Ocean & Coastal Management最新文献_第2页

A novel risk analysis approach for the liquefication of nickel ore cargo using fault tree analysis integrated failure mode and effect analysis

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-13 DOI: 10.1016/j.ocecoaman.2025.107617

Murat Alkaç , Devran Yazır , Yunus Emre Senol , Ünal Özdemir

Liquefaction is the phenomenon in which a material with soil-like properties rapidly transitions from a solid, dry state to a nearly fluid state, posing significant risks to maritime safety. This study employs Fuzzy Fault Tree Analysis (FFTA) and Failure Mode and Effect Analysis (FMEA) to systematically evaluate the risks associated with nickel ore liquefaction. The data were derived from expert consultations, literature review, and theoretical modeling to ensure a robust assessment framework. The analysis revealed that the probability of nickel ore liquefaction is 0.1192, with human-related factors contributing to approximately 54% of all risks. Additionally, the integration of severity and detectability values identified ‘leaking from hatch cover rubbers' as the most critical failure mode, emphasizing the need for enhanced monitoring and crew training. This study uniquely integrates FFTA and FMEA to address human-factor-driven risks in maritime transportation. Unlike existing approaches, this dual-framework method prioritizes failure modes based on both probabilistic and consequence-based analyses, offering actionable insights for improving maritime safety. Compared to traditional methods, the proposed framework provides a comprehensive risk prioritization by integrating probabilistic analysis with consequence evaluation, allowing for more precise risk mitigation strategies.

{"title":"A novel risk analysis approach for the liquefication of nickel ore cargo using fault tree analysis integrated failure mode and effect analysis","authors":"Murat Alkaç , Devran Yazır , Yunus Emre Senol , Ünal Özdemir","doi":"10.1016/j.ocecoaman.2025.107617","DOIUrl":"10.1016/j.ocecoaman.2025.107617","url":null,"abstract":"<div><div>Liquefaction is the phenomenon in which a material with soil-like properties rapidly transitions from a solid, dry state to a nearly fluid state, posing significant risks to maritime safety. This study employs Fuzzy Fault Tree Analysis (FFTA) and Failure Mode and Effect Analysis (FMEA) to systematically evaluate the risks associated with nickel ore liquefaction. The data were derived from expert consultations, literature review, and theoretical modeling to ensure a robust assessment framework. The analysis revealed that the probability of nickel ore liquefaction is 0.1192, with human-related factors contributing to approximately 54% of all risks. Additionally, the integration of severity and detectability values identified ‘leaking from hatch cover rubbers' as the most critical failure mode, emphasizing the need for enhanced monitoring and crew training. This study uniquely integrates FFTA and FMEA to address human-factor-driven risks in maritime transportation. Unlike existing approaches, this dual-framework method prioritizes failure modes based on both probabilistic and consequence-based analyses, offering actionable insights for improving maritime safety. Compared to traditional methods, the proposed framework provides a comprehensive risk prioritization by integrating probabilistic analysis with consequence evaluation, allowing for more precise risk mitigation strategies.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"264 ","pages":"Article 107617"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of temporal community-led marine protected areas on fishery income in southern Thailand

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-13 DOI: 10.1016/j.ocecoaman.2025.107618

Kunlayanee Pornpinatepong, Sukampon Chongwilaikasaem, Sinad Treewanchai, Sakchai Kiripat, Sopin Jirakiattikul, Papitchaya Saelim, Chalerm Jaitang

This study examined the impact of temporal community-led marine protected areas (tCMPAs) on the fishery income of small-scale fishing households in southern Thailand. These fishing communities encounter numerous challenges, including destructive fishing practices, environmental degradation, and limited market access, jeopardizing their livelihoods. As a bottom–up approach to marine conservation and fisheries management, tCMPAs have been implemented across Thailand with promising results, such as increased fish diversity and abundance. However, their effects on fishing income require further investigation. This study assessed the impact of tCMPAs on fishery income in Nakhon Si Thammarat (treatment/tCMPA group) and Songkhla (control/non-tCMPA group) through a household survey. The propensity score matching analysis revealed a statistically significant increase in fishery productivity values in the tCMPA regions. The robustness of the findings was confirmed using the difference-in-differences method on a different dataset. The study highlights perceived improvements in fish catch trends and fish size among households in the tCMPA group; in contrast, no improvements were observed in the control group. Decentralizing fishing control through community-based management is a practical and effective strategy for coastal resource management. We recommend its broader adoption for sustainable fishery practices.

