Marine environmental research最新文献

{"title":"Electromagnetic fields from submarine power cables: A 35 Year synthesis of effects on aquatic biota","authors":"Elizabeth James ,&nbsp;Mojtaba Ghodsi ,&nbsp;Alex T. Ford","doi":"10.1016/j.marenvres.2026.107916","DOIUrl":"10.1016/j.marenvres.2026.107916","url":null,"abstract":"<div><div>Submarine power cables (SPCs) associated with offshore renewable energy developments emit electromagnetic fields (EMFs) that can influence aquatic biota. Although research on this topic has increased, a comprehensive, systematic synthesis of observed effects across taxa and life stages, and biological contexts has been lacking. Following PRISMA 2020 guidelines (PROSPERO ID: 1138188), we systematically reviewed peer-reviewed and grey literature published between 1990 and 2024. Of 1637 records screened, 67 eligible field and laboratory studies were included. Significant behavioural and physiological responses to EMF exposure were reported in 66% of studies, with early life stages (embryos, larvae, juveniles) and magnetosensitive taxa, particularly fishes and crustaceans being most frequently affected. Effects occurred even at environmentally relevant intensities (&lt;250 μT). Laboratory experiments more frequently detected effects than field studies, which were generally fewer, shorter in duration, and methodologically heterogeneous. Sensitivity heatmaps identified developmental stages and freshwater species as particularly sensitive, with notable taxonomic disparities. EMFs from SPCs can elicit ecologically relevant responses in aquatic biota, particularly during sensitive developmental windows and in magnetically responsive taxa. Emerging evidence further indicates that sex specific responses represent an important and previously under recognised dimension of EMF sensitivity. However, major uncertainties persist regarding chronic, population and ecosystem level impacts. Future research should prioritise standardisation of exposure characterisation and reporting, routine inclusion of sex and life stage as biological variables and coordinated laboratory to field validation. Integrating EMF considerations into marine spatial planning, environmental regulation, and biodiversity conservation frameworks will be essential to support proportionate ecological risk assessment and management of offshore renewable energy infrastructure.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107916"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171070","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":"Membrane fingerprints and morphotype shifts in Phaeodactylum tricornutum co-exposed to cadmium and PBAT macroplastics as ecotoxicological indicators","authors":"Oumaima Salhi ,&nbsp;Bernard Lasserre ,&nbsp;Adélaïde Le Grand ,&nbsp;Philippe Douzenel ,&nbsp;Mikaël Kedzierski ,&nbsp;Anthony Magueresse ,&nbsp;Monia Trabelsi ,&nbsp;Lazhar Mhadhbi ,&nbsp;Olivier Sire ,&nbsp;Véronique Le Tilly","doi":"10.1016/j.marenvres.2026.107890","DOIUrl":"10.1016/j.marenvres.2026.107890","url":null,"abstract":"<div><div>This study investigates the individual and combined effects of cadmium (Cd²⁺) and poly (butylene adipate-co-terephthalate) (PBAT), a biodegradable macroplastic, on the marine diatom <em>Phaeodactylum tricornutum (P. tricornutum)</em>. Interestingly, co-exposure with PBAT mitigates Cd²⁺ toxicity, except at high Cd²⁺ concentrations. Using a non-invasive Fourier-transform infrared (FTIR) spectroscopy protocol with robust acquisition parameters and principal component analysis, specific biochemical changes in membrane composition were monitored, with notable decreases in carbohydrate and lipid contents, while protein levels remained unaltered. Morphological observations revealed a shift toward the oval morphotype under exposure to Cd²⁺ and PBAT, alone and in combination, featuring a stress response. Additionally, the light-harvesting pigments, chlorophyll-a and fucoxanthin, increased in a dose-dependent manner upon Cd²⁺ exposure, while no significant β-carotene changes were observed, except at high Cd²⁺ concentrations in the presence of PBAT. This effect is further amplified under co-exposure conditions, the presence of PBAT leading to a marked increase in all three pigments, β-carotene included. The experimental protocol, which involved the aging of PBAT macroplastics in seawater for a short period, suggests that the degradation products of PBAT themselves are responsible for these observed biological effects. It is worth noting that morphotype shifts occur at lower Cd²⁺ concentrations than those affecting photosynthesis and photoprotective systems. These findings highlight the potential of <em>P. tricornutum</em> membrane fingerprints and morphotype shifts as sensitive ecotoxicological indicators of metal and plastic pollution, particularly in relation to degradation by-products in marine environments.