This study is based on sightings collected over a 3-year monitoring period, at fixed points in the open waters of Italy's Northern-Central Adriatic Sea. Marine mammals were monitored during the construction of four offshore gas platforms to manage the construction work if any cetaceans approached the vicinity of the sites. A total of 340 common bottlenose dolphin groups were sighted and relative behavioral data were collected and analyzed. Group size (mean ± SD = 4.4 ± 2.67, range = 1–15) varied significantly based on seasonality, behavioral state, and presence of calves, but no synergistic interaction effects were detected. Traveling was the most frequently observed behavior, in 42.3% of sightings. A Multinomial Logistic Regression was used to analyze the probability of occurrence of behavioral states, with season and the presence of calves serving as explanatory variables for behavioral state. Notably, both the analysis performed does not include the human activities as a statistically significant factor in the determination of the group size dynamics and the behavioral choice and, in addition, we identified two pelagic feeding seasons, in the spring and autumn. The data gathered allowed us to provide valuable information on the Italian Adriatic bottlenose dolphin population behavioral traits in the open sea.
{"title":"Behavioral observations on the common bottlenose dolphin (Tursiops truncatus) at fixed points in the open waters of Italy's Northern-Central Adriatic Sea","authors":"Michele Centurelli, Ilaria Biagiotti, Ilaria Costantini, Iole Leonori","doi":"10.1016/j.ocecoaman.2025.107555","DOIUrl":"10.1016/j.ocecoaman.2025.107555","url":null,"abstract":"<div><div>This study is based on sightings collected over a 3-year monitoring period, at fixed points in the open waters of Italy's Northern-Central Adriatic Sea. Marine mammals were monitored during the construction of four offshore gas platforms to manage the construction work if any cetaceans approached the vicinity of the sites. A total of 340 common bottlenose dolphin groups were sighted and relative behavioral data were collected and analyzed. Group size (mean ± SD = 4.4 ± 2.67, range = 1–15) varied significantly based on seasonality, behavioral state, and presence of calves, but no synergistic interaction effects were detected. Traveling was the most frequently observed behavior, in 42.3% of sightings. A Multinomial Logistic Regression was used to analyze the probability of occurrence of behavioral states, with season and the presence of calves serving as explanatory variables for behavioral state. Notably, both the analysis performed does not include the human activities as a statistically significant factor in the determination of the group size dynamics and the behavioral choice and, in addition, we identified two pelagic feeding seasons, in the spring and autumn. The data gathered allowed us to provide valuable information on the Italian Adriatic bottlenose dolphin population behavioral traits in the open sea.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"262 ","pages":"Article 107555"},"PeriodicalIF":4.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-30DOI: 10.1016/j.ocecoaman.2025.107556
Weidong Gu, Zhiyao Yang, Qinxia Yang, Hang Zhang, Yanlin Wang, Qinyi He, Changzi Ge
Spartina alterniflora not only has service functions but also causes ecological disasters; hence, it should be managed adaptively rather than eradicated. The laminae and leaf sheaths differ in functions and the wind pressures on the two plant components are different. Thus, it is inferred that differences in allometric growth between the leaf sheaths and laminae occur in regions with different wind speeds: the laminae become smaller than the leaf sheaths in high-wind-speed regions; the laminae become larger in low-wind-speed regions. To verify this inference, the leaf traits of S. alterniflora along the Xiaoqing River and in the Tiaozini Wetland were investigated. The leaf traits varied with study area: they presented distinct allometric growth curves between laminae and leaf sheaths; the lamina length and area, dry weight of the leaf sheaths, and dry weight of the laminae in the Tiaozini Wetland were smaller than those along Xiaoqing River; S. alterniflora tended to have large leaf sheaths and small laminae in the Tiaozini Wetland. Thus, wind speed affects the allometric growth between the leaf sheaths and laminae, and the lamina size in the high-wind-speed area tend to miniaturize. Measures that can further reduce the lamina size in high-wind-speed areas or enlarge the lamina size in low-wind-speed areas are detrimental to the survival and proliferation of S. alterniflora, and can be used for adaptive management.
