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Physiochemical and biological characteristics of fouling on landfill leachate treatment systems surface

Journal of Environmental Sciences 2024年第1期135卷 59-71页

作者： Zhourui Gong Shu Yang Rui Zhang Yangqing Wang Xiaoqing Wu Liyan Song School of resources and environmental engineering Anhui UniversityHefei 230601China Anhui Shengjin lake wetland Ecology National Long-term Scientific research Base Dongzhi 247230China key laboratory of Three Gorges Reservoir Region’s Eco-Environment Ministry of EducationChongqing UniversityChongqing 400045China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China Xing Lu Huan Jing Co.LTD. Luzhou 646000China

Fouling of landfill leachate,a biofilm formation process on the surface of the collection system,migration pipeline and treatment system causes low efficiency of leachate transportation and treatment and increases cost for maintenance of those *** addition,landfill leachate fouling might accumulate pathogens and antibiotic resistance genes(ARGs),posing threats to the *** of the landfill leachate fouling and its associated environmental behavior is essential for the management of *** this study,physicochemical and biological properties of landfill leachate fouling and the possible accumulation capacity of pathogens and ARGs were investigated in nitrification(aerobic condition)and denitrification(anaerobic condition)process during landfill leachate biological treatment,*** show that microbial(bacterial,archaeal,eukaryotic,and viral)community structure and function(carbon fixation,methanogenesis,nitrification and denitrification)differed in fouling under aerobic and anaerobic conditions,driven by the supplemental leachate water *** fouling had a higher abundance of nitrification and denitrification functional genes,while anaerobic fouling harbored a higher abundance of carbon fixation and methanogenesis *** forms of leachate fouling had a higher abundance of pathogens and ARGs than the associated leachate,suggesting the accumulation capacity of fouling on biotic ***,aerobic fouling harbored three orders of magnitude higher multidrug resistance genes mex D than its associated *** finding provides fundamental knowledge on the biological properties of leachate fouling and suggests that leachate fouling might harbor significant pathogens and ARGs.

关键词： Landfill leachate fouling Biofilm Microbiome Carbon and nitrogen cycle Pathogens Antibiotic resistance genes

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The GNSS PWV retrieval using non-observation meteorological parameters based on ERA5 and its relation with precipitation

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Geodesy and Geodynamics 2024年第3期15卷 302-313页

作者： Weifeng Yang Zhiping Chen Kaiyun Lv Pengfei Xia Tieding Lu School of Surveying and Geoinformation Engineering East China University of TechnologyNanchang 330013China key laboratory of Mine Environmental Monitoring and Improving around poyang lake of Ministry of Natural Resources East China University of TechnologyNanchang 330013China State key laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China Jiangxi Province Engineering research Center of Surveying Mapping and Geographic InformationNanchang 330025China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China

The pressure and temperature significantly influence precipitable water vapor(PWV) retrieval. Global Navigation Satellite System(GNSS) PWV retrieval is limited because the GNSS stations lack meteorological sensors. First, this article evaluated the accuracy of pressure and temperature in 68 radiosonde stations in China based on ERA5 Reanalysis data from 2015 to 2019 and compared them with GPT3model. Then, the accuracy of pressure and temperature calculated by ERA5 were estimated in 5 representative IGS stations in China. And the PWV calculated by these meteorological parameters from ERA5(ERA5-PWV) were analyzed. Finally, the relation between ERA5-PWV and precipitation was deeply explored using wavelet coherence analysis in IGS stations. These results indicate that the accuracy of pressure and temperature of ERA5 is better than the GPT3 model. In radiosonde stations, the mean BIAS and MAE of pressure and temperature in ERA5 are-0.41/1.15 hpa and-0.97/2.12 K. And the mean RMSEs are 1.35 hpa and 2.87 K, which improve 74.77% and 40.58% compared with GPT3 model. The errors of pressure and temperature of ERA5 are smaller than the GPT3 model in bjfs, hksl and wuh2, and the accuracy of ERA5-PWV is improved by 18.77% compared with the GPT3 model. In addition, there is a significant positive correlation between ERA5-PWV and precipitation. And precipitation is always associated with the sharp rise of ERA5-PWV, which provides important references for rainfall prediction.

