Marine environmental research最新文献

{"title":"The bioavailability and component characteristics of the aging dissolved organic matter (DOM) from the macroalgae Ulva prolifera in seawater","authors":"Xinyu Li ,&nbsp;Cui Zeng ,&nbsp;Xiurong Han ,&nbsp;Xiulin Wang ,&nbsp;Keqiang Li","doi":"10.1016/j.marenvres.2025.106946","DOIUrl":"10.1016/j.marenvres.2025.106946","url":null,"abstract":"<div><div>The world's largest green tide, caused by <em>Ulva prolifera</em>, in the Yellow Sea negatively affects the social and economic development of China's coastal region. The dissolved organic matter (DOM) released from <em>U. prolifera</em> is a potential threat to the offshore ecological health. The bioavailability and component characteristics of the DOM from <em>U. prolifera</em> vary at different aging stages in marine environments and are poorly understood. Here, a 1-year incubation experiment was conducted to understand this phenomenon. The bioavailable DOM (BDOM) mainly comprised the labile bioavailable DOM (LBDOM), which accounts for 58.7% (in dissolved organic nitrogen (DON)%) in the aging stages of 0–12 days. LBDOM mainly comprised three-dimensional fluorescent tyrosine B and tryptophan T components. The semi-labile bioavailable DOM (SLBDOM) accounted for 29.2% in the aging stages of 12–80 days, which mainly comprised fulvic acid C1 and A components. Both LBDOM and SLBDOM mainly contained amine groups in their structures. Conversely, the refractory bioavailable DOM (RBDOM) accounted for only 6.50% in the aging stages of 80–365 days. RBDOM mainly comprised a humin-like acid C2 component, whereas refractory dissolved organic matter (RDOM) mainly comprised humin-like acid C2, E, and fulvic acid A components, and the structures of both mainly included functional groups, such as hydroxyl, carboxyl, alkynyl, and aromatic rings. The hydrophobic component and dissolved organic carbon (DOC) proportion increased with the aging of DOM in seawater. Thus, the aging of DOM in seawater represents the processes of aromatization, hydrophobization, and humification, wherein the SUVA₂₅₄, SUVA₂₆₀, and humification index (HIX) increased by 55.7, 42.9, and 133.0%, respectively. The results of our study contribute to a deeper understanding of the ecological effects of DOM released during the extinction process of <em>U. prolifera</em> in the ocean.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"Article 106946"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142932035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution of organic matter and diatom frustules (diversity, flux) along the western Indian continental shelf related to contrasting physicochemical settings","authors":"Medhavi Pandey ,&nbsp;Haimanti Biswas ,&nbsp;Sabine Schmidt","doi":"10.1016/j.marenvres.2024.106940","DOIUrl":"10.1016/j.marenvres.2024.106940","url":null,"abstract":"<div><div>The western Indian continental shelf (eastern Arabian Sea) exhibits contrasting biogeochemical features. This area becomes highly productive due to summer monsoon-driven coastal upwelling in the south and winter monsoon-induced convective mixing in the north. Additionally, in the northern self, the eastern boundary of the Oxygen Minimum Zone (OMZ) persists but is absent in the south. Phytoplankton blooms are dominated by diatoms that contribute to sedimentary phytodetritus flux supplying major elements (C, N, Si) and food for benthic biota and hence important to address. Here we present the data on organic matter content, diatom frustule flux, abundance, and diversity using surface sediments (core tops collected using a multicorer) from 6 locations (11–21° N) along the shelf in a 2° interval at 200 m isobaths. The organic matter retrieved from the core top was relatively fresh (nearly ∼4.5 years old) as evident from ²¹⁰Pb profiles. Frustule abundance and diversity (the maximum at 15° N and minimum at 19° N) varied from 0.10–18.46 × 10⁴ valves g⁻¹ and 0.79–2.32, respectively. A total of 36 diatom genera were found with two centric (<em>Thalassiosira</em> and <em>Coscinodiscus</em>), and one pennate (<em>Nitzschia</em>) diatoms as major contributors. The higher contribution of <em>Thalassiosira</em> was observed throughout the shelf dominating the south (11, 13, 15° N), whereas, in the north (17, 19, 21° N) <em>Coscinodiscus</em> was dominant. The highest organic matter content (3.4%) and frustule abundance (18.46 × 10⁴ valves g⁻¹) were seen at 15° N despite low diatom valve flux (3.3 × 10³ valves cm⁻² yr⁻¹) and could be due to the influence of OMZ, where organic matter is well preserved. Contrarily, the upwelling-influenced station in the south (at 11° N) exhibited the highest diatom valve flux (10.14 × 10³ valves cm⁻² yr⁻¹), however low organic matter content (1.6 %) and frustule abundance (4.99 × 10⁴ valves g⁻¹) were attributed to faster mineralization. This study suggested that the preservation potential of organic matter varies across the shelf and is likely to control its recycling, impacting nutrient release and resources for the benthic community.