{"title":"Wind-driven mechanisms for allometric growth of Spartina alterniflora leaves: Implications for adaptive management","authors":"Weidong Gu, Zhiyao Yang, Qinxia Yang, Hang Zhang, Yanlin Wang, Qinyi He, Changzi Ge","doi":"10.1016/j.ocecoaman.2025.107556","DOIUrl":"10.1016/j.ocecoaman.2025.107556","url":null,"abstract":"<div><div><em>Spartina alterniflora</em> not only has service functions but also causes ecological disasters; hence, it should be managed adaptively rather than eradicated. The laminae and leaf sheaths differ in functions and the wind pressures on the two plant components are different. Thus, it is inferred that differences in allometric growth between the leaf sheaths and laminae occur in regions with different wind speeds: the laminae become smaller than the leaf sheaths in high-wind-speed regions; the laminae become larger in low-wind-speed regions. To verify this inference, the leaf traits of <em>S. alterniflora</em> along the Xiaoqing River and in the Tiaozini Wetland were investigated. The leaf traits varied with study area: they presented distinct allometric growth curves between laminae and leaf sheaths; the lamina length and area, dry weight of the leaf sheaths, and dry weight of the laminae in the Tiaozini Wetland were smaller than those along Xiaoqing River; <em>S. alterniflora</em> tended to have large leaf sheaths and small laminae in the Tiaozini Wetland. Thus, wind speed affects the allometric growth between the leaf sheaths and laminae, and the lamina size in the high-wind-speed area tend to miniaturize. Measures that can further reduce the lamina size in high-wind-speed areas or enlarge the lamina size in low-wind-speed areas are detrimental to the survival and proliferation of <em>S. alterniflora</em>, and can be used for adaptive management.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"262 ","pages":"Article 107556"},"PeriodicalIF":4.8,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105270","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}
Pub Date : 2025-01-29DOI: 10.1016/j.ocecoaman.2025.107542
Matthew M. Holland , Luis Felipe Artigas , Angus Atkinson , Mike Best , Eileen Bresnan , Michelle Devlin , Dafne Eerkes-Medrano , Marie Johansen , David G. Johns , Margarita Machairopoulou , Sophie Pitois , James Scott , Jos Schilder , Rowena Stern , Karen Tait , Callum Whyte , Claire Widdicombe , Abigail McQuatters-Gollop
Changes in plankton have important implications for ecosystem services, including supporting fish stocks, carbon sequestration, nutrient cycling, and oxygen production. Standard long-term plankton monitoring relies on light microscopy to identify and count plankton taxa, with methods fully supported by international standards, providing high quality trusted data. Novel methods, including imaging and molecular, offer means of collecting select types of plankton data efficiently, filling targeted knowledge gaps left by standard monitoring and generating a more complete picture of plankton dynamics. Standard and novel monitoring methods present different advantages and costs, positioning their suitability to address different management needs. Standard plankton monitoring time-series are unique in providing the long-term temporal coverage, and thus statistical power, needed to detect and understand climate change impacts. When explored in parallel with standard monitoring, novel methods open doors to observing our seas from complementary perspectives, but further work is necessary before data from standard and novel methods can be integrated to address policy needs. Marine management priorities are shifting, and novel methods are increasingly proposed as possible alternatives to standard monitoring. However, for a long-term taxonomic perspective it is still essential to retain the specialist skills and maintain standard monitoring time-series to inform policy assessments of important changes in pelagic biodiversity. This review aims to inform readers of the value of long-term data, the importance of retaining taxonomic skills and embracing novel methods for marine plankton monitoring to assess pelagic biodiversity. We recommend strategies to maintain long-term monitoring whilst incorporating novel methods.
