Science of the Total Environment最新文献

{"title":"Implications of river reconnection on phosphorus cycling in coastal wetlands","authors":"Lee Potter,&nbsp;Peter Mates,&nbsp;John R. White","doi":"10.1016/j.scitotenv.2025.179205","DOIUrl":"10.1016/j.scitotenv.2025.179205","url":null,"abstract":"<div><div>Louisiana's coastal wetlands are experiencing some of the world's largest land loss rates. This problem is partly due to levees along the Mississippi River, isolating the river from the coastal basins. This disconnect prevents delivering of sediment and nutrients to the wetland-dominated coastal basins, where sediments would increase marsh accretion. Louisiana's Coastal Master Plan aims to reconnect the river with riparian areas through construction of a diversion. Baseline phosphorus (P) dynamics were determined before river reconnection and compared to an area with an unmanaged connection to the river. In Barataria Basin, the equilibrium P concentration (EPC) was lower in both the marsh (0.039 ± 0.015 mg L⁻¹) and open water sediments (0.016 ± 0.008 mg L⁻¹) than the concentration of soluble reactive phosphorus (SRP) in the Mississippi River (∼0.075 mg L⁻¹). Additionally, total P was significantly higher in marsh soil (677 ± 183 mg P kg⁻¹) compared to the open water sediments (503 ± 90 mg P kg⁻¹). On average, the organic residual P fraction was the dominant individual P form, comprising 39 % (254 ± 78.2 mg P kg⁻¹) of total phosphorus (TP) in marsh soil and 45 % (208 ± 65.9 mg P kg ⁻¹) of TP in open water sediments. The primary form of total P in the river sediment is the Fe/Al mineral fraction at 43 % (469 mg P kg ⁻¹). Consequently, river reconnection, the dominant form of soil P will shift to inorganic Fe/Al-bound P. This shift will likely increase the internal loading of P over time due to iron reduction, releasing newly deposited mineral-bound phosphorus into the water column In vegetated wetland areas, this river-sourced P can be taken up by algae and macrophytes, while in open water areas, there could be an increase in algal blooms in these newly river-reconnected coastal basins, changing the P dynamics.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"974 ","pages":"Article 179205"},"PeriodicalIF":8.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Tackling microplastic contamination in sewage sludge: Optimizing organic matter degradation, quantifying microplastic presence, and evaluating ecological risks for sustainable agriculture","authors":"Irédon Adjama ,&nbsp;Hemen Dave","doi":"10.1016/j.scitotenv.2025.179201","DOIUrl":"10.1016/j.scitotenv.2025.179201","url":null,"abstract":"<div><div>The omnipresence of Microplastics (MPs) is a growing global concern. Using sewage sludge as fertilizer for soil amendment can be a potential source of MPs in agricultural soil if sludge contains MPs. Sludge is a complex matrix rich in organic matter, which hinders MPs separation. For maximal organic matter degradation, in this study, the application of Fenton reagents optimized for (Fe²⁺/H₂O₂) molar ratios, i.e., 1/2, 1/4, 1/6, 1/8, and 1/10. The results show that a molar ratio of 1/2 of Fe²⁺/H₂O₂ can remove 86.6 % of the organic matter in the sewage sludge. The greenness of the optimized method was assessed and compared to available methods using AGREEprep software. The method achieved a greenness score of 0.61, significantly higher than the highest score of 0.45 among the previously reported optimized methods. This optimized method was used in the analysis of MPs in sewage sludge from 14 sewage treatment plants in Ahmedabad. Also, the ecological risks due to the application of such sludge in agriculture were assessed. MPs analysis reveals variability in MPs contamination ranging from 2.43 to 22.72 × 10³ units/kg of sludge. Small-sized MPs (0.05–0.25 mm) constitute the highest proportion (65 %), predominantly comprising fibers and fragments. From a chemical composition point of view, six different types of MPs are identified, among which PU, Nylon, HDPE, and PP are the most abundant. Ecological risk assessment indicated extreme hazards in terms of the potential ecological risk index being higher than 1200 for all the sludge samples due to the abundance of MPs, specifically of PU and Nylon.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"974 ","pages":"Article 179201"},"PeriodicalIF":8.