Marine pollution bulletin最新文献

{"title":"Microplastic and biogeochemical releases from plastic, metal, cement, and fiber coastal restoration materials","authors":"Lisa G. Chambers ,&nbsp;Sara Gay ,&nbsp;Naija Cheek ,&nbsp;Cadie Barnes ,&nbsp;Megan Jensik ,&nbsp;Melinda Donnelly ,&nbsp;Paul E. Sacks ,&nbsp;Melanie Beazley ,&nbsp;Linda J. Walters","doi":"10.1016/j.marpolbul.2026.119329","DOIUrl":"10.1016/j.marpolbul.2026.119329","url":null,"abstract":"<div><div>Coastal areas often include ecologically sensitive habitats and dense human populations, which can contribute to ecosystem degradation and the need for coastal restoration. Typically, coastal restoration requires the placement of a foreign material to serve as a base substrate or shoreline stabilizer, but the potential for these materials to contribute to plastic pollution or impact biogeochemical cycles is not well understood. This research investigated common coastal restoration materials to address two key knowledge gaps, 1) can plastic restoration materials be a source of microplastics?, and 2) can alternative restoration materials release nutrients, metals, or alter microbial respiration? Two polyethylene plastics and five non-plastic alternative materials were studied in experimental laboratory microcosms, including a one-year incubation to quantify microplastic release, a 5-week nutrient and metal release study of fresh and post field-deployed materials, and a one-week respiration (CO₂ production) incubation with site sediment and water. Laboratory results indicated the two plastics studied released microplastics at a rate of 395 ± 100 and 158 ± 56 g⁻¹ y⁻¹, for Naltex® and Vexar®, respectively. Jute, made of plant fiber, released 4.7 and 37 times more dissolved inorganic nitrogen and soluble reactive phosphorus, respectively, than the control. The biopolymer, BESE-elements®, released 60 and 32 times more dissolved organic carbon and CO₂-C, respectively, than the control. Fresh galvanized metal gabion wire released iron, manganese, lead, and 28 times more zinc than the control, while cement materials showed minimal effects. Restoration practitioners, resource managers, and permitting organizations should consider microplastic and biogeochemical impacts when choosing materials.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119329"},"PeriodicalIF":4.9,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081211","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":"Occurrence, air-seawater exchange, and ecological risk of pesticides in the southern Bohai Sea, China","authors":"Cunxin Zhang ,&nbsp;Yanqing Sun ,&nbsp;Xiang Yu ,&nbsp;Jingjing Luo ,&nbsp;Yuzhu Ding ,&nbsp;Wei Chen ,&nbsp;Yongchun Liu ,&nbsp;Qingkui Cui ,&nbsp;Lihua Ren ,&nbsp;Yingjiang Xu","doi":"10.1016/j.marpolbul.2026.119332","DOIUrl":"10.1016/j.marpolbul.2026.119332","url":null,"abstract":"<div><div>Pesticides are extensively produced and used worldwide, leading to their dispersal into the environment. To enhance the understanding of the occurrence, migration, and transformation of pesticides, the present study collected inshore seawater, estuarine, and atmospheric samples in May 2024 along the southern Bohai Sea to measure the concentrations of 221 pesticide residues. As a result, 11, 17, and 15 pesticides were frequently detected in inshore seawater, estuaries, and the atmosphere. The abundance of pesticides in the seawater, estuaries, and atmosphere samples ranged from 1.0 to 9.4 ng/L,12.3 to 57.8 ng/L, and 1.6 to 6.8 ng/m³, respectively; representing medium pollution levels compared to global counterparts in similar environmental matrices. Spatially, the regional pollution levels of ∑₁₁Pesticides in seawater showed that LB was significantly greater than BB, YR and MW. Moreover, spatial trends analysis in estuary and seawater concentrations showed a substantial level reduction from the inshore towards the offshore. This indicates that riverine input is a significant source of pesticides in the marine environment. The fugacity ratios (FR) and fluxes of air-seawater exchange indicate that estuaries are a minor source of most pesticide emissions to the atmosphere. In the coastal seawater, ecological risks from the detected pesticides were generally low, with permethrin being the only exception that exceeded a level of potential concern.