Regional Studies in Marine Science最新文献

{"title":"Geochemical source apportionment, pollution indices, and Monte Carlo-based health risk assessment of trace elements in soil and surface water from the Mirsarai Export Processing Zone (MEPZ), Bangladesh","authors":"Md. Shazzadur Rahman,&nbsp;Md. Golam Mostafa,&nbsp;Mohammad Moniruzzaman,&nbsp;Mahima Ranjan Acharjee,&nbsp;Lutfa Ara Takeya,&nbsp;Md. Aminur Rahman,&nbsp;Abubakr M. Idris,&nbsp;Md. Ripaj Uddin","doi":"10.1016/j.rsma.2026.105300","DOIUrl":"10.1016/j.rsma.2026.105300","url":null,"abstract":"<div><div>This study presents a comprehensive geochemical assessment of trace element contamination in soil and surface water within the Mirsarai Export Processing Zone (MEPZ), Bangladesh. Thirteen sediment and surface water samples were analyzed for twelve trace elements (As, Se, Pb, Cd, Co, Cr, Cu, Mn, Ni, Zn, Hg, and Fe) using ICP-MS. Source apportionment was conducted via Pearson correlation and PCA, with health risks evaluated through deterministic and probabilistic Monte Carlo simulations (100,000 iterations). Results revealed significant contamination exceeding WHO guideline values. In soil, mean concentrations of As (22.48 mg/kg), Se (6.01 mg/kg), Co (97.80 mg/kg), Cr (234.48 mg/kg), Ni (250.34 mg/kg), and Zn (476.83 mg/kg) and surface water exhibited extreme pollution with Mn (19.36 mg/L), Pb (0.480 mg/L), Cr (1.44 mg/L), and Ni (1.88 mg/L) far above permissible limits. Pollution indices indicated very high ecological risk (soil PERI: 599.79–1501.39; PLI: 2.49–4.30; water HPI: 2423.87). PCA identified three principal components explaining 89.62% (soil) and 79.54% (water) of variance, indicating mixed lithogenic and industrial sources. Health risk assessment revealed unacceptable non-carcinogenic risks for children (HI &gt; 1 for As, Co, Cr, Cu, Mn, Pb) and adults (Co, Cr, Cu, As, Mn), with surface water posing greater threats. Carcinogenic risks from Ni (TCR: 5.47E-03 for children, 1.76E-03 for adults), Cr, and As exceeded USEPA limits. Monte Carlo simulation confirmed mean carcinogenic risks of 1.58E-04 (children) and 4.24E-05 (adults), with Cr ingestion contributing &gt; 70% of children's risk. Findings reveal a severe ecological and health crisis from trace metal contamination, demanding urgent soil/water remediation, strict industrial enforcement, and continuous monitoring to protect regional ecosystems and public health.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105300"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148740540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Pollution gradient alters mangrove vegetation and benthic macro-invertebrate community patterns in an urban city, Dar es Salaam, Tanzania","authors":"Eliengerasia Godliving Koka,&nbsp;Samwel Mchele Limbu,&nbsp;Catherine Aloyce Masao,&nbsp;Charles Joseph Kilawe","doi":"10.1016/j.rsma.2026.105307","DOIUrl":"10.1016/j.rsma.2026.105307","url":null,"abstract":"<div><div>Mangrove forests are vital coastal ecosystems that protect shorelines, support biodiversity, and sustain coastal livelihoods. However, they are increasingly threatened by pollution from rapid coastal urban expansion. Yet, few studies have examined the influence of pollution gradients on mangrove vegetation and associated benthic macro-invertebrate communities. We investigated mangrove vegetation and macro-invertebrate species composition, abundance, and diversity across sites with varying pollution levels along the Dar es Salaam coast in Tanzania. Three mangrove sites were categorised as highly polluted (HP), moderately polluted (MP), and low polluted (LP) based on distance from the pollution source and sediment heavy metal concentrations. Afterwards, three 250 m transects were established perpendicular to the shoreline. Five 10 m × 10 m main plots were used to assess mangrove vegetation along each transect, while five 2 m × 2 m sub-plots were established to survey benthic macro-invertebrates. The results showed that the HP and MP sites had significantly lower mangrove species diversity than the LP site (p &lt; 0.05). However, the sites studied did not differ significantly in mangrove abundance (p &gt; 0.05). The HP site had significantly lower macro-invertebrate diversity than the LP site (p &lt; 0.05). However, the LP and MP sites had no significant difference in macro-invertebrate diversity (p &gt; 0.05). The HP site had a significant decline in mangrove diversity and macro-invertebrate abundance and diversity compared to the LP site. These findings indicate that pollution gradient alters mangrove vegetation and benthic macro-invertebrate community patterns, necessitating control measures to sustain biodiversity and community structure.