{"title":"Mind the gap - The need to integrate novel plankton methods alongside ongoing long-term monitoring","authors":"Matthew M. Holland , Luis Felipe Artigas , Angus Atkinson , Mike Best , Eileen Bresnan , Michelle Devlin , Dafne Eerkes-Medrano , Marie Johansen , David G. Johns , Margarita Machairopoulou , Sophie Pitois , James Scott , Jos Schilder , Rowena Stern , Karen Tait , Callum Whyte , Claire Widdicombe , Abigail McQuatters-Gollop","doi":"10.1016/j.ocecoaman.2025.107542","DOIUrl":"10.1016/j.ocecoaman.2025.107542","url":null,"abstract":"<div><div>Changes in plankton have important implications for ecosystem services, including supporting fish stocks, carbon sequestration, nutrient cycling, and oxygen production. Standard long-term plankton monitoring relies on light microscopy to identify and count plankton taxa, with methods fully supported by international standards, providing high quality trusted data. Novel methods, including imaging and molecular, offer means of collecting select types of plankton data efficiently, filling targeted knowledge gaps left by standard monitoring and generating a more complete picture of plankton dynamics. Standard and novel monitoring methods present different advantages and costs, positioning their suitability to address different management needs. Standard plankton monitoring time-series are unique in providing the long-term temporal coverage, and thus statistical power, needed to detect and understand climate change impacts. When explored in parallel with standard monitoring, novel methods open doors to observing our seas from complementary perspectives, but further work is necessary before data from standard and novel methods can be integrated to address policy needs. Marine management priorities are shifting, and novel methods are increasingly proposed as possible alternatives to standard monitoring. However, for a long-term taxonomic perspective it is still essential to retain the specialist skills and maintain standard monitoring time-series to inform policy assessments of important changes in pelagic biodiversity. This review aims to inform readers of the value of long-term data, the importance of retaining taxonomic skills and embracing novel methods for marine plankton monitoring to assess pelagic biodiversity. We recommend strategies to maintain long-term monitoring whilst incorporating novel methods.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"262 ","pages":"Article 107542"},"PeriodicalIF":4.8,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-28DOI: 10.1016/j.ocecoaman.2025.107553
Olivier P. Pastore , Anthony Blunden , Amy E. Peden , Jasmin C. Lawes , Robert W. Brander
Most drowning deaths on Australian beaches occur away from lifeguarding and lifesaving services, or outside of their patrol times. In response, Emergency Response Beacons (ERBs), that can be activated to alert authorities of an incident, have been installed at some coastal locations with high drowning risk. This study investigates public knowledge and understanding of these safety devices through analyses of 301 survey responses conducted with beachgoers at beaches, both with and without ERBs, in New South Wales, Australia. Less than a third (28%) of surveyed beachgoers had heard of ERBs, of which half (54%) could correctly describe what an ERB was. Beachgoers living 1–10 km from the coast were more aware of ERB presence (82%) and had learned about them by themselves (45%) or via the news (24%). Only half (50%) of surveyed beachgoers aware of ERBs knew in advance if the beach they were visiting had an ERB installed. Most surveyed beachgoers (72%), including those briefed about them after the survey, rated ERBs as being extremely useful. Survey results also revealed a potential risk for individuals with lower swimming abilities who indicated they would be more likely to enter the water if an ERB was present (80%), perceiving that emergency response and rescue times would be faster. However, results show that ERB locations vary greatly in distances and times from closest emergency services, which could impact the chance of a successful rescue and this perception of increased safety could lead to more people exposed to drowning risks and should be factored into future ERB communications. This study highlights the need for improved public education and broader community promotion of the purpose and locations of Emergency Response Beacons. In addition, the research offers significant contributions to coastal management and policy by providing actionable insights for improving emergency responses to coastal incidents. Our findings lay a foundation for enhanced public awareness and strategic response measures in NSW and potentially serve as a model for similar coastal areas.
{"title":"Evaluating public awareness and perceptions of emergency response beacons on beaches of New South Wales, Australia","authors":"Olivier P. Pastore , Anthony Blunden , Amy E. Peden , Jasmin C. Lawes , Robert W. Brander","doi":"10.1016/j.ocecoaman.2025.107553","DOIUrl":"10.1016/j.ocecoaman.2025.107553","url":null,"abstract":"<div><div>Most drowning deaths on Australian beaches occur away from lifeguarding and lifesaving services, or outside of their patrol times. In response, Emergency Response Beacons (ERBs), that can be activated to alert authorities of an incident, have been installed at some coastal locations with high drowning risk. This study investigates public knowledge and understanding of these safety devices through analyses of 301 survey responses conducted with beachgoers at beaches, both with and without ERBs, in New South Wales, Australia. Less than a third (28%) of surveyed beachgoers had heard of ERBs, of which half (54%) could correctly describe what an ERB was. Beachgoers living 1–10 km from the coast were more aware of ERB presence (82%) and had learned about them by themselves (45%) or via the news (24%). Only half (50%) of surveyed beachgoers aware of ERBs knew in advance if the beach they were visiting had an ERB installed. Most surveyed beachgoers (72%), including those briefed about them after the survey, rated ERBs as being extremely useful. Survey results also revealed a potential risk for individuals with lower swimming abilities who indicated they would be more likely to enter the water if an ERB was present (80%), perceiving that emergency response and rescue times would be faster. However, results show that ERB locations vary greatly in distances and times from closest emergency services, which could impact the chance of a successful rescue and this perception of increased safety could lead to more people exposed to drowning risks and should be factored into future ERB communications. This study highlights the need for improved public education and broader community promotion of the purpose and locations of Emergency Response Beacons. In addition, the research offers significant contributions to coastal management and policy by providing actionable insights for improving emergency responses to coastal incidents. Our findings lay a foundation for enhanced public awareness and strategic response measures in NSW and potentially serve as a model for similar coastal areas.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"262 ","pages":"Article 107553"},"PeriodicalIF":4.8,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-28DOI: 10.1016/j.ocecoaman.2025.107558