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119332"},"PeriodicalIF":4.9,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081208","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":"Benthic–pelagic interactions and algal-derived organic matter dynamics along the East Siberian Sea slope revealed by fluorescence and isotope tracers","authors":"Silpa Mathew ,&nbsp;Jong Kuk Hong ,&nbsp;Tae Siek Rhee ,&nbsp;Kyung-Hoon Shin ,&nbsp;Seeryang Seong ,&nbsp;Ji-Hoon Kim ,&nbsp;Meilian Chen ,&nbsp;Jin Hur","doi":"10.1016/j.marpolbul.2026.119334","DOIUrl":"10.1016/j.marpolbul.2026.119334","url":null,"abstract":"<div><div>The Arctic Ocean is undergoing rapid transformation driven by climate change, including declining sea-ice cover and increasing freshwater inputs, with profound consequences for carbon and nutrient cycling. The East Siberian Sea (ESS), one of the largest Arctic shelf systems, plays a central role in linking terrestrial inputs, primary production, and deep-ocean carbon export. In this study, we combined fluorescence spectroscopy with stable isotope and bulk chemical analyses to examine dissolved organic matter (DOM) dynamics along a shelf-slope transect of the ESS. Our results show that slope-associated sedimentary processes exert a strong control on DOM redistribution and transformation. Enhanced algal production across the Russian Arctic increasingly contributes to organic matter transport toward slope regions. Elevated chlorophyll-a concentrations in waters, together with a pronounced enrichment of protein-like fluorescent DOM (C3), point to strong algal inputs to the continental slope. At mid-slope stations (200–900 m), co-enrichment of dissolved and particulate organic carbon with heavier δ¹⁵N signatures suggests intensified microbial remineralization and nitrogen cycling, likely stimulated by sediment resuspension under Atlantic Water influence. These findings highlight the ESS slope as a dynamic benthic–pelagic interface where sedimentary processes reshape DOM composition and act as an important pathway for the supply of bioavailable carbon and nitrogen to the Arctic Ocean interior. Overall, this study highlights the continental slope as an active regulator of Arctic DOM cycling under ongoing Atlantification and sea-ice decline.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119334"},"PeriodicalIF":4.9,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081210","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":"Corrigendum to “Influence of wastewater discharge from dredging mariculture pond sediments on the food sources of two intertidal crab species” [Mar. Pollut. Bull. 199 (2024) 115992]","authors":"Limei Xie, Shunyang Chen, Zhiqiang Wu, Zhiyong Xue, Yong Ye, Bin Chen, Jiahui Chen, Guangcheng Chen","doi":"10.1016/j.marpolbul.2026.119352","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2026.119352","url":null,"abstract":"","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"23 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089706","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 risk-based modelling approach to predict human error-induced oil pollution accident in bunker transferring operation","authors":"Emre Akyuz ,&nbsp;Selcuk Cebi ,&nbsp;Sukru Ilke Sezer","doi":"10.1016/j.marpolbul.2026.119316","DOIUrl":"10.1016/j.marpolbul.2026.119316","url":null,"abstract":"<div><div>Risk of oil pollution during bunker transfer operation remains a significant threat to marine ecosystems and safety as human error being a major contributing factor. This article proposes probabilistic risk modelling framework integrating Dempster–Shafer evidence theory (D-S), Cognitive Reliability and Error Analysis Method (CREAM) and Fault Tree Analysis (FTA) to quantify human error-induced bunker pollution accident in maritime transport. Since DS-CREAM approach is applied to capture epistemic uncertainty and quantification of human error probability incorporating evidence-based reasoning and context-dependent performance shaping factors (PSFs), FT performs probabilistic risk modelling for oil pollution accident. The findings show that occurrence probability of TE (Oil pollution accident risk on-board bunker transfer operation) is found 1.566E-01. Beside its robust theoretical background, the findings of the research will contribute safety and marine environment researchers, professionals, ship crew and superintendents for minimising oil pollution risk and enhancing operational safety during ship to ship bunker transfer operation. The proposed modelling will also provide a robust decision-support tool for risk management and oil pollution prevention in maritime bunker transfer operations.