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"Article 106940"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142984035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ocean acidification and its regulating factors in the East China Sea off the Yangtze River estuary","authors":"Qinyu Liu ,&nbsp;Bin Wang ,&nbsp;Yanyi Miao ,&nbsp;Dewang Li ,&nbsp;Haiyan Jin ,&nbsp;Jianfang Chen","doi":"10.1016/j.marenvres.2025.106960","DOIUrl":"10.1016/j.marenvres.2025.106960","url":null,"abstract":"<div><div>This study examines the seasonal variations in carbonate system parameters in the East China Sea (ECS) off the Yangtze River estuary (YRE) and analyzes the contributions of anthropogenic CO₂ and eutrophication to acidification. Carbonate parameters data were collected during summer 2019 and combined winter 2011. During winter, acidification is primarily driven by rising atmospheric CO₂, with minimal impact from biological processes. In contrast, summer presents a different pattern: enhanced photosynthesis due to eutrophication in surface waters helps mitigate the acidification effects of atmospheric CO₂ increases, while in bottom waters, the combined pressures of atmospheric CO₂ and intensified aerobic respiration leads to more severe acidification. Notably, biological processes now contribute more to acidification than increasing atmospheric CO₂ in the bottom waters. Our projections indicate that the summer bottom waters will experience the most pronounced acidification, with average pH levels expected to decline from 8.04 to 7.82 and aragonite saturation state (Ω_ar) values decreasing from 2.24 to 1.38 between 2000 and 2100. Additionally, our study indicates that winter acidification trends are also concerning, with pH only slightly higher than in summer bottom waters. The buffering capacity and the DIC:TA ratio play significant roles in determining the rate of future pH and Ω_ar declines. The strong buffering capacity in summer surface waters mitigates the pH decline, while the low DIC:TA ratio results in a rapid drop in Ω_ar.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"Article 106960"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relations between microplastic contamination and stress biomarkers under two seasonal conditions in wild carps, mullets and flounders","authors":"Alexandra Martins ,&nbsp;L. Gabriel Barboza ,&nbsp;Luis R. Vieira ,&nbsp;Maria João Botelho ,&nbsp;Carlos Vale ,&nbsp;Lúcia Guilhermino","doi":"10.1016/j.marenvres.2024.106925","DOIUrl":"10.1016/j.marenvres.2024.106925","url":null,"abstract":"<div><div>Potential effects of microplastics (MP, plastic particles &lt;5 mm) on the levels of multiple stress biomarkers were investigated in wild fish populations of <em>Cyprinus carpio, Mugil cephalus, Platichthys flesus</em> captured in the Minho River estuary located in the Iberian Peninsula. Specimens were collected in March and September 2018, corresponding to the end of winter and summer, respectively. Based on the concentration of MP determined by FT-IR analysis and morphological inspection, fishes from each species were divided into two groups: ≤0.1 MP g⁻¹ and &gt;0.1 MP g⁻¹. Biomarkers (general condition, neurotoxicity, biotransformation, oxidative stress) and the Integrated Biomarker Response (IBR) indicating fish general stress were determined. Fishes with more than 0.1 MP g⁻¹ showed elevated general stress (1.2- to 1.8-fold) relative to fish with ≤0.1 MP g⁻¹. Founders captured in March were the exception. Mullets were the most susceptible fishes to MP contamination by exhibiting poor physical condition, neurotoxicity, oxidative stress or damage, and carps were the most resilient. Low temperature and less chlorophylls (a proxy of food availability) observed in March appear to enhance the biological effects of MP.