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Radiological risk assessment of natural radionuclides in the whitemouth croaker (Micropogonias furnieri Desmarest, 1823) in Brazilian tropical seas 巴西热带海域白口鱼(Micropogonias furnieri Desmarest, 1823)中天然放射性核素的辐射风险评估
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-09 DOI: 10.1016/j.marpolbul.2026.119259
Wagner Pereira, Alphonse Kelecom, José M. Lopes, Cleber B. Espindola, Alessander S. Carmo, Ademir X. Silva
This study assesses the radiological risk to the whitemouth croaker (Micropogonias furnieri Desmarest, 1823) by calculating the dose to biota. Samples were collected, identified, and prepared for analysis from Sepetiba Bay, Rio de Janeiro, Brazil. The activity concentration (AC) results of 238U, 235U, 234U, 232Th, 230Th, 228Th, 228Ra, 226Ra, and 210Pb are expressed in Bq·kg−1. The study highlighted that biota radioprotection does not recommend dose limit concepts due to model boundary conditions, focusing instead on Derived Consideration Reference Levels (DCRL), which are used to screen for potential deleterious effects of ionizing radiation. The radionuclide-specific Dose Coefficient (DoCo) values for the analyzed radionuclides in saltwater fish are presented. The average dose rate found in M. furnieri was 7.72−2 μGy∙d−1. This average dose rate falls within the background range, suggesting no visible biological effects. The research emphasizes the need for radiological risk assessments in tropical regions, which are often underexplored compared to temperate regions. The study calls for broader studies using representative organisms to inform national legislation aimed at protecting biota from radiological risks, ensuring a comprehensive understanding of environmental safety and health.
本研究通过计算对生物群的剂量来评估对白口鱼(Micropogonias furnieri Desmarest, 1823)的辐射风险。样品采集、鉴定并准备在巴西里约热内卢的Sepetiba湾进行分析。238U、235U、234U、232Th、230Th、228Th、228Ra、226Ra和210Pb的活性浓度(AC)结果以Bq·kg−1表示。该研究强调,生物群辐射防护并不推荐基于模型边界条件的剂量限制概念,而是侧重于用于筛选电离辐射潜在有害影响的衍生考虑参考水平(DCRL)。给出了所分析的放射性核素在咸水鱼类中的放射性核素特异性剂量系数(DoCo)值。furnieri的平均剂量率为7.72−2 μGy∙d−1。这一平均剂量率落在本底范围内,表明没有可见的生物效应。这项研究强调了在热带地区进行辐射风险评估的必要性,与温带地区相比,热带地区的探索往往不足。该研究呼吁进行更广泛的研究,利用具有代表性的生物来为旨在保护生物群免受辐射风险的国家立法提供信息,确保全面了解环境安全和健康。
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引用次数: 0
Occurrence characteristics, cross-media behavior, and influencing factors of antibiotics and ARGs in typical rivers around the Bohai Sea 环渤海典型河流抗生素和ARGs的发生特征、跨媒介行为及影响因素
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-09 DOI: 10.1016/j.marpolbul.2026.119322
Hui Gao, Bing Li, Ruijing Li, Yingbin Lou, Xuan Jia, Shuang Zhang, Ziwei Yao
To investigate the cross-media behavior and key drivers of antibiotics and antibiotic resistance genes (ARGs) in typical rivers around the Bohai Rim region, this study analyzed 26 rivers discharging into the Bohai Sea using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) and high-throughput quantitative fluorescence PCR. A total of 36 antibiotics were identified in the water samples and 33 in the sediments, with total concentrations ranging from n.d. to 1515.134 ng/L in water and n.d. to 85.926 ng/g in sediment. Tetracyclines were the dominant antibiotic class in both media. Additionally, 50 types of ARGs were detected in the water and 52 in the sediments, with absolute abundances ranging from n.d. to 1.04 × 105 copies/L in water and up to 2.13 × 105 copies/g in sediment. Gene abundances were generally higher in sediments, with macB and intI1 emerging as the predominant genes. Compared with pre-COVID-19 data, no significant increase in antibiotic concentrations or ARG abundances in the rivers was observed. Furthermore, the findings revealed that ARGs were highly mobile between the water and sediment phases, with non-corresponding antibiotics exerting a notable influence on this movement, while the effects of environmental physicochemical factors appeared minimal. This study provides key scientific insights for developing effective strategies to prevent antibiotic pollution and control the cross-media transmission of ARGs in the Bohai Sea region.