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119316"},"PeriodicalIF":4.9,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081074","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":"Stable isotopes δD–H2O, δ18O–H2O, δ15N–NO3−, δ18O–NO3− and hydrochemistry of the volcanic catchments and the influence of continental runoff on the environment of Eastern Kamchatka","authors":"Pavel Semkin ,&nbsp;Galina Pavlova ,&nbsp;Shan Jiang ,&nbsp;Olga Ulanova ,&nbsp;Yuri Barabanshchikov ,&nbsp;Maria Shvetsova ,&nbsp;Anna Kozachek ,&nbsp;Yi Xu ,&nbsp;Jing Zhang ,&nbsp;Vyacheslav Lobanov","doi":"10.1016/j.marpolbul.2026.119323","DOIUrl":"10.1016/j.marpolbul.2026.119323","url":null,"abstract":"<div><div>Volcanic catchments and coastal areas near active volcanoes have specific ecosystems in many regions of the world primarily because of availability of nutrients (N, P, Si) and trace elements supplied from volcanism. Isotopic (δD–H₂O, δ¹⁸O–H₂O, δ¹⁵N–<span><math><msubsup><mi>NO</mi><mn>3</mn><mo>−</mo></msubsup></math></span>, δ¹⁸O–<span><math><msubsup><mi>NO</mi><mn>3</mn><mo>−</mo></msubsup></math></span>) and hydrochemical data from eight different rivers and results of three cruises on both sides of the Kamchatka Peninsula held from 2022 to 2025 together with satellite data of chlorophyll “a” concentration are discussed in this article. Unlike other volcanic regions of the world, the Eastern Kamchatka catchments have a lengthy spring-summer flooding as a result of snow melting. Seasonal effect of dilution in coastal Pacific waters is identified at the depths of up to 500 m and at the distances of &gt;150 km from the shore line. In the period of increasing discharge of volcanic rivers of Eastern Kamchatka, concentrations of DIN and DIP nutrients systematically increase because accumulation in the snow is observed during volcanism. As a result, with spring-summer stratification of coastal Pacific waters, phytoplankton blooms occur from May to July and this is having good correlation with the period of high-water discharge of the rivers. Next bloom stage, which often involves the harmful dinoflagellates and sometimes large-scale “red tides”, occurs in September/October. Our hypothesis for this bloom stage is significant increase of DIN/DIP ratio in years with hot summer. This occurs due to increased concentrations of DIN in the snow near the top of volcanos, which accumulates during the previous winter due to volcanic exhalations. It is explained that snow melting process at the highlands supply additional DIN to the coastal part of the Pacific Ocean. Thus, the most intense phytoplankton bloom in the adjacent part of the Pacific Ocean should be expected in the years with both a large amount of snow in the previous winter and sufficiently high air temperatures in summer for intense snow melting in the highlands and the formation of stratification of the coastal Pacific waters.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119323"},"PeriodicalIF":4.9,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072625","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":"Bioaccumulation of trace metals in the invasive bivalve Mytella strigata (Hanley, 1843) from estuarine and backwater ecosystems of South India","authors":"Shirin Shihab ,&nbsp;P.R. Divya ,&nbsp;S. Kumaresan ,&nbsp;T.T. Ajith Kumar","doi":"10.1016/j.marpolbul.2026.119314","DOIUrl":"10.1016/j.marpolbul.2026.119314","url":null,"abstract":"<div><div>Indian backwaters are the most favourable habitats for a diverse group of molluscan species, particularly bivalves and gastropods. With the increasing demand of bivalves for food, there would always be a concern on