{"title":"Impact of temporal community-led marine protected areas on fishery income in southern Thailand","authors":"Kunlayanee Pornpinatepong, Sukampon Chongwilaikasaem, Sinad Treewanchai, Sakchai Kiripat, Sopin Jirakiattikul, Papitchaya Saelim, Chalerm Jaitang","doi":"10.1016/j.ocecoaman.2025.107618","DOIUrl":"10.1016/j.ocecoaman.2025.107618","url":null,"abstract":"<div><div>This study examined the impact of temporal community-led marine protected areas (tCMPAs) on the fishery income of small-scale fishing households in southern Thailand. These fishing communities encounter numerous challenges, including destructive fishing practices, environmental degradation, and limited market access, jeopardizing their livelihoods. As a bottom–up approach to marine conservation and fisheries management, tCMPAs have been implemented across Thailand with promising results, such as increased fish diversity and abundance. However, their effects on fishing income require further investigation. This study assessed the impact of tCMPAs on fishery income in Nakhon Si Thammarat (treatment/tCMPA group) and Songkhla (control/non-tCMPA group) through a household survey. The propensity score matching analysis revealed a statistically significant increase in fishery productivity values in the tCMPA regions. The robustness of the findings was confirmed using the difference-in-differences method on a different dataset. The study highlights perceived improvements in fish catch trends and fish size among households in the tCMPA group; in contrast, no improvements were observed in the control group. Decentralizing fishing control through community-based management is a practical and effective strategy for coastal resource management. We recommend its broader adoption for sustainable fishery practices.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"264 ","pages":"Article 107618"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Systematic analysis and optimization of operational delay factors in port supply chains using a hybrid DEMATEL-OPA-DGRA approach

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-08 DOI: 10.1016/j.ocecoaman.2025.107620

Negar Karimi , Ehsan Javanmardi , AhmadReza Nadaffard , Francesco Facchini

Amid global supply chain disruptions, seaports play a critical role in maintaining goods flow. However, operational delays remain a key challenge in port supply chains. This study systematically identifies and ranks factors contributing to these delays using a hybrid methodology that combines the Decision-Making Trial and Evaluation Laboratory (DEMATEL), the Ordinal Priority Approach (OPA), and Dynamic Grey Relational Analysis (DGRA). Five main criteria of operational delays in ports were assessed: port management, shipping and navigation, port terminal operator, customs, and cargo owners. The study's results identified 'Poor management of goods flow' and 'Customs-related issues' within port management as the most critical factors contributing to delays. Additionally, 'Ship structure' and 'Late arrival of ships' were highlighted as significant contributors under the shipping and navigation category. Notably, 'Operational cost optimization' and 'Expertise of operational staff' were found to be pivotal in the port terminal operator category, reflecting their substantial impact on operational efficiency. This study reveals interdependencies among delay factors and highlights essential intervention points to enhance port functionality. The findings suggest strategies to improve global trade efficiency and economic stability in coastal regions through better supply chain management, ultimately enhancing port resilience by enabling more robust and reliable operations during disruptions.