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107890"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146113589","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":"Carbon concentration mechanisms in Canary Islands macroalgae and their implications for future benthic community structure under ocean acidification","authors":"Celso A. Hernández ,&nbsp;Beatriz Alfonso ,&nbsp;Carla Pérez ,&nbsp;José Carlos Hernández","doi":"10.1016/j.marenvres.2026.107898","DOIUrl":"10.1016/j.marenvres.2026.107898","url":null,"abstract":"<div><div>In recent decades, due to the anthropogenic CO₂ concentration increase in the atmosphere, the chemistry of seawater has been seriously altered, producing the phenomenon known as Ocean Acidification (OA). Of all the dissolved inorganic carbon (DIC) present in seawater, only 1% is in the form of CO₂. However, if anthropogenic CO₂ emissions to the atmosphere continue, it will no longer be a limiting resource. Part of the response of marine photosynthetic organisms to these changes depends on their carbon physiology. The presence and effectiveness of carbon concentration mechanisms (CCM) can define the production and growth of macroalgae under OA conditions. Although CCMs are not essential when the seawater concentration of inorganic carbon is high, species that do not use them can see their performance improved. Our goal was to determine the presence or absence of CCMs in a total of 19 species of common macroalgae in the Canary Islands through a pH drift experiment and to establish their primary production rates through incubations and measurements of the O₂ variation. Samples of each species were incubated during 8, 24 and 32 h in isolated containers and under controlled lighting and temperature conditions. Of the 19 species studied, 11 presented CCM and 8 did not present CCM. Five of the eight species that did not show the presence of CCMs in the present study are present in the CO₂ seeps of Fuencaliente and one of them, <em>H. scoparia</em> is a dominant species.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107898"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146119463","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":"Nickel and cobalt disrupt the microbiome and metabolic function of the photosymbiotic sea slug Berghia stephanieae (Á. Valdés, 2005)","authors":"Corinna Sickinger ,&nbsp;Alicia Thiel ,&nbsp;Julia Bornhorst ,&nbsp;Gregor Christa ,&nbsp;Angelika Preisfeld","doi":"10.1016/j.marenvres.2026.107845","DOIUrl":"10.1016/j.marenvres.2026.107845","url":null,"abstract":"<div><div>The rapid global expansion of electromobility has increased demand for nickel and cobalt, which are key components in lithium-ion batteries. As a result, mining activities are intensifying, yet their ecological impact on marine ecosystems remains poorly understood. In this study, we examine the effects of nickel and cobalt on the microbiome composition and bacterial metabolic pathways of the marine photosymbiotic gastropod <em>Berghia stephanieae</em>. Preliminary toxicity tests showed concentration-dependent metal uptake, with behavioural stress responses such as lethargy, cessation of feeding, and shedding of cerata occurring at high concentrations (around 18 mg/L for nickel and cobalt). Microbiome analysis across three concentrations (1, 3, and 17 mg/L for nickel and cobalt) revealed significant changes in community composition and function. At 1 mg/L, the observed effects were concentration-dependent rather than metal-specific, as indicated by a decline in alpha diversity and a shift in community composition, characterised by a reduction in <em>Mycoplasma</em> sp. and an increase in Pseudofulvibacter and <em>Endozoicomonas</em> sp. At 3 mg/L, <em>Shewanella</em> spp. abundance increased and metal-specific effects emerged, with a strong downregulation of the metabolic pathways denitrification and lignin degradation for cobalt and an upregulation of sulfur oxidation for nickel. At 17 mg/L, many functional pathways were downregulated, aligning with observed host stress and pointing to a possible loss of functional redundancy. Overall, nickel and cobalt exposure led to distinct microbiome alterations, with intermediate levels eliciting the strongest metabolic response.