检索结果-内蒙古大学图书馆

Assessing mechanisms for microbial taxa and community dynamics using process models

mLife 2023年第3期2卷 239-252页

作者： Linwei Wu Yunfeng Yang Daliang Ning Qun Gao Huaqun Yin Naija Xiao Benjamin YZhou Si Chen Qiang He Jizhong Zhou Institute of Ecology Key Laboratory for Earth Surface Processes of the Ministry of EducationCollege of Urban and Environmental SciencesPeking UniversityBeijingChina Institute for Environmental Genomics University of OklahomaNormanOKUSA Department of Microbiology and Plant Biology University of OklahomaNormanOKUSA State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijingChina School of Minerals Processing and Bioengineering Central South UniversityChangshaChina Department of Mathematics Lunt HallNorthwestern UniversityEvanstonIllinoisUSA Department of Civil and Environmental Engineering The University of TennesseeKnoxvilleTennesseeUSA Institute for a Secure and Sustainable Environment The University of TennesseeKnoxvilleTennesseeUSA School of Civil Engineering and Environmental Sciences University of OklahomaNormanOklahomaUSA Earth and Environmental Sciences Lawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA School of Computer Science University of OklahomaNormanOKUSA

Disentangling the assembly mechanisms controlling community composition,structure,distribution,functions,and dynamics is a central issue in *** various approaches have been proposed to examine community assembly mechanisms,quanti-tative characterization is challenging,particularly in microbial ***,we present a novel approach for quantitatively delineating community assembly mechanisms by combining the consumer–resource model with a neutral model in stochastic differential *** time-series data from anaerobic bioreactors that target microbial 16S rRNA genes,we tested the applicability of three ecological models:the consumer–resource model,the neutral model,and the combined *** results revealed that model performances varied substantially as a function of population abundance and/or process *** combined model performed best for abundant taxa in the treatment bioreactors where process conditions were *** contrast,the neutral model showed the best performance for rare *** analysis further indicated that immigration rates decreased with taxa abundance and com-petitions between taxa were strongly correlated with phylogeny,but within a certain phylogenetic distance *** determinism underlying taxa and community dynamics were quantitatively assessed,showing greater determinism in the treatment bioreactors that aligned with the subsequent abnormal system *** its mechanistic basis,the framework developed here is expected to be potentially applicable beyond microbial ecology.

关键词： community assembly mechanisms consumer-resource model neutral model species dynamics

来源：评论

学校读者我要写书评

暂无评论

Coarse Particles Compensate for Missing Daytime Sources of Nitrous Acid and Enhance Atmospheric Oxidation Capacity in a Coastal Atmosphere

SSRN

引用

SSRN 2023年

作者： Tang, Meng-Xue He, Ling-Yan Xia, Shi-Yong Jiang, Zhen He, Dong-Yi Guo, Song Hu, Ren-Zhi Zeng, Hui Huang, Xiao-Feng Key Laboratory for Urban Habitat Environmental Science and Technology Peking University Shenzhen Graduate School Shenzhen518055 China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing100871 China Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics HFIPS Chinese Academy of Sciences Hefei230031 China

Large missing sources of daytime atmospheric nitrous acid (HONO), a vital source of hydroxyl radicals (OH) through its photolysis, frequently exist in global coastal regions. In this study, ambient HONO and relevant species were measured at a coastal site in the Pearl River Delta (PRD), China, during October 2019. Relatively high concentrations (0.32±0.19 ppbv) and daytime peaks at approximately 13:00 of HONO were observed, and HONO photolysis was found to be the dominant (55.5%) source of the primary OH production. A budget analysis of HONO based on traditional sources suggested large unknown sources during the daytime (66.4%), which had a significant correlation with the mass of coarse particles (PM2.5-10) and photolysis frequency (J(NO2)). When incorporating photolysis of the abundant nitrate measured in coarse particles with a reasonable enhancement factor relative to fine particles due to favorable aerosol conditions, the missing daytime sources of HONO could be fully compensated by coarse particles serving as the largest source at this coastal site. Our study revealed great potential of coarse particles as a strong daytime HONO source, which has been ignored before but can efficiently promote NOx recycling and thus significantly enhance atmospheric oxidation capacity. © 2023, The Authors. All rights reserved.