关键词： ERA5 GNSS Precipitable water vapor Precipitation Wavelet coherence analysis

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Monitoring Surface Water Change in Northeast China in 1999–2020:Evidence from Satellite Observation and Refined Classification

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Chinese Geographical Science 2024年第1期34卷 106-117页

作者： LIU Kai ZHANG Dapeng CHEN Tan CUI Peipei FAN Chenyu SONG Chunqiao key laboratory of watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing210008China University of Chinese Academy of Sciences Nanjing(UCASNJ)Nanjing211135China Geographic Information and Tourism College Chuzhou UniversityChuzhou239000China

As a typical region with high water demand for agricultural production,understanding the spatiotemporal surface water changes in Northeast China is critical for water resources management and sustainable ***,the long-term variation characteristics of surface water of different water body types in Northeast China remain rarely *** study investigated how surface water bodies of different types(e.g.,lake,reservoir,river,coastal aquaculture,marsh wetland,ephemeral water) changed during1999–2020 in Northeast China based on various remote sensing-based *** results showed that surface water in Northeast China grew dramatically in the past two decades,with an equivalent area increasing from 24 394 km^(2) in 1999 to 34 595 km^(2) in *** surge of ephemeral water is the primary driver of surface water expansion,which could ascribe to shifted precipitation *** wetlands,rivers,and reservoirs experienced a similar trend,with an approximate 20% increase at the interdecadal *** contrast,coastal aquacultures and natural lakes remain relatively *** study is expected to provide a more comprehensive investigation of the surface water variability in Northeast China and has important practical significance for the scientific management of different types of surface water.

关键词： surface water spatiotemporal variation water body classification remote sensing Northeast China

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2000-2020年中国建设用地扩张侵占耕地的时空特征及其与粮食产量的空间关系

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Journal of Geographical Sciences 2024年第5期34卷 855-870页

作者：李资华丁明军谢坤李静茹陈利文 Territorial Spatial Survey and Planning Institute Department of Natural Resources of Jiangxi ProvinceNanchang 330025China Engineering Technology Innovation Center for Ecological Protection and Restoration of Land Space in the Great lakes Basin Ministry of Natural ResourcesNanchang 330025China School of Geography and Environment Jiangxi Normal UniversityNanchang 330028China key Lab of poyang lake wetland and watershed research of Ministry of Education and School of Geography and Environment Jiangxi Normal UniversityNanchang 330028China Yuzhang Normal University Nanchang 330103China Nanjing Engineering Vocational College of Jiangsu Province Nanjing 211135China

Construction land expansion is a key driver of urbanization and industrialization,yet it poses the risk of losing farmland and cascading impacts on food *** spatial char-acteristics of farmland occupied by construction land and its association with grain yield in China were *** analyzed the characteristics of farmland converted into construction land,and its relationship with grain yield in China for *** land increased in area in central and western regions of China,and farmland decreased in area in south-eastern *** expansion of construction land in the North China Plain,Northeast China Plain,and the Loess Plateau,occurred at the expense of *** the southeast coast of China,grain yield increase was only weakly dependent on farmland *** in which farmland was converted into construction land and grain-yield change were highly coupled in southeastern coastal China,Sichuan Basin,Shandong Peninsula,and the Hu Huanyong *** should be noted that expansion in construction land area does have some influence on grain production;ultimately it is greatly affected by yield per unitarea.

关键词： construction land expansion change in farmland grain yield temporal and spatial variation Chinese counties

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Insight into the Permeability and Microstructure Evolution Mechanism of the Sliding Zone Soil: A Case Study from the Huangtupo Landslide, Three Gorges Reservoir, China

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Journal of Earth Science 2024年第3期35卷 941-954页

作者： Qianyun Wang Huiming Tang Pengju An Kun Fang Junrong Zhang Minghao Miao Qingwen Tan Lei Huang Shengming Hu Badong National Observation and research Station of Geohazards China University of GeosciencesWuhan 430074China Faculty of Engineering China University of GeosciencesWuhan 430074China Institute of Rock Mechanics Ningbo UniversityNingbo 315211China National and Provincial Joint Engineering laboratory for the Hydraulic Engineering Safety and Efficient Utilization of Water Resources of poyang lake Basin Nanchang Institute of TechnologyNanchang 330099China

A large number of laboratory investigations related to the permeability have been conducted on the sliding *** little attention has been paid to the particular sliding zones of the slideprone Badong ***,we experimentally investigate the permeability nature and the mechanism of seepage in the viscous sliding zone of the Huangtupo *** seepage tests have been performed first with consideration of six dry densities and thirteen hydraulic gradients,in conjunction with the mercury intrusion porosimetry test and scanning electron microscopy test for the microstructure analysis after *** results show that seepage in the sliding zone soil does not follow Darcy’s Law,since there is a threshold hydraulic gradient(i0)below which no flow is observed and a critical hydraulic gradient(icr)over which the hydraulic conductivity(K)tends to be *** percentage of bound water could be responsible for the occurrence of i0 and ***,pore size distributions(PSD)less than 0.6µm and between 10 and 90µm exhibit positive and negative correlations with the i0,respectively,indicating that the i0 is related to the *** mechanism accounting for this result is that pore water pressure forces fine clay particles into the surrounding large pores and converts arranged particles to discretely distributed ones,thereby weakening the connectivity of *** seepages in the sliding zones behave differently from that in the sliding mass and sliding bed in response to the permeability.

