Marine environmental research最新文献

{"title":"Impact of river discharge and suspended sediments on phytoplankton in the nearshore waters of the Indian southwest coast.","authors":"S Santhi Krishnan, R Jyothibabu, K J Albin, K T Alok, C Karnan, R Sajeev, S Pratik","doi":"10.1016/j.marenvres.2025.107421","DOIUrl":"10.1016/j.marenvres.2025.107421","url":null,"abstract":"<p><p>The current study presents how seasonal and spatial variations in river discharge and suspended sediments alter selected phytoplankton variables in the nearshore waters along the southwest coast of India. The study utilised satellite remote sensing and in-situ hydrography, complemented with rainfall, river discharge, and suspended sediment data sets. The nearshore waters of the Southeastern Arabian Sea (SEAS) and the adjacent Indian (Kerala) landmass were the primary focus of this research. The study region receives 2649 mm of annual rainfall, with over 70 % of that falling during the Southwest Monsoon [SWM (June-September)]. 41 short rivers from the western Ghats drain the rainfall into the SEAS. Three zones have been examined here: the Northern Region (NR) between 11 and 12.5°N with 24 rivers, the Central Region (CR) between 9 and 11°N with nine rivers, and the Southern Region (SR) between 7 and 9°N with 12 rivers. Despite high PAR levels in the study area during the Pre-Monsoon [PRM (March-May)] and the Northeast Monsoon [NEM (November-February)], nutrient concentrations were too low, resulting in lower chlorophyll a (<0.5 mg m^-3). This setting changed during the SWM when huge river discharge and coastal upwelling resulted in elevated nutrients. Upwelling was strong in the SR, while the higher river discharge and stratification weakened upwelling in the NR and CR. Overall, the NR and CR had higher suspended sediments from river discharge during the SWM, which resulted in a decrease in the euphotic column. As a result, the SR had the highest euphotic column (28 m), followed by the CR (20 m) and the NR (15 m). A much thinner chlorophyll maxima layer was found in the surface waters of the CR (av. 13 m) and NR (av. 15 m) than in SR (av. 25 m). This in turn caused higher euphotic column integrated chlorophyll in the SR (av. 77.9 ± 13.3 mg m^-2) compared to the NR (av. 42.9 ± 12.4 mg m^-2) and the CR (av. 30.63 ± 9.6 mg m^-2). FlowCAM-based analyses showed more abundance of needle-shaped microphytoplankton cells in the SR and the spherical ones in the CR and NR during the SWM. The study concluded that spatial changes in river discharge and suspended sediments in the current study area during the SWM can have an impact on the chlorophyll maximum layer and phytoplankton composition of surface waters.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107421"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144812210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Mechanical properties and elemental composition of the beak in selected cephalopod species: patterns and variability.","authors":"Anastasiia Maliuk, Dominik Dziedzic, Arsalan Marghoub, Isabelle Rouget, Anthony Herrel, Susan Evans, Mehran Moazen, Louise Souquet","doi":"10.1016/j.marenvres.2025.107472","DOIUrl":"10.1016/j.marenvres.2025.107472","url":null,"abstract":"<p><p>Cephalopod beaks are remarkable organic structures that play a crucial role in the feeding ecology of these marine molluscs. This study investigates the mechanical properties, microstructure, and elemental composition of beaks from four commercially available cephalopod species: Eledone cirrhosa, Sepia officinalis, Loligo vulgaris, and Sepioteuthis lessoniana. Using nanoindentation, we measured the elastic modulus of the rostrum, revealing that lower beaks are stiffer than upper beaks across all species. Notably, L. vulgaris exhibited the highest stiffness. The study highlights significant intra- and interspecific variability in beak properties, suggesting ecological implications regarding diet and environmental factors. Scanning electron microscopy (SEM) showed a fibrous microstructure with nanoparticles of different sizes, while energy dispersive spectroscopy (EDS) identified carbon, oxygen, and nitrogen as primary elements, along with trace elements like silicon and calcium. These initial results suggest that the relationships between beak structure, composition, and biomechanical properties are likely to be complex and species-specific, underscoring the need for more comprehensive analyses to better understand beak function and its adaptive implications. This research provides new baseline data for comparative studies on cephalopod functional morphology and raises the potential of beaks as tools for ecological and environmental monitoring. We recommend that future studies incorporate larger and developmentally diverse samples to refine our understanding of cephalopod feeding adaptations and their interaction with changing marine environments.