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Occurrence and risk assessment of azole fungicides during the urban water cycle:A year-long study along the yangtze river,China

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Journal of Environmental Sciences 2024年第7期141卷 16-25页

作者： Yangyang Zhang Xinjie Gu Xiuwen Li Qiuyun Zhao Xiaodong Hu Rui Huang Jixiong Xu Zilong Yin Qing Zhou Aimin Li Peng Shi State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Jiangsu Province Hydraulic Research Institute Nanjing 210023China

Azole fungicides(AFs)play an important role in the prevention and treatment of fungal diseases in agricultural ***,limited studies are addressing the fate and ecological risk of AFs in the urban water cycle at a large watershed *** address this gap,we investigated the spatiotemporal distribution and ecological risk of twenty AFs in the lower reaches of the yangtze river across four ***(CBA),tebuconazole(TBA),tricyclazole(TCA),and propiconazole(PPA)were found to be the dominant *** highest concentrations were measured in January(188.3 ng/L),and November(2197.1 ng/L),July(162.0 ng/L),and November(1801.9 ng/L),*** comparison between wastewater treatment plants(WWTPs)effluents and surface water suggested that industrial WWTPs are major sources of AFs in the yangtze *** particular,TBA and PPA were found to be the most recalcitrant AFs in industrial WWTPs,while difenoconazole(DFA)was found to be the most potent pollutant in municipal WWTPs,with an average removal rate of less than60%.The average risk quotient(RQ)for the entire AFs was 6.45 in the fall,which was higher than in January(0.98),April(0.61),and July(0.40).This indicates that AFs in surface water posed higher environmental risks during the dry ***,the exposure risk of AFs via drinking water for sensitive populations deserves more *** study provides benchmark data on the occurrence of AFs in the lower reaches of the yangtze river,and offers suggestions for better reduction of AFs.

关键词： Azole fungicides Spatiotemporal distribution Ecological risk Urban water cycle the yangtze river

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Distinct community assembly processes underlie significant spatiotemporal dynamics of abundant and rare bacterioplankton in the yangtze river

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Frontiers of Environmental Science & Engineering 2022年第6期16卷 145-158页

作者： Malan Yi Yao Fang Guoping Hu Shufeng Liu Jinren Ni Tang Liu College of Environmental Sciences and Engineering Peking UniversityKey Laboratory of Water and Sediment Sciences(Ministry of Education)Beijing 100871China Fluid Science and Resources Division Department of Chemical EngineeringThe University of Western AustraliaCrawleyWA 6009Australia College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China State Environmental Protection Key Laboratory of All Material Fluxes in river Ecosystems Peking UniversityBeijing 100871China

The rare microbial biosphere provides broad ecological services and resilience to various ***,the biogeographical patterns and assembly processes of rare bacterioplankton communities in large rivers remain *** this study,we investigated the biogeography and community assembly processes of abundant and rare bacterioplankton taxa in the yangtze river(China)covering a distance of 4300 *** results revealed similar spatiotemporal patterns of abundant taxa(AT)and rare taxa(RT)at both taxonomic and phylogenetic levels,and analysis of similarities revealed that RT was significantly influenced by season and landform than ***,RT correlated with more environmental factors than AT,whereas environmental and spatial factors explained a lower proportion of community shifts in RT than in *** steeper distance–decay slopes in AT indicated higher spatial turnover rates of abundant subcommunities than rare *** null model revealed that both AT and RT were mainly governed by stochastic ***,dispersal limitation primarily governed the AT,whereas the undominated process accounted for a higher fraction of stochastic processes in *** flow and suspended solids mediated the balance between the stochastic and deterministic processes in *** spatiotemporal dynamics and assembly processes of total taxa were more similar as AT than *** study provides new insights into both significant spatiotemporal dynamics and inconsistent assembly processes of AT and RT in large rivers.

关键词： Rare taxa Biogeography Community assembly Bacterioplankton the yangtze river

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Changes in fish resources 5 years after implementation of the 10-year fishing ban in the Chishui river, the first river with a complete fishing ban in the yangtze river Basin

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Ecological Processes 2023年第4期12卷 54-73页

作者： Fei Liu Zixin Wang Zhijun Xia Jianwei Wang Huanzhang Liu Institute of Hydrobiology Chinese Academy of Sciences Dalian Ocean University