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105307"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148738875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Occurrence and distribution of short-chain chlorinated paraffins (SCCPs) in sediments from mariculture bays in northern China","authors":"Feiyao Lu,&nbsp;Junhui Chen,&nbsp;Dan Fu,&nbsp;Xueting Zhang,&nbsp;Haoshun Zhang,&nbsp;Tongzhu Han,&nbsp;Xiuping He","doi":"10.1016/j.rsma.2026.105316","DOIUrl":"10.1016/j.rsma.2026.105316","url":null,"abstract":"<div><div>Short-chain chlorinated paraffins (SCCPs) are emerging organic pollutants, yet their occurrence characteristics and ecological risks in sedimentary environments of coastal aquaculture zones remain insufficiently characterized. This study provides the first systematic assessment of SCCPs contamination levels, spatial distribution, homolog patterns, and potential ecological risks in surface sediments from four representative mariculture bays in northern China. SCCPs were detected in all surface sediment samples across 41 stations, indicating their widespread presence in coastal mariculture sediments. ΣSCCP concentrations ranged from 6.02 to 70.79 ng/g (dry weight, dw) across the four bays, reflecting moderate to low pollution levels. Although concentrations varied among bays, higher values occurred mainly in coastal industrial zones, estuaries, ports, and other areas affected by human activity. Carbon homolog analysis (C₁₀–C₁₃) showed that sediments from Haizhou Bay, Jiaozhou Bay, and Sishili Bay were dominated by C₁₃ homologs (28.1%–50.2%), whereas sediments from Laizhou Bay were dominated by C₁₁ and C₁₂ components. When classified by chlorine number, Cl_5–7 SCCPs were the most abundant homologs (75.1%–80.3%) in all bays, reflecting strong associations with local industrial discharges and shipping activities. Although the ecological risk of SCCPs in the sediments is relatively low, their bioaccumulation potential and possible synergistic effects with other pollutants warrant continued attention to their environmental fate and their effects on benthic fishery organisms.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105316"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148740168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Revealing the presence and genetic identification of the rare and critically endangered deep-sea Sandy skate (Leucoraja circularis) in the Adriatic Sea","authors":"Andrej A. Gajić,&nbsp;Simone Di Crescenzo,&nbsp;Chiara Pani,&nbsp;Rita Cannas,&nbsp;Emina Karalić","doi":"10.1016/j.rsma.2026.105277","DOIUrl":"10.1016/j.rsma.2026.105277","url":null,"abstract":"<div><div>The sandy skate (<em>Leucoraja circularis</em>) is one of the rarest deep-sea batoids in the Mediterranean Sea and has long been considered absent or exceptionally rare in the Adriatic Sea. Here, we report seven confirmed records obtained through fishery-dependent monitoring along the upper continental slope of the southern Adriatic Sea off Vlorë, Albania. All individuals were captured at depths between 400 and 600 m, with six of seven records concentrated within a narrow depth interval (410–423 m) off the Karaburun Peninsula and Sazan Island. Both juvenile and adult specimens were documented, indicating the presence of multiple ontogenetic stages within the study area. These findings represent the first verified records from Albanian waters and constitute the largest dataset available for the species in the Adriatic Sea to date. All individuals were found dead upon retrieval, indicating alarmingly high at-vessel mortality for this critically endangered species. Molecular data confirmed species identification and provided new COI and NADH2 mtDNA sequences, representing the first regional molecular dataset for <em>L. circularis</em>, crucial for the establishing of a baseline for future assessments. Moreover, genetic analyses highlighted the occurrence of new private haplotypes in Albanian waters in both COI and NADH2 datasets, suggesting the presence of a possible resident population in the studied area. Together, these results confirm the occurrence of <em>L. circularis</em> in the southern Adriatic Sea and identify this region as a previously overlooked component of the species’ Mediterranean range, with important implications for monitoring, management, and conservation of one of the Mediterranean’s most threatened deep-sea skates.