关键词： Photolysis

来源：评论

学校读者我要写书评

暂无评论

Uncovering the Risk Spillover of Agricultural Water Scarcity by Simultaneously Considering Water Quality and Quantity

SSRN

引用

SSRN 2023年

作者： Li, Hui Chen, Qionghong Liu, Gengyuan Lombardi, Ginevra Virginia Su, Meirong Yang, Zhifeng State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal University Zhuhai Campus Zhuhai519087 China Department of Economies and Management University of Firenze Via delle Pandette 9 Firenze50127 Italy Research Center for Eco-environmental Engineering Dongguan University of Technology Dongguan523808 China State Key Laboratory of Water Environmental Simulation China

Not only insufficient water quantity, but also inadequate water quality can pose constraints on agricultural production and result in potential economic losses. Such economic losses in agriculture may adversely impact downstream producers through reduced input supplies. In this study, we developed an index assessing potential economic losses in agriculture under both quantity- and quality-induced water scarcity, termed integrated Agricultural Water Scarcity Risk (AWSR). Combining integrated AWSR with a multi-regional input-output model, we estimated the spillovers of integrated AWSR along supply chains. Our results showed that the intersectoral transmission of virtual integrated AWSR (sectoral spillovers in terms of integrated AWSR) were 5 times the virtual quantity-based AWSR. pollution significantly intensifies the indirect supply-chain repercussions of agricultural water scarcity. Moreover, we identified some primary virtual integrated AWSR exporters (e.g., Jiangsu-vegetables and Shandong-swine, of which the integrated AWSR had considerable spillover effects on downstream sectors) and importers (e.g., Henan-chemical industry and Henan-textiles, which were vulnerable to upstream integrated AWSR), that could not be detected in quantity-based AWSR results. This study underscores the importance of water quality in the assessments of AWSR. Strategies to mitigate the spillovers of AWSR might be inefficient without the consideration of water quality. © 2023, The Authors. All rights reserved.

关键词： Water quality

来源：评论

学校读者我要写书评

暂无评论

Molecular Tracers, Mass Spectral Tracers and Oxidation of Organic Aerosols Emitted from Cooking and Fossil Fuel Burning Sources

SSRN

引用

SSRN 2022年

作者： Liang, Chengrui Wang, Shuxiao Hu, Ruolan Huang, Guanghan Xie, Jinzi Zhao, Bin Li, Yuyang Zhu, Wenfei Guo, Song Jiang, Jingkun Hao, Jiming State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China College of Environmental Sciences and Engineering Peking University Beijing100871 China

Secondary organic aerosol (SOA) composes a substantial fraction of atmospheric particles, yet the formation and aging mechanism of SOA remains unclear. Here we investigate the initial oxidation of primary organic aerosol (POA) and further aging of SOA in winter Beijing by using aerosol mass spectrometer (AMS) measurements along with offline molecular tracer analysis. ME-2 source apportionment was conducted to capture the characteristic of source-related SOA, and connect them with specific POA. Our results show that urban cooking and fossil fuel burning sources contribute significantly (17% and 20%) to total organic aerosol (OA) in winter Beijing. Molecular tracer analysis by GC×GC reveals that cooking SOA (CSOA) is produced through both photooxidation and aqueous-phase processing, while less oxidized SOA (LO-SOA) is the photooxidation product of fossil fuel burning OA (FFOA) and may experience aqueous-phase aging to form more-oxidized oxygenated OA (MO-OOA). Furthermore, C 3 HO 2 + and C 4 H 5 O 2 + are mass spectral tracers indicating the initial photooxidation, while CH 2 O + and C 2 H 2 O 2 + imply further aqueous-phase aging of OA. Tracer analysis indicates that the formation of diketones dominates the initial photooxidation of POA, while the formation of glyoxal and diacids dominates the further aqueous-phase aging of SOA. © 2022, The Authors. All rights reserved.

