Frontiers in Marine Science最新文献

{"title":"Quantifying coral-algal interactions in an acidified ocean: Sargassum spp. exposure mitigates low pH effects on Acropora cervicornis health","authors":"Johann D. Lankes, Heather N. Page, Amanda Quasunella, Jaclyn F. Torkelson, Clöe Lemaire, Robert J. Nowicki, Lillia Blasius, Emily R. Hall","doi":"10.3389/fmars.2025.1487102","DOIUrl":"https://doi.org/10.3389/fmars.2025.1487102","url":null,"abstract":"Increasingly frequent large-scale pelagic <jats:italic>Sargassum</jats:italic> algae blooms in the Atlantic have become a problem for coastal ecosystems. The mass decay of these blooms reduces water quality for coastal flora and fauna. However, the effects of living <jats:italic>Sargassum</jats:italic> blooms on seawater quality and consequently coral reef ecosystems that rely on delicately balanced carbonate chemistry are more ambiguous. Future oceans are predicted to be more acidic as additional anthropogenic CO<jats:sub>2</jats:sub> emissions are absorbed, potentially tipping the balance in favor of algal blooms at the cost of coral survival. This study aimed to simulate the indirect interaction between pelagic S<jats:italic>argassum</jats:italic> spp. and <jats:italic>Acropora cervicornis</jats:italic> coral fragments from the Florida Reef in current-day and future ocean pH conditions over the course of 70 days in a mesocosm experimental system. Measurements of coral growth and health via buoyant weight and Pulse Amplitude Modulated (PAM) fluorescence measurements reveal an unexpected coral-algal interaction. After 1 month, coral growth was significantly reduced under ocean acidification conditions and exposure to S<jats:italic>argassum</jats:italic>; at the same time quantum yield and maximum electron transport rate of photosynthesis were increased relative to control counterparts in ambient and future pH scenarios by up to 14% and 18% respectively. These improvements in photosynthetic efficiency did not translate to significant differences in growth by the final measurement time point. In addition, the presence of <jats:italic>Sargassum</jats:italic> spp. did not raise seawater pH in the system, raising questions about how it benefited photosynthetic efficiency in exposed corals. Heterotrophy of detrital algal matter is suspected to compensate for impaired photosynthesis of pH stressed corals. Therefore, despite their current negative reputation, <jats:italic>Sargassum</jats:italic> blooms could provide short term localized benefits to corals in present and future ocean conditions.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"4 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-cell transcriptome sequencing reveals the cell populations and functions associated with stony coral Pocillopora damicornis","authors":"Wenguang Diao, Shengyao Zhang, Xueying Zhu, Peiqi Wu, Bingyan Du, Zhe Han, Yunqing Liu, Chunpeng He, Zuhong Lu","doi":"10.3389/fmars.2025.1551763","DOIUrl":"https://doi.org/10.3389/fmars.2025.1551763","url":null,"abstract":"Introduction<jats:italic>Pocillopora damicornis</jats:italic>, a key species of stony corals, has been the subject of considerable scientific study. However, the cellular composition of <jats:italic>P. damicornis</jats:italic> and the roles of these cells in endosymbiosis and biomineralization remain elusive. The development of single-cell technology has provided new opportunities for researching the cellular and molecular mechanisms underlying symbiosis and mineralization. Nevertheless, the stringent environmental requirements, the complexity of the cellular components, and the paucity of high-quality reference genomes of <jats:italic>P. damicornis</jats:italic> have posed significant challenges for single-cell transcriptome research.MethodsIn this study, we quantified the transcriptomic expression of <jats:italic>P. damicornis</jats:italic> by aligning its single-cell transcriptome (scRNA-seq) data to multiple species, including <jats:italic>Stylophora pistillata</jats:italic>, <jats:italic>P. damicornis</jats:italic>, and <jats:italic>Pocillopora verrucosa</jats:italic>. We determined the cell types of <jats:italic>P. damicornis</jats:italic> by comparing its cluster-specific genes with the published cell type-specific genes of <jats:italic>S.pistillata</jats:italic> and conducted gene function and enrichment analyses.ResultsUnsupervised clustering analysis yielded the identification of ten distinct cell populations, including epidermis cells, gastrodermis cells, algae-hosting cells, calicoblast, cnidocytes, and immune cells. In addition, we identified 53 genes that were highly similar to known sequences in the symbiotic zooxanthellae. These genes were mainly expressed in four different cell populations, corresponding to active symbiotic populations.ConclusionThis study identified cell types closely associated with symbiosis and calcification in <jats:italic>P. damicornis</jats:italic>, along with their marker genes, which are consistent with the findings in <jats:italic>S. pistillata</jats:italic>. These results offer insights into the cellular functions and symbiotic mechanisms of <jats:italic>P. damicornis</jats:italic>.