Environmental Pollution最新文献_第5页

Fish functional diversity responses to total phosphorus in the rivers of the Baltic Sea catchment area

IF 8.9 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-13 DOI: 10.1016/j.envpol.2025.126062

Māra Deksne, Peter M. van Bodegom, Laura Scherer

{"title":"Fish functional diversity responses to total phosphorus in the rivers of the Baltic Sea catchment area","authors":"Māra Deksne, Peter M. van Bodegom, Laura Scherer","doi":"10.1016/j.envpol.2025.126062","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126062","url":null,"abstract":"Eutrophication results from nutrient overload in aquatic ecosystems and affects primary productivity patterns, which impacts the living conditions of aquatic organisms. The rivers in the catchment area of the Baltic Sea are greatly affected by eutrophication, but impacts on fish functional diversity are poorly understood. This study, therefore, evaluates the effects of freshwater eutrophication on fish functional diversity in the rivers of the Baltic Sea catchment area. Total phosphorus is used as the eutrophication indicator. Functional richness, evenness, and divergence values were calculated using comprehensive fish trait and occurrence databases. Functional evenness was found to be negatively related to eutrophication. Functional divergence demonstrated a positive relation but responded to lesser extents than functional evenness. Functional richness showed no or a negative response, depending on whether environmental covariates were considered. As a comparison, species richness revealed a negative relationship and was the most responsive to increasing eutrophication of all measures evaluated. Hence, this study demonstrates the varying nature of responses of multiple diversity indices and comprehensively describes the response of fish communities to increasing eutrophication in the area. The results show that functional redundancy helps to reduce adverse effects of species losses on functional diversity, which provides an important starting point for impact assessment. The findings illustrate that actions to limit nutrient discharge to freshwater are needed to maintain sustainable riverine ecosystems.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"4 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Ammonia-rich sediment: Practical issues about embryotoxicity as endpoint supporting challenges in dredging activities

IF 7.6 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-13 DOI: 10.1016/j.envpol.2025.126058

Elisa Chiara Bizzotto , Giovanni Libralato , Lorenzo Saviano , Marta Citron , Petra Scanferla , Fabio Russo , Antonio Marcomini

{"title":"Ammonia-rich sediment: Practical issues about embryotoxicity as endpoint supporting challenges in dredging activities","authors":"Elisa Chiara Bizzotto , Giovanni Libralato , Lorenzo Saviano , Marta Citron , Petra Scanferla , Fabio Russo , Antonio Marcomini","doi":"10.1016/j.envpol.2025.126058","DOIUrl":"10.1016/j.envpol.2025.126058","url":null,"abstract":"<div><div>Regulations for dredging and sediment management often require the use of toxicity tests to support sediment classification, together with chemical characterization; among available bioassays, embryotoxicity tests (conducted on aqueous phase prepared from sediment) are commonly applied to evaluate sub-chronic toxicity, as in the case of Italian legislation. However, toxicity tests can be influenced by several confounding factors, such as ammonia that, in the context of sediment management, generally is not considered as a “traditional” contaminant of concern due to its low persistence. In order to better address and optimize sediment management, it is therefore essential to understand the influence of ammonia on the observed sediment toxicity. The scope of this work is to provide an overview of the toxic effects of ammonia focusing on embryotoxicity endpoints, enabling a proper evaluation of sediment toxicity, discussing the role of ammonia on sediment quality classification, and contributing to improve the management options. The paper presents the results of an experimental activity aimed at evaluating the role of ammonia on sediment toxicity, jointly to a literature review delineating the range of ammonia toxicity thresholds on larval development evaluated in embryotoxicity tests for oysters, mussels and sea urchins. Results from this study demonstrated the influence of ammonia on sediment toxicity from a case-study (Venice lagoon), testing methods for toxicity identification evaluation and providing recommendation to support scientific discussion to pursue the most sustainable sediment management, especially when just the embryotoxicity endpoint is responding concomitantly to high ammonia levels, considering that; impacts primarily due to nonpersistent contaminants should be managed differently than persistent ones.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126058"},"PeriodicalIF":7.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating CO2 and Sound as an Invasive Bigheaded Carp Deterrent in a Model Lock and Dam

IF 8.9 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-13 DOI: 10.1016/j.envpol.2025.126056