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107845"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146006819","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":"Genomic resilience to sequential environmental perturbations in two sympatric costal fish species","authors":"Maribet Gamboa ,&nbsp;Florence Tellier ,&nbsp;Constanza Millán-Medina ,&nbsp;Diego Silva ,&nbsp;Eduardo Hernández-Miranda","doi":"10.1016/j.marenvres.2026.107893","DOIUrl":"10.1016/j.marenvres.2026.107893","url":null,"abstract":"<div><div>Natural disasters impose acute environmental stressors that can drastically reshape marine populations. Abrupt changes in habitat, resulting from hypoxia due to upwelling and seismic-induced tsunamis, are known chronic events, but their effects on marine taxa are poorly studied. This study investigates the genomic and mitochondrial responses of two coastal fish species, <em>Aphos porosus</em> and <em>Normanichthys crockeri</em>, to two sequential disturbances: a hypoxic upwelling event in 2008 and a seismic-induced tsunami in 2010 in Coliumo Bay, Chile. Whole-genome and mitochondrial DNA analyses may reveal strong genetic differentiation and reduced genetic diversity in <em>N. crockeri</em>, indicating a demographic bottleneck and adaptive shifts. While <em>A. porosus</em> could exhibited genomic resilience, likely due to parental care and sex-biased dispersal, with moderate mitochondrial divergence and increased matrilineal diversity post-disturbance. Functional annotations highlighted possible signatures of stress response, metabolic adaptation, and mitochondrial plasticity. These findings may underscore the complex interplay of ecological traits, environmental stressors, and genetic mechanisms driving population resilience and structuring in marine systems.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107893"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080430","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":"A phycospheric bacteria perspective: Preliminary investigation into the differential formation of sporangial branchlets in Pyropia haitanensis under varied temperatures and light intensities","authors":"Rui Zhao ,&nbsp;Rui Chai ,&nbsp;Qingli Gong ,&nbsp;Ningning Xu ,&nbsp;Wenjie Yan ,&nbsp;Xu Gao","doi":"10.1016/j.marenvres.2026.107848","DOIUrl":"10.1016/j.marenvres.2026.107848","url":null,"abstract":"<div><div>Temperature and light intensity are two important abiotic factors influencing the growth and development of marine macroalgae. In this study, we investigated the differences in the sporangial branchlets formation of <em>Pyropia haitanensis</em> under different temperatures and light intensities. The physiological profiling and phycospheric bacterial community changes were examined. We observed that the increasing temperature group (Group A: 29 °C, 60 μmol m⁻² s⁻¹, and Group C: 29 °C, 20 μmol m⁻² s⁻¹) exhibited extensive formation of sporangial branchlets, whereas the decreasing light intensity group (Group B: 21 °C, 60 μmol m⁻² s⁻¹) rarely formed sporangial branchlets. Conchocelis of <em>P. haitanensis</em> adapted to temperature and light intensity shifts by altering chlorophyll fluorescence, pigment proteins and oxidative damage indicator (malondialdehyde). The 16S rRNA gene sequencing revealed significant differences in the relative abundance of phycospheric bacteria among the 4 treatments. The relative abundance of 7 bacteria was significantly increased in Group A and Group C, while that of 4 bacteria was increased in the Group B. Notably, <em>Bacillus</em> and <em>Pseudonocardia</em> were common dominant phycospheric bacteria in the increasing temperature group. Correlation heatmap analyses revealed that the phycospheric bacteria were closely associated with the environmental factors and physiological data. However, the underlying mechanism of this association remains to be further investigated. This study contributes to understanding how environmental changes and microorganisms are linked in the artificial seedling cultivation of <em>P. haitanensis</em>.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107848"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080432","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":"Bio-invasion and decadal changes in the trophic dynamics of a temporarily closed estuary: An Ecopath model from Veli-Akkulam Estuary, Kerala, India","authors":"Regi Syamala Ramachandrannair ,&nbsp;Kiranya Bella ,&nbsp;Sreekanth Giri Bhavan ,&nbsp;Smrithy Raj ,&nbsp;Appukuttannair Biju Kumar","doi":"10.1016/j.marenvres.2026.107895","DOIUrl":"10.1016/j.marenvres.2026.107895","url":null,"abstract":"<div><div>Temporarily closed estuarine ecosystems (TCEs) are ecologically sensitive environments increasingly impacted by anthropogenic pressures and biological invasions. This study employs a mass-balanced trophic model using the Ecopath with Ecosim (EwE) framework to evaluate long-term changes in the structure and function of the Veli-Akkulam Estuary, a small TCE on the southwest coast of India. Based on field data from 2022 to 2023, the model integrates 17 functional groups, including invasive alien species such as <em>Oreochromis mossambicus</em>, <em>O. niloticus</em>, and <em>Pterygoplichthys pardalis</em>. Model outputs were compared with historical assessments from 1993 to 2008–2010 to examine decadal-scale shifts in ecosystem properties and dynamics.