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"22 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of the on-site fish workshop in gaining children’s understanding and support for coastal zone management: leverage points and human-nature connection perspectives","authors":"Takuro Uehara, Sawako Tachibana, Takeshi Hidaka","doi":"10.3389/fmars.2025.1415118","DOIUrl":"https://doi.org/10.3389/fmars.2025.1415118","url":null,"abstract":"Public understanding and support are essential for managing coastal zones because these are social-ecological systems (SES) in which the public plays a crucial role. As disconnection from nature may be a root cause of the unsustainability of SES, reconnecting people to nature is a promising avenue for improving their understanding and support. Although environmental education that involves exposure to nature has been considered influential in reconnecting people with nature, empirical research is lacking. Therefore, this study aimed to assess the impact of an on-site fish workshop on Japanese elementary and junior high school student’s knowledge, attitudes, intentions, and behaviors through the notion of human-nature connection (HNC) and leverage points. A 2×2 difference-in-differences design was employed in which the workshop’s impact was assessed by comparing the treatment and control groups before and after the workshop. We collected 4,054 responses, with 1,243 (pre-) and 1,088 (post-) students in the treatment group and 857 (pre-) and 866 (post-) in the control group. The preliminary findings indicate that the workshop had diverse impacts, from shallow (parameters) to deep leverage points (Information flows, Rules, Goals, and Paradigms), including HNC, support for ongoing management measures, and pro-SES attitudes and intentions. Their diverse impacts in the same direction (i.e., improvements), as found in our study, are critical because leverage points should be aligned for systemic sustainability transformation. However, changes to leverage points measured in the average treatment effect on the treated (ATET) varied from limited to extensive. Future research directions are discussed based on the preliminary findings.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"34 11 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soil bacterial community composition but not alpha diversity altered along a gradient of Spartina alterniflora invasion on the coast of Yellow Sea, China","authors":"Li Yang, Yue Peng, Shuang Wang, Chenxuan Rong, Huice Dong, Hongshan Li, Baoming Ge","doi":"10.3389/fmars.2025.1531902","DOIUrl":"https://doi.org/10.3389/fmars.2025.1531902","url":null,"abstract":"Introduction<jats:italic>Spartina alterniflora</jats:italic> invasion may alter the characteristics and functions of the coastal wetland ecosystems. Previous studies have shown that invasion changes the biogeochemical processes and microbial diversity in marsh ecosystems; however, knowledge of the changes in bacterial communities and their function at different soil depths during invasion remains limited.MethodsIn the present study, we investigated <jats:italic>S. alterniflora</jats:italic> invasion on the dynamic changes of soil bacterial communities using Illumina MiSeq sequencing analyses of 16S rRNA at different soil depths (i.e., 0–10, 10–20, and 20–40 cm) during the invasive process (i.e., 1, 4, 7, and 12 years), as well as the potential correlations between soil physicochemical characteristics and enzyme activities.ResultsThe invasion of <jats:italic>S. alterniflora</jats:italic> did not significantly affect soil bacterial alpha diversity or the functional profiles at the first and second levels of the Kyoto Encyclopedia of Genes and Genomes (KEGG). Furthermore, no significant changes were observed across different soil depths. However, the relative abundances of Chloroplast and Alphaproteobacteria increased from 3.03% and 5.05% in bare mudflat to 13.61% and 8.95% in the 12-year-old <jats:italic>S. alterniflora</jats:italic> invaded soil, respectively, whereas those of Deltaproteobacteria, Acidimicrobiia, and Bacilli decreased after <jats:italic>S. alterniflora</jats:italic> invasion for approximately 12 years. The relative abundances of soil bacteria varied with soil depth. Total phosphorus, carbon-to-nitrogen ratio, total carbon, and catalase activity were the key factors affecting soil bacterial community composition.DiscussionThe soil physicochemical characteristics changes caused by invasion may temporarily enhance soil fertility, they can lead to long-term wetland degradation through changed biological community and altered nutrient dynamics. This study provides a comprehensive understanding of the dynamic changes in bacterial communities, soil physicochemical characteristics, and enzyme activities during <jats:italic>S. alterniflora</jats:italic> invasion on coastal wetlands.