Michael Frett, Jessica L. Kozarek, Amelia Berry, Allen F. Mensinger

{"title":"Evaluating CO2 and Sound as an Invasive Bigheaded Carp Deterrent in a Model Lock and Dam","authors":"Michael Frett, Jessica L. Kozarek, Amelia Berry, Allen F. Mensinger","doi":"10.1016/j.envpol.2025.126056","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126056","url":null,"abstract":"Several deterrents are currently being investigated to block the upstream migration of invasive silver (<em>Hypophthalmichthys molitrix</em>) and bighead carp (<em>H. nobilis</em>). Broadband sound (100 hp outboard boat motor recording) and dissolved CO<sub>2</sub> both show potential for restricting the upstream movement of invasive bigheaded carp through contained environments such as lock chambers. This study examined the effect of combining both broadband sound and CO<sub>2</sub> into a multimodal deterrent to restrict upstream passage via the lock chamber in a 10,000 L flow through model lock and dam system. Bigheaded carp schools were classically conditioned to associate broadband sound with elevated levels of CO<sub>2</sub> in the lock chamber. After conditioning, broadband sound alone was 100% effective in restricting the upstream passage of bigheaded carp under standard lock chamber operations, and bigheaded carp were deterred from entering and transiting the lock chamber for 28 consecutive trials over a one-week period. These results could help inform field deployments of non-physical deterrents within lock chambers for restricting the upstream movement of invasive bigheaded carp.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"88 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Neonicotinoid and bisamide insecticides in wild freshwater fish from the Wanquan River, Hainan, China: Factors affecting tissue distribution and a risk assessment

IF 8.9 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-12 DOI: 10.1016/j.envpol.2025.126053

Song Liu, Ya-jun Shi, Wen-ming Chen, Xing-wei Cai, Ji-liang Zhang

{"title":"Neonicotinoid and bisamide insecticides in wild freshwater fish from the Wanquan River, Hainan, China: Factors affecting tissue distribution and a risk assessment","authors":"Song Liu, Ya-jun Shi, Wen-ming Chen, Xing-wei Cai, Ji-liang Zhang","doi":"10.1016/j.envpol.2025.126053","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126053","url":null,"abstract":"A growing number of studies have reported that neonicotinoid (NEO) and bisamide (BIS) insecticides are widespread in multimedium; however, limited information is available on their occurrence in wild freshwater fish. Therefore, in the Wanquan River with national aquatic germplasm resource reserves in Hainan, China, 502 fish containing 22 species were collected to investigate the occurrence of twelve NEOs and six BISs. The results showed that six NEOs and three BISs were detected in liver (ND-26.1515 ng/g wet weight (ww), whereas five NEOs and three BISs were detected in muscle (ND-1.6067 ng/g ww). Clothianidin had the highest detection frequency in liver (35.26%) and muscle (53.39%); however, imidacloprid (0.2106 ng/g ww) and dinotefuran (0.0353 ng/g ww) had the highest mean concentrations. Furthermore, the results indicated significant differences in insecticide concentrations between fish with different feeding habits, habitats, and spatial distributions. Benthic fish tend to accumulate BISs in liver and carnivorous fish have highest NEOs concentration in muscle. In addition, fish in the midstream and downstream regions had higher NEOs and total concentrations than those in the upstream region. Spearman’s correlation analysis revealed significant weak negative correlations between the concentration of almost all insecticides with body length and weight. Health risk assessments indicated that the hazard quotient for all insecticides was below 1, suggesting no immediate health risk to humans from consuming freshwater fish. These findings reveal previously unrecognized contamination of BISs in wild freshwater fish and expand the dataset on NEOs occurrence in fish from different sources, establishing a critical foundation for toxicologic research, insecticide pollution control, and human health protection.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"5 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Bioaccumulation and biotransformation of hexavalent chromium in black soldier fly (Hermetia illucens) in the antagonism of selenate

IF 7.6 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-12 DOI: 10.1016/j.envpol.2025.126054