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Research on dust diffusion reduction-control technology of wind guide hood system based on an improved tunnel pressurized air system","authors":"Haonan Zhang,&nbsp;Xinpeng Liu,&nbsp;Yun Hua,&nbsp;Qiang Liu,&nbsp;Lidian Guo,&nbsp;Chuanxing Cheng,&nbsp;Zilian Zhu,&nbsp;Yuankun Cai,&nbsp;Shihao Liu","doi":"10.1016/j.scitotenv.2025.178966","DOIUrl":"10.1016/j.scitotenv.2025.178966","url":null,"abstract":"<div><div>The dust generated during tunnel construction poses a serious threat to the health of construction workers. High dust concentrations rapidly spread throughout the tunnel, severely polluting the construction environment. To improve these conditions, the present study sought to develop a wind volume-wind direction guide device, hereinafter referred to as wind guide hood (WGH), which can regulate the pressure air volume in real time. The WGH ventilation and dust control system divides the wind volume into two parts while maintaining a total pressurized air volume of 500 m³/min. One part of the wind volume flows to the digging working face through a pressurized air cylinder, whereas the other part is discharged to the back side of the tunnel, thus achieving dust control. By separating the airflow, the system minimizes the airflow to the face, thereby slowing down dust diffusion. The results revealed that installing the WGH system effectively controls dust propagation. When the airflow to the face is 20 m³/min, the diffusion distance of high-concentration dust is reduced to 18.7 m, and the dust control efficiency is increased by 68.04 %, thereby greatly improving the working conditions within the tunnel.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"974 ","pages":"Article 178966"},"PeriodicalIF":8.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Radiological impact of the Fessenheim Nuclear Power Plant decommissioning through prospective Life-Cycle and Risk Assessment approaches","authors":"Paul Robineau,&nbsp;Maria Boltoeva,&nbsp;Nicolas Arbor,&nbsp;Gaetana Quaranta","doi":"10.1016/j.scitotenv.2025.179200","DOIUrl":"10.1016/j.scitotenv.2025.179200","url":null,"abstract":"<div><div>The Fessenheim Nuclear Power Plant (NPP) is the first large-scale plant in France scheduled for decommissioning, set to begin in 2026. Few studies have investigated NPP decommissioning's environmental impacts and especially radiological ones, which have been generally understudied within Life-Cycle Assessment (LCA). This work builds on and complements <em>Électricité de France</em>'s (EDF) regulatory Health &amp; Environmental Risk Assessment (HERA) by conducting an LCA following ISO 14040/44 standards, dynamically accounting for atmospheric and freshwater discharges over 15 years. Radiological impacts on human health are estimated using two recently developed Life-Cycle Impact Assessment (LCIA) methods: UCrad, built as a radiological counterpart to USEtox (designed for global averaged results), and CGM, drawing on the analytical modeling of HERA studies (intended for plant-scale assessments in a screening context). At the midpoint level, ³H, ¹⁴C, and ⁶⁰Co are identified as key radionuclides, with varying contribution to total impacts across methods, the Water Metal cutting and Regular exploitation processes being the primary discharge sources. The worst estimate of public total dose is 400 times lower than the French average annual dose. However, comparisons with EDF's results and other HERA studies show CGM's limited current relevance for bridging HERA and LCA due to divergent results. The creation of adapted characterization factors (CFs) for alternative discharge configurations is recommended. Using QGIS software, population data aligned with shared socio-economic pathways (SSPs) enable creation of prospective endpoint-level CFs, allowing comparison between static and prospective UCrad estimates. Neglecting the prospective dimension of NPP decommissioning leads to a 17–21.8 % underestimation of global damages. CGM being site-dependent, population distribution assumptions heavily influence results. Since CGM midpoint impacts seem reasonably interpolated as a function of distance, improvements could involve implementing spatial fits within QGIS to compute representative CGM endpoint impacts, provided an appropriate balance between computation time and spatial resolution is commonly adopted.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"974 ","pages":"Article 179200"},"PeriodicalIF":8.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}