Lei Zhang , Yanbo Zhou , Yi Tang , Qiaer Wu , Shengwei Ma , Lichun Zhu , Enge Xie , Yu Wang
This study investigated the factors that influence small-scale fishers' willingness to participate in a fishery management system grounded in territorial use rights in fisheries in China. Using the stimulus-organism-response model and partial least-squares structural equation modeling, this research examined how social networks, trust, norms (components of social capital), and functional, emotional, and cognitive values (dimensions of perceived value) influence small-scale fishers' participation willingness. The study found significant positive effects of social networks, trust, and norms on fishers' willingness to participate, with path coefficients of 0.437, 0.231, and 0.201, respectively. Likewise, functional, emotional, and cognitive values positively influenced participation willingness, evidenced by path coefficients of 0.243, 0.269, and 0.254, respectively. Additionally, social networks were crucial in enhancing perceived value, especially influencing functional and cognitive values (path coefficients of 0.495 and 0.574, respectively). However, social trust's effect on functional value and social norms' influence on emotional value were not statistically significant. These findings highlight the importance of considering the comprehensive effects of social capital and perceived value in developing and applying small-scale fishery management strategies based on territorial use rights in fishing (TURF). Enhancing social networks and norms, along with elucidating the system's multifaceted values within fishing communities, can boost small-scale fishers' participation and system efficacy. This preliminary investigation identified factors affecting small-scale fishers' willingness to engage in TURF-based management in China, offering empirical support for the future development and implementation of such management systems. Future research should study the regional diversity of small-scale fisheries to identify the broader applicability of these findings and integrate economic conditions and environmental factors into analyses.
{"title":"Fisher participation in the territorial use rights of China's small-scale fisheries: Social capital and perceived value theories","authors":"Lei Zhang , Yanbo Zhou , Yi Tang , Qiaer Wu , Shengwei Ma , Lichun Zhu , Enge Xie , Yu Wang","doi":"10.1016/j.ocecoaman.2025.107558","DOIUrl":"10.1016/j.ocecoaman.2025.107558","url":null,"abstract":"<div><div>This study investigated the factors that influence small-scale fishers' willingness to participate in a fishery management system grounded in territorial use rights in fisheries in China. Using the stimulus-organism-response model and partial least-squares structural equation modeling, this research examined how social networks, trust, norms (components of social capital), and functional, emotional, and cognitive values (dimensions of perceived value) influence small-scale fishers' participation willingness. The study found significant positive effects of social networks, trust, and norms on fishers' willingness to participate, with path coefficients of 0.437, 0.231, and 0.201, respectively. Likewise, functional, emotional, and cognitive values positively influenced participation willingness, evidenced by path coefficients of 0.243, 0.269, and 0.254, respectively. Additionally, social networks were crucial in enhancing perceived value, especially influencing functional and cognitive values (path coefficients of 0.495 and 0.574, respectively). However, social trust's effect on functional value and social norms' influence on emotional value were not statistically significant. These findings highlight the importance of considering the comprehensive effects of social capital and perceived value in developing and applying small-scale fishery management strategies based on territorial use rights in fishing (TURF). Enhancing social networks and norms, along with elucidating the system's multifaceted values within fishing communities, can boost small-scale fishers' participation and system efficacy. This preliminary investigation identified factors affecting small-scale fishers' willingness to engage in TURF-based management in China, offering empirical support for the future development and implementation of such management systems. Future research should study the regional diversity of small-scale fisheries to identify the broader applicability of these findings and integrate economic conditions and environmental factors into analyses.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"262 ","pages":"Article 107558"},"PeriodicalIF":4.8,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128545","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}
Pub Date : 2025-01-27DOI: 10.1016/j.ocecoaman.2024.107538
Danial Iskandar , Che Din Mohd Safuan , Rahman Latip , Amir Husaini Saiffuddin , Hasrizal Shaari , Zainuddin Bachok , Wan Izatul Asma Wan Talaat
Marine spatial planning (MSP) has been widely implemented in marine areas to manage competing uses. However, its implementation often lacks a comprehensive incorporation of cultural heritage elements, particularly terrestrial ones. This paper examines the ecological, historical, and cultural dimensions of Pulau Bidong through a comprehensive review and discusses the suitability of marine protected areas (MPAs) and other effective area-based conservation measures (OECMs) in conserving natural and cultural heritage within the MSP framework for Bidong Archipelago. The results indicate that Pulau Bidong holds significant cultural heritage, both above land and underwater, alongside a rich diversity of terrestrial and aquatic ecosystems. The island plays a crucial role in supporting local socio-economic activities, particularly for fishermen who depend on its resources for their livelihoods. The study highlights that integrating above-land historical remnants into MSP could enhance the management of the archipelago's diverse ecology and unique cultural heritage. Furthermore, MPAs and OECMs could regulate human activities, balancing conservation and economic priorities. These findings provide insights for better MSP implementation in sites with similar cultural and ecological significance worldwide.