Kuan-Chieh Feng, Muhammad Muneeb Ur Rehman, Jung-Chen Huang

{"title":"Bioaccumulation and biotransformation of hexavalent chromium in black soldier fly (Hermetia illucens) in the antagonism of selenate","authors":"Kuan-Chieh Feng, Muhammad Muneeb Ur Rehman, Jung-Chen Huang","doi":"10.1016/j.envpol.2025.126054","DOIUrl":"10.1016/j.envpol.2025.126054","url":null,"abstract":"<div><div>As a global environmental pollutant, many studies have focused on the removal of hexavalent chromium [Cr(VI)] from industrial wastewater, using organic materials as adsorbents. This study investigated the potential of the black soldier fly (BSF) for the bioremediation of the Cr-adsorbing/containing wheat bran as an adsorbent and antagonistic effects of selenate [Se(VI)] on Cr accumulation/transformation by the BSF. Our results indicate the BSF could tolerate Cr/Se toxicity without exhibiting significant morphological changes. Cr/Se concentrations in the BSF biomass decreased over the life cycle, suggesting the detoxification of both contaminants, while relatively lower Cr but significantly higher Se concentrations were found in the larvae co-exposed to Cr and Se, compared with the Cr/Se-exposed only larvae. Low bioaccumulation factor (BAF) values (∼0.47) indicate the absorbed Cr tended to be excreted out. The XAS results suggest the accumulated Cr was mainly present as elemental chromium during growth, while the Se, potentially as an antagonist, was mainly converted to elemental selenium and organo-Se species (selenomethionine/selenocystine) in the BSF co-exposed to Cr and Se. Overall, our study provides a better understanding of the biotransformation of Cr(VI), with or without Se, by the BSF, and risks of using the Cr-containing BSF as feed.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126054"},"PeriodicalIF":7.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Multiomics analysis revealed the effects of polystyrene nanoplastics at different environmentally relevant concentrations on intestinal homeostasis

IF 7.6 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-12 DOI: 10.1016/j.envpol.2025.126050

Jian-Zheng Yang , Ji-Hui Li , Jia-Li Liu , An-Ding Zhou , Hui Wang , Xiao-Li Xie , Kai-Kai Zhang , Qi Wang

{"title":"Multiomics analysis revealed the effects of polystyrene nanoplastics at different environmentally relevant concentrations on intestinal homeostasis","authors":"Jian-Zheng Yang , Ji-Hui Li , Jia-Li Liu , An-Ding Zhou , Hui Wang , Xiao-Li Xie , Kai-Kai Zhang , Qi Wang","doi":"10.1016/j.envpol.2025.126050","DOIUrl":"10.1016/j.envpol.2025.126050","url":null,"abstract":"<div><div>Nanoplastics pollution is a global issue, with the digestive tract being one of the first affected organs, requiring further research on its impact on intestinal health. This study involved orally exposing mice to polystyrene nanoplastics (PS-NPs) at doses of 0.1, 0.5, or 2.5 mg/d for 42 days. The effects on intestinal health were thoroughly assessed via microbiomics, metabolomics, transcriptomics, and molecular biology. Our study demonstrated that the administration of all three doses of PS-NPs resulted in increased colonic permeability, heightened colonic and peripheral inflammation, reduced levels of antimicrobial peptides, and shortened colonic length. These effects may be attributed to a reduction in the abundance of probiotic bacteria, such as Clostridia_UCG-014, Roseburia, and Akkermansia, alongside an increase in the abundance of the pathogenic bacterium Desulfovibrionaceae induced by PS-NPs. Furthermore, we underscored the crucial role of histidine metabolism in PS-NPs-induced colonic injury, characterized by a significant reduction of L-histidine, which is closely related to microbial ecological dysregulation. Corresponding to microbiota deterioration and metabolic dysregulation, transcriptome analysis revealed that PS-NPs may disrupt colonic immune homeostasis by activating the TLR4/MyD88/NF-κB/NLRP3 signaling pathway. In conclusion, this study provided novel insights into the mechanisms by which PS-NPs disrupt intestinal homeostasis through integrated multiomics analysis, revealing critical molecular pathway and providing a scientific basis for future risk assessment of nanoplastics exposure.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126050"},"PeriodicalIF":7.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143598869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effect mechanism of low-molecular-weight organic acids during sulfidation of As(V)-bearing ferrihydrite

IF 7.6 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-12 DOI: 10.1016/j.envpol.2025.126031