{"title":"Estimation of N2O and CH4 emissions in field study and DNDC model under optimal nitrogen level in rice-wheat rotation system","authors":"Yinzheng Ma,&nbsp;Yunfa Qiao,&nbsp;Yujie Tang,&nbsp;Yue Wu,&nbsp;Shujie Miao","doi":"10.1016/j.scitotenv.2025.179168","DOIUrl":"10.1016/j.scitotenv.2025.179168","url":null,"abstract":"<div><div>The rice-wheat rotation system in the lower-and-middle section of the Yangtze River Basin plays a crucial role in ensuring China's food security, contributing significantly to the nation's grain production. However, in recent years, the overuse of nitrogen fertilizers to boost yields has led to growing environmental concerns, particularly with respect to greenhouse gas (GHG) emissions, such as nitrous oxide (N₂O) and methane (CH₄). To optimize the management of the rice-wheat system and ensure the attainment of the goal of greenhouse gas emission reduction without compromising crop yields, in this study, we combined field experiments and DNDC model to estimate comprehensively the economic and reduced-emission benefits. Our results showed that N₂O emissions increased significantly as nitrogen application rose, demonstrating a positive linear relationship between nitrogen input and N₂O release. However, CH₄ emissions followed a more complex trend, initially decreasing and then rising as nitrogen increased, likely due to the intricate interactions between soil nitrogen availability, organic matter decomposition, microbial processes and plant growth. The DNDC model simulation exhibited a high degree of accuracy in predicting crop yields and N₂O emissions, particularly at higher nitrogen application levels. However, the model's performance was less reliable for lower nitrogen application scenarios and for simulating CH₄ emissions, suggested further refinement of the model's underlying mechanisms is required. Based on field data and simulation results, this study identified an optimized fertilization strategy for reducing GHG emissions while maintaining crop productivity. By reducing nitrogen application rates to 223 kg N ha for wheat and 222 kg N ha for rice, and controlling the straw return to 10 %, which might be possible to significantly lower N₂O and CH₄ emissions without yield loss and input cost. This strategy would offer a potential practice for balancing agricultural productivity with environmental sustainability, promoting the development of low-carbon farming practices in the region and contributing to the global effort to mitigate climate change.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"974 ","pages":"Article 179168"},"PeriodicalIF":8.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Aqueous compost extracts with stabilized biofertilizing microbiota promote plant root growth and drought resilience","authors":"R. Lerma-Moliz ,&nbsp;J. Hu ,&nbsp;J.A. López-González ,&nbsp;F. Suárez-Estrella ,&nbsp;M.R. Martínez-Gallardo ,&nbsp;M.M. Jurado ,&nbsp;M.J. Estrella-González ,&nbsp;A.J. Toribio ,&nbsp;R. Jiménez ,&nbsp;S. De Neve ,&nbsp;M.J. López","doi":"10.1016/j.scitotenv.2025.179157","DOIUrl":"10.1016/j.scitotenv.2025.179157","url":null,"abstract":"<div><div>The excessive use of agrochemicals has caused significant negative environmental impacts, highlighting the growing need for more sustainable alternatives. Among these, aqueous composts extracts enable less harmful intensive agricultural practices. The objective of this study was to explore methods for stabilizing the biofertilizing microbiota of compost extracts and to evaluate their effects on drought and oxidative stress. For this, an aqueous extract was prepared from agri-food waste compost by suspending it in water at a 1:5 ratio and incubating the mixture for 14 days at room temperature. The physicochemical properties of the extract were analyzed. In addition, microorganisms associated with the biofertilizing capacity of the extract, which was formulated with various compounds were monitored over the course of one month storage at different temperatures. The bioformulations showing better biofertilizing potential were selected for testing on cucumber seedlings to evaluate their capability for promoting plant growth and alleviating oxidative stress. Additionally, a drought stress test was conducted on grass to evaluate the effect of applying the extract. The results of the physicochemical characterization and bacterial abundance showed a good nutritional composition and a rich microbiota with biofertilizing activity. In terms of microorganism counts under storage conditions, the most stable formulations were those formed by the extract supplemented with 2 % glycerol, as well as the extract without supplement (as extracted). Cucumber seedlings treated with the more stable extracts exhibited enhanced agronomic traits, particularly improved root development, and reduced oxidative stress. The root-promoting effect was also observed in the drought stress test, where grass seedlings subjected to 30 % soil moisture and treated with a combination of the extract with chemical fertilizer presented greater root development (around 5.50 g cm⁻³) compared to treatments lacking the extracts (around 2–3.30 g cm⁻³). These results suggest that aqueous compost extracts provide drought resistance and increased root development, offering a promising alternative to conventional mineral fertilization.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"974 ","pages":"Article 179157"},"PeriodicalIF":8.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}