</div><div>Key ecological indicators such as mean trophic level of the catch (2.69), transfer efficiency (7.69 %), and Finn's Cycling Index (2.64 %) point to a simplified, detritus-dominated food web with reduced energy cycling and declining trophic maturity. Biomass is concentrated at lower trophic levels, while apex predators and native piscivores have markedly declined. Mixed Trophic Impact analysis revealed strong negative interactions between invasive species, particularly <em>O. mossambicus</em>, and native fish groups, suggesting competitive displacement and altered trophic relationships. High niche overlap further supports the hypothesis of dietary competition between invasive and native taxa, contributing to trophic reorganization.</div><div>System-level metrics, including a relative ascendancy of 37.42% and system overhead of 62.58%, indicate reduced ecosystem organization and rising instability. These trends reflect a transition from a functionally complex system to one increasingly dominated by opportunistic and invasive species. The study underscores the utility of Ecopath with Ecosim-based modelling in diagnosing trophic degradation and informing adaptive management. This study provides the first decadal Ecopath model demonstrating invasion-driven trophic simplification in a temporarily closed tropical estuary, and offers a replicable framework for assessing cumulative ecological impacts in tropical estuarine systems impacted by invasive species.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107895"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171069","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":"Ocean acidification modifies site fidelity and patterns of seagrass habitat use by a herbivorous fish","authors":"Alice Mirasole ,&nbsp;Antonio Di Franco ,&nbsp;Cristina Andolina ,&nbsp;Maria Cristina Gambi ,&nbsp;Bronwyn May Gillanders ,&nbsp;Giovannella Pecoraino ,&nbsp;Patrick Reis-Santos ,&nbsp;Giovanna Scopelliti ,&nbsp;Emanuele Somma ,&nbsp;Salvatrice Vizzini ,&nbsp;Nuria Teixidó","doi":"10.1016/j.marenvres.2026.107914","DOIUrl":"10.1016/j.marenvres.2026.107914","url":null,"abstract":"<div><div>Ocean acidification (OA), characterized by changes in seawater chemistry and a concomitant decline of pH due to the uptake by seawater of the atmospheric CO₂, will profoundly shape marine ecosystems. The lower pH/higher <em>p</em>CO₂ can act negatively (as a stressor for organisms with a calcareous exoskeleton) or positively (as a direct resource for primary producers like macrophytes). Consequently, herbivores may indirectly benefit from OA counteracting the direct negative effects of living under high <em>p</em>CO₂/low pH conditions. Here, we investigated how OA may influence site fidelity, habitat use, and trophic behaviour patterns of <em>Sarpa salpa,</em> the main herbivorous fish associated with <em>Posidonia oceanica</em> meadows in the north-western Mediterranean Sea. We assessed if and how OA influences the habitat use of <em>S. salpa</em> by comparing natural tags, in otoliths and muscle tissues, between CO₂ vents and reference pH sites. We did not find differences in otolith elemental composition and shape among fish exposed to different pH conditions (CO₂ vent <em>vs</em> ambient pH sites). However, otolith isotopic signatures differed between life stages (young <em>vs</em> sub-adults), consistent with the variations observed in seawater-dissolved inorganic carbon across sites. Finally, comparisons of the nutritional value marine vegetation (macroalgae, <em>P. oceanica</em>, epiphytes) showed that <em>P. oceanica</em> and epiphytes were more nutritious at CO₂ vents, along with increased consumption by <em>S. salpa</em>. This trophic separation indicates that <em>S. salpa</em> spent more time exploiting the trophic resources in the CO₂ vents. Together, our findings shed new light on plant–herbivore interactions within <em>P. oceanica</em> meadows under future OA scenarios.