its safety and hence, it necessitates the regular assessment of the contaminants for human consumption. Considering this fact, the present study is intended to assess the level of heavy metal accumulation in the exotic bivalve <em>Mytella strigata</em>, which is found in three backwater regions of South India, as a baseline study of the first of its kind. As filter feeders, mussels are vulnerable to aquatic pollution and are known to accumulate pronounced concentrations of heavy metals in their tissues. This study evaluated the spatial distributions of heavy metals Cu, Mn, Ni, Zn, As, Pb, Hg, and Cd in the tissue samples of <em>Mytella strigata</em>. Samples were analysed using standard protocols and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The Metal Pollution Index (MPI) was calculated for the samples collected from Ashtamudi, Vembanad, and Vellar estuarine regions; the results were 3.80, 6.08, and 5.38, respectively. The Pollution Load Index and Contamination Factor of the study areas indicated an alarmingly high level of contamination. In comparison, the results obtained in this study with the results of previous reports of the other bivalve species (<em>Perna viridis</em>) from the studied locations, it was noticed that this exotic species exhibited high level of contamination. Therefore, a comprehensive monitoring approach is needed for this particular species to ensure its safety for consumption.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119314"},"PeriodicalIF":4.9,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072626","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":"Marine oil film detection method based on growing hierarchical neural gas network and multi-scale threshold segmentation","authors":"Baozhu Jia ,&nbsp;Zekun Guo ,&nbsp;Jin Xu ,&nbsp;Bo Li ,&nbsp;Yuanyuan Huang ,&nbsp;Min Cheng ,&nbsp;Bo Xu ,&nbsp;Boxi Yao ,&nbsp;Peng Liu","doi":"10.1016/j.marpolbul.2026.119337","DOIUrl":"10.1016/j.marpolbul.2026.119337","url":null,"abstract":"<div><div>The increasement of offshore oil extraction and transportation has brought increasingly severe oil spill risks, seriously endangering the marine ecological environment. Therefore, it is urgent to develop advanced and reliable oil film monitoring technology. An oil film detection method is proposed based on the Growing Hierarchical Neural Gas Network (GHNG) and multi-scale threshold segmentation to address the problem of weak oil film region features and severe environmental noise interference in marine radar images. This method first utilizes the unsupervised learning characteristics of GHNG network to perform dynamic topology learning and hierarchical clustering on preprocessed radar images, effectively distinguishing oil film regions from background interference. Subsequently, a multi-scale adaptive threshold segmentation technique was adopted to accurately extract oil film targets by fusing local thresholds from different scales and neighborhoods. Finally, the final segmentation result is obtained through noise filtering and coordinate transformation. The experimental results indicate that the proposed method provides an effective technical solution for automatic and precise monitoring of marine oil films under complex sea conditions.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119337"},"PeriodicalIF":4.9,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146071831","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":"Fate of deep methane bubble plumes at the Haima cold seeps in the South China Sea","authors":"Binbin Guo ,&nbsp;Danyi Su ,&nbsp;Shengxiong Yang ,&nbsp;Andi Xu ,&nbsp;Xianhai Bu ,&nbsp;Zongheng Chen ,&nbsp;Xuemin Wu ,&nbsp;Qiangqiang Feng ,&nbsp;Chunliang Chen ,&nbsp;Feng Wang ,&nbsp;Yang Wu ,&nbsp;Yifei Dong ,&nbsp;Xi Xiao ,&nbsp;Qianyong Liang","doi":"10.1016/j.marpolbul.2026.119308","DOIUrl":"10.1016/j.marpolbul.2026.119308","url":null,"abstract":"<div><div>Submarine methane seepage constitutes the primary pathway for carbon transfer from Earth's subsurface to the ocean. This study investigates the fate of deep methane bubble plumes at the Haima cold seeps (1408–1522 m depth)—the largest active seep area in the South China Sea (SCS)—through integrated