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105277"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Fishery status of key commercial marine fishes from the small-scale fisheries off the northern coast of the Colombian Pacific","authors":"Gian Luca Lo-Verso,&nbsp;Javier De La Hoz M.,&nbsp;Juan Carlos Narvaez-Barandica","doi":"10.1016/j.rsma.2026.105246","DOIUrl":"10.1016/j.rsma.2026.105246","url":null,"abstract":"<div><div>Small-scale fisheries from the northern coast of the Colombian Pacific sustain local livelihoods and food security, yet persistent pressures such as overfishing, unregulated and non-selective gears, weak management, and low awareness are driving declines. Many species are landed below length at maturity (L_mat), signaling intense fishing on immature fish and a high risk of overexploitation. This study assesses the fishery status of commercial fishes using data-limited length-based methods, combining simple indicators with the Length Based Spawning Potential Ratio (LBSPR) to evaluate species distribution, relative fishing pressure, and impacts on spawning biomass. Results showed a clear overexploitation for <em>Scomberomorus sierra</em>, <em>Lutjanus guttatus</em>, and <em>Caranx caballus</em>: catches were dominated by juveniles and SPR falls below precautionary reference points. In contrast, <em>Sphyraena ensis</em> showed no evidence of overfishing, with indicators, SPR included, remaining above thresholds. Patterns were consistent with gear selectivity: gillnets and shrimp gillnets remove smaller, immature fish, while handlines and longlines tend to capture larger, mature individuals. These findings call for straightforward measures aligned with life history benchmarks, including minimum sizes at L_mat, and L_opt harvest window (±10%), protection of large spawners, selective gear rules, and adaptive monitoring with LBSPR, to rebuild spawning biomass and secure the sustainability of multispecies small-scale fisheries and the communities that depend on them.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105246"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Risk assessment of microplastics in red octopus (Octopus maya) from the southern Gulf of Mexico","authors":"Jaime Rendón-von Osten,&nbsp;Maurilio Lara-Flores,&nbsp;Noe Josafat Luna-Zavaleta,&nbsp;Alan González-Euan,&nbsp;Juan José Sandoval-Gio,&nbsp;Merle Marisa Borges-Ramírez","doi":"10.1016/j.rsma.2026.105306","DOIUrl":"10.1016/j.rsma.2026.105306","url":null,"abstract":"<div><div>Microplastic (MPs) pollution in the oceans is a widespread problem; approximately 8 million tons are released into the oceans annually, reaching even the deepest marine regions and polar areas. Cephalopods, such as octopuses, are particularly susceptible to these pollutants due to their carnivorous diet, rapid development, and essential role in the food chain. The export of red octopus (<em>Octopus maya</em>) specie is highly valued in the international market, with approximately 6000 tons exported annually. Europe (especially Spain and Italy) is the main destination, followed by the United States and some Asian countries. This study investigated the ingestion of MPs in the red octopus from the coast of Campeche in the southern Gulf of Mexico. Ninety-five gastrointestinal tracts (GITs) were collected in 2021 (n = 50) and 2024 (n = 45). MPs were found in 93.68% of octopus gastrointestinal tracts, with a 30.80% increase in MPs load, rising from 3.18 ± 2.65 MPs/individual in 2021–4.62 ± 3.77 MPs/individual in 2024. The most common polymers found in the GITs of red octopuses were polyamide (PA), cellophane (CE), polyvinylidene fluoride (PVDF) and polyethylene (PE). The polymer hazard index (PHI) highlights a significant risk associated with polyvinyl chloride (PVC), polyacrylonitrile (PAN), and polyurethane (PUR) polymers. The increasing presence of MPs and hazardous polymers raises concerns about food safety and the sustainability of the red octopus fishery.