为了研究环渤海地区典型河流中抗生素和抗生素耐药基因(ARGs)的跨媒介行为及其关键驱动因素,本研究采用高效液相色谱-串联质谱(HPLC-MS/MS)和高通量荧光定量PCR技术对26条入渤海河流进行了分析。水样中检出抗生素36种,沉积物中检出抗生素33种,水中总浓度为nd ~ 1515.134 ng/L,沉积物中总浓度为nd ~ 85.926 ng/g。四环素类抗生素在两种培养基中均占主导地位。水体中检测到50种ARGs,沉积物中检测到52种ARGs,水体中绝对丰度为1.04 ~ 1.105 × 105拷贝/L,沉积物中最高为2.13 × 105拷贝/g。基因丰度在沉积物中普遍较高,以macB和intI1为优势基因。与covid -19前的数据相比,河流中抗生素浓度或ARG丰度未见显著增加。此外,研究结果表明,ARGs在水相和沉积物相之间具有高度的流动性,非相应的抗生素对这种移动产生显著影响,而环境理化因素的影响则很小。本研究为制定有效的防治抗生素污染和控制ARGs跨媒介传播的策略提供了重要的科学见解。
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引用次数: 0
Long-range transport of POPs to the central Atlantic Ocean: using a resident population of bottlenose dolphins (Tursiops truncatus) as sentinel species 持久性有机污染物向大西洋中部的远距离迁移:以一个常驻种群的宽吻海豚(Tursiops truncatus)为哨兵物种
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-09 DOI: 10.1016/j.marpolbul.2026.119371
Nara de Oliveira-Ferreira, Lilian Sander Hoffmann, Bárbara M.R. Manhães, Elitieri B. Santos-Neto, Marcelo Merten Cruz, Cristina Araujo Matzenbacher, Haydée Andrade Cunha, Tatiana Lemos Bisi, Alexandre de Freitas Azevedo, Thales Renato Ochotorena de Freitas, José Lailson-Brito
The Saint Peter Saint Paul archipelago (SPSPA) is situated in the central Equatorial Atlantic, approximately 1000 km from the northeastern coast of Brazil. A small population of common bottlenose dolphins (Tursiops truncatus) exhibits strong site fidelity to the remote archipelago. As apex predators, these dolphins can act as sentinels for the transport and bioaccumulation of organohalogen compounds in isolated marine environments. Remote biopsies were collected from nine individuals (n = 9) to investigate pollutant exposure. Blubber samples were analyzed for polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), brominated flame retardants (BFRs), and naturally produced methoxylated organobromines (MeO-BDEs), using gas chromatography coupled with electron capture detection or mass spectrometry. Skin samples were analyzed in an isotopic ratio mass spectrometer. The profile of the chemical markers observed in these bottlenose dolphins was dominated by high molecular weight PCBs and high δ13C, similar to coastal dolphin species. Atmospheric transport, adsorption to benthic substrates, and species-specific metabolic capacity possibly shape contaminant accumulation in this population. Naturally produced MeO-BDEs and carbon ratios suggest low oceanic-coastal dispersal of dolphins. These findings suggest the efficient transport of man-made pollutants to isolated locations and the key role of apex predators, such as bottlenose dolphins, as POPs reservoirs in oceanic zones.