关键词： reservoir landslides sliding zone soil permeability microstructure seepage.

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WMO:an ontology for the semantic enrichment of wetland monitoring data

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International Journal of Digital Earth 2023年第1期16卷 2189-2211页

作者： Xin Xiao Hui Lin Chaoyang Fang School of Geography and Environment&key laboratory of poyang lake wetland and watershed research Ministry of EducationJiangxi Normal UniversityNanchangPeople's Republic of China

Rich observation data generated by ubiquitous sensors are vital for wetland monitoring,spanning from the prediction of natural disasters to emergency *** sensors use different data acquisition and description methods and,if combined,could provide a comprehensive description of the ***,these data remain hidden in isolated silos,and their variety makes integration and interoperability a significant *** this work,we develop a semantic model for wetland monitoring data using an agile and modular approach,namely,wetland monitoring ontology(WMO),which containsfive modules:wetland ecosystem,monitoring indicator,monitoring context,geospatial context,and temporal *** proposed ontology supports the semantic interoperability and integration of wetland monitoring data from multiple sources,domains,modes,and spatiotemporal *** also provide two real-world use cases to validate the WMO and demonstrate the WMO’s usability and reusability.

关键词： Ontology knowledge graph wetland monitoring semantic interoperability spatiotemporal data

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Occurrence of dark septate endophytes in Phragmites australis in the Baiyang lake and their resistance to Cd stress

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Pedosphere 2024年第2期34卷 484-496页

作者： Minghui XU Xia LI Qiannan YE Feng GONG Xueli HE School of Life Sciences Hebei UniversityBaoding 071002China key laboratory of Microbial Diversity research and Application of Hebei Province Hebei UniversityBaoding 071002China

Heavy metal pollution poses a serious hazard to human health,and microbial remediation of heavy metals in soil has been widely studied.A group of ascomycetes classified as dark septate endophytes(DSEs)colonize plant roots and benefit host plants under abiotic stress *** this study,Phragmites australis,a common remediation plant in the Baiyang lake in North China,was *** and roots of *** were collected in typical heavy metal-contaminated sites,and the species diversity and community structure of DSEs in *** roots were *** addition,DSE strains were isolated,cultured,and tested for their tolerance to Cd *** results showed that DSEs occurred extensively in *** roots,forming typical dark septate hyphae,with a total colonization rate of 19.7%–83.1%.Morphological and internal transcribed spacer sequencing analyses were used to identify 10 species within 9 genera of DSE *** these fungi,6 strains with considerable resistance to Cd stress were *** biomasses of Poaceascoma helicoides,Alternaria doliconidium,and Acrocalymma vagum strains increased as the Cd levels *** results can not only help to understand plant-DSE interactions in wetland environments,but also provide a theoretical basis for making full use of DSE fungi to alleviate heavy metal contamination in soil.

关键词： ascomycete colonization rate contaminated site evenness index heavy metal Shannon-Wiener index Simpson index wetland

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Spatial and Temporal Change of Habitat Quality of poyang lake Basin in China at Small watershed Scale and Its Multidimensional Response to Landscape Pattern

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Chinese Geographical Science 2023年第3期33卷 565-582页

作者： BI Manyu ZHONG Yexi XIAO Zeping FENG Xinghua MA Hongzhi School of Geography and Environment Jiangxi Normal UniversityNanchang 330022China key laboratory of poyang lake wetland and watershed research Ministry of Education(Jiangxi Normal University) Nanchang 330022China