Yitong Yin , Shanshan Yang , Fei Liu , Xue Wang , Yue Chen , Ximing Luo

{"title":"Effect mechanism of low-molecular-weight organic acids during sulfidation of As(V)-bearing ferrihydrite","authors":"Yitong Yin , Shanshan Yang , Fei Liu , Xue Wang , Yue Chen , Ximing Luo","doi":"10.1016/j.envpol.2025.126031","DOIUrl":"10.1016/j.envpol.2025.126031","url":null,"abstract":"<div><div>Sulfide induces the reductive dissolution of iron (oxyhydr) oxides, the primary host phases for arsenic (As), thereby triggering As release. We investigates the physicochemical mechanisms of three types of low molecular weight organic acids (LMWOAs) on sulfide-mediated reductive dissolution of As(V)-ferrihydrite and As release using batch experiments combined with hydro-chemical, spectroscopic, and microscopic analyses. Arsenate dominated the aqueous (97.2–100 %) and solid phases throughout the experiment. LMWOAs accelerated S(-II) consumption and As release by inhibiting FeS formation, with rates ordered as citric acid (CA) > oxalic acid (OA) > malic acid (MA) > control (Kb). At S(-II): Fe = 0.5, maximum As release was 11.78 % (Kb) and 14.60 % (CA); at S(-II): Fe = 1, it was 27.58 % (Kb) and 30.71 % (OA). LMWOAs enhanced As release via non-reductive ligand dissolution of As(V)-ferrihydrite. Secondary mineral formation in later stages re-immobilized As, with mineral layers ≥50 nm thick. LMWOAs interacted differently with secondary minerals: CA primarily adsorbed on surfaces, while MA integrated into the matrix. LMWOAs influenced As redistribution in secondary minerals, increasing contamination risks. Thus, the complex effects of organic matter (OM) on Fe, S, and As biogeochemistry must be considered in risk assessments and remediation strategies for As-contaminated sites in sulfidic environments.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126031"},"PeriodicalIF":7.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Distinct responses of Caenorhabditis elegans to polyethylene microplastics and plant secondary metabolites

IF 7.6 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-12 DOI: 10.1016/j.envpol.2025.126051

Yi Wang , Wanxin Liu , Ziwei Chen , Kaixin Zheng , Xianliang Yi , Jiao Wang , Xiaochen Chen , Xianhua Liu

{"title":"Distinct responses of Caenorhabditis elegans to polyethylene microplastics and plant secondary metabolites","authors":"Yi Wang , Wanxin Liu , Ziwei Chen , Kaixin Zheng , Xianliang Yi , Jiao Wang , Xiaochen Chen , Xianhua Liu","doi":"10.1016/j.envpol.2025.126051","DOIUrl":"10.1016/j.envpol.2025.126051","url":null,"abstract":"<div><div>Soil worms are among the most abundant and functionally diverse soil animals. However, they have been largely overlooked in studies on microplastic (MP) toxicity. MPs and plant secondary metabolites (PSMs) are ubiquitous in soil due to plant litter decomposition and heavy MP contamination, inevitably interacting and exerting combined toxicity on soil organisms. However, little research has been conducted on their joint effects. This study investigates the individual and combined toxic effects of polyethylene (PE) MPs and three PSMs (glycyrrhizic acid, tannic acid, and matrine) on the model organism <em>Caenorhabditis elegans</em>. Physiological and biochemical responses were assessed using fluorescence microscopy, image analysis, and statistical methods. After 42 h of exposure to PE MPs and/or PSMs, worm growth and development were negatively impacted. Under experimental conditions, matrine and PE MPs synergistically inhibited worm growth, exacerbated neurological damage, and induced oxidative stress. In contrast, glycyrrhizic acid and tannic acid alleviated PE MP-induced growth inhibition, mitigated oxidative stress, and demonstrated antioxidant properties that counteracted oxidative damage. This study offers new insights into the combined effects of MPs and PSMs in soil ecosystems, contributing to ecological risk assessments and pollution management strategies.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126051"},"PeriodicalIF":7.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143598807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Urban trace metal contamination is negatively associated with condition and wing morphology in a common waterbird

IF 8.9 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-12 DOI: 10.1016/j.envpol.2025.126046

Piotr Minias, Marcin Markowski, Mirosława Słaba, Amelia Chyb, Joanna Drzewińska-Chańko, Jan Jedlikowski, Jerzy Bańbura, Radosław Włodarczyk

