环境科学与生态学最新文献

{"title":"Vertical distribution of targeted, suspected, and non-targeted organophosphate esters in sediment core from the East China Sea.","authors":"Meixi Fan, Langjie Ye, Miaolei Ya, Guanyong Su","doi":"10.1016/j.marpolbul.2025.118529","DOIUrl":"10.1016/j.marpolbul.2025.118529","url":null,"abstract":"<p><p>Organophosphate esters (OPEs), including triesters (OPTEs) and diesters (OPDEs), are widely used as flame retardants and plasticizers, but the vertical distribution of OPEs in marine sediments remains largely unexplored. To address this, we developed an effective strategy for target, suspect, and non-target screening of OPTEs and OPDEs with ultrahigh-performance liquid chromatography-Q Exactive hybrid quadrupole-Orbitrap high-resolution mass spectrometry (UHPLC-Q-Orbitrap HRMS). This study reports 17 OPTEs and 10 OPDEs, including five OPTEs and six OPDEs that were detected for the first time in sediment cores from the East China Sea. Through the target screening detected 10 OPTEs from 27 tested and 5 OPDEs from 10 tested. Suspect screening identified 7 OPTEs and 5 OPDEs. Priority OPEs, including tributyl phosphate (TnBP), tris(2-butoxyethyl) phosphate (TBOEP), and bis(2-ethylhexyl) hydrogen phosphate (BEHP), were frequently detected (up to 97 %). The total concentration of OPTEs significantly decreased with sediment depth (r = -0.7376, p < 0.0001), suggesting surface inputs, whereas OPDEs showed no such trend (r = -0.0610, p = 0.7444). Certain priority compounds, such as tricresyl phosphate (TCrP) and diphenyl phosphate (DPHP), shown rapid environmental input, with short doubling times of 6.4 and 6.8 years, respectively.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"118529"},"PeriodicalIF":4.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144804412","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":"Microplastic polymer accumulation, distribution, and toxicity in sediment of a freshwater tidal marsh, USA.","authors":"Jutamas Bussarakum, Patrick J Drohan, Raymond G Najjar, Jill M Arriola, Lisa A Emili, Nathaniel R Warner","doi":"10.1016/j.marpolbul.2025.118566","DOIUrl":"10.1016/j.marpolbul.2025.118566","url":null,"abstract":"<p><p>Microplastics (MPs) persistence in the environment leads to exposure to both wildlife and humans, which is a concern globally. However, understanding MP sources, transport pathways, and environmental risks from exposure remains limited in many environments. Identifying polymer types provides crucial information to address this knowledge gap. This study examines MP distribution and polymer composition in sediment from the John Heinz National Wildlife Refuge at Tinicum, PA, USA, a freshwater tidal marsh. We identified 4590 MP particles and 29 polymer types using laser direct infrared spectroscopy across five sediment cores from four sampling sites. The most abundant polymers were polypropylene (PP), polyurethane (PU), and tire rubber. To evaluate toxicity, we focused on six common polymers produced internationally: polyethylene, PP, polyvinyl chloride, polyethylene terephthalate, PU, and polystyrene. MP concentrations, polymer diversity, and risks increased downstream based on the polymer hazard index and potential ecological risk index, indicating environmental danger. We observed higher MP concentrations and risks in recent depositional sediments. Interestingly, MP concentrations in sediment reported from estuaries located across five continents (18 countries) showed no significant differences, suggesting shared sources of contamination in global estuarine sediments. The global MP burial flux was estimated at approximately 0.2 Mt. yr^-1. Our findings highlight that MPs primarily originate from polymers commonly used to produce single-use plastic products, emphasizing the need for stricter waste management and reduction efforts aimed at disposable plastics.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"118566"},"PeriodicalIF":4.