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High potential in synergizing the reduction of dissolved organic carbon concentration and carbon dioxide emissions for submerged-vegetationcovered river networks

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Journal of environmental sciences 2025年第5期151卷 298-309页

作者： Qingqian Li Ruixia Liu Zhangmu Jing Yanjie Wei Shengqiang Tu Huibin Yu Hongjie Gao Peng Yuan state key laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental ScienceBeijing 100012China state environmental Protection key laboratory of Estuarine and Coastal Environment Chinese Research Academy of Environmental ScienceBeijing 100012China state key laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China College of Municipal and environmental Engineering Shenyang Jianzhu UniversityShenyang 110168China

Various technologies and projects have been explored and developed for the synergetic control of environmental pollution and carbon emissions in aquatic *** submerged vegetation in shallow waters was also expected to achieve this ***,the magnitude and mechanism of carbon dioxide(CO_(2))emission affected by submerged vegetation is not clear enough in complex aquatic *** study investigated the influences of submerged plants on CO_(2)emission,ecosystem metabolism features,and microbial community traits based on observations in river networks on the Changjiang River *** results showed that CO_(2)emission from planted waters accounted for 73%of unplanted ***,planted waters had higher dissolved organic carbon removal capacity in overlying water and higher potential of carbon sequestration in sediment at the same *** distinctions between the two habitats were attributed to(1)improved CO_(2)and bicarbonate consumption in water columns via enhancing photosynthesis and(2)inhibited CO_(2)production by reconstructing the benthic microbial *** eco-advantages were found in planted sediments,such as a high potential of methane oxidation and xenobiotics biodegradation and a low risk of becoming black and *** brief,submerged vegetation is beneficial in promoting pollution removal and carbon retention *** study advances our understanding of the feedback between aquatic metabolism and CO_(2)emission.

关键词： Mitigated CO_(2)emission Submerged vegetation Paired O_(2)-CO_(2)departure Carbon uptake velocity Microbial metabolism pathways The Changjiang River

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Nitrogen addition promotes soil carbon accumulation globally

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science China(Life sciences) 2025年第1期68卷 284-293页

作者： Xuemei Yang Suhui Ma Erhan Huang Danhua Zhang Guoping Chen Jiangling Zhu Chengjun Ji Biao Zhu Lingli Liu Jingyun Fang Institute of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China Ministry of Education key laboratory for Transboundary Ecosecurity of Southwest China School of Ecology and Environmental ScienceYunnan UniversityKunming 650500China state key laboratory of vegetation and environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China

Soil is the largest carbon(C)reservoir in terrestrial ecosystems and plays a crucial role in regulating the global C cycle and climate *** nitrogen(N)deposition has been widely considered as a critical factor affecting soil organic carbon(SOC)storage,but its effect on SOC components with different stability remains ***,we analyzed extensive empirical data from 304 sites worldwide to investigate how SOC and its components respond to N *** analysis showed that N addition led to a significant increase in bulk SOC(6.7%),with greater increases in croplands(10.6%)and forests(6.0%)compared to grasslands(2.1%).Regarding SOC components,N addition promoted the accumulation of plant-derived C(9.7%–28.5%)over microbial-derived C(0.2%),as well as labile(5.7%)over recalcitrant components(–1.2%),resulting in a shift towards increased accumulation of plant-derived labile ***,N addition led to a greater increase in particulate organic C(11.9%)than mineral-associated organic C(3.6%),suggesting that N addition promotes C accumulation across all pools,with more increase in unstable than stable *** responses of SOC and its components were best predicted by the N addition rate and net primary ***,our findings suggest that N enrichment could promote the accumulation of plant-derived and non-mineral associated C and a subsequent decrease in the overall stability of soil C pool,which underscores the importance of considering the effects of N enrichment on SOC components for a better understanding of C dynamics in soils.