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107472"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144959164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Context-dependent growth response of Halimeda opuntia to sediment and nutrients in a high light environment.","authors":"Shalanda R Grier, Symone A Gyles, Joanna Marrufo, Shayna A Sura, Paul H Barber, Peggy Fong","doi":"10.1016/j.marenvres.2025.107465","DOIUrl":"10.1016/j.marenvres.2025.107465","url":null,"abstract":"<p><p>Coral reefs often experience simultaneous changes in multiple environmental drivers due to human impacts that can affect species' responses and ultimately alter community structure. Presently, the bulk of coral reef research is focused on the responses of coral, fish, and opportunistic algae to multiple stressors. Lacking are experiments investigating macroalgae typically associated with healthy reef systems. Here we explore how nutrients, sediment, and light affect a persistent macroalgal species using both field and mesocosm experiments. In the field, we quantified the response of Halimeda opuntia, a common calcifying alga on both less and more impacted reefs, to nutrients, sediment, and light. We found sediment and nutrient additions, conditions characteristic of more impacted reefs, interacted negatively to decrease H. opuntia growth. In a mesocosm experiment, we quantified the effects of sediment and light on H. opuntia growth and found in this extremely high light environment both sediment addition and light reduction positively affected H. opuntia. Our results demonstrate that the response of H. opuntia to these environmental drivers is context dependent. While the combination of nutrients and sediment may deter the growth of persistent macroalgal species, increased sediment alone may mediate the inhibitory effects of an extremely high light environment. These results suggest that macroalgal species that are typically associated with healthy coral reefs may suffer rather than benefit from shifts in environmental drivers impacted by anthropogenic factors.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"211 ","pages":"107465"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144959605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Crude vs. condensate: Contrasting pollution trajectories and management implications from two major oil spills in China's marine ecosystems.","authors":"Chuanyuan Wang, Ping Guo, Jianhui Tang, Haijiang Zhang","doi":"10.1016/j.marenvres.2025.107594","DOIUrl":"https://doi.org/10.1016/j.marenvres.2025.107594","url":null,"abstract":"<p><p>Oil spills increasingly imperil China's marine ecosystems, with the Sanchi (condensate oil) and Dalian (crude oil) incidents exhibiting distinct pollution dynamics. This study integrates spatial analysis, chemometric source apportionment (HCA-PCA), and ecological risk assessment to compare polycyclic aromatic hydrocarbons (PAHs) contamination in surface sediments. Results reveal Dalian's PAHs cluster in industrial zones, likely from historical combustion sources, while Sanchi shows radial declines from the wreck, reflecting condensate oil volatilization. Source analysis identifies uniform combustion origins for Dalian and mixed inputs from heavy fuel oil weathering and combustion for Sanchi. Despite overall PAHs levels below ER-L thresholds, Sanchi's heavy fuel oil-derived 5-6 ring PAHs require continuous monitoring. Toxic equivalent (TEQ_BaP) analysis highlights site-specific risks, underscoring the need to prioritize TEQ metrics over total PAHs concentrations for accurate risk assessment and targeted marine environmental management. The complex interplay between the spill - derived PAHs and pre - existing industrial pollution implies that remediation efforts must consider both acute and chronic contamination sources.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"107594"},"PeriodicalIF":3.