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144883146","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":"Microplastic and copper contamination in coastal waters: Accumulation in zooplankton and caged milkfish (Chanos chanos), and metallothionein response in fish.","authors":"Ananda Putri Gita Natasya, Andhika Puspito Nugroho","doi":"10.1016/j.marpolbul.2025.118523","DOIUrl":"10.1016/j.marpolbul.2025.118523","url":null,"abstract":"<p><p>This study investigates anthropogenic pollution in the coastal waters of Tanjung Mas, Semarang, focusing on microplastic and copper concentrations in zooplankton and caged milkfish (Chanos chanos) reared in fixed net cages, as well as metallothionein responses in the fish. Zooplankton, milkfish, and seawater were collected from four stations (T1, T2, T3, and T4) with varying degrees of anthropogenic activity at different times and fish ages, and were analyzed for microplastic abundance, copper concentrations, and metallothionein levels. Microplastics were detected in all environmental and biological matrices, with the highest concentrations found in surface water at Station T1, in zooplankton, and the digestive tracts of milkfish. Black-colored fibers and fragments were the dominant types, suggesting sources such as textile waste, fishing gear, and plastic packaging. Fourier Transform Infrared spectroscopy identified the presence of PETE, PC, EVA, and PVC polymers. Copper concentrations exceeded national water quality standards, with the highest bioaccumulation observed in the gills and digestive tracts of fish, indicating potential toxicological risks. Metallothionein levels varied across fish tissues, with the highest levels found in the digestive tract, and correlated positively with Cu concentrations, indicating a metal-induced stress response. No significant relationship was found between fish age and the accumulation of microplastics or metallothionein, suggesting that environmental exposure was the primary factor. These findings highlight the potential of C. chanos as a bioindicator species for monitoring coastal pollution, providing a scientific basis for the development of targeted management and mitigation strategies.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"118523"},"PeriodicalIF":4.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144804411","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":"Performance of heavy metals in the intertidal zone surface sediments of the Yellow River Estuary under water-sediment regulation scheme.","authors":"Shan Shan Liu, Jin Ming Song, Xue Gang Li, Hua Mao Yuan, Li Qin Duan, Jun Ma, Feng Min Pan, Jian Wei Xing, Chen Long Feng, De Tong Tian, Zhi Bo Wang, Rui Wang","doi":"10.1016/j.marpolbul.2025.118592","DOIUrl":"10.1016/j.marpolbul.2025.118592","url":null,"abstract":"<p><p>This study investigates the distribution, sources, and ecological risks of heavy metals (Cr, Cu, Zn, Cd, Pb, and Hg) and metalloid (As) in surface sediments of the Yellow River Estuary intertidal zone during the 2023 water-sediment regulation scheme (WSRS) period (summer) and the non-WSRS period (autumn). The results revealed that metal accumulation in both periods was primarily controlled by the co-adsorption of organic matter and fine particles. Hydrodynamic enhancement during the WSRS period reduced metal accumulation through sediment flushing and dilution, whereas weakened flows in the non-WSRS period promoted metal buildup. Assessment based on the geo-accumulation index (I_geo) and ecological risk index (RI) showed low risks for Cr, Cu, Zn, As, and Pb, while Cd and Hg posed moderate risks. Overall, the ecological risks in the study area remained within a low-risk range. The study highlights WSRS influences on heavy metal behavior and provides a basis for estuarine pollution assessment.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"118592"},"PeriodicalIF":4.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144873909","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":"Combined effects of high-fat diet feeding and Streptococcus agalactiae infection on lipid metabolism, antioxidant status, and immune response in tilapia (Oreochromis niloticus).","authors":"Rui Jia, Yiran Hou, Linjun Zhou, Chengfeng Zhang, Bing Li, Jian Zhu","doi":"10.1016/j.cbpc.2025.110321","DOIUrl":"10.1016/j.cbpc.2025.110321","url":null,"abstract":"<p><p>High-fat diet (HFD) and Streptococcus agalactiae are common pathogenic factors affecting tilapia health, yet their combined effects and underlying mechanisms are not well understood. To address this, we conducted a comprehensive evaluation of the potential response mechanisms in tilapia subjected to both factors. Tilapia were fed normal (NC) or high-fat diet (HFD) for 90 days, then challenged with S. agalactiae. At 