关键词： Photooxidation

来源：评论

学校读者我要写书评

暂无评论

Impact of Commercial Cooking on Urban PM2.5 and O3 with Realtime Data-Assisted Emission Inventory

SSRN

引用

SSRN 2022年

作者： Yuan, Yingzhi Zhu, Yun Lin, Che-Jen Wang, Shuxiao Xie, Yanghong Li, Haixian Xing, Jia Zhao, Bin Zhang, Mengmeng You, Zhiqiang Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and Energy South China University of Technology Guangzhou Higher Education Mega Center Guangzhou510006 China Department of Civil and Environmental Engineering Lamar University BeaumontTX77710 United States State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China Shunde Branch of Foshan Ecological Environment Bureau Foshan528000 China

Commercial cooking (CC) is an intensive near-field source contributing to ambient PM2.5 and O3 concentration in urban areas. Compilation of CC emission inventories (EI) has been challenging due to the dynamic variation of the emission sector, which has resulted in lack of data, underestimated quantity and poor temporal-spatial resolution. A pilot study was carried out to develop a methodology that integrates existing emission statistics with online oil fumes monitoring (OOFM) data for developing a high temporal-spatial resolution EI of CC. With the updated emission inventory, the impacts of CC emission on local PM2.5 and O3 were evaluated using WRF-CMAQ and model-monitor data fusion tool of SMAT-CE in Shunde, China. The developed methodology gave an emission estimate significantly different from legacy inventory in terms of emission quantity and temporal allocation. Altogether, the OOFM data-assisted EI led to better simulation performance of spatiotemporal variations on model-predicted PM2.5 and O3 concentrations. The simulation results using the newly CC inventory indicated that the emissions in this sector contributed 1.25 ± 2 μg/m3 of PM2.5, and accounted for 24 ± 1 % of PM2.5 concentration derived from local anthropogenic emissions. Moreover, a higher contribution of CC to PM2.5 was predicted in the near field of high-emission areas, while the contribution to O3 was insignificant. © 2022, The Authors. All rights reserved.

关键词： Image resolution

来源：评论

学校读者我要写书评

暂无评论

Enhancing Biological Conversion of No to N2o by Utilizing Thermophiles Instead of Mesophiles

SSRN

引用

SSRN 2023年

作者： Li, Dan Sun, Zhuqiu Luo, Ga Lu, Lichao Zhang, Shaobo Xi, Jinying Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua University Beijing100084 China School of Petrochemical Engineering and Environment Zhejiang Ocean University Zhoushan316004 China Beijing Capital Sludge Disposal Technology Co. LTD Beijing100044 China

Recently, production of nitrous oxide (N2O) from biological denitrification of nitric oxide (NO) in flue gases have been reported and drawn more attention. Although the temperature of flue gas after desulfurization is usually 45-70℃, all previous studies carried out the denitrification of NO under mesophilic conditions. In this study, biological conversion of NO to N2O were performed under both mesophilic and thermophilic conditions (35–50 ℃). The results showed that temperature has a great impact on N2O production and a maximum conversion efficiency from NO to N2O of 82% was achieved at 45 ℃, which is higher than the reported conversion (24-71%). Both reductase (NOR) and nitrous oxide reductase (N2OR) activities were inhibited by increased temperature, while N2OR inhibition was more significant. The Biolog test results showed that microbial communities at 40 and 45 ℃ had greater carbon source metabolising capacities than those at 35 and 50 ℃. High-throughput sequencing showed that species richness and diversity decreased significantly with increased temperature. Additionally, redundancy analysis showed that the genus Enterococcus, Clostridium, Romboutsia, and Streptococcus were closely related to NO denitrification and N2O production. LEfSe analysis showed that Streptococcus was the key distinguished microorganism between the 45 ℃ sample and others. The results in this study demonstrated that biological production of N2O from NO in flue gas could be more efficient and promising under thermophilic condition (45 ℃). © 2023, The Authors. All rights reserved.