Background To rehabilitate the depleted fish resources of the yangtze river Basin, China, a 10-year fishing ban has been implemented. This national initiative has attracted worldwide attention. The present study aimed to explore the ecological process and recovery effectiveness of this complete fishing ban in the Chishui river, the first river where the fishing ban was enacted in the yangtze river Basin. Changes in fish resources were analyzed based on investigations conducted 5 years before(2012–2016) and 5 years after(2017–2021) the implementation of the fishing ban in four reaches along the longitudinal *** A total of 140 fish species, including 127 native and 13 exotic species, were collected during the study period. The number of fish species as well as the diversity indices showed no significant temporal changes. However, 11 native species that had disappeared for many years appeared again after the fishing ban. The occurrence rates of some key protected species, Procypris rabaudi, Acipenser dabryanus, Euchiloglanis davidi and Myxocyprinus asiaticus, increased after the fishing ban, while Coreius guichenoti, Percocypris pingi, Onychostoma angustistomata and Leptobotia rubrilabris showed no obvious recovery. The fish assemblage structure in nearly all reaches(except the headwater) showed significant temporal changes with an increase in the relative abundance of larger body-sized species. The population structure of most dominant species improved greatly with the mean standard length and the mean body weight as well as the proportion of larger-sized individuals clearly increasing. In addition, the density of fishes changed dramatically with the catch per unit effort(CPUE) increasing by 140–210% for different study *** The present study confirmed that the complete fishing closure is an effective measure to facilitate fish resources recovery. These results provide valuable references for evaluating the effectiveness of the 10-year fish

关键词： the yangtze river Fishing ban The Chishui river Fish resources Biodiversity conservation

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Molecular evidence on the presence of Schistosoma japonicum infection in snails along the yangtze river, 2015–2019

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Infectious Diseases of Poverty 2022年第3期11卷 54-62页

作者： Yin-Long Li Hui Dang Su-Ying Guo Li-Juan Zhang Yun Feng Song-Jun Ding Xiao-Wei Shan Guang-Ping Li Min Yuan Jing Xu Shi-Zhu Li National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention(Chinese Center for Tropical Diseases Research)Shanghai200025People’s Republic of China NHC Key Laboratory of Parasite and Vector Biology Shanghai200025People’s Republic of China WHO Collaborating Centre for Tropical Diseases Shanghai200025People’s Republic of China National Center for International Research on Tropical Diseases Shanghai200025People’s Republic of China Jiangsu Provincial Institute of Schistosomiasis Control WuxiJiangsu Province214064People’s Republic of China Anhui Provincial Institute of Schistosomiasis Control HefeiAnhui Province230061People’s Republic of China Hubei Provincial Institute of Schistosomiasis Control Hubei Center for Disease ControlWuhanHubei Province430079People’s Republic of China Hunan Provincial Institute of Schistosomiasis Control Hunan Province 414000YueyangPeople’s Republic of China Jiangxi Provincial Institute of Parasitic Disease NanchangJiangxi Province330006People’s Republic of China

Background: Due to sustained control activities,the prevalence of Schistosoma japonicum infection in humans,livestock and snails has decreased significantly in ***,and the target has shifted from control to elimination according to the Outline of Healthy China 2030 *** highly sensitive methods to explore the presence of *** infection in its intermediate host will benefit to assess the endemicity or verify the transmission interruption of schistosomiasis *** aim of this study was to access the presence of *** infection by a loop-mediated isothermal amplification(LAMP)method through a 5-year longitudinal study in five lake provinces along the yangtze ***: Based on previous epidemiological data,about 260 villages with potential transmission risk of schistosomiasis were selected from endemic counties in five lake provinces along the yangtze river annually from 2015 to *** surveys were conducted in selected villages by systematic sampling method and/or environmental sampling method each *** live snails collected from field were detected by microscopic dissection method,and then about one third of them were detected by LAMP method to assess the presence of *** infection with a single blind *** infection rate and nucleic acid positive rate of schistosomes in snails,as well as the indicators reflecting the snails’distribution were calculated and ***'s exact test was used to examine any change of positive rate of schistosomes in snails over ***: The 5-year survey covered 94,241 ha of environment with 33,897 ha of snail habitats detected *** 145.3 ha new snail habitats and 524.4 ha re-emergent snail habitats were found during 2015–*** percentage of frames with snails decreased from 5.93%[45,152/761,492,95%confidence intervals(CI):5.88–5.98%]in 2015 to 5.25%(30,947/589,583,95%CI:5.19–5.31%)in 2019,while the mean density of living snails fluctuated but pr

关键词： Schistosomajaponicum Dissection Loop-mediated isothermal amplification the yangtze river Transmission risk Low endemic area

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Estrogenic effects of water from the yangtze river (Nanjing section) on goldfish (Carassius auratus) after an early life stage exposure

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Journal of Environmental Sciences 2011年第7期23卷 1179-1185页

