Environmental Monitoring and Assessment最新文献

{"title":"Assessment of radon level and the associated radiological risk from soil samples of quarry area at Hakim Gara, Ethiopia","authors":"Tadele Negash Regassa,&nbsp;Gelana Amente Raba,&nbsp;David Okoh Kpeglo","doi":"10.1007/s10661-024-13568-0","DOIUrl":"10.1007/s10661-024-13568-0","url":null,"abstract":"<div><p>Excavation of terrestrial surface of the Earth could enhance the chance of exposure to radon while gases in the underground get access to escape. This study was aimed to assess the level of radon concentration from soil samples of quarrying sites at Hakim Gara in Ethiopia using CR-39 detectors in sealed container technique. The results of the measured radon concentration level were ranging from 164.3 to 494.0 Bq/m³ with average value of 295.7 ± 87.09 Bq.m⁻³. The activity concentration value of radium ranging from 0.63 to 2.74 Bq.kg⁻¹ with average value of 1.59 ± 0.55 Bq.kg⁻¹. The radon surface exhalation rate ranging between 0.95 to 4.1 Bqm⁻² h⁻¹ with mean value of 2.38 ± 0.83 Bqm⁻² h⁻¹. The mass exhalation rate ranging between 0.01 and 0.11 Bqkg⁻¹ h⁻¹ with average 0.06 ± 0.03 Bqkg⁻¹ h⁻¹. The AED and ELCR values for the study area were calculated and the mean value of the quarry area were determined on the basis of altitude variation and found to be different for individual and group sample locations. Compared to values recommended by WHO for outdoor radon exposure, the measured levels of radon concentration were observed to be higher in the study area. But residential areas under construction in the area need further studies since the measured and calculated values were high for indoors in some soil samples.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10661-024-13568-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Preliminary analysis of the presence of metals and metalloids in cigarette butts and fibers discarded on a tourist beach in Cartagena, Colombia","authors":"Claudia Díaz-Mendoza,&nbsp;Javier Mouthon-Bello,&nbsp;Camilo M. Botero,&nbsp;Leonardo Gutiérrez","doi":"10.1007/s10661-024-13572-4","DOIUrl":"10.1007/s10661-024-13572-4","url":null,"abstract":"<div><p>Cigarette butts are classified as plastic waste due to their composition of cellulose acetate fibers and are commonly found in beach sand. Their persistence in the environment, low biodegradability, and potential to interact with metals and metalloids during the aging process make them a significant subject of interest for research on coastal marine ecosystems. The aim of this study is to investigate the presence of metals such as hexavalent chromium Cr (VI), cadmium (Cd), and the metalloid arsenic (As) in cigarette butts (CBs), cigarette butt fibers (CBFs), and sand on a tourist beach in Cartagena, Colombia. The goal is to establish a baseline for potential contamination on the beach due to these elements. The methodology includes collecting samples of CBs, CBFs, and sand from different beach usage zones (active, rest, and service) and conducting standardized laboratory tests using atomic absorption spectroscopy for As and Cd and the standard colorimetric method for Cr (VI). The main findings indicate that arsenic levels reached 7.69, 5.75, and 3.47 mg As/kg in the sand, CBs, and CBFs, respectively. Cadmium and hexavalent chromium were found to be below the detection limit for the applied methodology. Additionally, mercury was detected at a concentration of 0.37 mg Hg/L in CBFs in the active zone in October.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Impact of effluents from a closed mine on the surrounding water resources: Groundwater contamination of the historical abandoned mine site in Japan","authors":"Thaw Dar Wunn,&nbsp;Takahiko Arima,&nbsp;Walubita Mufalo,&nbsp;Takaya Hamai,&nbsp;Masao Okumura,&nbsp;Kyu Kyu Mar,&nbsp;Shingo Tomiyama,&nbsp;Toshifumi Igarashi","doi":"10.1007/s10661-024-13489-y","DOIUrl":"10.1007/s10661-024-13489-y","url":null,"abstract":"<div><p>The extraction of mineral deposits is often associated with the occurrence of acid mine drainage (AMD), which can persist even after mine closure due to remaining sulfide minerals. This study investigates a 200-year-old abandoned mine and its impacts on nearby water resources. The study area is well known for Kuroko ore deposits located upstream of spring and river