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145274986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Beyond competition: food availability shapes trophic interactions between benthic harpacticoid copepods and free-living nematodes","authors":"Anna-Maria Vafeiadou,&nbsp;Marleen De Troch","doi":"10.1016/j.marenvres.2025.107591","DOIUrl":"10.1016/j.marenvres.2025.107591","url":null,"abstract":"<div><div>Species interactions are fundamental drivers of ecosystem functioning, yet their role in structuring trophic relationships among benthic meiofauna remains poorly understood. We examine <strong>biotic interactions</strong> between the two most abundant taxa in estuarine environments, copepods and nematodes, as a case study of interspecific competition for trophic niches. Using controlled microcosm experiments with varying food regimes (diatoms alone vs. diatoms with bacteria), we assessed whether food composition or interspecific interactions influence fatty acid composition and food assimilation in our test species, the harpacticoid copepod <em>Platychelipus littoralis</em>. Our results demonstrate that trophic dynamics of intertidal benthic copepods are primarily structured by food resource diversity (single vs. mixed diet) and quality, rather than direct interspecific competition. The absence of interaction effects on copepod survival, fatty acid composition, and food assimilation suggests that niche overlap does not necessarily result in competitive exclusion, at least under moderate food availability. Copepods showed reduced diatom assimilation when bacterial food was available, but bacterial uptake was unaffected by nematode presence, indicating trophic flexibility. These findings underscore the importance of food quality and microbial composition in shaping meiofaunal interactions and energy flow, and the need to integrate microbial–meiofaunal linkages into studies of benthic ecosystem functioning.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"Article 107591"},"PeriodicalIF":3.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145232932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Seasonal patterns and environmental drivers of gastropod distribution in southeastern Bangladesh.","authors":"Md Royhanur Islam, Eric Goberville, Anik Saha, S M Sharifuzzaman, M Shahadat Hossain","doi":"10.1016/j.marenvres.2025.107593","DOIUrl":"https://doi.org/10.1016/j.marenvres.2025.107593","url":null,"abstract":"<p><p>Gastropods serve as important indicators of biodiversity in coastal ecosystems, fulfilling critical ecological roles. This study comprehensively assessed gastropod diversity across three southeastern coastal islands of Bangladesh (Kutubdia, Moheskhali, and Sonadia) and examined its relationship with seasonal environmental factors. We documented 144 gastropod species from 65 genera, 28 families, and 3 orders. Monthly in-situ measurements of key environmental variables-including salinity, temperature, dissolved oxygen, nutrient concentrations, and suspended/dissolved solids-revealed marked seasonal fluctuations. For example, the monsoon season featured high total suspended solids alongside low salinity and total dissolved solids, whereas the post-monsoon period exhibited peak temperature and pH levels. Gastropod species richness varied significantly across seasons, peaking in winter and pre-monsoon. Principal Component Analysis identified salinity and total dissolved solids as primary environmental drivers influencing gastropod abundance and community composition. Generalised Linear Mixed Models confirmed that elevated salinity and total dissolved solids were major determinants of species richness, particularly enhancing it during winter. Additionally, species composition displayed pronounced seasonal shifts, with distinct assemblages characterising the post-monsoon period. Indicator species analysis highlighted Oliva sp. as a key indicator of the post-monsoon season and Umbonium sp. for winter assemblages. Our findings underscore that gastropod diversity in southeastern Bangladesh is intricately shaped by dynamic seasonal environmental changes. Understanding these patterns is critical for advancing knowledge of coastal ecosystem dynamics and for guiding conservation efforts in this climate-sensitive region. Several edible gastropods were documented-e.g., Littorina undulata, Umbonium spp. (U. vestiarium), Telescopium, and Babylonia spp.-which were locally abundant at multiple study sites. These species play important functional roles and are economically significant, contributing to food security and coastal livelihoods.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"107593"},"PeriodicalIF":3.