{"title":"Effective conservation of cultural and natural heritage of the Bidong archipelago via marine spatial planning: A review","authors":"Danial Iskandar , Che Din Mohd Safuan , Rahman Latip , Amir Husaini Saiffuddin , Hasrizal Shaari , Zainuddin Bachok , Wan Izatul Asma Wan Talaat","doi":"10.1016/j.ocecoaman.2024.107538","DOIUrl":"10.1016/j.ocecoaman.2024.107538","url":null,"abstract":"<div><div>Marine spatial planning (MSP) has been widely implemented in marine areas to manage competing uses. However, its implementation often lacks a comprehensive incorporation of cultural heritage elements, particularly terrestrial ones. This paper examines the ecological, historical, and cultural dimensions of Pulau Bidong through a comprehensive review and discusses the suitability of marine protected areas (MPAs) and other effective area-based conservation measures (OECMs) in conserving natural and cultural heritage within the MSP framework for Bidong Archipelago. The results indicate that Pulau Bidong holds significant cultural heritage, both above land and underwater, alongside a rich diversity of terrestrial and aquatic ecosystems. The island plays a crucial role in supporting local socio-economic activities, particularly for fishermen who depend on its resources for their livelihoods. The study highlights that integrating above-land historical remnants into MSP could enhance the management of the archipelago's diverse ecology and unique cultural heritage. Furthermore, MPAs and OECMs could regulate human activities, balancing conservation and economic priorities. These findings provide insights for better MSP implementation in sites with similar cultural and ecological significance worldwide.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"262 ","pages":"Article 107538"},"PeriodicalIF":4.8,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101456","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}
Pub Date : 2025-01-27DOI: 10.1016/j.ocecoaman.2025.107549
Yui-yip Lau , Zhisen Yang , Jingbo Yin , Zhimei Lei , Mark Ching-Pong Poo
Vessel emission is gradually becoming one of the major sources of environmental pollution in Asian areas such as the Greater Bay Area (GBA) and Southeast Asia (SEA). Accurate identification of vessels with high pollution risks can effectively control their emissions. This research develops data-driven Bayesian network models to assess vessel pollution risk in GBA and SEA regions through a novel machine-learning methodology. A comprehensive analysis based on the newly proposed ‘pollution risk index’ reveals the key variables affecting vessel pollution risk, as well as similarities and differences between two regions. Furthermore, managerial implications are provided to help different coastal authorities better control the vessel pollution, i.e., the pre-assessment of vessel risk before onboard inspections, the formulation of specific regulations targeting on vessels with high pollution risks. This research provides a good reference for assessing vessel pollution risks, controlling vessel emissions and ensuring environmentally-friendly navigational waters in GBA and SEA areas.