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"90 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of tusks by narwhals, Monodon monoceros, in foraging, exploratory, and play behavior","authors":"Greg O’Corry-Crowe, Maha Ghazal, Mark Gillespie, Paul Galvin, Jason Harasimo, Luke Storrie, Cortney A. Watt","doi":"10.3389/fmars.2025.1518605","DOIUrl":"https://doi.org/10.3389/fmars.2025.1518605","url":null,"abstract":"Despite the universal fascination with the tusk of the narwhal, the function of this long, spiraled tooth is still debated, primarily because few people have observed how narwhals (<jats:italic>Monodon monoceros</jats:italic>) use their tusks in the wild. Using an unmanned aerial vehicle (UAV), we recorded previously unreported interactions between multiple narwhals, Arctic char (<jats:italic>Salvelinus alpinus</jats:italic>) and glaucous gulls (<jats:italic>Larus hyperboreus</jats:italic>) in Canada’s High Arctic. Narwhals were recorded chasing char and using their tusks to hit, manipulate and influence the behavior of fish. Differences in tusk use likely reflected differences in behavioral intent with some actions associated with prey capture and others with exploration and likely play. Kleptoparasitic behavior by gulls when narwhals pursued char near the surface substantially reduced prey capture for narwhals. Associative and interactive behaviors among narwhals were linked to the ecological context including fish density and gull behavior. Some interactions appeared competitive in nature while others may have been communicative and affiliative. This study revealed that narwhals can use their tusks to investigate and manipulate objects, including prey, and deliver sufficient force with their tusks to stun and possibly kill fish. The speed and agility of char combined with kleptoparasitic behavior of gulls indicate that char may be a challenging species to predate while aspects of the narwhals’ actions may include social learning and exploration of a novel prey species, and are the first reported evidence of likely play, specifically exploratory-object play, in narwhals.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"4 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on fishing vessel recognition based on vessel behavior characteristics from AIS data","authors":"Xiao Han, Yang Zhou, Jianjun Weng, Lijia Chen, Kang Liu","doi":"10.3389/fmars.2025.1547658","DOIUrl":"https://doi.org/10.3389/fmars.2025.1547658","url":null,"abstract":"The Automatic Identification System (AIS) is one of the most important navigation assistance systems and plays a pivotal role in vessel monitoring. However, some fishing vessels disguise themselves as other vessel types during fishing bans to engage in illegal fishing activities, causing significant damage to marine ecosystem. To address this challenge and accurately identify vessel types, a BP-AdaBoost classification algorithm is developed by integrating backpropagation (BP) neural networks with ensemble learning techniques. The proposed algorithm leverages the AdaBoost method to combine multiple BP neural network weak classifiers into a strong classifier, effectively mitigating the slow convergence rate and susceptibility to local optima inherent in BP neural networks. By configuring the output nodes of the BP neural network to match the number of target classes, the AdaBoost algorithm achieves robust multi-class classification functionality. Historical AIS data are analyzed to extract static features, vessel behavior features, and temporal features for vessel classification. To minimize model overfitting, the Maximal Information Coefficient algorithm is employed to assess feature importance, and optimal feature combinations are determined through systematic feature selection experiments. Experiments are conducted using AIS data from the Pearl River Estuary in China, targeting the classification of cargo ships, fishing vessel, tanker, and passenger ships. The performance of the proposed method is compared with other machine