Marine environmental research最新文献

{"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}

{"title":"Field-adaptable RAA–CRISPR/LbCas12a assay for specific detection of Karenia brevis in natural seawater","authors":"Lu Wang ,&nbsp;Yinsheng Wu ,&nbsp;Wei Ying ,&nbsp;Bingshun Sun ,&nbsp;Zhenyue Lin ,&nbsp;Wei Wang ,&nbsp;Jianming Chen","doi":"10.1016/j.marenvres.2026.107909","DOIUrl":"10.1016/j.marenvres.2026.107909","url":null,"abstract":"<div><div><em>Karenia</em> species occur widely and can trigger harmful algal blooms (HABs) that threaten coastal ecosystems, aquaculture, and human health. <em>Karenia brevis</em> (<em>K. brevis</em>), a brevetoxin-producing species, is of particular concern. Although large blooms have not been reported in mainland China, <em>K. brevis</em> may occur at low abundance and can co-occur with morphologically similar <em>Karenia</em> spp., necessitating species-level detection. Here, we established a rapid assay for <em>K. brevis</em> by integrating recombinase-aided amplification (RAA) with clustered regularly interspaced short palindromic repeats (CRISPR)–Lachnospiraceae bacterium Cas12a (LbCas12a). RAA primers and crRNAs were designed from the highly variable internal transcribed spacer (ITS) region to discriminate <em>K. brevis</em> from closely related <em>Karenia</em> species. Readouts included fluorescence using a quenched reporter (FQ) and lateral-flow detection using a FAM–biotin reporter (FB) with a lateral flow dipstick (LFD). A simple fast-lysis DNA preparation was compatible with the RAA, supporting field-adaptable workflows followed by either portable fluorescence viewing or FB-LFD readout. The FQ format also supports kinetic monitoring on laboratory instruments. The assay detected 5.9 × 10³ copies/μL of ITS plasmid and as low as 1 cell/mL in seawater (0.1 cell-equivalents per reaction input) with no cross-reaction to nine non-target algal species. Natural HAB water collected in Lianjiang, Fujian (May 2024) was tested negative for <em>K. brevis</em> by the assay and by cloning/phylogenetic analysis, but became positive after spiking with <em>K. brevis</em> cells, indicating minimal seawater inhibition. This platform provides sensitive and specific detection of rapid <em>K. brevis</em> and is readily extendable to other closely related <em>Karenia</em> species.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107909"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171030","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":"Host species as key drivers of Symbiodiniaceae assemblages: Coral and free-living diversity in a Southwestern Atlantic oceanic island","authors":"Camila Rodrigues Lima ,&nbsp;Amana Guedes Garrido ,&nbsp;Barbara Morim ,&nbsp;Deborah Catharine de Assis Leite ,&nbsp;Carla Zilberberg","doi":"10.1016/j.marenvres.2025.107829","DOIUrl":"10.1016/j.marenvres.2025.107829","url":null,"abstract":"<div><div>Symbiodiniaceae is a diverse family of photosymbiont dinoflagellates known for forming mutualistic associations with reef-building corals and other marine invertebrates. This family comprises a diverse array of lineages with distinct physiological traits, enabling hosts to exhibit differential responses to environmental stressors. In addition to their endosymbiotic forms, Symbiodiniaceae also occur as free-living cells, potentially acting as environmental reservoirs that facilitate coral recolonization following bleaching events. This study provides the first comprehensive characterization of Symbiodiniaceae assemblages, examining both endosymbiotic and free-living assemblages across three reef sites using ITS2 rDNA next-generation sequencing at Fernando de Noronha archipelago (SWA). Sequences primarily belonged to the genera <em>Symbiodinium</em>, <em>Breviolum</em> and <em>Cladocopium</em> across all reef compartments. Both coral hosts and Symbiodiniaceae ITS 2 types exhibited generalist traits, with multiple associations observed. Endosymbiotic community structure was strongly host-driven, with most coral species dominated by a single ITS2 type, indicating high partner fidelity. Free-living assemblage (seawater and sediment) displayed greater diversity and a more even community composition compared to endosymbionts. A limited overlap was detected between coral-associated and environmental ITS2 sequences, suggesting restricted exchange but potential environmental reservoirs for dominant types. Our work reinforce that the corals hosts are the primary drivers of Symbiodiniaceae community structure in this oceanic island ecosystem. This research provide an essential baseline data for understanding coral–symbiont dynamics in the Southwestern Atlantic, particularly in face of global climate changes.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107829"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026049","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":"Characterization and potential risks of microplastics in marine mollusks using the laser direct infrared (LDIR) technique","authors":"Jia Teng ,&nbsp;Shuang Zhao ,&nbsp;Jianmin Zhao ,&nbsp;Dongyu Wang ,&nbsp;Jiashen Li ,&nbsp;Yan Fang ,&nbsp;Qing Wang ,&nbsp;Yuting Zhao","doi":"10.1016/j.marenvres.2026.107871","DOIUrl":"10.1016/j.marenvres.2026.107871","url":null,"abstract":"<div><div>Microplastics (MPs) pollution in marine environments is a growing concern, especially where mollusks for human consumption are harvested. This study investigated the contamination and potential risks of MPs in mollusks collected from the Yantai coastal waters using Laser Direct Infrared (LDIR) imaging. The average MPs abundance was 7.55 ± 4.87 items/g (w.w.) in mollusks soft tissues. The carnivorous <em>Buccinum undatum</em> exhibited the highest MP load, likely due to biomagnification. Spearman correlation analysis revealed a negative relationship between MPs abundance and mollusk biological traits, suggesting that larger individuals have lower concentrations. Fibers (52.63 %) and small particles &lt;50 μm (76.19 %) dominated the composition and polyethylene was the most common polymer. The Polymer Hazard Index (PHI) value of 2115 indicated a high risk level (V). The estimated average annual MP intake from mollusk consumption was 24,680 particles/person/year, highlighting potential health concerns. This study provides crucial data for understanding MP pollution in mollusks and its potential risks.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"216 ","pages":"Article 107871"},"PeriodicalIF":3.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026050","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}