The health and function of ecosystems are largely determined by the quality of habitat,and the optimal regulation of landscape patterns has become an important way to improve regional habitat *** article takes the poyang lake Basin of China as a case,reveals the spatial and temporal change of its habitat quality at the small watershed scale,and attempts to examine the multidimensional response of habitat quality to landscape pattern changes with respect to landscape compositions and landscape *** results show:1)from 2000 to 2020,the overall landscape fragmentation of the basin decreased,the landscape aggregation in the central small watersheds changed significantly,and the spatial distribution of landscape elements in the central and southern small watersheds were relatively homogeneous.2)The overall habitat quality of the poyang lake Basin is at a middle to high level,with significant spatial differentiation,showing the distribution characteristics of‘high in the periphery,low in the center,high in the south and low in the north’.3)Both landscape compositions and landscape configurations influenced habitat quality,but there were obvious differences in the response *** the landscape composition and configuration dimension,the influence of landscape composition on habitat quality was greater than that of landscape configuration;from the multilevel landscape configuration dimension,compared to landscape level,landscape configuration at the class level impacted habitat quality more *** the end,this article proposes a differentiated regulation strategy for habitat quality conservation in small watersheds from the perspective of landscape patterns to improve the ecological service level of poyang lake Basin.

关键词： landscape watershed Spatial

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Response mechanism of soil microorganisms to simulated precipitation in the source wetland of Qinghai lake

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Ecological Processes 2024年第2期 61-71页

作者： Xinye Wang Ni Zhang Kelong Chen Tiexi Chen Desheng Qi Yuanxi Ma School of Geographical Sciences Qinghai Normal University National Positioning Observation and research Station of Qinghai lake wetland Ecosystem in Qinghai National Forestry and Grassland Administration key laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation(Ministry of Education) Qinghai Normal University School of Geographical Sciences Nanjing University of Information Science and Technology Qinghai Provincial land spatial Planning research Institute

Background Changes in precipitation patterns crucially impact soil microbial communities, and the ecosystem in Qinghai-Tibet Plateau(QTP) is highly vulnerable to climate change. However, we do not fully understand how soil microbial communities in the source wetlands of QTP respond to changes in precipitation. In this study, we employed advanced techniques such as high-throughput sequencing and metabolomics to investigate how soil microbial communities in a source wetland of Qinghai lake respond to changes in precipitation after quadrennial precipitation *** Our findings showed that the predominant microbiota in the source wetland was Proteobacteria. Interestingly, alterations in precipitation levels, whether increased or reduced, did not significantly impact the diversity or functional groups of the microbial community. However, the structure of the microbial community did respond notably to changes in precipitation, leading to shifts in the relative abundance of Spirochaetes and Treponema. A notable finding was that reduced precipitation levels(– 25% and-50%) and mild increases in precipitation(25%) within the region contributed to increased soil carbon content. However, this effect ceased to manifest when precipitation increased by 50%. Additionally, the reduction in precipitation prompted the release of soil metabolites like syringic acid and aldosterone, while enhanced precipitation resulted in a decrease in aldosterone *** Precipitation changes altered the relative abundance of soil microbial communities and metabolites, which was conducive to increasing carbon storage in this alpine wetland.

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Colonization–competition dynamics of basal species shape food web complexity in island metacommunities

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Marine Life Science & Technology 2023年第2期5卷 169-177页

作者： Guanming Guo Fei Zhao Ivan Nijs Jinbao Liao Ministry of Education’s key laboratory of poyang lake wetland and watershed research School of Geography and EnvironmentJiangxi Normal UniversityNanchang 330022China research Group in Plants and Ecosystems Department of BiologyUniversity of Antwerp2610 WilrijkBelgium

Exploring how food web complexity emerges and evolves in island ecosystems remains a major challenge in *** webs assembled from multiple islands are commonly recognized as highly complex trophic networks that are dynamic in both space and *** the context of global climate change,it remains unclear whether food web complexity will decrease in a monotonic fashion when undergoing habitat destruction(e.g.,the inundation of islands due to sea-level rise).Here,we develop a simple yet comprehensive patch-dynamic framework for complex food web metacommunities subject to the competition-colonization tradeof between basal *** found that oscillations in food web topological complexity(characterized by species diversity,mean food chain length and the degree of omnivory)emerge along the habitat destruction *** outcome is robust to changing parameters or relaxing the assumption of a strict competitive *** oscillations in food web complexity indicates that small habitat changes could have disproportionate negative efects on species diversity,thus the success of conservation actions should be evaluated not only on changes in biodiversity,but also on system robustness to habitat ***,this study provides a parsimonious mechanistic explanation for the emergence of food web complexity in island ecosystems,further enriching our understanding of metacommunity assembly.

关键词： Competition-colonization tradeof Food web complexity Hierarchical competition Patch-dynamic framework Patch loss

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