water resources. To elucidate the impacts of the abandoned mine site, mine water and spring and river water samples were collected, and their geochemical properties were monitored between 2021 and 2022. Groundwater, seepage, and surface water at the mine site showed AMD characteristics with Ca²⁺–SO₄²⁻/Mg²⁺–SO₄²⁻ type. AMD-affected mine water showed a low pH range of 3.40–4.84, with elevated SO₄²⁻ of up to 326 mg/L. At the downstream of the mine site, one of the groundwater samples showed pH of 3.55 and average concentrations of 5.03 mg/L of Al, 2.06 mg/L of Cu, 2.06 mg/L of Fe, 0.42 mg/L of Pb, and 8.04 mg/L of Zn, inferring the contaminant transport. Saturation indices of the mine water also indicated that the solubility controlling phases, anglesite, gibbsite, ferrihydrite, and jarosite influence the concentrations of Al, Fe, and Pb at the mine site. Meanwhile, spring and river water samples showed Ca²⁺–HCO₃⁻, Ca²⁺–SO₄²⁻, and Na⁺–K⁺–HCO₃⁻ type with a circumneutral pH range of 5.59–8.02 and they were unaffected by AMD. The principal component analysis (PCA) of the spring and river water samples also showed higher loadings for Ca, Mg, NO₃⁻, and Cl⁻ reflecting the abundance of carbonate and evaporite minerals while the mine water and groundwater downstream showed higher loadings of Cl⁻, Fe, SO₄²⁻, and Zn. The results suggest that the past mining activities only influenced the mine site and groundwater downstream. Consequently, the fate and migration of contaminants in the downstream of the mine site should be evaluated in the near future.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Evaluation of drain quality and nutrient load management scenarios by using QUAL2kw model","authors":"Seyedeh Razieh Shabestani Abyaz,&nbsp;Jamal Mohammadvali Samani,&nbsp;Maryam Navabian","doi":"10.1007/s10661-024-13507-z","DOIUrl":"10.1007/s10661-024-13507-z","url":null,"abstract":"<div><p>The examination of wastewater and effluents flowing into receiving water bodies is crucial for identifying pollutant sources and implementing scenarios to reduce them. In this study, QUAL2kw was used to identify, assess, and predict the pollutant load of a drainage canal located 6 km away from Anzali Wetland. Initially, the model was calibrated and validated with data collected in 2017. The NRMSE of the values was mostly less than 20%, except for flow accounting for 37% during calibration. The model did well in simulating EC and ammonium levels, but there is room for improvement in predicting nitrate and inorganic P concentrations. Field visits and sampling were done during the rice growth period in April–June 2021. The model was simulated for a three-time series in 2021; the simulation showed that May was the most critical, as the levels of nitrates, ammonium, and phosphates were at their highest. This study focused on the employment of QUAL2kw to drainage canals, emphasizing its suitability for regions with limited data availability. Scenarios were employed to explore ways to enhance water resource quality, showcasing how targeted interventions can effectively mitigate nutrient loads. Scenarios were considered to reduce nutrient loads. Reducing the amount of fertilizer led to a 9–27% while applying water stress resulted in a 0.1–1% reduction in the discharge outflow from the drain and less than 1% reduction in the amount of ammonium and nitrate. It is concluded that reduction in fertilization is more efficient in reducing concentrations and pollutant loads at the exit point of the canal to water resources compared to applying water stress since urea fertilizer contains a high percentage of nitrogen, and declining water application can enhance the soil’s nutrient retention ability but only to a small degree.