{"title":"Systematic analysis and optimization of operational delay factors in port supply chains using a hybrid DEMATEL-OPA-DGRA approach","authors":"Negar Karimi , Ehsan Javanmardi , AhmadReza Nadaffard , Francesco Facchini","doi":"10.1016/j.ocecoaman.2025.107620","DOIUrl":"10.1016/j.ocecoaman.2025.107620","url":null,"abstract":"<div><div>Amid global supply chain disruptions, seaports play a critical role in maintaining goods flow. However, operational delays remain a key challenge in port supply chains. This study systematically identifies and ranks factors contributing to these delays using a hybrid methodology that combines the Decision-Making Trial and Evaluation Laboratory (DEMATEL), the Ordinal Priority Approach (OPA), and Dynamic Grey Relational Analysis (DGRA). Five main criteria of operational delays in ports were assessed: port management, shipping and navigation, port terminal operator, customs, and cargo owners. The study's results identified 'Poor management of goods flow' and 'Customs-related issues' within port management as the most critical factors contributing to delays. Additionally, 'Ship structure' and 'Late arrival of ships' were highlighted as significant contributors under the shipping and navigation category. Notably, 'Operational cost optimization' and 'Expertise of operational staff' were found to be pivotal in the port terminal operator category, reflecting their substantial impact on operational efficiency. This study reveals interdependencies among delay factors and highlights essential intervention points to enhance port functionality. The findings suggest strategies to improve global trade efficiency and economic stability in coastal regions through better supply chain management, ultimately enhancing port resilience by enabling more robust and reliable operations during disruptions.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"263 ","pages":"Article 107620"},"PeriodicalIF":4.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural analysis and robustness assessment of global LNG transport network from 2013 to 2023

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-08 DOI: 10.1016/j.ocecoaman.2025.107619

Yang Xu , Peng Peng , Xiaowei Xie , Feng Lu

Liquefied natural gas (LNG) is a critical component of the global sustainable energy industry, with substantial implications for global energy development. Although the maritime transportation system has played an important role in promoting global LNG trade, it remains highly vulnerable to international political events, major disasters, and other emergencies. To better understand the robustness and security of the global LNG transport system, this study provides a new analysis paradigm for evaluating the robustness of the LNG transport network in the face of disruptive events. We examine a variety of network parameters for the global LNG transport network between 2013 and 2023 to capture changes in topological structure and evolution. Then, we introduce three centrality indices which can capture distinct characteristics of the maritime ports including connectivity, transfer, and cohesion, and combine these three centralities into a TOPSIS framework to achieve a multidimensional port centrality for identifying essential ports. Finally, we evaluate the robustness of the LNG transport network against several sequential intentional attacks using diverse strategies. We found that we can loosely separate the collapse process of the LNG transport network into three stages: initial collapse, ongoing fragmentation, and final collapse. In 2013, intentional attacks based on degrees and TOPSIS centralities were the most likely to cause the LNG transport network to collapse. In 2023, intentional attacks based on betweenness and TOPSIS centralities are the most likely to cause the LNG transport network to collapse, and the LNG transport network is more robust than it was in 2013.

{"title":"Structural analysis and robustness assessment of global LNG transport network from 2013 to 2023","authors":"Yang Xu , Peng Peng , Xiaowei Xie , Feng Lu","doi":"10.1016/j.ocecoaman.2025.107619","DOIUrl":"10.1016/j.ocecoaman.2025.107619","url":null,"abstract":"<div><div>Liquefied natural gas (LNG) is a critical component of the global sustainable energy industry, with substantial implications for global energy development. Although the maritime transportation system has played an important role in promoting global LNG trade, it remains highly vulnerable to international political events, major disasters, and other emergencies. To better understand the robustness and security of the global LNG transport system, this study provides a new analysis paradigm for evaluating the robustness of the LNG transport network in the face of disruptive events. We examine a variety of network parameters for the global LNG transport network between 2013 and 2023 to capture changes in topological structure and evolution. Then, we introduce three centrality indices which can capture distinct characteristics of the maritime ports including connectivity, transfer, and cohesion, and combine these three centralities into a TOPSIS framework to achieve a multidimensional port centrality for identifying essential ports. Finally, we evaluate the robustness of the LNG transport network against several sequential intentional attacks using diverse strategies. We found that we can loosely separate the collapse process of the LNG transport network into three stages: initial collapse, ongoing fragmentation, and final collapse. In 2013, intentional attacks based on degrees and TOPSIS centralities were the most likely to cause the LNG transport network to collapse. In 2023, intentional attacks based on betweenness and TOPSIS centralities are the most likely to cause the LNG transport network to collapse, and the LNG transport network is more robust than it was in 2013.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"263 ","pages":"Article 107619"},"PeriodicalIF":4.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Are efficient ports for port operators also those for shipping companies? A meta-frontier analysis of global top 80 container ports