{"title":"Urban trace metal contamination is negatively associated with condition and wing morphology in a common waterbird","authors":"Piotr Minias, Marcin Markowski, Mirosława Słaba, Amelia Chyb, Joanna Drzewińska-Chańko, Jan Jedlikowski, Jerzy Bańbura, Radosław Włodarczyk","doi":"10.1016/j.envpol.2025.126046","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126046","url":null,"abstract":"Urban areas suffer from different forms of environmental pollution by light, noise, and chemicals. Pollution by trace metals has long been associated with industrialization and urbanization processes, increasing the risk of bioaccumulation and compromising the health, condition, and fitness of urban animals. Here, we aimed to investigate the effects of urbanization on bioaccumulation of six trace metals (Cu, Ni, Zn, Cd, Pb, and Mn) in the integumentary structures (feathers) of a non-passerine waterbird, the Eurasian coot (<em>Fulica atra</em>). For this purpose, we quantified and compared trace metal concentrations in feathers of 300 coots from four pairs of non-urban and urban populations associated with major agglomerations in Poland. We found that concentrations of three trace metals (Cu, Ni, and Zn) were significantly higher in coots from the urban landscape, compared to individuals from natural or semi-natural non-urban habitats. Elevated trace metal concentrations were negatively associated with morphology (wing length) and condition (body mass and blood haemoglobin concentration) of coots, and these associations were detected exclusively in the urban landscape. There was limited evidence of elevated trace metal pollution in the non-urban landscape (only Cd) and only weak support for a negative association of Pb concentration with physiological stress of non-urban coots. Our results suggest that trace metal contamination may be considered an important cost of urbanization processes in wildlife. We argue that mitigation of trace metal pollution in urban ecosystems should likely increase their sustainability and viability of urban animal populations.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"183 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Organic matter content, source, and composition varying with seasons and anthropogenic activities regulate methylmercury dynamics in the Yellow River

IF 7.6 2区环境科学与生态学

Environmental Pollution Pub Date : 2025-03-12 DOI: 10.1016/j.envpol.2025.126042

Xiaoquan Liu , Yingjun Wang , Xiaomeng Ji , Qingzhe Zhang , Yue Song , Yanbin Li , Yongguang Yin , Yong Cai

{"title":"Organic matter content, source, and composition varying with seasons and anthropogenic activities regulate methylmercury dynamics in the Yellow River","authors":"Xiaoquan Liu , Yingjun Wang , Xiaomeng Ji , Qingzhe Zhang , Yue Song , Yanbin Li , Yongguang Yin , Yong Cai","doi":"10.1016/j.envpol.2025.126042","DOIUrl":"10.1016/j.envpol.2025.126042","url":null,"abstract":"<div><div>Organic matter (OM) in rivers, influenced by natural and anthropogenic events, plays a critical role in regulating methylmercury (MeHg) dynamics. This study investigated the spatial-temporal patterns of MeHg and OM in the Yellow River, through collecting water and sediment samples within the dry and wet seasons and human-induced water-sediment regulation scheme (WSRS) event. During the wet season, the river water was characterized by terrigenous OM, high unfiltered MeHg (UMeHg) concentration (206 ± 83.6 pg/L), and a low UMeHg percentage in unfiltered total Hg (UTHg) (UMeHg/UTHg = 0.37 ± 0.18 %). These findings may suggest that MeHg in the wet season was likely produced in the catchment and imported into the river. In contrast, autochthonous OM predominated during the dry season, probably enhancing <em>in situ</em> MeHg production (UMeHg/UTHg = 1.01 ± 0.50 %), although UMeHg concentration was lower (81.8 ± 25.5 pg/L) due to obviously reduced external inputs. The WSRS dramatically increased water MeHg contents (589 ± 116 pg/L) and UMeHg/UTHg ratios (0.78 ± 0.16 %) probably through direct inputs of upstream reservoirs’ MeHg and resuspension of downstream sediments. Exploring the effects of OM on sediment MeHg sources suggested that MeHg in the wet season primarily originated from watershed soil inputs, while in the dry season, it mainly resulted from <em>in situ</em> Hg methylation. However, extremely low total Hg (THg) and MeHg/THg (0.02–0.35 %) indicated that sediment MeHg production may be of minor importance in the Yellow River.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126042"},"PeriodicalIF":7.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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