圣彼得圣保罗群岛(SPSPA)位于赤道大西洋中部,距离巴西东北海岸约1000公里。一小群常见的宽吻海豚(Tursiops truncatus)对偏远的群岛表现出强烈的地点保真度。作为顶级捕食者,这些海豚可以在孤立的海洋环境中充当有机卤素化合物运输和生物积累的哨兵。对9人(n = 9)进行了远程活检,以调查污染物暴露情况。采用气相色谱-电子捕获检测或质谱法对鲸脂样品进行多氯联苯(PCBs)、有机氯农药(OCPs)、溴化阻燃剂(BFRs)和天然产生的甲氧基化有机溴(MeO-BDEs)分析。皮肤样品用同位素比质谱仪分析。这些宽吻海豚的化学标记物以高分子量多氯联苯和高δ13C为主,与沿海海豚相似。大气运输、对底栖底物的吸附和物种特有的代谢能力可能形成该种群的污染物积累。自然产生的meo - bde和碳比率表明,海豚的海洋-海岸分散程度较低。这些发现表明,人为污染物可以有效地运输到孤立的地点,以及瓶鼻海豚等顶级捕食者在海洋区域作为持久性有机污染物储存库的关键作用。
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引用次数: 0
Towards sustainable urban estuary health: Modeling microbial pollution sources and mitigation strategies in the Golden Horn 迈向可持续的城市河口健康:模拟金角湾的微生物污染源和缓解策略
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-09 DOI: 10.1016/j.marpolbul.2026.119405
Selin Çelik, Osman İsa Çelik
In support of the United Nations Ocean Decade goals for sustainable pollution reduction and improved ocean health, this study develops a science-based prognostic framework to assess and manage microbial contamination in urban estuarine systems. Taking the heavily urbanized Golden Horn (Istanbul) as a primary study site, a coupled two-dimensional (2D) hydrodynamic–fecal indicator bacteria (FIB) model was developed and rigorously validated using field observations from contrasting dry (December 2022) and wet (April 2023) conditions. Scenario analyses revealed that a theoretical best-case of eliminating FIB inputs from the Alibey and Kağıthane Creeks and a localized shoreline point source produces near-complete reductions in microbial concentrations, with this idealized zero-load scenario suggesting that ‘excellent’ bathing water quality standards could theoretically be achieved within approximately 15 days. Conversely, increasing seawater inflow—a strategy often proposed to enhance circulation—did not improve microbial conditions and, under wet-weather scenarios, resulted in further contamination. These findings suggest that source control serves as a more fundamental requirement than hydrodynamic manipulation for restoring microbial water quality in semi-enclosed urban estuaries. By integrating transferable modeling methods with actionable management guidance, this study contributes to global efforts towards sustainable estuarine health and pollution mitigation.
为了支持联合国海洋十年关于可持续减少污染和改善海洋健康的目标,本研究开发了一个基于科学的预测框架,以评估和管理城市河口系统中的微生物污染。以高度城市化的金角(伊斯坦布尔)为主要研究地点,建立了一个耦合二维(2D)水动力-粪便指示细菌(FIB)模型,并通过对比干燥(2022年12月)和潮湿(2023年4月)条件的现场观测进行了严格验证。情景分析显示,理论上最好的情况是消除Alibey和Kağıthane小溪以及局部海岸线点源的FIB输入,可以几乎完全减少微生物浓度,这种理想的零负荷情景表明,理论上可以在大约15天内达到“优秀”的洗澡水质标准。相反,增加海水流入——一种经常被提出的加强循环的策略——并不能改善微生物的条件,而且在潮湿的天气情况下,会导致进一步的污染。这些发现表明,在半封闭的城市河口恢复微生物水质时,源控制比水动力控制更重要。通过将可转移的建模方法与可操作的管理指导相结合,本研究有助于实现可持续河口健康和减轻污染的全球努力。
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引用次数: 0
The reliability gap: Why high predictive accuracy doesn't guarantee stable feature importance. 可靠性差距:为什么高预测精度不能保证稳定的特征重要性。
IF 4.9 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-07 DOI: 10.1016/j.marpolbul.2026.119398
Yoshiyasu Takefuji

Marine Pollution Bulletin increasingly applies machine learning and explainable AI to pollutant and shellfish poisoning risk, exemplified by PCA-based source apportionment and SHAP-based feature attribution. However, linear PCA may misrepresent structure in inherently nonlinear environmental data, and existing studies often treat model-derived feature importances as evidence of true associations without assessing consistency or dose-response relationships. This paper clarifies that supervised models possess two distinct accuracies: prediction and feature importance, and only prediction can be validated against ground truth. Using a Basque coastal dataset (8195 instances, 14 features) with chlorophyll-a as a proxy for paralytic shellfish poisoning risk, we introduce a leave-top1-out procedure to test ranking stability. Random Forest and XGBoost with and without SHAP show pronounced instability, indicating biased, model-dependent importances. In contrast, unsupervised and non-target-prediction methods yield perfectly stable rankings while matching or exceeding supervised performance, supporting routine stability, consistency, dose-response, and linearity checks in environmental ML studies.