48 h post-infection, blood, liver, and spleen samples were collected for biochemical parameter analysis and gene expression profiling. The results indicated that the combined treatment upregulated the expression of peroxisome proliferator-activated receptor α (pparα) and fatty acid transport protein 1 (fatp1). Concurrently, it increased 3-hydroxy-3-methylglutaryl-CoA reductase (hmgcr) expression, while decreasing cholesterol 7α-hydroxylase (cyp7a1) expression compared to HFD alone. Antioxidant status analysis revealed that the combined treatment decreased glutathione (GSH) content, total antioxidant capacity (T-AOC), and mRNA levels of nuclear factor erythroid 2-related factor 2 (nrf2), NAD(P)H quinone dehydrogenase 1 (nqo1), and glutathione peroxidase 3 (gpx3). Intriguingly, while both individual stressors upregulated inflammatory and immune-related genes, their combination suppressed interleukin-1β (il-1β), il-8, and immunoglobulin M (igm) expression compared to infection alone. The apoptotic response triggered by S. agalactiae infection, characterized by elevated caspase-3 (cas3), cas9, and cytochrome c (cytc), was inhibited in the liver of combined treatment group. Moreover, all experimental groups showed elevated expression of endoplasmic reticulum stress-related genes: inositol-requiring enzyme 1 (ire1), eukaryotic translation initiation factor 2 alpha kinase 3 (eif2ak3), activating transcription factor 6 (atf6), and binding immunoglobulin protein (bip). These findings collectively demonstrated that HFD exacerbated the pathogenic effects of S. agalactiae through multiple mechanisms, including metabolic dysregulation, oxidative stress potentiation, and complex immunomodulation. Furthermore, the Nrf2 and NF-kB signaling pathways may be implicated in mediating these adverse effects.</p>","PeriodicalId":10602,"journal":{"name":"Comparative Biochemistry and Physiology C-toxicology & Pharmacology","volume":" ","pages":"110321"},"PeriodicalIF":4.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144811914","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":"Mitochondrial function and energy metabolism response of Megalobrama amblycephala under heat and hypoxia.","authors":"Kang Chen, Zheng He, Peiyu Xie, Yihui Jia, Hong Liu, Zexia Gao, Huanling Wang","doi":"10.1016/j.cbpc.2025.110306","DOIUrl":"10.1016/j.cbpc.2025.110306","url":null,"abstract":"<p><p>Ongoing global climate change and anthropogenic activities are increasingly subjecting aquatic animals to heat and hypoxia stress. These environmental perturbations can profoundly impact mitochondrial function and energy metabolism. The current study aimed to delineate the adaptive mechanisms of mitochondrial dynamics and energy metabolism in the blunt snout bream (Megalobrama amblycephala) under three experimental conditions: heat stress (HT group, 35 °C of temperature), hypoxia stress (LO group, 2 mg/L of dissolved oxygen), and combined heat plus hypoxia stress (HL group, 35 °C and 2 mg/L). The results demonstrated that heat and/or hypoxia stresses damaged mitochondrial structure and disrupted fusion-fission balance. The activities of key TCA cycle enzymes (e.g. SDH, CS) were significantly decreased. Conversely, energy metabolism was regulated through an increased AMP/ATP ratio and activation of AMPKα1/AMPKα2 proteins. The expression of glycolytic enzymes (PK, PFK, HK and LDH) was up-regulated. However, heat and/or hypoxia stresses resulted in severe consumption of serum glucose and liver glycogen, with the most pronounced consumption in the HL group. Other saccharides such as mannose and lactose were also significantly reduced in HT and HL groups. The decomposition and metabolism of amino acids was an important auxiliary mechanism. Regarding lipid metabolism, the expression of lipolysis and lipogenesis related genes was down-regulated, while glycerophospholipids accumulation contributed to maintaining membrane integrity. These findings benefit the understanding of environmental adaptive characteristics in aquatic animals and provide effective strategies for aquaculture management.</p>","PeriodicalId":10602,"journal":{"name":"Comparative Biochemistry and Physiology C-toxicology & Pharmacology","volume":" ","pages":"110306"},"PeriodicalIF":4.