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Removal efficiencies and environmental risk assessment of selected pharmaceuticals and metabolites at a wastewater treatment plant in Pietermaritzburg, South Africa","authors":"Nikitha Inarmal,&nbsp;Brenda Moodley","doi":"10.1007/s10661-024-13515-z","DOIUrl":"10.1007/s10661-024-13515-z","url":null,"abstract":"<div><p>This research study critically evaluates the concentrations of selected pharmaceuticals found within wastewater and at various stages within a selected wastewater treatment plant. The study further investigates the effects of seasonal variation, between wet and dry months, on the removal of target analytes. To the best of the authors’ knowledge, ivermectin in wastewater has not been investigated in South Africa. The methodology used was extraction of the wastewater samples using solid phase extraction with Oasis HLB cartridges followed by analysis on a liquid chromatography-mass spectrometer. As expected, analyte concentrations were observed to decrease as wastewater went through the treatment process with the greatest reduction in concentrations observed between secondary effluent and maturation samples, which could be indicative of photodegradation of compounds. Influent concentrations of analytes ranged from 0.008184 to 1.243 mg L⁻¹ while maturation river concentrations ranged from not detected to 0.9286 mg L⁻¹. Removal efficiencies ranged from 7.70 to &gt; 99.99% of analyte removed. Significant differences in removals were observed between the wet and dry seasons experienced within the province. Environmental risk assessment ratios ranged from 0.0863 to 10.5 × 10⁸. Ratios for metformin and valsartan were well below 1, indicating that they would not be of environmental risk. While ratios for ivermectin were substantially high, ranging from 25.4 × 10⁷ to 10.5 × 10⁸ indicating that it is of severe environmental risk and is of significant concern. Generally, the analyte concentrations quantified within influent samples were higher than effluent samples which is indicative of the treatment process being able to partially remove some of the analytes. Risk assessment ratios suggest high risk of selected pharmaceuticals which are of environmental concern.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10661-024-13515-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"A novel hybrid model for air quality prediction via dimension reduction and error correction techniques","authors":"Rui Huang,&nbsp;Rui Hu,&nbsp;Huayou Chen","doi":"10.1007/s10661-024-13466-5","DOIUrl":"10.1007/s10661-024-13466-5","url":null,"abstract":"<div><p>The monitoring of air pollution through the air quality index (AQI) is a fundamental tool in ensuring public health protection. Accurate prediction of air quality is necessary for the timely implementation of measures to control and manage air pollution, thereby mitigating its detrimental impact on human health. A novel hybrid prediction model is proposed, which is EMD-KMC-EC-SSA-VMD-LSTM. Raw AQI index data are decomposed into intrinsic mode functions (IMFs) by empirical mode decomposition (EMD) method. Subsequently, sample entropy (SE) is utilized to assess the intricacy of IMFs, and K-means clustering (KMC) is used to reconstruct them into joint intrinsic mode functions (Co-IMFs). Then, the variational mode decomposition (VMD) is used to transform the complex Co-IMF0 into simpler IMFs. Long short-term memory (LSTM), optimized either by the Sparrow Search Algorithm (SSA), is applied to forecast all IMFs, generating the first prediction sequence. To further refine the forecasting, an error correction (EC) technique is adopted. The error sequence is obtained by subtracting the forecasting sequence from the raw sequence, which is then decomposed by EMD-SSA-VMD. Subsequently, SSA-LSTM is engaged to forecast the decomposed error sequence, generating the error forecasting sequence. Finally, the forecast outcomes are combined with the error predictions to generate the final AQI prediction sequence. The proposed approach undergoes validation across four urban centers and undergoes comparison against a set of eight prediction models. Experimental findings underscore the heightened precision of this hybrid forecasting model in predicting AQI metrics.