{"title":"Assessing vessel pollution risk in Asian areas: A comparative analysis based on data-driven Bayesian Network approach","authors":"Yui-yip Lau , Zhisen Yang , Jingbo Yin , Zhimei Lei , Mark Ching-Pong Poo","doi":"10.1016/j.ocecoaman.2025.107549","DOIUrl":"10.1016/j.ocecoaman.2025.107549","url":null,"abstract":"<div><div>Vessel emission is gradually becoming one of the major sources of environmental pollution in Asian areas such as the Greater Bay Area (GBA) and Southeast Asia (SEA). Accurate identification of vessels with high pollution risks can effectively control their emissions. This research develops data-driven Bayesian network models to assess vessel pollution risk in GBA and SEA regions through a novel machine-learning methodology. A comprehensive analysis based on the newly proposed ‘pollution risk index’ reveals the key variables affecting vessel pollution risk, as well as similarities and differences between two regions. Furthermore, managerial implications are provided to help different coastal authorities better control the vessel pollution, i.e., the pre-assessment of vessel risk before onboard inspections, the formulation of specific regulations targeting on vessels with high pollution risks. This research provides a good reference for assessing vessel pollution risks, controlling vessel emissions and ensuring environmentally-friendly navigational waters in GBA and SEA areas.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"262 ","pages":"Article 107549"},"PeriodicalIF":4.8,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105271","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}
Pub Date : 2025-01-24DOI: 10.1016/j.ocecoaman.2025.107550
R.S.K. Barnes , J.L. Seath
Successful management relies on accurate information on local environmental health. A typical macrofaunal assemblage-composition index, the BO2A (Benthic Opportunist Annelids Amphipods) considered to quantify benthic estuarine quality particularly well, was measured throughout the Knysna estuarine system (the one with the highest South African biodiversity and conservation rating, and considered 'largely natural with few modifications'), including in a blind-ending small-boat harbour. All index levels were represented across its intertidal and subtidal areas of bare sediment and seagrass beds, from <0.001 (='high' quality) to 0.240 (='poor' quality). Overall, BO2A did indeed suggest 'good' ecological quality. Nevertheless, only 25% of individual sites displayed 'high' quality; most were rated at the lower levels normally taken to indicate some degree of environmental degradation. The abundance of opportunistic annelids, which averaged 1153 m−2 (16% of total macrofaunal numbers), did not vary along its longitudinal axis, and neither did the index. BO2A proved directly related to log[p/(1-p)] where p = proportion of just the opportunistic annelids. As in other equivalent marinas, these annelids also dominated the small-boat harbour, and this showed some evidence of faunal impoverishment relative to adjacent backwaters but its benthos displayed little relationship with the degree of faunal confinement. The record of a spadellid chaetognath from the harbour access channel appears to be the first from Africa. As predicted by the Estuarine Quality Paradox, being based on the questionable assumption that the presence of certain animals considered to be opportunistic indicates unnatural, degraded conditions, macrofaunal composition indices do not contribute unambiguous data to the environmental assessment of brackish-water habitats.
{"title":"The meaning of Benthic Ecological Quality status through a warm temperate South African estuary and in a contained blind-ending marina","authors":"R.S.K. Barnes , J.L. Seath","doi":"10.1016/j.ocecoaman.2025.107550","DOIUrl":"10.1016/j.ocecoaman.2025.107550","url":null,"abstract":"<div><div>Successful management relies on accurate information on local environmental health. A typical macrofaunal assemblage-composition index, the BO2A (Benthic Opportunist Annelids Amphipods) considered to quantify benthic estuarine quality particularly well, was measured throughout the Knysna estuarine system (the one with the highest South African biodiversity and conservation rating, and considered 'largely natural with few modifications'), including in a blind-ending small-boat harbour. All index levels were represented across its intertidal and subtidal areas of bare sediment and seagrass beds, from <0.001 (='high' quality) to 0.240 (='poor' quality). Overall, BO2A did indeed suggest 'good' ecological quality. Nevertheless, only 25% of individual sites displayed 'high' quality; most were rated at the lower levels normally taken to indicate some degree of environmental degradation. The abundance of opportunistic annelids, which averaged 1153 m<sup>−2</sup> (16% of total macrofaunal numbers), did not vary along its longitudinal axis, and neither did the index. BO2A proved directly related to log[<em>p</em>/(1-<em>p</em>)] where <em>p</em> = proportion of just the opportunistic annelids. As in other equivalent marinas, these annelids also dominated the small-boat harbour, and this showed some evidence of faunal impoverishment relative to adjacent backwaters but its benthos displayed little relationship with the degree of faunal confinement. The record of a spadellid chaetognath from the harbour access channel appears to be the first from Africa. As predicted by the Estuarine Quality Paradox, being based on the questionable assumption that the presence of certain animals considered to be opportunistic indicates unnatural, degraded conditions, macrofaunal composition indices do not contribute unambiguous data to the environmental assessment of brackish-water habitats.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"262 ","pages":"Article 107550"},"PeriodicalIF":4.8,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-30DOI: 10.1016/j.ocecoaman.2024.107505
Guiyang Ling , Chuanfeng Han , Zhensheng Yang , Junliang He
The increasingly stringent international environmental protection requirements and the progressively tougher compliance requirements of shipowners have also put forward new development needs for low-emission, clean-energy vessels. At present, more than 90% of China's water transport ships still use diesel-powered propulsion systems, which have issues such as high fuel costs, high noise levels, and pollution emissions. Compared with traditional ship power systems, the ecological advantages and comprehensive benefits of electric propulsion-type ships are obvious. However, there are also issues, such as shorter range and battery life, which need to be analyzed in depth. This paper establishes a life cycle energy consumption model and emission model for the comprehensive benefits of electric ships and conducts an economic benefit analysis. The results show that electric ships have significant advantages in environmental protection, energy saving and lower costs while electric ships for containers have great prospects for future development. This paper provides a useful exploration for the international shipping industry to adopt effective measures to control ship emissions.