learning algorithms. The results demonstrated classification accuracies of 90.8% for cargo ships, 95.6% for fishing vessels, 97.5% for tankers, and 98% for passenger ships, with an overall classification accuracy of 95%. Additionally, the BP-AdaBoost algorithm exhibited superior performance across other classification evaluation metrics. Specifically, the proposed algorithm outperformed the BP neural network by 4.5% and the support vector machine by 12.6% in overall classification accuracy. These findings indicate that the BP-AdaBoost algorithm is capable of effectively identifying vessel types based on historical trajectory data, providing a solid foundation for combating illegal fishing, detecting abnormal vessels, and identifying irregular vessel behaviors.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"33 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diazotroph-derived nitrogen release and transfer under varying light intensity: insights from co-culture studies","authors":"Xiaohua Hu, Zuozhu Wen, Tingwei Luo, Haizheng Hong","doi":"10.3389/fmars.2025.1485853","DOIUrl":"https://doi.org/10.3389/fmars.2025.1485853","url":null,"abstract":"Biological dinitrogen (N<jats:sub>2</jats:sub>) fixation is a major source of new N to surface seawater, sustaining ocean productivity. However, the fate of diazotroph-derived nitrogen (DDN), specifically its release and transfer, and the factors controlling these processes, remain poorly understood. Here, we established stable co-cultures of the major diazotrophs, filamentous <jats:italic>Trichodesmium erythraeum</jats:italic> IMS101 and unicellular <jats:italic>Crocosphaera watsonii</jats:italic> WH8501, with the pico-cyanobacterium <jats:italic>Synechococcus</jats:italic> sp. WH8102, to explore the intrinsic differences in DDN release and transfer between diazotroph strains. We found that <jats:italic>T. erythraeum</jats:italic> released similar amounts of DDN as <jats:italic>C. watsonii</jats:italic>, but had a significantly higher DDN transfer efficiency for supporting <jats:italic>Synechococcus</jats:italic> cell growth. These results implied a higher bioavailability of fixed N released by <jats:italic>T. erythraeum</jats:italic> than by <jats:italic>C. watsonii</jats:italic>. Additionally, we showed that elevated light levels significantly enhanced <jats:italic>T. erythraeum</jats:italic> DDN release and transfer. Our results provide new insights into the fate of N fixed by different diazotrophs and the environmental factors that control the process.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"210 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate-induced habitat suitability modelling for pelagic fish in European seas","authors":"Rutendo Musimwa, Ward Standaert, Martha Stevens, Salvador Jesus Fernández Bejarano, Carlota Muñiz, Elisabeth Debusschere, Steven Pint, Gert Everaert","doi":"10.3389/fmars.2025.1501751","DOIUrl":"https://doi.org/10.3389/fmars.2025.1501751","url":null,"abstract":"Pelagic fish species, including <jats:italic>Clupea harengus</jats:italic> (Atlantic herring), <jats:italic>Scomber scombrus</jats:italic> (Atlantic mackerel) and <jats:italic>Dicentrarchus labrax</jats:italic> (European seabass), are integral to the ecological stability of European marine ecosystems. This study employs a mechanistic niche modelling approach to predict the distribution of these key pelagic species in European seas and to assess the impact of predicted changes in climate conditions on their suitable habitat range. By using fuzzy logic principles and mathematical descriptions of species’ niches, we analysed responses to changing temperature and salinity using climate prediction data from six Shared Socioeconomic Pathways (SSP) scenarios, predicting habitat suitability from the present (2010-2019) until 2100. Under the worst-case temperature climate scenario, all three species exhibited a consistent northward shift of suitable habitats by 2100. Specifically, the suitable habitat for <jats:italic>C. harengus, S. scombrus and D. labrax</jats:italic> is projected to shift approximately 638 km, 799 km and 13 km north, respectively. The independent contributions of temperature and salinity indicate a distinction in habitat suitability between northern European waters and the Mediterranean Sea, with higher suitability scores in the north. For example, by 2100, the habitat suitability index for non-spawning Atlantic herring in the North Atlantic Ocean is projected to be 0.63 ± 0.3 under SSP5-8.5 compared to the current habitat suitability index of 0.49 ± 0.36, while the index is projected to 0.02 ± 0.003 in the Mediterranean Sea-Western Basin with the current index at 0.01 ± 0.03. These findings suggest that northern latitudes, encompassing regions such as the North Sea and the Baltic Sea currently offer more favorable conditions compared to the lower latitudes of the Mediterranean region. The study’s findings should guide policy decisions in environmental and marine resource management, ensuring interventions are based on up-to-date information and account for anticipated climate change impacts.