关键词： Nitric oxide

来源：评论

学校读者我要写书评

暂无评论

Fine-scale activity patterns of large-and medium-sized mammals in a deciduous broadleaf forest in the Qinling Mountains,China

引用

Journal of Forestry Research 2021年第6期32卷 2709-2717页

作者： Yuke Zhang Xiangbo He Xuehua Liu Melissa Songer Haishan Dang Quanfa Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control and School of Environment Tsinghua UniversityBeijing 100084People’s Republic of China Foping Nature Reserve Foping CountyShaanxi 723400People’s Republic of China Conservation Ecology Center Smithsonian Conservation Biology InstituteFront RoyalVA 22630USA Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden of the Chinese Academy of SciencesWuhan 430074People’s Republic of China

The composition of animal species and interactions among them are widely known to shape ecological communities and fine-scale(e.g.,<1 km)monitoring of animal communities is essential for understanding the relationships among animals and *** the co-existence of large-and medium-sized species has been studied across different scales,research on fine-scale interactions of herbivores in deciduous broadleaf forests is *** trapping of large-and medium-sized mammals was carried out over a 1 year period within a 25 ha deciduous broadleaf forest dynamics plot in the Qinling Mountains,*** species of large-and medium-sized mammals,including six carnivores,six ungulates,one primate and one rodent species were *** density estimations were used to analyse the diel or 24 h activity patterns of all species with more than 40 independent detections and general linear models were developed to explore the spatial relationships among the *** combination of overlapping diel activity patterns and spatial associations showed obvious niche separation among six species:giant panda(Ailuropoda melanoleuca David),takin(Budorcas taxicolor Hodgson),Reeves’s muntjac(Muntiacus reevesi Ogilby),tufted deer(Elaphodus cephalophus Milne-Edwards),Chinese serow(Capricornis milneedwardsii David)and wild boar(Sus scrofa Linnaeus).Long-term fine-scale monitoring is useful for providing information about the co-existence of species and their *** results demonstrate the importance for fine-scale monitoring of animals and plants for improving understanding of species interactions and community dynamics.

关键词： Large-and medium-sized mammals Fine-scale interaction Camera trapping Spatiotemporal patterns Forest dynamics plots Qinling mountains

来源：评论

学校读者我要写书评

暂无评论

Enhanced Removal of Ni-Edta by Three-Dimensional Electro-Fenton Process Using Fe-N-Doped Biochar as Catalytic Particle Electrodes

SSRN

引用

SSRN 2023年

作者： Zhao, Zilong Ren, Yatao Qi, Shuyu Ning, Zigong Wang, Xing Dong, Wenyi Wang, Hongjie School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Shenzhen518055 China CAS Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and Engineering University of Science and Technology of China Hefei230026 China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Xili University Town Nanshan District Shenzhen518055 China

Heavy metal complexes are refractory to be removed due to their stable and intricate structure. In this work, Fe and N co-doped biochar derived from rice husk (Fe-N-RHBC) was exploited as catalytic particle electrodes in a three-dimensional electro-Fenton (3D-EF) system for the decomplexation and removal of Ni-EDTA model pollutant. The characterization analysis and catalytic activity comparison verified the enhancement effects of Fe and N co-doping on the types of active sites, interfacial electron transfer property, and H2O2 decomposition capacity. Compared with other oxidation systems studied, rapid removal of Ni-EDTA could be achieved by 3D-EF within the initial 1 minutes, with the maximum H2O2 utilization up to 99.1% after 30 min. After three consecutive cycles, the as-prepared catalytic particle electrodes still retained high stability and catalytic capacity. During the reaction, anode oxidation, particle electrode polarization, catalysis and adsorption of Fe-N-RHBC as well as cathodic electro-deposition worked together to contribute to the treatment of Ni-EDTA, and the surface-bound O2•− radicals and 1O2 induced by Fe-N-RHBC catalytic particle electrode were the primary responsibility for decomplexation and removal of Ni-EDTA. On this basis, the possible mechanisms of Ni-EDTA removal in the 3D-EF by Fe-N-RHBC catalytic particle electrode were further proposed. © 2023, The Authors. All rights reserved.