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Pub Date : 2024-11-30DOI: 10.1016/j.ocecoaman.2024.107492
Zhengliang Xiang , Xu Xin , Tao Zhang , Kang Chen , Miaohui Liu
The recent improvement in navigational conditions along the Northern Sea Route (NSR) has attracted the attention of academia and industrial circles. For liner companies, the NSR offers a considerably shorter voyage distance than the Suez Canal Route does, making it a viable option to increase their profits. However, the overexploitation and utilization of the NSR may produce large amounts of black carbon, thus damaging the Arctic ecosystem. In light of the aforementioned background, we examine the challenges in designing liner shipping networks while considering the navigability and transit cost of the NSR and the environmental costs (i.e., black carbon pollution taxes) associated with black carbon. To this end, we establish a bi-level optimization model. Specifically, the upper-level model selects a network design scheme that maximizes the liner company's profit, whereas the lower-level model optimizes the slot allocation scheme to evaluate the derived network design scheme from the upper-level model. To solve this bi-level model, we develop a meta-heuristic algorithm embedded with a linear programming model and perform numerical experiments via a practical Asia‒Europe shipping route. Sensitivity analyses are conducted under various navigational conditions and black carbon taxes. The findings demonstrate that the proposed model and algorithm can effectively address the network design problem, offering practical managerial insights for the liner company's daily operations and the policy formulation of green sustainable transportation policies by governments of countries along the NSR. This paper provides a valuable contribution to advancing green shipping practices in the Arctic region.
{"title":"Asia‒Europe liner shipping network design model considering Arctic route and black carbon tax","authors":"Zhengliang Xiang , Xu Xin , Tao Zhang , Kang Chen , Miaohui Liu","doi":"10.1016/j.ocecoaman.2024.107492","DOIUrl":"10.1016/j.ocecoaman.2024.107492","url":null,"abstract":"<div><div>The recent improvement in navigational conditions along the Northern Sea Route (NSR) has attracted the attention of academia and industrial circles. For liner companies, the NSR offers a considerably shorter voyage distance than the Suez Canal Route does, making it a viable option to increase their profits. However, the overexploitation and utilization of the NSR may produce large amounts of black carbon, thus damaging the Arctic ecosystem. In light of the aforementioned background, we examine the challenges in designing liner shipping networks while considering the navigability and transit cost of the NSR and the environmental costs (i.e., black carbon pollution taxes) associated with black carbon. To this end, we establish a bi-level optimization model. Specifically, the upper-level model selects a network design scheme that maximizes the liner company's profit, whereas the lower-level model optimizes the slot allocation scheme to evaluate the derived network design scheme from the upper-level model. To solve this bi-level model, we develop a meta-heuristic algorithm embedded with a linear programming model and perform numerical experiments via a practical Asia‒Europe shipping route. Sensitivity analyses are conducted under various navigational conditions and black carbon taxes. The findings demonstrate that the proposed model and algorithm can effectively address the network design problem, offering practical managerial insights for the liner company's daily operations and the policy formulation of green sustainable transportation policies by governments of countries along the NSR. This paper provides a valuable contribution to advancing green shipping practices in the Arctic region.</div></div>","PeriodicalId":54698,"journal":{"name":"Ocean & Coastal Management","volume":"261 ","pages":"Article 107492"},"PeriodicalIF":4.8,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748757","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}
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