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-08 DOI: 10.1016/j.ocecoaman.2025.107616

Jing Zhang , Meifeng Luo , Dong Yang

Ports operate in complex environments, each with a unique operating context and multiple stakeholders. Considering port heterogeneity, this paper classifies the world's top 80 container ports into homogenous groups and employs the meta-frontier Data Envelopment Analysis (DEA) method to assess their efficiency. Recognizing the different interests of port operators and shipping companies in port, we incorporate relevant variables for the two stakeholders and compare the port efficiencies evaluated from the two perspectives. The findings are achieved with a dataset comprising port data collected from Lloyd's List, IHS Markit, and Google Earth, alongside ships' data extracted from the Automatic Identification System (AIS). The analysis reveals the disparities in port efficiency among different stakeholders and across different port sizes. Among the 80 container ports, only 4 achieved dual efficiency, while 17 were identified as one-sided frontier ports. Large ports demonstrate relatively consistent efficient performance from both perspectives, benefiting from economies of scale and efficient service delivery. In contrast, small and middle-size ports show inconsistent or even opposing efficiency performance when evaluated by port operators and shipping companies, with many exhibiting low levels of resource utilization or service delivery. This study provides a reference for port operators and shipping companies to enhance overall efficiency.

{"title":"Are efficient ports for port operators also those for shipping companies? A meta-frontier analysis of global top 80 container ports","authors":"Jing Zhang , Meifeng Luo , Dong Yang","doi":"10.1016/j.ocecoaman.2025.107616","DOIUrl":"10.1016/j.ocecoaman.2025.107616","url":null,"abstract":"<div><div>Ports operate in complex environments, each with a unique operating context and multiple stakeholders. Considering port heterogeneity, this paper classifies the world's top 80 container ports into homogenous groups and employs the meta-frontier Data Envelopment Analysis (DEA) method to assess their efficiency. Recognizing the different interests of port operators and shipping companies in port, we incorporate relevant variables for the two stakeholders and compare the port efficiencies evaluated from the two perspectives. The findings are achieved with a dataset comprising port data collected from Lloyd's List, IHS Markit, and Google Earth, alongside ships' data extracted from the Automatic Identification System (AIS). The analysis reveals the disparities in port efficiency among different stakeholders and across different port sizes. Among the 80 container ports, only 4 achieved dual efficiency, while 17 were identified as one-sided frontier ports. Large ports demonstrate relatively consistent efficient performance from both perspectives, benefiting from economies of scale and efficient service delivery. In contrast, small and middle-size ports show inconsistent or even opposing efficiency performance when evaluated by port operators and shipping companies, with many exhibiting low levels of resource utilization or service delivery. This study provides a reference for port operators and shipping companies to enhance overall efficiency.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"263 ","pages":"Article 107616"},"PeriodicalIF":4.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving the level of land‒sea coordination: An integrated framework for identifying and assessing conflicts in coastal areas

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-06 DOI: 10.1016/j.ocecoaman.2025.107600