field observations and numerical simulations. Methane bubbles, encased by hydrate shells, ascended at velocities of 11.1–33.4 cm/s near the seabed. Local hydrographic conditions generated distinct plume morphologies: a sinuous flare at seep HM01 and an eastward-tilted conical plume at seep HMS18, with maximum observed heights of 797 m and widths of 244 m. Plumes terminated near the hydrate stability zone (HSZ) upper boundary, which oscillated between 580 and 645 m depth due to temperature modulation by mesoscale eddies (vertical amplitude: 32.5 m) and tides (5.6 m). Enhanced currents or weakened eruptions can intermittently suppress plume below this boundary. Nine-month moored current observations constrained the maximum lateral bubble displacement to 727 m. Dissolved methane reached 5.3 μM at seabed vents but declined by 1–2 orders of magnitude within 20–40 m above the vents, demonstrating that high-concentration anomalies due to dissolved-phase emissions were trapped near the seabed by density stratification. Numerical simulations predicted a secondary methane concentration anomaly (1.5 nM increase) at the HSZ upper boundary, resulting from hydrate shell dissociation of big bubbles. This study provides critical insights for designing methane leakage monitoring strategies during natural gas hydrate exploitation in the SCS.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119308"},"PeriodicalIF":4.9,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146071833","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":"Isolation and whole-genome sequencing of antibiotic-resistant bacteria revealed the reservoir for indigenous antibiotic resistance genes in the deepest ocean sediment of the Challenger Deep","authors":"Wenmian Ding ,&nbsp;Yuepeng Wang ,&nbsp;Yuewei Ma ,&nbsp;Ping Chen ,&nbsp;Ji Yang ,&nbsp;Zhiping Song ,&nbsp;Yuguo Wang ,&nbsp;Wenju Zhang ,&nbsp;Xuan Li ,&nbsp;Yanyan Huang ,&nbsp;Peng Nan","doi":"10.1016/j.marpolbul.2025.119206","DOIUrl":"10.1016/j.marpolbul.2025.119206","url":null,"abstract":"<div><div>Understanding the occurrence of antibiotic-resistant bacteria (ARB) and associated antibiotic resistance genes (ARGs) in remote marine environments is crucial for accessing treats of ARG pollution on a border ecological scale. While most studies focused on anthropogenically disturbed settings, the Challenger Deep, as the deepest ocean habitat, offers a unique opportunity to investigate minimally disturbed resistomes. We revived 123 bacterial isolates from the Challenger Deep sediment, assessed their antibiotic susceptibility, and identified their taxonomy via 16S rRNA gene sequencing. Among them, 96 strains (78.0%) were resistant to at least one antibiotic, with high prevalence observed in <em>Halomonas</em>, <em>Idiomarina</em>, <em>Flagellimonas</em>, and <em>Microbacterium</em>. Resistance was most common to ampicillin (73.2%), followed by sulfadiazine (30.1%) and nalidixic acid (4.9%). Untargeted metabolomics identified 359 metabolites in the sediment sample, including 6-aminopenicillanic acid, suggesting local microbial antibiotic production and selective pressure of resistance. Anthropogenic contaminants like nalidixic acid were also detected. Whole-genome sequencing of eight representative ARB strains revealed 77 copies of 26 ARG subtypes, predominantly associated with multidrug resistance and efflux pump mechanisms. Notably, no mobile genetic elements were linked to ARGs, indicating limited horizontal gene transfer. Phylogenetic analyses showed host species specificity of ARGs, independent of geography or environmental context, supporting vertical inheritance from ancestral lineages. This study offers the first culture-based evidence of ARB and ARGs in the Challenger Deep, suggesting that resistance may represent an adaptive trait to extreme conditions and underscoring its ancient, intrinsic origin. Our findings provide critical implications for understanding the revolution and dissemination of resistance in deep-sea environments.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"226 ","pages":"Article 119206"},"PeriodicalIF":4.9,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072629","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}