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"The morphological dietary preferences of an outbreaking population of corallivorous crown-of-thorns sea stars (Acanthaster sp.) in the Gulf of Thailand","authors":"Gavin Miller,&nbsp;Piers Baillie,&nbsp;Getsamol Chaona,&nbsp;Enrico Montalbetti,&nbsp;Jasmine Ramshaw,&nbsp;Doris Aschauer","doi":"10.1007/s10661-024-13582-2","DOIUrl":"10.1007/s10661-024-13582-2","url":null,"abstract":"<div><p>The current study investigated the morphological dietary preferences of an outbreaking population of corallivorous crown-of-thorn sea stars (<i>Acanthaster</i> sp.) in Koh Tao, situated in the Gulf of Thailand. The local effects of such populations deemed to be in outbreak are currently poorly understood. Therefore, the aim of this study was to investigate the localised feeding behaviours of <i>Acanthaster</i> sp. within an outbreak population, so as to better understand the reefs vulnerable to future outbreaks. Data was collected over a 2-year period, using underwater visual census methods. Survey parameters included sea star abundance, as well as substrate composition and frequency of observed predation scarring. <i>Acanthaster</i> sp. populations were observed to consistently exceed regional outbreak definitions (34.4 individuals ha⁻¹), and demonstrated unimodal size distribution consistent with a primary outbreak. Analysis of feeding behaviour displayed some evidence to support previous claims of density-dependent predation within <i>Acanthaster</i> sp. populations. Van der Ploeg and Scavia tests of dietary preference appeared to suggest that <i>Acanthaster</i> sp. have a marked preference for coral morphologies belonging to tabular and arborescent coral types, and a strong avoidance for massive, laminar, submassive, and solitary coral morphs. Furthermore, <i>Acanthaster</i> sp. displayed a preference towards small coral colonies between 0 and 20 cm. This finding has potential significance for reef resilience and diversity within areas at risk of CoT outbreaks, and seemingly opposes previous literature in other regions. Overall, the current study displays a host of evidence shedding light on <i>Acanthaster</i> sp. ecology and dietary preferences within an outbreaking population density in the Gulf of Thailand. Moreover, there is clear evidence highlighting large spatial variation in the ecology of crown-of-thorns sea stars feeding ecology, and as such demonstrates the requirement for increased localised studies of <i>Acanthaster</i> sp. that accounts for environmental and ecological heterogeneity.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Environmental risk assessment of the surface sediments based on trace elements analysis from the largest freshwater lake in the southern slope of the Himalaya, Nepal","authors":"Binija Kaphle,&nbsp;Junbo Wang,&nbsp;Jianting Ju,&nbsp;Xinmiao Lü,&nbsp;Jinlei Kai,&nbsp;Leon Clarke,&nbsp;Binish Raj Khanal,&nbsp;Sima Humagain,&nbsp;Gaurav Srivastava,&nbsp;Khum Narayan Paudayal","doi":"10.1007/s10661-024-13566-2","DOIUrl":"10.1007/s10661-024-13566-2","url":null,"abstract":"<div><p>Freshwater ecosystems, including high-altitude lakes, can be affected by trace metal pollution derived from a mix of natural sources and anthropogenic activities. These pollutants often collect in surface sediments, with notable concentrations in the deeper areas of lakes. To evaluate the environmental risk associated with metal contaminated sediment in Rara Lake, southern Himalaya, surface sediment samples were systematically collected in November 2018, with a subsequent specific emphasis on determinations of trace element concentrations. Subsequent analysis revealed nine elements exhibiting a descending mean concentrations order: iron (Fe) &gt; manganese (Mn) &gt; chromium (Cr) &gt; rubidium (Rb) &gt; nickel (Ni) &gt; strontium (Sr) &gt; cobalt (Co) &gt; copper (Cu) &gt; cadmium (Cd), of 7205.55 mg kg⁻¹, 2290.34 mg kg⁻¹, 176.29 mg kg⁻¹, 153.78 mg kg⁻¹, 51.86 mg kg⁻¹, 44.61 mg kg⁻¹, 38.89 mg kg⁻¹, 29.11 mg kg⁻¹, and 0.10 mg kg⁻¹, respectively. Comparisons to sediment quality guidelines highlight that Mn, Cr, Cu, and Cd as significant threats to the aquatic ecosystem in Rara Lake. To assess the impact of metal pollution, enrichment factor (EF), geo-accumulation index (<i>I</i>_geo), pollution load index (PLI), and contamination factor (CF) were computed. All metals (except Cd) had <i>I</i>_geo value exceeding 5, displaying strong contamination. EF values for Mn, Cr, Co, and Ni metals were &gt; 10, indicating severe effects of anthropogenic influences. CF and PLI values also indicated significant pollution for most of the investigated sites. Elevated trace element concentrations have the potential to adversely affect water, sediment, and aquatic life, also potentially impacting nutrient cycling and microbial activity. This study enhances our understanding of the metal compositions within Rara Lake sediments and provides a basis for more effective lake management and pollution control strategies. Urgent action by regional governing bodies is crucial to address the early stages of metals pollution, including identification and controlling of pollution sources, by appropriate regulations, optimizing industrial practices, and remediating existing pollution to prevent further contamination and protect the lake ecosystem.