Environmental Pollution最新文献

{"title":"Effects of combined stressors to TCDD and high temperature on HSP/CYPs signaling in the zebrafish embryos/larvae","authors":"Hongsong Chen ,&nbsp;Hao Chen ,&nbsp;Lian Hua ,&nbsp;Yunqi Gao ,&nbsp;Yuehua Yao ,&nbsp;Yangfan Xu ,&nbsp;Jingfeng Yang ,&nbsp;Lingtian Xie ,&nbsp;Yongju Luo ,&nbsp;Ting Huang ,&nbsp;Hongxing Chen ,&nbsp;Xuguang Lin ,&nbsp;Wu Dong","doi":"10.1016/j.envpol.2025.126039","DOIUrl":"10.1016/j.envpol.2025.126039","url":null,"abstract":"<div><div>Global warming causes the release of dioxin-like deposits and increases geographical migration, increasing the risk of exposure for humans and animals. In this experiment, we used CYP1A transgenic zebrafish Tg (<em>cyp1a: mCherry</em>) and liver fluorescent transgenic zebrafish Tg (<em>fabp10: Ps Red</em>) as an animal model and exposed to 2,3,7,8-Tetrachlorodibenzo-<em>p</em>-Dioxin (TCDD) at 26 °C and 30 °C, respectively. Morphological changes, histological changes, transcriptome and related genes expression were detected. The results showed that exposure to TCDD at 30 °C increased the mortality rate, pericardial cavity area, and reduced the number of liver cells in zebrafish larvae compared to 26 °C. Transcriptome analysis showed that, TCDD significantly altered Peroxisome Proliferators-Activated Receptors (PPARs) metabolic pathway, adipocytokine, fatty acid degradation and cell death. qRT-PCR also detected a further significant increase in the expression of <em>ahr2</em>, <em>cyp</em>-related genes (<em>cyp1.1</em>, <em>cyp1b1</em>, <em>cyp1c1</em> and <em>cyp3a65</em>), and PPARs (<em>pparα</em>, <em>pparβ</em> and <em>pparγ</em>) in zebrafish larvae induced by TCDD exposure under 30 °C compared to 26 °C water temperature incubation. Our results showed that the increase of ambient temperature (from 26 °C to 30 °C) causes TCDD induced hepatotoxicity to be more intense. The observed toxic changes were likely related to lipid peroxidation.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126039"},"PeriodicalIF":7.6,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143589640","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}

{"title":"Evaluating the reliability of geophysical methods for investigating the migration of a hydrocarbon plume: Validation by sample analysis","authors":"Haitao Yu ,&nbsp;Zhibin Liu ,&nbsp;Min Song ,&nbsp;Luqi Liu ,&nbsp;Zhu Liu ,&nbsp;Enwei Cao ,&nbsp;Xuanran Zhao","doi":"10.1016/j.envpol.2025.126032","DOIUrl":"10.1016/j.envpol.2025.126032","url":null,"abstract":"<div><div>Geophysical methods are extensively used to assess contaminated sites. However, the validation of geophysical exploration results remains crucial for practical applications of these methods. In this study, Electrical Resistivity Tomography (ERT) and Ground Penetrating Radar (GPR) were used to investigate an abandoned hydrocarbon-contaminated site in Jiangsu, China. Dense survey lines were drawn across the contaminated site to generate continuous monitoring data. In addition, 20 boreholes were strategically drilled at identified anomalous points using geophysical methods. Multiple groundwater samples were analyzed from these boreholes and analyzed hydrocarbon concentrations. The obtained geophysical data were compared with groundwater data to assess the hydrocarbon extent and degree at the study site, as well as to evaluate the reliability of the geophysical survey results. The results demonstrated the effectiveness of continuous resistivity profiles in mapping the contaminant plume, showing consistent contaminant migration directions with the groundwater flow. The contaminant plume patterns obtained by interpolating groundwater sample contaminant concentrations were in line with the resistivity profiles. Groundwater samples from boreholes in high-resistivity zones exhibited higher hydrocarbon concentrations than corresponding regulatory limits. On the other hand, GPR successfully identified enhanced reflective signals associated with the presence of hydrocarbons, necessitating comprehensive interpretations that integrate these findings with resistivity results. The analysis results of unsatisfactory geophysical data in relation to the specific site conditions indicated that soil layer heterogeneity was the main source of anomalous electrical responses. This study validated the accuracy and efficiency of geophysical methods in investigating the migration of hydrocarbon plumes and assessing their contamination levels in groundwater.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126032"},"PeriodicalIF":7.6,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143589916","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}