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"Article 106925"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fine-scale diazotroph community structure in the continental slope of the northern South China sea","authors":"Nan Liao ,&nbsp;Zhu Zhu ,&nbsp;Chunxue Wang ,&nbsp;Jun Sun ,&nbsp;Meng Zhou ,&nbsp;Ruifeng Zhang","doi":"10.1016/j.marenvres.2024.106926","DOIUrl":"10.1016/j.marenvres.2024.106926","url":null,"abstract":"<div><div>Diazotrophs have made significant contributions to marine nitrogen cycles. However, their distribution patterns and determined mechanisms have not been fully understood, particularly at the small regional scales. Here, the diazotrophic community structure by different sample sizes (0.2–10 μm and &gt;10 μm), evaluated using high-throughput sequencing of the <em>nifH</em> gene, and the abundance of four typical diazotroph phylotypes, estimated by quantitative PCR of the <em>nifH</em> gene, were investigated on the continental slope of the northern South China Sea at a horizontal spatial resolution of 47.19–71.63 km. The results showed that Proteobacteria and Cyanobacteria were the dominant diazotrophic groups, which mainly contributed by Gamma-proteobacteria and <em>Trichodesmium</em>, respectively. <em>Trichodesmium</em> occupied the large-particle samples in the surface water, while other diazotrophs were nonuniformly distributed across water depths, particle sizes, and stations, indicating the heterogeneous distribution of diazotrophs at fine scales. Vertical profiles of environmental factors, especially the profile data of Fe concentration, were investigated, and the results indicated that temperature, dissolved inorganic nitrogen, and N:Fe were strongly correlated to diazotroph abundance and distribution of <em>Trichodesmium</em> and γ-24774A11. In the transect influenced by the Pearl River plume, γ-24774A11 <em>nifH</em> gene abundance significantly decreased than in other stations, indicating the important role of Pearl River plume in shaping the diazotrophic community structure. These findings advance our understanding of diazotrophic biogeography at the smaller regional scales.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"Article 106926"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seasonal monitoring, ecological risk assessment, and prioritization of pharmaceuticals in a tropical semi-enclosed bay (Santos, São Paulo coast, Brazil)","authors":"Vinicius Roveri ,&nbsp;Luciana Lopes Guimarães ,&nbsp;Rafael Barreiros Kiyotani ,&nbsp;Wellington Rui Andrade de Assis Junior ,&nbsp;Ana Paula Metropolo ,&nbsp;Gilmar Aparecido dos Santos ,&nbsp;Aírton Zogaib Rodrigues ,&nbsp;Camilo Dias Seabra Pereira ,&nbsp;Alberto Teodorico Correia","doi":"10.1016/j.marenvres.2024.106889","DOIUrl":"10.1016/j.marenvres.2024.106889","url":null,"abstract":"<div><div>Research on the occurrence and seasonal monitoring of pharmaceutically active compounds (PhACs) in estuarine and coastal waters has intensified recently. However, few studies have been conducted with PhACs flowing into the marine waters of South America (such as Brazil). Against this backdrop, the aims of this study were: (i) evaluate, for the first time, the seasonal occurrence throughout a year and the potential ecological risks of ten selected PhACs in marine bathing waters from Santos Bay, São Paulo, Brazil (a tropical low-wave energy semi-closed bay); and (ii) develop a list of high-priority PhACs for the monitoring based on \"occurrence, persistence, bioaccumulation, and toxicity\" criteria (OPBT). Four water sampling campaigns were carried out throughout the four seasons of the year. The results showed that: (i) ten PhACs (namely, caffeine/CAF (87.20–567.23 ng/L); carbamazepine/CAR [below the limit of quantification (&lt;LOQ) to 3.42 ng/L]; citalopram/CIT (&lt;LOQ to 2.98 ng/L); acetaminophen/ACE (&lt;LOQ to 4.00 ng/L); diclofenac/DIC (&lt;LOQ to 5.17 ng/L); orphenadrine/ORP (&lt;LOQ to 3.92 ng/L); atenolol/ATE (&lt;LOQ to 2.98 ng/L); losartan/LOS (&lt;LOQ to 3.98 ng/L); enalapril/ENA (&lt;LOQ to 2.23 ng/L); and furosemide/FUR (&lt;LOQ to 3.24 ng/L), were found in Santos Bay; (ii) the \"mass gathering\" in Santos city during New Year holiday contributed significantly to increase the mass load of nine PhACs in marine waters; (iii) the ecological risk assessment revealed great environmental concern for the aquatic ecosystem, since the results suggest low to moderate risks of CAF, followed by LOS &gt; ACE &gt; DIC and CAR to algae, crustaceans, and fishes; (iv) Finally, regarding the OPBT ranking, the DIC was the highest-priority PhAC in Santos Bay, followed by: ORP &gt; LOS &gt; CIT &gt; CAR &gt; FUR &gt; ATE &gt; CAF &gt; ACE &gt; ENA.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"Article 106889"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142794501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Foraging in contrasting oceanographic regions impacts the fatty acid profile of two closely related pelagic seabirds","authors":"Maria I. Laranjeiro ,&nbsp;Tiago Simões ,&nbsp;Jaime A. Ramos ,&nbsp;Ivo dos Santos ,&nbsp;Jorge M. Pereira ,&nbsp;José M. Reyes-González ,&nbsp;Marco F.L. Lemos ,&nbsp;Vítor H. Paiva ,&nbsp;Sara C. Novais ,&nbsp;Joan Navarro ,&nbsp;Filipe R. Ceia","doi":"10.1016/j.marenvres.2024.106888","DOIUrl":"10.1016/j.marenvres.2024.106888","url":null,"abstract":"<div><div>Coastal urbanisation negatively affects marine ecosystems