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145244762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Microbial community dynamics and ecological interactions during an atypical winter Cerataulina pelagica (Bacillariophyta) bloom in Laizhou Bay, southern Bohai Sea","authors":"Long Yang ,&nbsp;Hongwei Wang ,&nbsp;Zhengguo Cui ,&nbsp;Hualong Wang ,&nbsp;Xiaokun Ding ,&nbsp;Di Zhang ,&nbsp;Huanyu Zhang ,&nbsp;Sheng Li ,&nbsp;Tao Jiang","doi":"10.1016/j.marenvres.2025.107589","DOIUrl":"10.1016/j.marenvres.2025.107589","url":null,"abstract":"<div><div>An atypical winter <em>Cerataulina pelagica</em> bloom outbroke in Laizhou Bay (LZB), southern Bohai Sea during Nov. 2021 and Feb. 2022, which caused a significant economic loss of aquaculture industry. Here, we conducted three large-scale cruise surveys (summer, autumn, and winter) and a one-year surveys (control, pre-bloom, bloom, and post-bloom) in LZB, and used 16S and 18S rRNA genes high-throughput sequencing techniques to reveal the dynamics of microbial communities during the <em>C. pelagica</em> blooms. Our results showed that microbial diversity decreased during algal blooms in both surveys. In addition, there were significant differences between microbial communities at each stage. In the large-scale surveys, the dominant phytoplankton groups changed from Chlorophyta and Dinoflagellate to Bacillariophyta (mainly <em>Cerataulina</em>) with the occurrence of algal blooms in winter. Alphaproteobacteria (Rhodobacteraceae and Clade I) and Actinobacteriota (Actinomarinaceae and Microbacteriaceae) were the most abundant bacterial taxa. In the one-year surveys, <em>Cerataulina</em> were, as expected, the dominant phytoplankton group during the bloom period. Rhodobacteraceae and Bacteroidota (Flavobacteriaceae) were the dominant bacterial groups during the peak period of blooms, whereas Microbacteriaceae gradually enriched with the decline of blooms. A variety of environmental factors (temperature, salinity, and nutrients) had significant effects on microbial communities. In addition, co-occurrence network analysis revealed positive relationships within microbial communities during algal blooms. The microbial prediction function mainly included phototrophy, chemoheterotrophy, and nitrogen and sulfur metabolisms, and there were significant changes in different stages. Overall, this study further reveals the interaction mechanisms and ecological effects of microbial communities during algal blooms.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"Article 107589"},"PeriodicalIF":3.2,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145206756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Synoptic view of an unprecedented red tide in autumn/winter in the Bohai Sea, China, triggered by extreme rainfall events","authors":"Rongjie Liu ,&nbsp;Yanfang Xiao ,&nbsp;Tingwei Cui ,&nbsp;Ning Wang ,&nbsp;Wei Zhao ,&nbsp;Xin Zhao ,&nbsp;Xiaojuan Guo ,&nbsp;Kunpeng Sun ,&nbsp;Yi Ma","doi":"10.1016/j.marenvres.2025.107588","DOIUrl":"10.1016/j.marenvres.2025.107588","url":null,"abstract":"<div><div>In the context of global climate change, the incidence of atypical red tide events has increased. The Bohai Sea, characterized by a temperate monsoon climate, typically experiences red tide during the summer, with infrequent occurrences during the autumn and winter. Nevertheless, an extensive red tide manifested in the Bohai Sea during the autumn and winter of 2021. Its spatial and temporal distribution characteristics, along with the underlying driving mechanism, warrant further investigation. This study employs multi-source, high-resolution satellite data to delineate the spatiotemporal evolution of this unprecedented red tide. The driving mechanism was analyzed using the sea surface temperature (SST), photosynthetically active radiation (PAR), sea surface salinity (SSS), and riverine nutrients data. Multi-satellite data indicate that the red tide was marked by its extensive spatial distribution and prolonged duration. It was first detected on October 12 and persisted until November 27, covering a daily maximum and minimum area of 3287.46 km² and 9 km², respectively. The red tide encompassed three sub processes, including the red tide process in the southern part of Bohai Bay, the red tide process in the Yellow River estuary, and the red tide process in the Laizhou Bay and the south of Bohai Strait, with a cumulative red tide distribution area exceeding 35,000 km². The driven mechanism analysis suggests that the red tide might be correlated with the elevated riverine nutrient loads, a consequence of the most severe autumn flood of the Yellow River since the 1940s, caused by extreme rainfall events. Historical data analysis indicates that another winter red tide in 2007 within the Bohai Sea was also caused by an atypical meteorological event. The results indicate that in addition to the atypical meteorological event itself, its eco-hazard risk, is also worth studying in the context of global climate change.