《海洋污染公报》越来越多地将机器学习和可解释的人工智能应用于污染物和贝类中毒风险,例如基于pca的来源分配和基于shap的特征归因。然而,线性PCA可能会歪曲固有非线性环境数据的结构,并且现有的研究通常将模型派生的特征重要性作为真实关联的证据,而不评估一致性或剂量-反应关系。本文阐明了监督模型具有两种不同的精度:预测和特征重要性,并且只有预测才能根据真实情况进行验证。使用巴斯克沿海数据集(8195个实例,14个特征),叶绿素-a作为麻痹性贝类中毒风险的代理,我们引入了一个leave-top -out程序来测试排名的稳定性。随机森林和XGBoost有和没有SHAP显示明显的不稳定性,表明有偏倚的,模型依赖的重要性。相比之下,无监督和非目标预测方法在匹配或超过监督性能的同时产生完全稳定的排名,支持环境ML研究中的常规稳定性、一致性、剂量-反应和线性检查。
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引用次数: 0
Unraveling the ecological impact of textile microfibers: Current knowledge and research challenges 揭示纺织微纤维的生态影响:当前的知识和研究挑战
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-06 DOI: 10.1016/j.marpolbul.2026.119358
Khawla Chouchene, Ana L. Patrício Silva, Ana Costa, Andréa Marinho, Armando C. Duarte, Teresa Rocha-Santos, João P. da Costa
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引用次数: 0
Distribution and transport of trace organic contaminants from land to the coastal sea 微量有机污染物从陆地到沿海海洋的分布和运输
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-06 DOI: 10.1016/j.marpolbul.2026.119364
Shi-Jie Lv, Ting Pan, Rui Tang, Jun-Rong Liang, Hui He, Lei Mai
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引用次数: 0
Plastic clean-up mechanisms: Experimental insights on their bycatch 塑料清理机制:对其副捕获物的实验见解
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-06 DOI: 10.1016/j.marpolbul.2026.119326
Giulia Leone, Ana I. Catarino, Ine Pauwels, Mattias Bossaer, Regine Conda Oco, Chia-Yu Chu, Peter Troch, Peter L.M. Goethals, Gert Everaert
{"title":"Plastic clean-up mechanisms: Experimental insights on their bycatch","authors":"Giulia Leone, Ana I. Catarino, Ine Pauwels, Mattias Bossaer, Regine Conda Oco, Chia-Yu Chu, Peter Troch, Peter L.M. Goethals, Gert Everaert","doi":"10.1016/j.marpolbul.2026.119326","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2026.119326","url":null,"abstract":"","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"90 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134963","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}
引用次数: 0
Reproductive performance and propagule pressure: Key drivers of Rugulopteryx okamurae (Ochrophyta, Dictyotales) invasion of a Posidonia oceanica meadow 繁殖性能和繁殖压力:冈村红鸟入侵Posidonia oceanica草甸的关键驱动因素
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-06 DOI: 10.1016/j.marpolbul.2026.119383
Jesús Rosas-Guerrero, Raquel Carmona, Julio De la Rosa, Marianela Zanolla, María Altamirano
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引用次数: 0
Attenuation of antibiotics and endocrine disruptors flux along the Land-To-Sea continuum: Dominant role of terrestrial ecosystems and remediation potential of salt marsh ecosystems 抗生素和内分泌干扰物沿陆地-海洋连续体的衰减通量:陆地生态系统的主导作用和盐沼生态系统的修复潜力
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-06 DOI: 10.1016/j.marpolbul.2026.119368
Zi-Long Mo, Yi-Qin Chen, Yang Yu, Ling-Kan Su, Juan-Ying Li
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引用次数: 0
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Marine pollution bulletin
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