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105306"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 and Morphological Characterization of Agricultural Waste-Reinforced Recycled HDPE Composites for Offshore Cage Frames","authors":"Nguyen Thi Kim Chi,&nbsp;Nguyen Van Tai,&nbsp;Nguyen Dac Kien,&nbsp;Nguyen Van Hoa","doi":"10.1016/j.rsma.2026.105312","DOIUrl":"10.1016/j.rsma.2026.105312","url":null,"abstract":"<div><div>This study presents the fabrication and properties of eco-friendly composite materials using recycled high-density polyethylene (rHDPE) as the matrix, reinforced with agricultural by-products, including wood powder, coconut fiber, and rice-husk-derived nano-silica (SiO₂). Nano-SiO₂ with a size range of 10–20 nm was successfully extracted from rice husk ash. The composites were prepared via thermal melting and compression molding at 180°C and 5 tons of pressure. Structural and morphological properties were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). Mechanical tests revealed that the addition of 2 wt% nano-SiO₂ significantly improved the tensile strength (640.88 MPa) and elastic modulus (1141.48 MPa) compared to those of pure rHDPE, 402.16 and 953.07 MPa, respectively. While increasing the content of wood powder or coconut fiber generally decreased tensile strength, these fillers modified flexural and water absorption properties. The significantly improved tensile and elastic properties confirm that structural requirements for marine aquaculture systems. By utilizing agricultural waste and recycled plastics, this material serves as a potential low-cost substitute for expensive virgin HDPE, drastically reducing the capital investment for offshore cage frame fabrication. These findings support the transition towards sustainable, bio-based engineering solutions for the regional mariculture industry.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105312"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148658847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Stock discrimination of the axillary seabream Pagellus acarne (Teleostei: Sparidae) along the mainland Portuguese coast using a complementary otolith geochemistry approach","authors":"R.G. Kulzer,&nbsp;A. Casaca,&nbsp;R.M. Silva,&nbsp;A. Méndez,&nbsp;J. Pisonero,&nbsp;R. Azevedo,&nbsp;A. Almeida,&nbsp;C. Schäfer,&nbsp;R.P. Vasconcelos,&nbsp;A.T. Correia","doi":"10.1016/j.rsma.2026.105298","DOIUrl":"10.1016/j.rsma.2026.105298","url":null,"abstract":"<div><div>The identification of population units is essential for proper fishery management to ensure the availability of fish populations. The axillary seabream, <em>Pagellus acarne</em> (Teleostei: Sparidae), represents a fishery resource in Portuguese waters; however, its stock structure remains unknown. The objective of this work was to use otolith geochemical signatures to identify the origin, habitat use, and ecological connectivity of P. acarne along the Portuguese coast, and determine whether the species constitutes a single connected demographic unit or multiple isolated population units requiring distinct fishery management strategies. Adult fish were sampled from three fishery grounds: two along the western coast (Matosinhos and Peniche) and one along the southern coast (Portimão). At each site, 25 individuals of the same age (4 years) were selected. Element:Ca ratios of Sr, Ba, Mn, Mg, Zn and Li were measured in otolith cores and edges using laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to characterize early-life and recent environmental histories, respectively. Whole otoliths were also analysed using solution-based ICP-MS (SB-ICP-MS) to obtain life-integrated chemical signatures. Spatial patterns were evaluated using univariate and multivariate analyses, and reclassification success was assessed by jackknife cross-validation. The results showed that whole-otolith geochemistry provided greater spatial discrimination than either core or edge signatures. Core and edge signatures showed limited discriminatory ability, with 56% and 44% reclassification success, respectively. Whole-otolith analysis provided the clearest spatial signal, revealing significant differences between Matosinhos and the other sampling sites and 63% overall reclassification success. This pattern was driven by lower Sr:Ca, Mn:Ca and Zn:Ca values in the northern region, possibly reflecting localized river input and/or adaptive responses. Overall, the results support the hypothesis of a single demographic unit characterized by high connectivity, with limited localized differentiation, particularly in the north. Future research should integrate complementary approaches and broader geographic sampling to detect large-scale population breaks.