作者： Wenting Song Guanghua Lu Pengde Qi Chao Wang Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education College of Environment Hohai University Nanjing 210098 China School of Physics and Chemistry Henan Polytechnic University Jiaozuo 454000 China

Effects of river water from the yangtze river （Nanjing section） on fish development, vitellogenin （VTG） induction, gonado-somatic index （GSI） and sex ratio were investigated by exposing goldfish （Carassius auratus） in the early life stage （from fertilization to 28 days post-hatch） to water samples （25%, 50% and 100%） collected from three representative sections. The results showed that there was no significant effect on hatching success for any of the exposure groups, but survival was significantly reduced when compared with the control （P 0.05）. Body lengths, weights of all treated fish did not differ significantly from those of the control. Condition factors （CF） of larval fish exposed to 50% and 100% river water from the Jiangxinzhou section and 100% river water from the Daqiao section were significantly lower than that of the control （P 0.05）. VTG inductions were significant in larval fish exposed to all the dilution series of river water. No significant difference in CF value was observed in any exposure group after 150 days of depuration. VTG was fully eliminated after 75 days of depuration. For both female and male, GSI did not significantly differ between exposure groups and the control after 150 days of convalescence. The highest female：male ratios were observed in response to the treatment with 50% or 100% river water from the Jiangxinzhou section and 100% river water from the Daqiao section （53：47, 56：44 and 54：46, respectively）, but no significant difference in sex ratio was observed in any treated group when compared to the control. The results showed that early life stage exposure of river water from the yangtze river （Nanjing section） had adverse effects on goldfish development and reproductive health, and the effects on CF and VTG were reversible after depuration in clean water.

关键词： the yangtze river estrogenic effects goldfish early life stage exposure

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Changes of Frequency of Summer Precipitation Extremes over the yangtze river in Association with Large-scale Oceanic-atmospheric Conditions

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Advances in Atmospheric Sciences 2011年第5期28卷 1118-1128页

作者：王毅严中伟 National Meteorological Center Beijing 100081 Key Laboratory of Regional Climate-Environment Research for Temperate East Asia Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029

Changes of the frequency of precipitation extremes （the number of days with daily precipitation exceeding the 90th percentile of a daily climatology,referred to as R90N） in summer （June-August） over the mid-lower reaches of the yangtze river are analyzed based on daily observations during *** first singular value decomposition （SVD） mode of R90N is linked to an ENSO-like mode of the sea surface temperature anomalies （SSTA） in the previous *** of different grades of precipitation events to the climatic mode are *** is notable that the frequency of summer precipitation extremes is significantly related with the SSTA in the Pacific,while those of light and moderate precipitation are *** is suggested that the previously well-recognized impact of ENSO on summer rainfall along the yangtze river is essentially due to a response in summer precipitation extremes in the region,in association with the East Asia-Pacific （EAP） teleconnection pattern.A negative relationship is found between the East Asian Summer Monsoon （EASM） and precipitation extremes over the mid-lower reaches of the yangtze *** contrast,light rainfall processes are independent from the SST and EASM variations.

关键词： precipitation extremes ENSO East Asian Summer Monsoon the yangtze river

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Distinguishing different subclasses of water bodies for long-term and large-scale statistics of lakes:a case study of the yangtze river basin from 2008 to 2018

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International Journal of Digital Earth 2021年第2期14卷 202-230页

作者： Jin Luo Zeqiang Chen Nengcheng Chen State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanPeople’s Republic of China

Long-term and large-scale lake statistics are meaningful for the study of environment change,but many of the existing methods are labourintensive and *** overcome this problem,a novel method for long-term and large-scale lake extraction by shape-factorsand machine-learning-based water body classification is *** experiment was conducted to extract the lakes in the yangtze river basin(YRB)from 2008 to 2018 with the Joint Research Centre’s Global Surface Water Dataset(JRC GSW)data and OSM *** results show:1)The proposed method is automatically and successfully executed.2)The number of river–lake complexes is between 3008 and 4697,representing 3.56%–5.70%of the total water bodies.3)The areas of the lakes and rivers in the YRB were obtained,and the accuracy of water classification in each year was stable between 90.2%and 93.6%.Comparing the back propagation neural network,random forest,and support vector machine models,we found that the three machine learning models have similar classification accuracy for the scenario.4)Fragmented and incomplete small rivers in the JRC GSW data,unchecked training samples,and overlapped shape factors are the three error *** work will focus on addressing these three error sources.