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144788452","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":"Human mitochondrial CYP2E1-mediated styrene metabolism increases oxidative stress and impairs antioxidant rescue in Caenorhabditis elegans.","authors":"Amanda Ameyaa-Sakyi, Todd R Harris, Colleen E Clarke, David R McMullin, Kacy L Gordon, David Sherwood, Jessica H Hartman, Amy A Rand","doi":"10.1016/j.cbpc.2025.110319","DOIUrl":"10.1016/j.cbpc.2025.110319","url":null,"abstract":"<p><p>Styrene is an environmental toxicant metabolized by cytochrome P450 2E1 (CYP2E1) to styrene oxide, a reactive intermediate product linked to oxidative stress. While the role of CYP2E1 in xenobiotic metabolism is well established, the influence of subcellular enzyme localization on styrene-induced toxicity remains unclear. This study used transgenic Caenorhabditis elegans (C. elegans) strains expressing CYP2E1 in different compartments, mitochondrial-derived (mtCYP2E1) and endoplasmic reticulum-derived (erCYP2E1), to investigate the impact of CYP2E1-mediated styrene metabolism on survival and oxidative stress. CYP2E1 containing C. elegans strains were also compared to a wildtype strain (N2) lacking CYP2E1. Styrene exposure significantly decreased survival across all strains. Antioxidant rescue assays revealed that Trolox and N-acetyl cysteine (NAC) improved survival in the N2 and erCYP2E1 C. elegans strains but not in mtCYP2E1, indicating a distinct oxidative stress mechanism in mitochondrial CYP2E1 metabolism. Fluorescent microscopy confirmed that ROS levels increased with styrene exposure, particularly in mtCYP2E1 C. elegans, where ROS levels were up to two-fold higher than in other strains. GC-MS analysis detected elevated styrene glycol production in styrene-exposed mtCYP2E1 C. elegans relative to N2 and erCYP2E1 strains. Given styrene oxide is a known cytotoxic intermediate, its accumulation in the mtCYP2E1 strain likely contributes to the observed oxidative stress and decreased survival. These findings suggest that CYP2E1 subcellular localization influences styrene metabolism and toxicity, with mitochondrial CYP2E1 potentially promoting higher oxidative stress and reduced detoxification efficiency. A better understanding of these mechanisms could provide insight into xenobiotic metabolism, environmental toxicology, and disease pathogenesis associated with CYP2E1-mediated oxidative stress.</p>","PeriodicalId":10602,"journal":{"name":"Comparative Biochemistry and Physiology C-toxicology & Pharmacology","volume":" ","pages":"110319"},"PeriodicalIF":4.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144803825","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":"YOLO11-YX: An efficient algorithm for marine debris target detection.","authors":"Yuxin Wang, Shuo Liu, Yansong He, Yongxin Zhang","doi":"10.1016/j.marpolbul.2025.118511","DOIUrl":"10.1016/j.marpolbul.2025.118511","url":null,"abstract":"<p><p>The escalating issue of marine debris pollution has positioned automated detection as a pivotal technology in combating this environmental challenge. Traditional object detection methodologies, however, often grapple with limitations in accuracy and robustness, particularly in complex backgrounds and with small objects. Addressing these limitations, this paper introduces YOLO11-YX, an enhanced algorithm derived from YOLO11s, integrating three novel modules: the SDown downsampling module, the C3SE feature extraction module, and the FAN feature fusion module. The SDown module amalgamates feature information from various image regions during downsampling, effectively reducing data dimensionality and computational complexity while preserving intricate details. The C3SE module refines the conventional YOLO architecture by streamlining the convolutional structure and embedding SENet, thereby ameliorating the redundancy in multi-layer bottlenecks and bolstering detection efficacy in intricate environments. The FAN module augments the network's capacity to discern image details and contextual information at its terminus, accentuating the features of diminutive targets and elevating detection precision. Empirical results demonstrate that YOLO11-YX surpasses YOLO11s by achieving a 2.44% enhancement in detection accuracy for marine debris, culminating in a 62.32% accuracy rate. This advancement furnishes a potent and dependable solution for the automated detection of marine debris, heralding extensive applicability.