{"title":"Diurnal variations of biogenic volatile organic compounds and their role in secondary pollutant formation in the Huai Hong Khrai subtropical forest, Thailand","authors":"Sarunpron Khruengsai ,&nbsp;Kan-amon Phalangrit ,&nbsp;Teerapong Sripahco ,&nbsp;Manop Kaewfoo ,&nbsp;Nuttapon Sittikarn ,&nbsp;Saran Poshyachinda ,&nbsp;Siwatt Pongpiachan ,&nbsp;Patcharee Pripdeevech","doi":"10.1016/j.envpol.2025.126044","DOIUrl":"10.1016/j.envpol.2025.126044","url":null,"abstract":"<div><div>Understanding the emissions and atmospheric impact of biogenic volatile organic compounds (BVOCs) in subtropical forests remains limited despite their role in secondary pollutant formation. This study presents the first comprehensive BVOC dataset from the Huai Hong Khrai subtropical forest, Northern Thailand, during the dry season (March 4–9, 2024). Using thermal desorption gas chromatography-mass spectrometry (TD-GC-MS), we identified 45 BVOCs, dominated by monoterpenes, sesquiterpenes, and oxygenated derivatives. Unlike temperate forests where sesquiterpenes exhibit stable emissions, this subtropical ecosystem exhibited pronounced nighttime monoterpene accumulation (50 % increase), probably affected by temperature-driven volatilization and reduced atmospheric mixing. Peak area normalization was used to provide a semi-quantitative assessment, with internal standard correction ensuring comparability. However, the absence of ozone scrubbers may have resulted in partial oxidation of reactive BVOCs, and isoprene underestimation was observed due to Tenax-TA's low retention efficiency. Strong correlations were found between α-pinene and environmental drivers, including temperature (r = 0.84), PM_2.5 (r = 0.94), and relative humidity (r = −0.83), highlighting its role in secondary organic aerosol (SOAP, 10 μg/m³ at night) and ozone formation potential (OFP, 200 μg/m³). These results highlight the influence of environmental factors on atmospheric BVOC concentrations and their implications for secondary pollution in subtropical forests. Expanding BVOC research in these ecosystems is crucial for refining atmospheric models, improving air quality management, and developing climate resilience strategies in regions where biogenic and anthropogenic emissions interact.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126044"},"PeriodicalIF":7.6,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143589682","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}

{"title":"Coastal beach ecosystems contaminated by marine litter: Impact on coastal biodiversity, tourism, and environmental sustainability","authors":"H.P.A. Rupasinghe ,&nbsp;I.J.J.U.N. Perera ,&nbsp;R.D.C. Sandaruwan ,&nbsp;H.P.S. Jayapala ,&nbsp;B.K.A. Bellanthudawa ,&nbsp;Asanka Tennakoon","doi":"10.1016/j.envpol.2025.126006","DOIUrl":"10.1016/j.envpol.2025.126006","url":null,"abstract":"<div><div>This study examined the abundance, composition, sources, and pollution status of marine macro litter (&gt;2.5 cm) at four beaches in Sri Lanka (Kallady, Negombo, Kandakuliya, and Balapitiya), located along the coastline of the northern Indian Ocean. Clean Coast Index (CCI), Plastic Abundance Index (PAI), Hazardous Item Index (HII), and Environmental Status Index (ESI) were used to evaluate the pollution levels. A total of 10,873 litter items were collected from four beaches representing 11 typologies. The average density of the litter collected was 0.7–1.2 items/m². Plastic items constituted the majority of litter found, with a percentage of 51%. Kallady Beach was classified as \"extremely dirty,\" while the others were rated as \"dirty\" according to the CCI. All beaches fell under category “II” on the HII. PAI indicated high and moderate plastic contamination, and the ESI classified all sites as having a \"bad\" environmental status. The majority of litter originated from land-based sources, including unsustainable fishing practices, poor waste management, and harmful recreational activities. The findings highlight the urgent need for comprehensive marine and coastal management frameworks to address these challenges. Despite existing awareness and cleanup efforts, the study calls for innovative waste management solutions, enhanced regulations, corporate responsibility, and further research to protect Sri Lanka's coastal ecosystems. These effective management steps are essential to mitigate marine litter and ensure the long-term health of these sensitive ecosystems.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126006"},"PeriodicalIF":7.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576305","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}