关键词： Catalyst activity

来源：评论

学校读者我要写书评

暂无评论

Application of manganese oxide-based materials for arsenic removal: A review

引用

Science of the Total environment 2024年 918卷 170269页

作者： Younas, Muhammad Bacha, Aziz Ur Rahim Khan, Kaleem Nabi, Iqra Ullah, Zahid Humayun, Muhammad Hou, Jingtao State Environmental Protection Key Laboratory of Soil Health and Green Remediation College of Resources and Environment Huazhong Agricultural University Wuhan430070 China Hubei Key Laboratory of Soil Environmental and Pollution Remediation College of Resources and Environment Huazhong Agricultural University Wuhan430070 China State Key Laboratory of Urban Water Resource and Environment Shenzhen Key Laboratory of Organic Pollution Prevention and Control School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Shenzhen518055 China Institute of Environmental and Occupational Health Sciences School of Medicine National Yang Ming Chiao Tung University Taiwan Taipei112 China State Key Laboratory of Biogeology and Environmental Geology School of Environmental Studies China University of Geosciences Wuhan430074 China Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China

In the context of growing arsenic (As) contamination in the world, there is an urgent need for an effective treatment approach to remove As from the environment. Industrial wastewater is one of the primary sources of As contamination, which poses significant risks to both microorganisms and human health, as the presence of As can disrupt the vital processes and synthesis of crucial macromolecules in living organisms. The global apprehension regarding As presence in aquatic environments persists as a key environmental issue. This review summarizes the recent advances and progress in the design, strategy, and synthesis method of various manganese-based adsorbent materials for As removal. Occurrence, removal, oxidation mechanism of As(III), As adsorption on manganese oxide (MnOx)-based materials, and influence of co-existing solutes are also discussed. Furthermore, the existing knowledge gaps of MnOx-based adsorbent materials and future research directions are proposed. This review provides a reference for the application of MnOx-based adsorbent materials to As removal. © 2024 Elsevier B.V.

关键词： Manganese oxide

来源：评论

学校读者我要写书评

暂无评论

Effects of dissolved organic matter on mercury speciation in rice rhizosphere amended with sulfur-rich biochar

Soil and Environmental Health

引用

Soil and environmental Health 2023年第2期1卷

作者： Hu, Hualing Gao, Yiman Tan, Wenbing Xi, Beidou Technical Centre for Soil Agriculture and Rural Ecology and Environment Ministry of Ecology and Environment Beijing 100012 China State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing 100012 China

Natural sulfur (S)-rich biochar (NRB) can be employed as an alternative for traditional S-modified biochar. However, the effect of dissolved organic matter (DOM) on mercury (Hg) speciation in rice rhizosphere soils under natural S-rich biochar application remains unclear. We conducted a pot experiment to study the effects of NRB application on the chemical composition and structure of DOM and the related speciation and availability of Hg in rice rhizosphere. Applying NRB significantly increased the concentration of methylmercury (MeHg) in the rhizosphere soils, which was enhanced with application frequency. This observation can be explained by MeHg immobilization in response to increasing S content in rice rhizosphere soils. We also observed increased molecular weight and functional group complexity of DOM, likely contributing to the decrease in MeHg mobility. Furthermore, the increase in pH and humification of DOM caused by S-rich biochar application generally reduced the concentrations of water-soluble and mercuric-sulfide fraction (easily-available Hg species) and organo-chelated fraction (potentially-available Hg species). Our findings highlight that the application of NRB can reduce the availability of MeHg in rice rhizosphere, thus providing a practical basis for reducing the potential risk of MeHg toxicity. © 2023 The Author(s)

关键词： Availability Chemical structure Dissolved organic matter Methylmercury Rice rhizosphere soils Sulfur-rich biochar

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：