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"118511"},"PeriodicalIF":4.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144804413","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":"Floating plastics as a vector for range expansion: First record of Lepas (Lepas) pectinata Spengler, 1793 (Cirripedia: Lepadidae) in Turkish waters (Eastern Mediterranean).","authors":"Cem Çevik, Tahir Özcan, Sedat Gündoğdu, Ertan Dağlı","doi":"10.1016/j.marpolbul.2025.118550","DOIUrl":"10.1016/j.marpolbul.2025.118550","url":null,"abstract":"<p><p>This study reports the first record of the goose barnacle Lepas (Lepas) pectinata Spengler, 1793 (Cirripedia: Lepadidae) in Turkish waters, specifically the northeastern part of the Mediterranean Sea. Specimens were collected from a floating plastic bag and metal beverage cans approximately 1-2 nautical miles off the coast of the Gulf of Mersin during a marine litter survey conducted on 28 January 2025. A total of twelve L. pectinata individuals were identified adhering to the surface of a high-density polyethylene plastic bag of domestic origin. The collected material was examined using stereomicroscopy and identified in accordance with morphological characteristics described in the original taxonomic literature. The presence of L. pectinata, a pelagic barnacle species typically associated with floating substrates in tropical and warm-temperate oceans, suggests its potential for long-distance dispersal facilitated by anthropogenic marine litter. Prior to this study, only three lepadid barnacle species had been documented in Turkish waters: Lepas anatifera, Scalpellum scalpellum, and Octolasmis angulata. The present finding increases the known Lepadidae diversity in the region to four species. This record also underscores the ecological role of buoyant plastic debris as novel artificial habitats and vectors for species distribution in marine ecosystems. Such substrates may serve as vehicles for both native and non-native species, thereby contributing to changes in biogeographical patterns and the potential introduction of alien taxa. Continued monitoring of floating debris and associated biota is essential for understanding species dispersal dynamics and the broader ecological implications of marine plastic pollution.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"118550"},"PeriodicalIF":4.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144812214","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":"Decreasing mercury concentrations in beaks of the giant warty squid Moroteuthopsis longimana in the Scotia Sea (Southern Ocean) since the 1970s.","authors":"Sara Lopes-Santos, José C Xavier, José Abreu, José Seco, João P Coelho, Eduarda Pereira, Richard A Phillips, José P Queirós","doi":"10.1016/j.marpolbul.2025.118578","DOIUrl":"10.1016/j.marpolbul.2025.118578","url":null,"abstract":"<p><p>The giant warty squid Moroteuthopsis longimana is an important prey of top predators in the Southern Ocean. It is therefore a major link in the pathway of contaminants like mercury (Hg) to higher levels in food webs. In this study, we evaluated changes in Hg concentrations in beaks of adult M. longimana collected from the boluses (pellets) of wandering albatross Diomedea exulans chicks at Bird Island (South Georgia) over five decades (1976, 1984, 1995, 2006 and 2016). A steep decrease in Hg concentrations was observed in M. longimana from 1984 to 1995 (0.086 ± 0.021 μg.g^-1 to 0.017 ± 0.013 μg.g^-1), with concentrations remaining low thereafter, likely reflecting the effects of international regulations and the global reductions in Hg emissions and usage initiated in the 1970s. Hg concentrations were not related to the squid size, δ¹⁵N nor δ¹³C values (proxies for trophic position and habitat, respectively), providing no evidence of bioaccumulation nor biomagnification in this squid species. Our results suggest that Hg concentrations in the beaks may be related to Hg bioavailability in the ecosystem, which makes M. longimana a potential biomonitor of Hg concentrations in pelagic environments of the Southern Ocean. However, further investigations are needed to confirm this finding.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"221 ","pages":"118578"},"PeriodicalIF":4.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144873908","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}