Jianchun Li , Xiaoyu Zhou , Yanbo Qu , Wenhua Yuan

Urbanized coastal areas face both resource-use and spatial conflicts as a result of rapid development. To improve the level of land‒sea coordination (LSC), a new integrated framework is proposed in this paper for identifying and assessing conflicts, which are termed "point-line-surface" conflicts, on the basis of morphological characteristics. Point conflicts are focused on conflicts in reality, while the other conflict types involve potential conflicts in spatial planning. Drawing upon diverse sources of statistical data concerning land and marine use survey results and spatial plans, we use a general conflict matrix, a geographic grid approach and spatial data analysis to quantitatively measure the intensity and spatial distribution of coastal conflicts. A case study in Laizhou, a county-level coastal city in China, is used to demonstrate this framework. The results show that point conflicts mainly exist between water and wetlands (UWW) and fishery (UF) and between industrial and mining (UIM) and UF. Line conflicts show that the conflict between marine spatial planning (MSP) and urban spatial planning (USP) is greater than that between land spatial planning (LSP) and USP, and surface conflicts indicate that functional zones with high externalities are mainly concentrated near central towns and industrial clusters. The optimization of existing land and ocean use patterns and the coordination of different spatial plans might serve as effective approaches for improving LSC in coastal areas.

{"title":"Improving the level of land‒sea coordination: An integrated framework for identifying and assessing conflicts in coastal areas","authors":"Jianchun Li , Xiaoyu Zhou , Yanbo Qu , Wenhua Yuan","doi":"10.1016/j.ocecoaman.2025.107600","DOIUrl":"10.1016/j.ocecoaman.2025.107600","url":null,"abstract":"<div><div>Urbanized coastal areas face both resource-use and spatial conflicts as a result of rapid development. To improve the level of land‒sea coordination (LSC), a new integrated framework is proposed in this paper for identifying and assessing conflicts, which are termed \"point-line-surface\" conflicts, on the basis of morphological characteristics. Point conflicts are focused on conflicts in reality, while the other conflict types involve potential conflicts in spatial planning. Drawing upon diverse sources of statistical data concerning land and marine use survey results and spatial plans, we use a general conflict matrix, a geographic grid approach and spatial data analysis to quantitatively measure the intensity and spatial distribution of coastal conflicts. A case study in Laizhou, a county-level coastal city in China, is used to demonstrate this framework. The results show that point conflicts mainly exist between water and wetlands (UWW) and fishery (UF) and between industrial and mining (UIM) and UF. Line conflicts show that the conflict between marine spatial planning (MSP) and urban spatial planning (USP) is greater than that between land spatial planning (LSP) and USP, and surface conflicts indicate that functional zones with high externalities are mainly concentrated near central towns and industrial clusters. The optimization of existing land and ocean use patterns and the coordination of different spatial plans might serve as effective approaches for improving LSC in coastal areas.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"263 ","pages":"Article 107600"},"PeriodicalIF":4.8,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143550572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatio-temporal land use change and loss of mangrove forest in two coastal cities in Tanzania and the perceived implications on provisioning of ecosystem services

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-06 DOI: 10.1016/j.ocecoaman.2025.107604

Anasia Elingaya Saria , Xiuzhen Li , Alfonse Dubi , Michael Elias Mgalula , Jinzhou Du

Mangroves supply a diverse range of products and ecological services, both locally and globally. However, our understanding of the anthropogenic drivers of land use change and mangrove loss, as well as loss of ecosystem services in Tanzanian coastal cities is limited. We conducted a study in two selected estuaries: Mtoni in Dar es Salaam and Kisiju in the Pwani area. We determined spatio-temporal land use change in 1980, 2000, and 2020, and conducted socioeconomic questionnaires to examine change drivers and perceived implications on ecosystem services provisioning. We revealed that over the last four decades, there have been considerable changes in land use that resulted in mangrove losses or transitions to the other cover type. The closed mangroves in the Mtoni estuary decreased by −95.63 ha from 1980 to 2000, and -109.87 ha from 2000 to 2020. In the Kisiju estuary from 1980 to 2000, the fraction of closed mangroves declined by −74.5 ha and 23.5 ha between 2000 and 2020. The emergence of open mangroves by different fractions is a result of losses occurred on closed mangroves through forest clearing for charcoal production, firewood, and building resulting in barren land. The attributing drivers of change population growth and the associated unsustainable land use practices related to farming, cutting trees for charcoal making, fuelwood, and building materials. Climate change events such as storms, rising sea levels and temperatures as well as flood events have contributed to death of mangroves. The loss of ecosystem services such as reduced fish catch, deterioration of critical breeding grounds for fish, exposure to flood hazards, storms and sedimentation are the perceived outcomes of the loss of mangroves and unsustainable land use change. The loss of mangroves has reduces their ability to protect coastal communities from flooding and loss of the potential to sequester carbon and mitigate climate change. Our findings, recommended for improving mangrove conservation and adaptive integrated approaches are needed to conserve these important ecosystems.