关键词： Lake extraction water bodies classification the yangtze river shape metrics machine learning

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Risk assessment of heavy metals in topsoil along the banks of theyangtze river in Huangshi, China

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Journal of Groundwater Science and Engineering 2017年第2期5卷 162-172页

作者： LIN Dan JIN Meng-gui LI Xiu-juan College of Civil Engineering and Architecture Zhejiang University Hangzhou 310058 China Laboratory of Basin Hydrology and Wetland Eco-restoration & School of Environmental Studies China University of Geosciences Wuhan 430074 China Zhejiang Institute of Geology and Mineral Resources Hangzhou 310007 China Guangdong Province Geological Environmental Monitoring Station Guangzhou 510510 China

High concentrations of heavy metal in farmland threatens food production and human health. Our study assesses soil quality and the distribution of Cd, Cr, Cu, Zn, Pb and Ni, to identify possible sources of heavy metals along the banks of the yangtze river in Huangshi. Heavy metal concentrations of 22 topsoil samples were measured using the inductively coupled plasma mass spectrometry instrument and data was analyzed by multivariate statistic approaches. Heavy metal contamination risk assessment was performed using a combination of the Nemerow multi-factor index method, the Hakanson potential ecological risk index method and the Muller index of geo-accumulation method. These methods determined similar results indicating that cadmium(Cd) poses a health risk to residents at the study site while Cr, Cu, Zn, Pb and Ni do not. The Nemerow multi-factor index method demonstrated that 18 samples were heavily polluted, three moderately polluted and one lightly polluted. The Muller index of geo-accumulation method found ten samples were moderately to strongly polluted by Cd, five were moderately polluted, six were lightly to moderately polluted and one was lightly polluted. The Hakanson potential ecological risk index method proved six samples were strongly polluted, seven were moderately polluted and nine were lightly polluted. Since our sampling sites were all in agricultural lands, we recommend the potential ecological risk index method as the most effective given it not only considers the range of pollutants contributing to soil pollution but factors in heavy metals toxicity. We are apt that the source of the high concentrations of Cd found in topsoil is derived from alluvial sediments upstream of the yangtze river with a high percentage of residual speciation and a low percentage of exchangeable speciation distribution of Cd. This in turns indicates that a high concentration of Cd in soil had little impact on the natural environment. However, 31.9% of the iron-manganese o

关键词： Heavy metals Risk assessment Soil chemical analysis the yangtze river Huangshi

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FLOOD ROUTING MODELS IN CONFLUENT AND DIVIDING CHANNELS

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Applied Mathematics and Mechanics(English Edition) 2004年第12期25卷 1333-1343页

作者：范平李家春刘青泉 DES Institute of Mechanics CAS Beijing 100080P.R.China

By introducing a water depth connecting formula, the hydraulic equations in the dividing channel system were coupled and the relation of discharge distribution between the branches of the dividing channels can be yielded. In this manner, a numerical model for the confluent channels was established to study the variation of backwater effects with the parameters in the channel junction. The meeting of flood peaks in the mainstream and tributary can be analyzed with this *** flood peak meeting is found to be a major factor for the extremely high water level in the mainstream during the 1998 yangtze river flood. Subsequently the variations of discharge distribution and water level with channel parameters between each branch in this system were studied as well. As a result, flood evolution caused by Jingjiang river shortcut and sediment deposition in the entrance of dividing channels of the yangtze river may be qualitatively *** is suggested to be an effective measure for flood mitigation to enhance regulation capability of reservoirs available upstream of the tributaries and harness branch entrance channels.

关键词： confluent channels dividing channels backwater effect flood peak meeting the yangtze river

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Elemental composition in the sediments of the yangtze and the Yellow rivers and their tracing implication

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Progress in Natural Science:Materials International 2000年第8期 54-60页

作者：杨守业李从先 China Laboratory of Marine Geology Shanghai 200092 Tongji University

Elemental compositions in the surface sediments of the yangtze river and the Yellow river are quite different. the yangtze river’ s sediment is rich in K, Fe, Mg, Al and most of trace elements, and its elemental composition show remarkable spatial variations, whereas the Yellow river’s sediment has higher contents of Ca, Na, Sr, Ba, Zr and Hf, and the elemental composition remains relatively stable. The ratios of some elements are also different in the sediments of the two rivers. The elemental composition of the yangtze river sediment results from widely distributed igneous rocks and complicated source rocks and strong chemical weathering in the yangtze river catchment basin, while the main provenance of the Yellow river sediment is the Loess Plateau which has dominant influence on the elemental composition, and the intense physical weathering is another controlling factor. The elements such as Cu, Zn, Sc, Ti, Fe, V, Ni, Cr, Co, Li and element ratios such as La/Sc, La/Co, Th/Co, Ti/Zr and Zr/Y can be u

关键词： the yangtze river the Yellow river surface sediment elemental composition tracing element.

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