through habitat degradation and pollution. Cory's (<em>Calonectris borealis</em>) and Scopoli's (<em>C. diomedea</em>) shearwaters are closely related species inhabiting the Northeast Atlantic Ocean and the Mediterranean Sea, respectively. This study assesses the fatty acid profile, with the trophic and foraging ecology, of Cory's and Scopoli's shearwaters breeding at Berlenga (Atlantic Ocean) and Chafarinas (Mediterranean Sea) Islands. The diet quality of Scopoli's shearwaters is expected to be generally lower, characterised by reduced levels of ω-3 fatty acids. Additionally, higher concentrations of specific fatty acid trophic markers are anticipated, reflecting the Mediterranean's semi-enclosed environment, low productivity, and pollution challenges. These markers include oleic acid, vaccenic acid, <em>trans</em> fatty acids (indicative of urban and industrial discharges), and odd-chain fatty acids (indicative of bacterial presence). This study supported these predictions, with Scopoli's shearwaters foraging in the Mediterranean having higher concentrations of oleic and vaccenic acids, odd-chain fatty acids, and <em>trans</em>-palmitoleic acid in their plasma. Yet, concentrations of ω-3 were also higher in Scopoli's shearwaters. This may result from diverse prey availability and selection, and different habitat exploitation, partially supported by differences in the trophic ecology and foraging patterns of both species; or from an enhanced immunological basal response of Scopoli's shearwaters to cope with higher anthropogenic pressure in the western Mediterranean Sea. Further studies including specific diet and contaminant analyses are crucial to understand differences in fatty acid profiles of seabirds inhabiting both oceanic basins and the implications of diet quality for seabird populations.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"Article 106888"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142813678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Assessing spatial and temporal patterns of benthic bacterial communities in response to different sediment conditions.","authors":"Soraia Vieira, Helena Adão, Cláudia S L Vicente","doi":"10.1016/j.marenvres.2025.106963","DOIUrl":"https://doi.org/10.1016/j.marenvres.2025.106963","url":null,"abstract":"<p><p>Benthic bacterial communities are sensitive to habitat condition and present a fast response to environmental stressors, which makes them powerful ecological indicators of estuarine environments. The aim of this work is to study the spatial-temporal patterns of benthic bacterial communities in response to contrasting environmental conditions and assess their potential as ecological indicators of estuarine sediments. We characterized the diversity of bacterial communities in three contrasting sites on Sado Estuary (SW Coast, Portugal) and 4 sampling occasions, using 16S metagenomic approach. Based on previous studies, we hypothesized that diversity patterns of bacterial communities will be distinct between sites and across sampling occasions. Bacterial communities were more influenced by each site conditions than by temporal variations in the sediments. The main drivers of bacterial distribution were sediments' composition, organic contents, and hydrodynamic activity. This work provided an important baseline dataset from Sado estuary to explore bacterial networks concerning benthic ecosystem functioning.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"106963"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143374380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multivariate statistical analysis of surface water quality in the capibaribe river (Pernambuco state, Northeast Brazil): Contributions to water management","authors":"Jaqueline dos Santos Silva ,&nbsp;Livia Caroline Alexandre de Araújo ,&nbsp;Milena Danda Vasconcelos ,&nbsp;Iago José Santos da Silva ,&nbsp;Fabricio Motteran ,&nbsp;Rosner Henrique Alves Rodrigues ,&nbsp;Carina Lucena Mendes-Marques ,&nbsp;Rayanna Barroso de Oliveira Alves ,&nbsp;Hernande Pereira da Silva ,&nbsp;Maria Paloma Barros ,&nbsp;Sivoneide Maria da Silva ,&nbsp;Guilherme Malafaia ,&nbsp;Carlos Alonso Leite dos Santos ,&nbsp;Henrique Douglas Melo Coutinho ,&nbsp;Maria Betânia Melo de Oliveira","doi":"10.1016/j.marenvres.2024.106876","DOIUrl":"10.1016/j.marenvres.2024.106876","url":null,"abstract":"<div><div>Assessing the quality of surface waters is essential for identifying changes in freshwater ecosystems and supporting the planning/proposing of measures to mitigate polluting sources. However, many studies involving the identification of pathogenic bacteria and/or their resistance profile to antimicrobial agents need a more holistic approach to conditioning or modulating factors. Thus, we