{"title":"Observed CO2 concentration reveals steep decrease of anthropogenic emissions in winters of 2021 and 2022 in Hangzhou and Yangtze River Delta region, China","authors":"Cheng Hu ,&nbsp;Huili Liu ,&nbsp;Yifan Zhang ,&nbsp;Yu Cui ,&nbsp;Fan Sun ,&nbsp;Xuejing Shi ,&nbsp;Junqing Zhang ,&nbsp;Yanrong Yang ,&nbsp;Leying Zhang ,&nbsp;Bing Qi ,&nbsp;Qitao Xiao ,&nbsp;Ning Hu ,&nbsp;Timothy J. Griffis ,&nbsp;Wei Xiao","doi":"10.1016/j.scitotenv.2025.178884","DOIUrl":"10.1016/j.scitotenv.2025.178884","url":null,"abstract":"<div><div>After the initial prevention of COVID-19 in early 2020, China gradually lifted its control measures in the latter half of 2020, leading to a rebound in anthropogenic CO₂ emissions. However, the emergence of a COVID-19 variant in late 2021, particularly in densely populated and economically developed areas, prompted the reimplementation of stringent confinement measures. Furthermore, with the policy shift towards achieving “herd immunity”, China fully lifted pandemic control measures in December 2022, resulting in the unrestricted movement of residents and facilitating the widespread transmission of COVID-19 in the ensuing months. But to our knowledge, no studies have yet quantified the relative changes in CO₂ emissions during these successive phases, representing a significant knowledge gap in understanding the impact of varying control measures on anthropogenic CO₂ emissions at both city and regional scales. Consequently, we selected Hangzhou city and the Yangtze River Delta (YRD) region as our study area due to their status as economically developed and densely populated regions in China. In order to mitigate the influence of biological CO₂ flux, we utilized wintertime atmospheric CO₂ observations at two urban and rural sites, along with their gradient, across three years (December 2020–February 2023). We employed two distinct methods with the WRF-STILT model to quantify the relative changes in CO₂ emissions. Our findings indicate that (1) atmospheric CO₂ concentrations at both sites and their gradients in 2022 were significantly lower than those observed in 2020, with modeled simulations using consistent emissions suggesting that changes in emissions were the predominant factor rather than variations in atmospheric transport processes; (2) After applying the source region partition method, anthropogenic CO₂ emissions during the winter of 2021 decreased to 69.8 % ± 1.6 % in Hangzhou city when compared with 2020, while emissions in the YRD region dropped to 92.5 % ± 6.2 %. In winter 2022, emissions in Hangzhou city decreased to 79.9 % ± 1.9 %, and YRD region decreased to 82.0 % ± 7.2 % relative to 2020, highlighting substantial spatial heterogeneity from the city to the regional scale; (3) notably, the observed decreases in CO₂ emissions in both Hangzhou and the YRD were not reflected in <em>prior</em> inventories, which indicated an annual increase of 8 % for 2021 and 2022, suggesting that even the most recent inventories fail to account for the prolonged emission reduction effects occurring over the preceding three years.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"974 ","pages":"Article 178884"},"PeriodicalIF":8.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Spatiotemporal evolution and influencing factors of blue carbon resilience in the East Java, Indonesia","authors":"Purwanto Purwanto ,&nbsp;Achmad Siddik Thoha ,&nbsp;Pipit Wijayanti ,&nbsp;Ravinesh Rohit Prasad ,&nbsp;Rita Noviani ,&nbsp;Listyo Yudha Irawan ,&nbsp;Kresno Sastro Bangun Utomo ,&nbsp;Siti Nur Farihah ,&nbsp;Eva Indra Sofiana ,&nbsp;Moh. Wahyu Kurniawan Zain ,&nbsp;Corrie Teresia Purba ,&nbsp;Erisa Elvada","doi":"10.1016/j.scitotenv.2025.179128","DOIUrl":"10.1016/j.scitotenv.2025.179128","url":null,"abstract":"<div><div>Global climate change occurring in the 21st century is causing a series of unprecedented environmental problems. Preservation and rehabilitation of blue carbon ecosystems can be one of the real efforts to mitigate climate change. This study considers a systematic and comprehensive study in characterizing the spatiotemporal evolution of blue carbon, the distribution of carbon emission and carbon sequestration, blue carbon balance ratio, blue carbon resilience index, and revealing the mechanism of blue carbon resilience controlled by various controlling variables of mangrove ecosystems in East Java from 2000 to 2020. The results show that the rate of mangrove forest expansion is relatively stable under the situation of