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"The development of a waste management and classification system based on deep learning and Internet of Things","authors":"Zhikang Chen,&nbsp;Yao Xiao,&nbsp;Qi Zhou,&nbsp;Yudong Li,&nbsp;Bin Chen","doi":"10.1007/s10661-024-13595-x","DOIUrl":"10.1007/s10661-024-13595-x","url":null,"abstract":"<div><p>Waste sorting is a key part of sustainable development. To maximize the recovery of resources and reduce labor costs, a waste management and classification system is established. In the system, we use Internet of Things (IoT) and edge computing to implement waste sorting and the systematic long-distance information transmission and monitoring. A dataset of recyclable waste images with realistic backgrounds was collected, where the images contained multiple waste categories in a single image. An improved deep learning model based on YOLOv7-tiny is proposed to adapt to the realistic complex background of waste images. In the model, adding partial convolution (PConv) to Efficient Layer Aggregation Network (ELAN) module reduces parameters and floating point of operations (FLOPs). Coordinate attention (CA) is added to spatial pyramid pooling (Sppcspc) module and ELAN module, respectively. SIoU loss function is used, which improves the recognition accuracy of the model. The improved model shows a higher accuracy on the basis of lighter weight and is more suitable for deployment on edge devices. The proposed model and the original model were trained using our dataset, and their performance was compared. According to the experimental results, mAP@.5, mAP@.5:.95 of the improved YOLOv7-tiny are increased by 1.7% and 1.4%, and the parameter and FLOPs are decreased by 4.8% and 5%, respectively. The improved model has an average inference time of 110 ms and an FPS of 9 on the Jetson Nano. Hence, we believe that the developed system can better meet the needs of current garbage collection system.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Methane emissions from the riverine sandy wetlands on the Mongolia Plateau","authors":"Ang Li,&nbsp;Zun-Lan Luo,&nbsp;Katerina Machacova,&nbsp;Song Zhao,&nbsp;Jin-Chao Feng,&nbsp;Xing-Guo Han,&nbsp;Zhi-Ping Wang","doi":"10.1007/s10661-024-13488-z","DOIUrl":"10.1007/s10661-024-13488-z","url":null,"abstract":"<div><p>Methane (CH₄) processes and fluxes have been widely investigated in low-latitude tropical wetlands and high-latitude boreal peatlands. In the mid-latitude Mongolia Plateau, however, CH₄ processes and fluxes have been less studied, particularly in riverine wetlands. In this study, in situ experiments were conducted in the riverine sandy wetlands of the Mongolia Plateau to gain a better understanding of CH₄ emissions and their influencing mechanisms. Annual CH₄ emissions were observed at 8.7 mg m^–2 h^–1 from the flowing water wetlands during November 2019 − October 2021, approximately 80% and 20% of which were emitted during the growing and non-growing seasons, respectively. In particular, CH₄ emissions during the thawing period contributed &lt; 5% to the annual total, contrary to the traditional idea that thawing plays an important role in annual CH₄ emissions in boreal peatlands. CH₄ emissions were significantly higher in the wetlands dominated by plant species than in that dominated by water body during the growing seasons; therefore, plant-mediated CH₄ transport was explained as a favorable pathway for CH₄ emissions from sandy soils to the atmosphere. Gene sequencing revealed differences in the phylogenies and taxonomies of methanogenic archaea and methanotrophs between the flowing and static water wetlands, suggesting that flowing water should bring oxygen and nutrients to microbial habitats and potentially affect the production, oxidation, and diffusion of CH₄ in sandy wetlands. </p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10661-024-13488-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}