{"title":"Spatio-temporal land use change and loss of mangrove forest in two coastal cities in Tanzania and the perceived implications on provisioning of ecosystem services","authors":"Anasia Elingaya Saria , Xiuzhen Li , Alfonse Dubi , Michael Elias Mgalula , Jinzhou Du","doi":"10.1016/j.ocecoaman.2025.107604","DOIUrl":"10.1016/j.ocecoaman.2025.107604","url":null,"abstract":"<div><div>Mangroves supply a diverse range of products and ecological services, both locally and globally. However, our understanding of the anthropogenic drivers of land use change and mangrove loss, as well as loss of ecosystem services in Tanzanian coastal cities is limited. We conducted a study in two selected estuaries: Mtoni in Dar es Salaam and Kisiju in the Pwani area. We determined spatio-temporal land use change in 1980, 2000, and 2020, and conducted socioeconomic questionnaires to examine change drivers and perceived implications on ecosystem services provisioning. We revealed that over the last four decades, there have been considerable changes in land use that resulted in mangrove losses or transitions to the other cover type. The closed mangroves in the Mtoni estuary decreased by −95.63 ha from 1980 to 2000, and -109.87 ha from 2000 to 2020. In the Kisiju estuary from 1980 to 2000, the fraction of closed mangroves declined by −74.5 ha and 23.5 ha between 2000 and 2020. The emergence of open mangroves by different fractions is a result of losses occurred on closed mangroves through forest clearing for charcoal production, firewood, and building resulting in barren land. The attributing drivers of change population growth and the associated unsustainable land use practices related to farming, cutting trees for charcoal making, fuelwood, and building materials. Climate change events such as storms, rising sea levels and temperatures as well as flood events have contributed to death of mangroves. The loss of ecosystem services such as reduced fish catch, deterioration of critical breeding grounds for fish, exposure to flood hazards, storms and sedimentation are the perceived outcomes of the loss of mangroves and unsustainable land use change. The loss of mangroves has reduces their ability to protect coastal communities from flooding and loss of the potential to sequester carbon and mitigate climate change. Our findings, recommended for improving mangrove conservation and adaptive integrated approaches are needed to conserve these important ecosystems.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"263 ","pages":"Article 107604"},"PeriodicalIF":4.8,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping the global co-location potential of offshore wind energy and aquaculture production

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-06 DOI: 10.1016/j.ocecoaman.2025.107605

Jackson Stockbridge , Christopher J. Brown , Caitlin D. Kuempel

Co-location of offshore industries has potential to mitigate the growing congestion in the oceans and support the use of ocean resources for ecologically sustainable economic growth and improved livelihoods (i.e., the blue economy). Despite the benefits, questions remain over the feasibility of co-location due to regulatory and financial risk concerns. Here, we combine existing data on aquaculture production potential and wind energy production potential to map co-location potential for offshore wind and aquaculture (finfish, bivalve, and seaweed) globally. We then incorporate an existing index of each country's blue economy development capacity to assess areas with the greatest opportunity for co-location. Finally, we assess co-location potential in the Bass Strait, Australia to show how our approach can inform regional-level planning. We found potential for co-location across 395,042 km² of Exclusive Economic Zones (EEZ) globally for bivalves, 1,337,874 km² for finfish, and 1,143,643 km² for seaweed across 97 countries. Argentina, Australia, and Russia had the largest potential area for co-location, while Uruguay, Lithuania, and Belgium had the largest proportion of their EEZ. Denmark, Canada, and Finland had the largest proportion of potential area for co-location and highest capacity for blue economy development, signifying potential opportunities to be leaders in co-location implementation. Finally, the Bass Strait had high co-location potential for offshore wind and finfish aquaculture, but less for seaweed and bivalve production. Our research provides a high-level assessment of co-location across scales that can be used to streamline planning efforts, capitalise on potential opportunities, reduce risks, and facilitate blue economic growth.