increasing expansion and intensification of anthropogenic activities. Carbon emission and carbon sequestration by mangroves increased gradually, with blue carbon balance ratio dominated by carbon surplus, and carbon deficit clustered in large mangrove areas with low amount of carbon emission. The blue carbon resilience index showed a decreasing trend during the study period, which could threaten the existence of mangrove ecosystems. Spatial econometric models such as the Spatial Durbin Model (SDM) can reveal the direct and indirect effects as well as the total spatial effects of mangrove ecosystem control variables on the level of blue carbon resilience during the study period, both in the short and long term. The SDM decomposition results are detailed in this article.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"973 ","pages":"Article 179128"},"PeriodicalIF":8.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Health of plateau soil environment: Corresponding relationship of heavy metals in different land use/cover types (LULCC)","authors":"Zhenghui Fu ,&nbsp;Yong Liu ,&nbsp;Xia Jiang ,&nbsp;Huaicheng Guo ,&nbsp;Shuhang Wang ,&nbsp;Zheng Li","doi":"10.1016/j.scitotenv.2025.179162","DOIUrl":"10.1016/j.scitotenv.2025.179162","url":null,"abstract":"<div><div>The study of land use and land cover change (LULCC) in the Qinghai Tibet Plateau is an important part of regional land science and global change science research. Due to their sensitive response to climate change, plateau lakes undergo changes in their surrounding land use types and soil physicochemical properties, which in turn affect soil environmental health. In the context of global climate change, more scholars are focusing on the relationship between climate change and the transformation of land use types, while research on the response relationship between land use types and pollutant accumulation at the end of the entire system is scarce. This study systematically analyzed the bioavailability and migration dynamics of heavy metals in soils of different land use types in the Qinghai Tibet Plateau watershed, providing solid data support for ecological protection and high-quality development of the plateau watershed, and offering new research ideas for water environment security in the Qinghai Tibet Plateau under the background of climate change.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"973 ","pages":"Article 179162"},"PeriodicalIF":8.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Postmortem examinations show human activity impacts over half of seabirds beach-cast in Brazil","authors":"Laura Baes ,&nbsp;Caroline Freitas Pessi ,&nbsp;Lauren Roman ,&nbsp;Henrique Chupil ,&nbsp;Priscilla Carla dos Santos Costa ,&nbsp;Carolina Reigada","doi":"10.1016/j.scitotenv.2025.179197","DOIUrl":"10.1016/j.scitotenv.2025.179197","url":null,"abstract":"<div><div>The Southern Atlantic Ocean is home to globally significant seabird populations, and off Brazil little is known about health condition in many species. Despite major known threats that these birds face (i.e., bycatch in fisheries, climate change, disease and pollution), plastic ingestion has become an emerging risk to seabirds, of which it is not clear how sublethal effects take part in the health of individuals that wash up along the coastline. Therefore, this study aimed to characterize seabird health of beach-cast seabirds in Brazil to understand how ingested plastic is related to cause of death and other pathologies. We reviewed complete postmortem examination records of 654 seabirds that beached between 2017 and 2021 in Southeastern Brazil. We identified a multitude of causes that lead to the beaching and death of wild seabirds, including natural and anthropogenic causes, and we also found that over half of analyzed seabirds were impacted by anthropogenic activity (fisheries, oil, plastic, and trauma). Fisheries foremost among them have been impacting seabirds in interactive ways, through bycatch, trauma, and by mismanaged associated debris. We found 5 % of birds that ingested plastic had potential debris obstruction in the gastrointestinal tract, and a possible relationship between ingested plastic and starvation either as a cause of death or as a pathological condition. This study highlights that seabird populations that beach in southeastern Brazil are subject to multiple and interacting threats from anthropogenic activities, providing recent data that can serve as baseline for awareness, conservation and public policies in the South Atlantic.</div></div>","PeriodicalId":422,"journal":{"name":"Science of the Total Environment","volume":"973 ","pages":"Article 179197"},"PeriodicalIF":8.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}