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107914"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171101","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":"Impacts of co-exposure to nanoplastics and ofloxacin on marine planktonic microbial communities and DMSP dynamics","authors":"Yurou Jiang ,&nbsp;Wangxinze Shu ,&nbsp;Jiyuan Wan ,&nbsp;Jinke Yan ,&nbsp;Qian Liu ,&nbsp;Yong Jiang","doi":"10.1016/j.marenvres.2026.107908","DOIUrl":"10.1016/j.marenvres.2026.107908","url":null,"abstract":"<div><div>Dimethylsulfoniopropionate (DMSP) is a key organic sulfur compound in marine food webs and the main precursor of the climate-active gas dimethyl sulfide (DMS), yet its water-column cycling under the joint influence of emerging pollutants remains poorly constrained. A 19-day microcosm experiment was conducted to examine the long-term effects of single and combined exposure to nanoplastics (NPs) and the antibiotic ofloxacin on planktonic microbial communities and DMSP cycling in coastal seawater. Combined exposure induced much stronger inhibitory effects than either single pollutant, markedly weakening the late-phase biomass recovery observed under the antibiotic-only treatment. DMSP dynamics exhibited a biphasic disruption pattern: an initial transient accumulation was followed by persistently low concentrations later in the experiment, coinciding with pronounced declines in microeukaryotic and total biomass. Combined metagenomic and flow cytometric analyses revealed a “functional decoupling” scenario, in which the surviving community displayed elevated relative abundances of DMSP biosynthesis- and degradation-related genes, while the sharp reduction in microeukaryotic biomass and overall community size constrained the maintenance and renewal of the water-column DMSP pool. Co-occurrence network analysis further showed that co-exposure simplified the microbial network from a more distributed, complex structure to a highly centralized one, with fewer nodes and keystone taxa and decreased robustness indices along the pollution gradient. Together, these findings indicate that the co-occurrence of nanoplastics and antibiotics can disturb DMSP-related functions by eroding community structural stability and functional redundancy, providing experimental evidence for the vulnerability of coastal DMSP cycling to mixed-pollutant stress.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107908"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170833","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":"Cost-effective ecological monitoring in shallow waters using amphibious unmanned aerial vehicles (AUAV) and deep learning-based computer vision","authors":"Fan Zhao ,&nbsp;Jiaqi Wang ,&nbsp;Yijia Chen ,&nbsp;Xinlei Shao ,&nbsp;Yongying Liu ,&nbsp;Yulun Chen ,&nbsp;Feng Xue ,&nbsp;Jun Sasaki ,&nbsp;Katsunori Mizuno","doi":"10.1016/j.marenvres.2026.107911","DOIUrl":"10.1016/j.marenvres.2026.107911","url":null,"abstract":"<div><div>Traditional marine monitoring techniques, like line intercept transects, are inefficient. Modern methods, including autonomous underwater vehicles (AUVs) and Portable Speedy Sea Scanner (P-SSS), face high costs and labor demands, with limited data quality. This study proposes an amphibious unmanned aerial vehicle (AUAV) integrated with deep learning, enabling both aerial and underwater imaging with real-time GNSS information. The AUAV operates continuously for approximately 30 min and achieves high survey efficiency in shallow waters (0.5–10 m), providing a practical alternative to conventional underwater survey platforms. YOLOv8 is integrated with the AUAV for underwater litter detection and sea cucumber instance segmentation. For underwater litter detection, YOLOv8 achieved a mean average precision (mAP) of 0.764, representing an absolute improvement of 0.144 (approximately 23.2% relative gain) compared with a previously reported Mask R-CNN benchmark (mAP = 0.62). For sea cucumber monitoring, YOLOv8 achieved mAPs of 0.792 for object detection and 0.798 for instance segmentation across two classes, enabling robust pixel-level delineation of individual organisms. Based on the instance segmentation results, pixel-level size estimation of sea cucumbers was achieved by converting skeleton–edge distances into physical dimensions using the mapped spatial resolution (0.21 cm), demonstrating the capability of the AUAV–YOLOv8 framework for quantitative and efficient shallow-water ecological monitoring.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107911"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171129","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}