{"title":"Size-dependent internalization of gold nanoparticles in individual Tetrahymena thermophila characterized by single-cell mass cytometry","authors":"Junjie Ma ,&nbsp;Yaquan Liu ,&nbsp;Liu Zhang ,&nbsp;Linlin Yao ,&nbsp;Yun Ding ,&nbsp;Hua Qin ,&nbsp;Ziniu Wang ,&nbsp;Xuehan Zheng ,&nbsp;Xinyue Yang ,&nbsp;Haijiang Tian ,&nbsp;Li Zeng ,&nbsp;Liqun Chen ,&nbsp;Runzeng Liu ,&nbsp;Jie Gao ,&nbsp;Qi Wu ,&nbsp;Guangbo Qu ,&nbsp;Guibin Jiang","doi":"10.1016/j.envpol.2025.126030","DOIUrl":"10.1016/j.envpol.2025.126030","url":null,"abstract":"<div><div>Aquatic organisms are inevitably exposed to metallic nanoparticles (NPs) in natural environments, leading to potential harm, ecological disruption, and environmental pollution concerns. Importantly, the size of NPs plays a critical role in influencing their uptake by these organisms. Utilizing mass cytometry, we investigated the internalization characteristics of different-sized gold NPs (AuNPs) in an unicellular ciliate <em>Tetrahymena thermophila,</em> under a low exposure concentration of 1 ngmL⁻¹<em>.</em> This investigation, conducted at both the population and single-cell levels, revealed that the size of AuNPs significantly affected their uptake by <em>T. thermophila</em> cells. The average mass of intracellular AuNPs peaked at 0.5 h and subsequently decreased, attributed to the efflux of AuNPs or cell proliferation. Larger AuNPs resulted in a lower average intracellular AuNPs mass and a smaller proportion of <em>T. thermophila</em> cells accumulating AuNPs (Au-positive (Au^P<em>) T. thermophila</em>). However, when exposed to larger AuNPs, the Au^P <em>T. thermophila</em> cells had a higher AuNPs mass and volumetric concentration factors compared to their exposure to smaller AuNPs. After exposure, while most Au^P <em>T. thermophila</em> cells had intracellular Au content below 2.41 × 10⁻¹⁵ g cell⁻¹, the small groups of <em>T. thermophila</em> cells that accumulated higher mass of AuNPs may be the ones more susceptible to the effects of AuNPs exposure. Additionally, we developed a three-dimensional fitting surface model to depict the relationship among exposure time, AuNP size, and intracellular AuNPs mass in individual <em>T. thermophila</em> cells. This study enhances our understanding of size-specific NPs accumulation in unicellular organisms and provides valuable insights for ecological risk assessment of different sized NPs.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126030"},"PeriodicalIF":7.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576285","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}

{"title":"Micro/nanoplastics in the Shenyang city atmosphere: Distribution and sources","authors":"Chunli Yuan,&nbsp;XiuQin Li,&nbsp;Changhao Lu,&nbsp;Lina Sun,&nbsp;Chunyan Fan,&nbsp;Mingming Fu,&nbsp;Huixin Wang,&nbsp;Mengna Duan,&nbsp;Shuang Xia","doi":"10.1016/j.envpol.2025.126027","DOIUrl":"10.1016/j.envpol.2025.126027","url":null,"abstract":"<div><div>The contamination of atmospheric particulate matter with diameters ≤2.5 μm (PM2.5) by micro/nanoplastics has increasingly attracted scholarly interest. These micro/nanoplastics can be inhaled into the human respiratory system, potentially leading to respiratory and circulatory diseases. However, current methodologies for quantifying small-sized micro/nanoplastics are inadequate, leading to a limited understanding of their determination and sources. This study aims to conduct both qualitative and quantitative analyses of micro/nanoplastics in PM2.5 in Shenyang City utilizing pyrolysis gas chromatography-mass spectrometry (Py-GC/MS), while also investigating their pollution characteristics and sources. Micro/nanoplastics were detected in all atmospheric PM2.5 samples, with polyethylene (PE) and polyvinyl chloride (PVC) identified as the predominant components. The highest recorded mass concentration of micro/nanoplastics was 28.92 μg/m³, with an average concentration of 7.62 μg/m³, accounting for 12.33% of the total PM2.5 mass. The findings indicate a positive correlation between the concentrations of PM2.5 and micro/nanoplastics, suggesting that PM2.5 may serve as a significant transmission medium. The primary sources of micro/nanoplastics have been identified as domestic, industrial, and agricultural activities. This study represents the first assessment of micro/nanoplastics in Shenyang, highlighting the importance of understanding their characteristics and sources. It provides compelling evidence regarding airborne pathways and the potential health impacts of atmospheric microplastics on human health.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126027"},"PeriodicalIF":7.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576308","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}