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引用次数: 0

The evolution of equity in offshore renewable energy: A systematic literature review

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-05 DOI: 10.1016/j.ocecoaman.2025.107603

Mohammad Nasir Tighsazzadeh , Andréanne Doyon , Shana Lee Hirsch , Andrés M. Cisneros-Montemayor

Offshore renewable energy (ORE) projects are becoming a promising solution in transitioning to cleaner energy, but there are important questions regarding the governance and policy goals of such projects, particularly given frequent opposition from local communities who do not believe these projects lead to equitable benefits. This study explores the relationship between ORE and equity, analyzing how the concept of equity has been conceptualized over the last two decades. A systematic review of this scholarship shows that research from various disciplines has investigated and narrowed the broad concept of equity to a few core considerations, but these have not yet been specifically integrated to inform ORE. These equity considerations have so far evolved through three stages. First, the initial focus was on the cause-and-effect relationships between public perception, conflicts, and acceptance, showing that divergent stakeholder perceptions of ORE can lead to social conflicts, and consequently, low public acceptance. This highlights the importance of recognitional justice to ensure that all stakeholder perspectives are acknowledged and valued. The second stage sheds light on public engagement as a potential solution for converging different attitudes towards ORE. The third stage introduced the concept of energy justice into ORE equity studies, emphasizing the need for equal consideration of energy justice principles. Based on this, we recommend that research and development in ORE adopt a context-appropriate definition of equity and use transdisciplinary methods to facilitate collaboration and integration on unique local social, economic, and ecological conditions. In addition, future research should strive for flexible ORE processes that encompass all principles of energy justice and minimize negative trade-offs by prioritizing local goals. These strategies aim to ensure ORE projects are developed with a strong emphasis on equity and justice that can enable a transition to cleaner energy while respecting local goals and redressing past injustice.

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引用次数: 0

Seafood harvesting practices in critical nursery habitat of Asian horseshoe crabs in northern Beibu Gulf, China: Suggestions for conservation management

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management

Pub Date : 2025-03-04 DOI: 10.1016/j.ocecoaman.2025.107606

Chun-Chieh Wang , Kit Yue Kwan , Ruifang Chen

Mangrove forests are among the most productive ecosystems. Horseshoe crabs, an ecologically important marine taxon, are particularly reliant on this ecosystem. However, their populations are increasingly threatened across the geographic range, especially the three Asian horseshoe crab species in Indo-Pacific Asia. Unlike explicit habitat loss, implicit threats caused by artisanal fishing remain largely unrecognized for these Asian species. Seafood harvesting in intertidal zone (SHIIZ) is among the dominant artisanal fishing activities in China. In this study, we quantified the intensity and spatiotemporal patterns of SHIIZ at a critical nursery habitat for horseshoe crabs in a multi-use protected area of the northern Beibu Gulf, China. Adopting drone-based line transects, we surveyed the entire unvegetated tidal flats to estimate harvesting intensity from October 2022 to September 2023 at monthly intervals across the three study sites. Our results demonstrated significant differences in collection intensity among the three sites, with higher intensity from October 2022 to March 2023. Overall, fishers exerted greater intensity than tourists. Across the sites, fishers primarily utilized the middle/lower portions of tidal flats, while tourists aggregated near the mangrove fringes. Despite fishers being the primary contributors, management should focus on the tourists, as their activities significantly overlapped with the core distribution areas of juvenile horseshoe crabs along the mangrove fringes during active season. We recommend quota control, pre-entry education, and real-time guidance to mitigate potential impact of tourists’ seafood harvesting. Strengthening collaboration between management authorities of the study area and local communities would enhance effective implementation of these proposed measures.

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引用次数: 0