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"Article 107588"},"PeriodicalIF":3.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145225649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"On a trawled north Pacific seamount, reductions of benthic megafauna abundance, diversity, and ecosystem function are correlated with increased evidence of fishing.","authors":"Virginia C Biede, Nicole B Morgan, E Brendan Roark, Amy R Baco","doi":"10.1016/j.marenvres.2025.107587","DOIUrl":"https://doi.org/10.1016/j.marenvres.2025.107587","url":null,"abstract":"<p><p>High-seas seamounts in the Hawaiian-Emperor Seamount Chain are exposed to bottom-contact fisheries, i.e., historical and contemporary trawl, coral tangle net, longline, and gillnet fisheries, that disturb vulnerable marine ecosystem megafauna, such as deep-sea corals and sponges. Koko Guyot is the largest of these features and has experienced destructive fishing practices for more than half a century. To better understand the state of vulnerable megafaunal communities on Koko, the submersibles Pisces IV and V obtained high-quality imagery from replicate transects of 500 m length at two sites along 400, 500, and 600 m depth contours. Visual evidence of fishing, trawl scars and anthropogenically sourced debris, were compared to the abundance, diversity, and ecosystem function of benthic megafauna. Multiple faunal assemblages were observed, ranging from depauperate communities dominated by sea urchins and cup corals to diverse coral gardens with octocorals and scleractinian reef-forming species. Overall, megafaunal abundance, diversity, and metrics of ecosystem function were significantly negatively correlated with increased visual evidence of fishing. Coralliid octocorals were previously targeted by fisheries on the seamount chain and were found in low abundance on Koko, supporting the evidence for disturbance. Yet the pockets of diverse octocoral gardens with small colonies of reef-forming scleractinian species support the presence of remnant or recovering populations. Therefore, Koko appears to host a mosaic of disturbed, recovering, and remnant communities requiring protection from future disturbance. This study highlights the importance of fine-scale analyses for assessing disturbed, remnant and recovering communities.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"107587"},"PeriodicalIF":3.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145251642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Advancing marine debris counting during extreme weather events: Deep learning applications in Typhoons Saola and Haikui.","authors":"Boyu Zhang, Fei Zhang, Jiangang Hui, Xuming Peng, Jinhu Zhang, Yu Zhang","doi":"10.1016/j.marenvres.2025.107563","DOIUrl":"https://doi.org/10.1016/j.marenvres.2025.107563","url":null,"abstract":"<p><p>Traditional sampling methods have been limited by the weather condition. If the a typhoon occurs in the study area, researchers can only collect samples before and after the event, as it is not possible to obtain data during the typhoon weather. In this study, we proposed the method noted as \"Smart Debris Counting\"(SDC), which integrated the deep learning and the shore-based fixed camera to investigate marine debris in the midst of a typhoon. With this approach, we collected the marine debris data and ten different algorithms was trained for it. The best-performing algorithm, which was evaluated on the dataset using mean Average Precision (mAP) and processing time, was selected for the continuous debris monitoring in the Dongshan Sea area during the typhoon event. The main results were as follows. (1) A new artificial intelligence algorithm was developed to effectively identify debris during extreme weather, which could achieve the mAP of 84.48 % and processing time of 0.2153 s/image. (2) This algorithm could realize the 8-days continuous collection of uninterrupted data, which collected 2080 images in total from 20 stations during the period of Typhoons Saola and Haikui. (3) Based on the SDC monitoring, the debris was increased by 8.3 % and 37 % respectively after Typhoon Saola and Haikui. Hence, using deep learning method to monitor marine debris is more efficient to acquire continuous-uninterrupted data, compared to some traditional sampling surveys. This is significantly valuable for understanding the spatiotemporal dynamics of debris distribution, clustering trends, and types within the region.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"212 ","pages":"107563"},"PeriodicalIF":3.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145251649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}