{"title":"Community structure and metabolic potentials of keystone taxa and their associated bacteriophages within rice root endophytic microbiome in response to metal(loid)s contamination","authors":"Yanlong Jia ,&nbsp;Duanyi Huang ,&nbsp;Xiaolong Lan ,&nbsp;Xiaoxu Sun ,&nbsp;Wenjie Lin ,&nbsp;Weimin Sun ,&nbsp;Yize Wang","doi":"10.1016/j.envpol.2025.126028","DOIUrl":"10.1016/j.envpol.2025.126028","url":null,"abstract":"<div><div>Heavy metal (HM) contamination of agricultural products is of global environmental concern as it directly threatened the food safety. Plant-associated microbiome, particularly endophytic microbiome, hold the potential for mitigating HM stress as well as promoting plant growth. The metabolic potentials of the endophytes, especially those under the HM stresses, have not been well addressed. Rice, a major staple food worldwide, is more vulnerable to HM contamination compared to other crops and therefore requires special attentions. Therefore, this study selected rice as the target plants. Geochemical analysis and amplicon sequencing were combined to characterize the rice root endophytic bacterial communities and identify keystone taxa in two HM-contaminated rice fields. Metagenomic analysis was employed to investigate the metabolic potentials of these keystone taxa. <em>Burkholderiales</em> and <em>Rhizobiales</em> were identified as predominant keystone taxa. The metagenome-assembled genome (MAG)s associated with these keystone populations suggested that they possessed diverse genetic potentials related to metal resistance and transformation (e.g., As resistance and cycling, V reduction, Cr efflux and reduction), and plant growth promotion (nitrogen fixation, phosphate solubilization, oxidative stress resistance, indole-3-acetic acid, and siderophore production). Moreover, bacteriophages encoding auxiliary metabolism genes (AMGs) associated with the HM resistance as well as nitrogen and phosphate acquisition were identified, suggesting that these phages may contribute to these crucial biogeochemical processes within rice roots. The current findings revealed the beneficial roles of rice endophytic keystone taxa and their associated bacteriophages within HM-contaminated rice root endophytic microbiome, which may provide valuable insights on future applications of employing root microbiome for safety management of agriculture productions.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126028"},"PeriodicalIF":7.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576286","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}

{"title":"Microplastics in groundwater: Environmental fate and possible interactions with coexisting contaminants","authors":"Shengfeng Liu ,&nbsp;Chengcheng Li ,&nbsp;Jochen Bundschuh ,&nbsp;Xubo Gao ,&nbsp;Xing Gong ,&nbsp;Huihui Li ,&nbsp;Mengyun Zhu ,&nbsp;Ling Yi ,&nbsp;Wenxuan Fu ,&nbsp;Fengze Yu","doi":"10.1016/j.envpol.2025.126026","DOIUrl":"10.1016/j.envpol.2025.126026","url":null,"abstract":"<div><div>Microplastics (MPs) are emerging environmental pollutants which represent a serious threat to ecosystems and human health and have received significant attention from the global community. Currently, a growing number of studies have found the presence of MPs in groundwater. This study exhaustively reviewed varying degrees of recent publications in Web of Science database and investigated the characteristics of MPs (concentration, types, sizes and shapes) in groundwater ecosystems, their migration characteristics, and interactions with co-occurring contaminants. Results suggested that current global research on MPs in groundwater has primarily focused on countries such as India, South Korea, China, Italy and United States. Pollution levels of MPs in groundwater show significant variability, ranging from 0 to 6832 n/L. The predominant plastic polymer types include PP, PE, PS, PA, PET and PVC. The sources of MPs in groundwater are primarily classified as associated with natural processes and anthropogenic activities. The physical, chemical and biological properties can influence the migration of MPs into groundwater. Furthermore, MPs can act as carriers, interacting with co-occurring contaminants, thereby enhancing their migration and toxicity, potentially posing a threat to groundwater ecosystems and human health. Consequently, the major challenges and associated recommendations for forthcoming research on MPs in groundwater are proposed.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126026"},"PeriodicalIF":7.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576306","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}

