared to behavior at home. Additionally, risk perception related to COVID-19 has gained prominence, often overshadowing environmental concerns. This study contributes to a better understanding of environmental attitudes and behaviors in the context of MPAs during the ongoing social changes post-COVID-19. These insights can guide more sustainable management of MPAs and inform future research, which should further explore these trends in similar contexts.

Stable isotope spatial patterns for the Southwest Atlantic Ocean towards polar waters

Mapping stable isotope gradients (isoscapes) has become a powerful tool to understand and forecast the status and variability of marine ecosystems at different levels of ecological organization. To differentiate five marine areas from the Southwest Atlantic Ocean towards oceanic and polar waters, a key foraging area for many marine consumers, we built isoscapes at different spatial scales using carbon (δ13C) and nitrogen (δ15N) isotope values of phytoplankton, zooplankton and particulate organic matter in sediment. We analyzed the isotopic variability between marine areas in relation with oceanographic parameters (e.g. temperature, salinity) and geographical sampling site data (e.g. latitude, longitude). We collected samples during 6 oceanographic surveys conducted in spring and autumn between 2014 and 2019 at the Beagle Channel, the Atlantic coast of Tierra del Fuego and Burdwood Bank. We included also published isotopic data of zooplankton from two other oceanic areas (the Polar Frontal Zone and Polar Antarctic Peninsula waters) to construct large-scale isoscapes. We found that the marine areas analyzed have substantially different δ13C and δ15N baselines; some differences exist between spring and autumn but the general pattern of isotopic variability remains similar. Combining different biological components and spatial scale analysis, isotopic variability was found to be related to variables such as seawater temperature, depth, chlorophyll and nutrients. The generated data will enhance the efficacy of isoscapes in long-term monitoring initiatives that documents alterations in attributes and features across marine expanses. This is particularly pertinent to areas under legal protection, such as the oceanic Marine Protected Areas (MPAs) established in Argentine waters.

A deep learning classification framework for research methods of marine protected area management

The latest emerging transdisciplinary marine protected area (MPA) research scheme requires efficient approaches for theoretically based and data-driven method integration. However, due to the rapid development and diversification of research methods, it is growingly difficult to locate new methods in methodological dimensions and integrate them to the utmost utility. This study proposes a deep learning-based classification framework for MPA management methods focused particularly on data and theory capabilities using natural language processing (NLP). It extracted keywords from academic sources and performed clustering based on semantic similarity, generating benchmark texts for abstract labeling. By training the deep learning NLP model and analyzing the abstracts of 9049 MPA management empirical research articles from 1986 to 2024, the data and theory scores were attributed to each article, and a total of 19 major method categories and 110 segment branches were identified in qualitative, quantitative, and mixed genres. Combination types of research methods were summarized, yielding the data-theory neutralization principle where the average data and theory scores tend to approximate 0.50. Applying the principle broadens traditional boundaries for method integration and extends method synthesis to higher numbers, generating a practical research 2paradigm for future MPA research. Implications include bridging social and ecological data, theorizing emergent challenges in complex systems and integrating theory construction and data science. The framework is applicable to quantification of other environmental management disciplines and can serve as guidance for multidisciplinary method integration.© 2017 Elsevier Inc. All rights reserved.