apply different multivariate statistical techniques to the data set from the Capibaribe River's surface water, one of the most important in the Northeast of Brazil. Our data, taken together, suggest that the waters of the Capibaribe River have been suffering impacts associated with different human activities. Due to its flow crossing a large urban area, different sources are contributing to the contamination/pollution of its aquatic ecosystem, whose multivariate analysis allowed us to identify site-dependent characteristics that reflect the degree and type of human influence. The study of physical-chemical and chemical parameters reveals the influence of the high load of effluents (industrial and domestic) on the chemical and microbiological quality of the waters sampled at the SS4 site. On the other hand, the antimicrobial resistance profile of the isolates evaluated, especially at SS1, SS2, and SS3 sites, provides a comprehensive sample of the “resistome” present in the fecal content of thousands of people living in the region surrounding the Capibaribe River. The presence of enterobacteria in water indicates contamination of fecal origin. It represents a public health problem since the waters of the Capibaribe River can be a source of dissemination and persistence of bacteria resistant to humans and the environment. In conclusion, our study provides a more comprehensive understanding of the relationships between surface water, basic sanitation, antibiotic exposure, bacterial gene transfer, and human colonization, whether in the context of the region studied or other locations.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"Article 106876"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142791571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predicted environmental concentration (PEC), environmental risk assessment (ERA) and prioritization of antiretroviral drugs (ARVs) in seawater from Guarujá (Brazilian coastal zone).","authors":"Leonardo Teixeira Ramos, Vinicius Roveri, Walber Toma, Rafael Barreiros Kiyotani, Wellington Rui Andrade de Assis Junior, Ana Paula Metropolo, Gilmar Aparecido Dos Santos, Aírton Zogaib Rodrigues, Luciana Lopes Guimarães","doi":"10.1016/j.marenvres.2025.106964","DOIUrl":"10.1016/j.marenvres.2025.106964","url":null,"abstract":"<p><p>The antiretroviral therapy program's success in managing the human immunodeficiency virus (HIV) has inadvertently led to the release of antiretrovirals (ARVs) into worldwide aquatic ecosystems. However, few studies investigated the risks of ARV loadings that flow continuously to the marine waters of South America (such as Brazil). Against this backdrop, the aims of this study were: (i) to estimate the Predicted Environmental Concentration (PEC) of thirteen ARVs worldwide used in HIV treatment, and which are frequently disposed of in the marine aquatic ecosystems of Guarujá, São Paulo coastline, Brazil.; (ii) predict, through the Environmental Risk Assessment (ERA), the potential acute and chronic risks of these ARVs; and (iii) create a prioritization list of the most hazardous ARVs, based on the intrinsic properties of these compounds, i.e.: occurrence (O); persistence (P), bioaccumulation (B) and toxicity (T) (OPBT criteria). The PEC calculations indicated that all the ARVs examined in this study require an assessment of their impact on aquatic organisms, as all results exceeded the limits set by the guidelines of the European Medicines Agency., i.e., the PEC ranged between 0.37 and 99.39 μg/L. The results of individual ERA showed the following trend: (i) 56.41% of the results of acute toxicity indicated high toxicity for the three trophic levels; 33.33% of the results indicated low risk for one of the trophic levels, and 10.26% indicated moderate toxicity, and (ii) in terms of chronic toxicity, 33.33% of the results indicated moderate risks, 35.90% indicated low or no risk, and 30.77% indicated high risks. Regarding the results of the mixture of ARVs, the ERA showed a high acute and/or chronic risk for all five classes tested, i.e., (i) nucleoside/nucleotide reverse transcriptase inhibitors; ii) non-nucleoside reverse transcriptase inhibitors; iii) protease inhibitors; (iv) integrase strand transfer inhibitors; and (v) chemokine receptor antagonists. Ultimately, the final ranking of the OPBT approach was etravirine (the highest-priority ARV in seawater from Guarujá), followed by: nevirapine > efavirenz > ritonavir > lopinavir > maraviroc > atazanavir > darunavir > abacavir > dolutegravir > zidovudine > tenofovir > lamivudine.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":"204 ","pages":"106964"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143023797","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}