关键词： meta-analysis nitrogen enrichment soil organic carbon carbon accumulation carbon stability

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Molecular characteristics of dissolved organic phosphorus in watershed runoff:Coupled influences of land use and precipitation

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Journal of environmental sciences 2025年第2期148卷 387-398页

作者： Zhanyao Shi Yao Du Hongni Liu Yamin Deng Yiqun Gan Xianjun Xie state environmental Protection key laboratory of Source Apportionment and Control of Aquatic Pollution China University of GeosciencesWuhan 430078China Hubei key laboratory of Yangtze Catchment environmental Aquatic science China University of GeosciencesWuhan 430078China School of environmental Studies&state key laboratory of Biogeology and environmental Geology China University of GeosciencesWuhan 430078China

Land use and precipitation are two major factors affecting phosphorus(P)pollution of watershed ***,molecular characterization of dissolved organic phosphorus(DOP)in runoff under the joint influences of land use and precipitation remains *** study used Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS)to study the molecular characteristics of DOP in a typical P-polluted watershed with spatially variable land use and *** results showed that low precipitation and intense human activity,including phosphate mining and associated industries,resulted in the accumulation of aliphatic DOP compounds in the upper reaches,characterized by low aromaticity and low biological *** precipitation and widespread agriculture in the middle and lower reaches resulted in highly unsaturated DOP compounds with high biological stability constituting a higher proportion,compared to in the upper ***,under similar precipitation,more aliphatic DOP compounds characterized by lower aromaticity and higher saturation were enriched in the lower reaches due to more influence from urban runoff relative to the middle *** and/or microbial processes did result in changes in the characteristics of DOP compounds during runoff processes due to the prevalence of low molecular weight and low O/C bioavailable aliphatic DOP molecules in the upper reaches,which were increasingly transformed into refractory compounds from the upper tomiddle *** results of this study can increase the understanding of the joint impacts of land use and precipitation on DOP compounds in watershed runoff.

关键词： Watershed runoff DOP FT-ICR MS Land use Precipitation

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Release characteristics of arsenic from sediments and its source or sink competition with phosphorus:A case of a great lake with grass-algae alternation

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Journal of environmental sciences 2025年第3期149卷 278-287页

作者： Shuhang Wang Yongsheng Chang Wei Huang Dianhai Yang Feifei Che state key laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China College of environmental science and Engineering Donghua UniversityShanghai 201620China National Engineering laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China

The arsenic(As)release from sediments in great lakes is affected by various *** this study,the characteristics of As release fromsediments was investigated,and the As sources and sinks with the strengths in sediments from different areas(grass-type,algae-type,and grass-algae alternation areas)in great shallow lakes(Taihu Lake,China)were analyzed,and the influence of P competition in the process of As release was also *** results showed that changing trend of the values of equilibrium As concentration in sediments were consistent with the regional changes(0 to 28.12μg/L),and the sediments from algaetype areas had the higher *** sediments from western lake and northwest lake bay were a strong As and a weak P source,and the north lake bay had the opposite trend of these two *** P source competition with As from the sediments occurred in algae-type *** grass-type areas had strong As and P retention capacities,indicating a sink role of sediment with high As and P sorption *** degree of As and P saturation had similar trend in sediments,and the grass-type areas had the higher values,18.3%-21.4%and 15.31%-20.34%,*** analysis results showed that most of As release contribution was from the bottom(30-50 cm)sediments,and the surface(0-10 cm)sediments from algae-type areas contributed more to the overlying water than other region.

关键词： Arsenic Phosphorus Sediment Source and sink Contribution

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Quantum ion coherence in biological ion channels

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science China Materials 2025年

作者： Linfeng Chen Fan Xia state key laboratory of Geomicrobiology and environmental changes Engineering Research Center of Nano-Geomaterials of Ministry of Education Faculty of Materials Science and Chemistry China University of Geosciences(Wuhan)

Throughout the annals of human civilization, the utilization of energy has been a cornerstone of our advancement. Particularly over the past few centuries, each technological revolution has catalyzed a leap in development, profoundly transforming society. However, with these advancements, energy consumption has surged.