{"title":"Volatile organic compounds emission characteristics and factors from stage-dependent combustion in typical biomass stoves in northern China: Field measurements and environmental implications","authors":"Ke Yue ,&nbsp;Yulong Yan ,&nbsp;Zhen Li ,&nbsp;Yueyuan Niu ,&nbsp;Jiaqi Dong ,&nbsp;Yongqian Zhou ,&nbsp;Junjie Li ,&nbsp;Lin Peng","doi":"10.1016/j.envpol.2025.126008","DOIUrl":"10.1016/j.envpol.2025.126008","url":null,"abstract":"<div><div>Residential biomass burning (RBB) has significant impact on the ambient air quality in rural China. To explore the detailed emission characteristics and impact of various stove types and their combustion stages of RBB, which unresolved issue in existing studies, this study investigated the volatile organic compounds (VOCs) emissions of different combustion stages from four typical RBB stoves in Northern China, including kang stove (KS), brick stove (BS), metal stove (MS) and pellet stove (PS). The KS has the highest VOCs emission factors (EFs) (1.51 g/kg), which was related to the inadequate combustion caused by poor air circulation in the stove structure, and the moisture content and lower lignin content in the fuel. The smoldering stage exhibited the highest VOCs EFs, especially for BS (3.19 g/kg) and KS (1.57 g/kg), which were due to the lower air flow velocity for BS and KS. In addition, the direct contact of ash and fuel could increase the secondary decomposition of particulate pollutants, which also contribute mainly to higher EFs. Oxygenated volatile organic compounds (OVOCs) contributed most than other species during the smoldering stage. The calculation results of RBB emissions in different regions of China indicated that Northeast China have the highest emission proportion, which may be attributed to the high demand for RBB. The KS exhibited the highest ozone formation potential and health risk, especially during the smoldering stage. This study comprehensively measured the EFs of different stoves at different combustion stages and fuels, filling the gap in existing research and providing data support for related research work in the future.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126008"},"PeriodicalIF":7.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576313","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}

{"title":"Increased assimilation efficiency and mortality rate in Gammarus fossarum exposed to PVC microplastics","authors":"Nans Barthelemy ,&nbsp;Florian Mermillod-Blondin ,&nbsp;Anabelle Espeyte ,&nbsp;Mohammad Wazne ,&nbsp;Frédéric Hervant ,&nbsp;Ghislaine Broillet ,&nbsp;Davide Degli-Esposti ,&nbsp;Arnaud Chaumot ,&nbsp;Stefan Krause ,&nbsp;Laurent Simon ,&nbsp;Thibault Datry","doi":"10.1016/j.envpol.2025.126029","DOIUrl":"10.1016/j.envpol.2025.126029","url":null,"abstract":"<div><div>Shredder organisms play a key role in rivers by feeding and fragmenting coarse organic matter that will then be exploited by other consumers. The effects of microplastics (MPs) on <em>Gammarus</em> sp., an ubiquitous genus of freshwater amphipods, and its shredding activity have been broadly investigated. However, the potential behavioral and physiological effects of different sizes of MPs on <em>Gammarus</em> sp. remain overlooked despite the recognized influence of MP size on MP toxicity. This study investigated the effects of a 28-day exposure to four different concentrations of two size fractions of PVC-microplastics (PVC-MPs), on <em>Gammarus fossarum</em> mortality rate, feeding rate, assimilation efficiency, and expression of proteins involved in key processes. Increased mortality was observed for all treatments exposed to PVC-MPs, with higher mortality in the presence of smaller PVC-MPs at the highest concentration. No protein biomarker modulation was observed in presence of PVC-MPs, suggesting that no metabolic stress but direct physical damages of PVC-MPs might have led to the observed mortalities. No difference was observed for feeding rates, but a higher assimilation efficiency was measured for individuals exposed to PVC-MPs, regardless of the concentration. This could be due to energy reallocation towards defense mechanisms or indicate a potential shift in digestive microbiota. This study highlighted the toxicity of PVC-MPs, particularly of smaller sizes and even at relatively low concentration, for <em>Gammarus fossarum</em>. PVC-MP pollution may therefore alter the functional integrity of river ecosystems by reducing the abundance of shredder organisms and, subsequently, the process of leaf litter decomposition.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126029"},"PeriodicalIF":7.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576307","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}