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105298"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Parasite fauna of lanternfish (Myctophidae) in the Canary Islands, with an assessment of the role of myctophids in cetacean parasite transmission","authors":"Alicia García-Gallego,&nbsp;Beatrice Giuliana Saba,&nbsp;Natacha Aguilar Soto,&nbsp;Alejandro Ariza,&nbsp;Natalia Fraija-Fernández,&nbsp;Francisco J. Aznar","doi":"10.1016/j.rsma.2026.105278","DOIUrl":"10.1016/j.rsma.2026.105278","url":null,"abstract":"<div><div>Myctophids act as a key link between lower and higher trophic levels in oceanic systems, thus they are expected to play an important role in the life cycles of helminths of cetaceans, but evidence about this role is scarce. To fill this gap, we examined the parasitic fauna of 380 myctophids belonging to 11 species collected from waters off the Canary Islands, which is considered a hotspot for cetaceans. We also analysed the stomach contents of myctophids to identify prey that could act as intermediate hosts, and compiled dietary information on cetaceans to assess the role of myctophids in the transmission to definitive hosts inhabiting the Canary Islands. The copepod <em>Cardiodectes bellottii</em>, the digenean <em>Lethadena profunda</em>, the acanthocephalan <em>Neorhadinorhynchus</em> sp., as well as larvae of 5 helminths specific to cetaceans, i.e. <em>Anisakis simplex</em> s.s., <em>Skrjabinisakis physeteris</em>, <em>S. brevispiculata</em>, <em>Pseudoterranova ceticola</em> and <em>Bolbosoma vasculosum</em>, were detected. Stomach contents were dominated by crustaceans, especially copepods and euphausiids, which are known to act as intermediate hosts at least for <em>Anisakis</em> spp. and <em>Bolbosoma</em> spp. Based on cetacean dietary data, we hypothesize that myctophids could directly transmit <em>A. simplex</em> s.s. to piscivorous cetaceans, whereas <em>S. physeteris</em>, <em>S. brevispiculata</em> and <em>P. ceticola</em>, could be transmitted to teuthophagous cetaceans mainly through cephalopods (especially <em>Histioteuthis</em> spp.) that prey on myctophids. The role of myctophids in the transmission of <em>B. vasculosum</em> is unclear. Based on data from this and previous studies, only species of <em>Anisakis</em>, <em>Skrjabinisakis</em>, <em>Pseudoterranova</em> and <em>Bolbosoma</em> have been reported from myctophids worldwide. Whether this group of fish is involved in the life cycle of other helminths infecting cetaceans remains an open question.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105278"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"A dual-polarimetric SAR oil spill detection model with background noise suppression and adaptive polarimetric feature weighting","authors":"Yikai Huang,&nbsp;Bingxin Liu,&nbsp;Lei Bing,&nbsp;Baozhan Liu,&nbsp;Lingxiao Cheng,&nbsp;Ying Li","doi":"10.1016/j.rsma.2026.105273","DOIUrl":"10.1016/j.rsma.2026.105273","url":null,"abstract":"<div><div>Marine oil spills pose a serious threat to the marine environment, coastal economy, and human health. Accurate oil spill detection on the sea surface is an important means of reducing such impacts. At present, deep learning methods based on polarimetric Synthetic Aperture Radar (SAR) polarimetric information have gradually become a research hotspot in oil spill detection. Most existing studies do not sufficiently consider the differences among polarimetric features, which may cause feature redundancy. Meanwhile, there is still a lack of models that can both suppress background noise and effectively exploit polarimetric features, leading to limited accuracy and high misclassification rates under sea conditions with diverse targets and complex wave conditions. To address these issues, we construct a dual-polarimetric SAR advantageous feature dataset and propose the Dual-Polarimetric SAR Oil Detection (DualSAR-Oil) model. To suppress the influence of background noise, we introduce the Convolutional Block Attention Module (CBAM). In addition, we design an Enhanced Polarimetric Squeeze-and-Excitation (EPSE). By dynamically adjusting the weights of polarimetric features, this module enables the effective exploitation of different polarimetric features. The experimental results show that DualSAR-Oil achieves an ACC of 97.75%, an F1-score of 96.75%, and an mIoU of 93.79%, outperforming SVM, U-Net, PSPNet, Segmenter, and DeepLabV3 +, improving oil spill detection accuracy and suppressing misclassification. The practical application along the Indian coast verifies its applicability, thereby providing a useful reference for practical oil spill detection.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"101 ","pages":"Article 105273"},"PeriodicalIF":2.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148638215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}