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Long-term trends and response of wet ammonia deposition to changes in anthropogenic emissions in the Pearl River delta of China

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Journal of environmental sciences 2025年第5期151卷 373-386页

作者： Mingyue Li Lyumeng Ye Ming Chang Weihua Chen Shuidi He Buqing Zhong Xuemei Wang Guangdong-Hongkong-Macao Joint laboratory of Collaborative Innovation for environmental Quality Institute for Environmental and Climate ResearchJinan UniversityGuangzhou 511443China South China Institute of environmental sciences The Ministry of Ecology and Environment of PRCGuangzhou 510530China key laboratory of vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China

The Pearl River Delta(PRD)region has been identified as a significant hotspot of wet ammonium ***,the absence of long-term monitoring data in the area hinders the comprehension of the historical trends and changes in wet NH_(4)^(+)-N deposition in response to emissions,which interferes with the ability to make effective *** study has analyzed the long-term trends of wet NH_(4)^(+)-N deposition flux and has quantified the effect of anthropogenic emissions and meteorological factors at a typical urban site and a typical forest site in the PRD region from 2009 to *** revealed a significant decreasing trend in wet NH_(4)^(+)-N flux in both the typical urban and forest areas of the PRD region,at-6.2%/year(p<0.001)and-3.3%/year(p<0.001),*** emissions are thought to have contributed 47%–57%of the wet NH_(4)^(+)-N deposition trend over the past 12 years compared to meteorological *** conditions dominated the interannual fluctuations in wet NH_(4)^(+)-N deposition with an absolute contribution of 46%–52%,while anthropogenic emissions change alone explained 10%–31%.NH_(3)emissions have the greatest impact on the urban area among anthropogenic emission factors,while SO_(2)emissions have the greatest impact on the forest ***,precipitation was identified as the primary meteorological driver for both *** findings also imply that the benefits of NH_(3)emissions reductions might not immediately emerge due to interference from weather-related factors.

关键词： Long-term trends Inter-annual variation Wet ammonium deposition Anthropogenic emission change Meteorological condition The Pearl River Delta region

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Obesogenic effects of six classes of emerging contaminants

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Journal of environmental sciences 2025年第5期151卷 252-272页

作者： Siying Wu Chaoyu Tong Jing Liu MOE key laboratory of environmental Remediation and Ecosystem Health College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China

There is growing concern about the concept that exposure to environmental chemicals may be contributing to the obesity ***,there is no consensus on the obesogenic effects of emerging contaminants from a toxicological and environmental *** potential human exposure and experimental evidence for obesogenic effects of emerging contaminants need to be systematically *** main objective of this review is to provide recommendations for further subsequent policy development following a critical analysis of the literature for humans and experimental animals exposed to emerging *** article reviews human exposure to emerging contaminants(with a focus on antimicrobials,preservatives,water and oil repellents,flame retardants,antibiotics and bisphenols)and the impact of emerging contaminants on *** emerging contaminants have been widely detected in human biological *** studies provide evidence linking exposure to emerging contaminants to the risks of obesity in *** based on animalmodels and adipose cells show the obesogenic effects of emerging contaminants and identify modes of action by which contaminants may induce changes in body fat accumulation and lipid metabolic *** knowledge gaps in this area and future directions for further investigation are discussed.

关键词： Emerging contaminants Obesity Human exposure Preservatives Flame retardants Plasticizers Antibiotics

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Tree growth decline to warm-wet conditions in boreal forests is linked to stand density

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Forest Ecosystems 2025年第1期12卷 74-82页

作者： Bingqian Zhao Yihong Zhu Lushuang Gao Qibing Zhang Mingqian Liu Klaus von Gadow Research Center of Forest Management Engineering of state Forestry and Grassland Administration Beijing Forestry UniversityBeijing100083China state Forestry and Grassland Administration key laboratory of Forest Resources&environmental Management Beijing Forestry UniversityBeijing100083China Department of environmental science Policy and ManagementUniversity of CaliforniaBerkeley94704USA state key laboratory of vegetation and environmental Change Institute of BotanyChinese Academy of SciencesBeijing100093China laboratory of Wood Technology Ghent UniversityCoupure links 6539000GhentBelgium Faculty of Forestry and Forest Ecology Georg-August-University GottingenBüsgenweg 5D-37077GottingenGermany Department of Forestry and Wood science Faculty of AgriSciencesStellenbosch UniversityStellenbosch Private Bag X1Stellenbosch7602South Africa