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"28 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Routine large-scale movements of the yelloweye rockfish (Sebastes ruberrimus)","authors":"Leif K. Rasmuson, Matthew T. O. Blume, Kelly A. Lawrence, Bruce M. Laughlin, Christopher A. Edwards, Mark R. Terwilliger, A. Camille Ayrea, Alexandra G. McInturf, Bryan J. Legare, Taylor K. Chapple","doi":"10.3389/fmars.2025.1539206","DOIUrl":"https://doi.org/10.3389/fmars.2025.1539206","url":null,"abstract":"Of the seven species of Pacific rockfish declared overfished in the California Current in 2008, yelloweye rockfish (<jats:italic>Sebastes ruberrimus</jats:italic>) is the only remaining overfished rockfish species. Part of the original rebuilding plan included designation of a yelloweye rockfish conservation area, a rocky reef closed off the Central Coast of Oregon that is closed to bottom fishing. The yelloweye rockfish conservation area’s ability to help rebuild the population, is predicated on the theory that demersal rockfishes are relatively sedentary. However, in the years since being declared overfished, acoustic tagging studies suggested yelloweye rockfish did not remain in the yelloweye rockfish conservation area. However, where they went remained a mystery. In this paper we describe the use of pop-off satellite tags to conduct a mark-recapture study of 11 yelloweye rockfish tagged within the Stonewall Bank Yelloweye Rockfish Conservation Area. We used back-in-time particle tracking coupled with an ocean circulation model in an attempt to increase the precision in the location at which each tag shed off the fish, and further validated that location by associating it to the underlying seafloor habitat type. Ten out of eleven tags were shed from the fish while it was outside the Stonewall Bank Yelloweye Rockfish Conservation Area’s boundary. While most fish remained within 50 km of the Stonewall Bank Yelloweye Rockfish Conservation Area, one tagged fish swam to an offshore reef off Central Washington (~40 km from the shore). Backtracked locations were more likely over rock than the initial satellite transmission, indicating the method was effective at identifying tag shed locations. We found no relationship between days at large, fish sex or length and the distance between release site and shed location. Our work supports a growing body of work that suggests yelloweye rockfish have less site fidelity than previously hypothesized.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"36 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Collision avoidance method for unmanned ships using a modified APF algorithm","authors":"Lianbo Li, Wenhao Wu, Zhengqian Li, Fangjie Wang","doi":"10.3389/fmars.2025.1550529","DOIUrl":"https://doi.org/10.3389/fmars.2025.1550529","url":null,"abstract":"The Artificial Potential Field (APF) algorithm has been widely used for collision avoidance on unmanned ships. However, traditional APF methods have several defects that need to be addressed. To ensure safe navigation with good seamanship and full compliance with the Convention on the International Regulations for Preventing Collisions at Sea, 1972 (COLREGS), this study proposes a dynamic collision avoidance method based on the APF algorithm. The proposed method incorporates a ship domain priority judgment encounter situation, allowing the algorithm to perform collision avoidance operations in accordance with actual operational requirements. To address path interference and unreachable target issues, a new attractive potential field function is introduced, dividing the attractive potential field of the target point into multiple segments simultaneously. Additionally, the repulsive force on the own ship is reduced when close to the target point. The results show that the proposed method effectively resolves path oscillation problems by integrating the potential field based on traditional APF with partial ideas from the Dynamic Window Approach (DWA). In comparison with traditional APF algorithms, the overall smoothing degree was improved by 71.8%, verifying the effectiveness and superiority of the proposed algorithm.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"66 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}