Warm-wet climatic conditions are widely regarded as conducive to remarkable tree growth,alleviating climatic ***,the notable decline in tree growth observed in the southern edge of boreal forests has heightened concerns over the spatial-temporal dynamics of forest ***,attaining a comprehensive grasp of the underlying patterns and their propelling factors remains a formidable *** collected tree ring samples from a network of 50 sites across the Greater Xing'an *** samples were subsequently grouped into two distinct clusters,designated as Groups A and *** percentage change of growth(GC,%)and the proportion of declining sites were utilized to assess forest *** decline in tree growth within Larix gmelinii forests exhibits significant regional variation,accompanied by temporal fluctuations even within a given *** A exhibited a pronounced increase in frequency(59.26%)of occurrences and encountered more severe declines(21.65%)in tree growth subsequent to the 1990s,contrasting sharply with Group B,which observed lower frequencies(20.00%)and relatively less severe declines(21.02%)prior to the *** primary impetus underlying the opposite radial growth increments observed in Larix gmelinii trees from the interplay between their differential response to temperatures and wetter climatic conditions,which is significantly influenced by varying stand *** cold-dry conditions,low-density forests may experience soil water freezing,exacerbating drought conditions and thereby inhibiting tree growth,in Group *** growth in high-density stands is restrained by warm-wet conditions,in Group *** results provide new insights into the variability at the southern edge of the boreal forest biome with different responses to density and climate.

关键词： Growth decline Stand density The southern edge of boreal forests Larix gmelinii

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Climate changes drive phytoplankton community through complementarity and selection effects in a large mesotrophic reservoir

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Journal of Oceanology and Limnology 2025年第1期43卷 119-133页

作者： Yue WU Qi YE Siwen CHEN Lei JIANG Kaining CHEN Shuzhan MA Yiheng CHANG Jie LIU Xiaoli SHI state key laboratory of Lake science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of sciences Beijing 100049China College of Nanjing University of Chinese Academy of SciencesNanjing 211135China China state environmental Protection key laboratory of Aquatic Ecosystem Health in the Middle and Lower Reaches of Yangtze River Jiangsu Provincial Academy of Environmental ScienceNanjing 210036China School of Geography and Ocean science Nanjing UniversityNanjing 210023China

Understanding the response of the phytoplankton community to climate change is essential for reservoir *** analyzed a long-term data series(2009–2020)on the phytoplankton community in a large mesotrophic reservoir in the wet season to investigate the impacts of temperature and precipitation increases caused by climate change on the functioning and trait composition of the phytoplankton *** the last twelve years,the 3-month accumulative precipitation increased from 291.03 mm to 590.91 mm,and the surface water temperature increased from 25.06℃to 26.49℃in wet season,*** changes caused a higher water level,stronger thermal stratification and lower nitrogen concentration in Daxi *** dynamic equilibrium model indicated that the increased precipitation and water temperature-related environmental changes would result in a more diverse and productive phytoplankton *** effects of increasing water temperature and precipitation on the niche complementarity and selection effects within the phytoplankton community were analyzed using structural equation model by means of the functional divergence index and functional evenness index,respectively,elucidating the reasons for the increase in cyanobacteria in the absence of a significant increase in nutrient *** on these results,it is advisable that more stringent phosphorus control standards might be conducted to reduce the risks of cyanobacteria proliferation in the context of global warming.

关键词： global warming climate change reservoir trait-based phytoplankton functional group cyanobacteria

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Phase changes and electromagnetic wave absorption performance of XZnC(X=Fe/Co/Cu)loaded on melamine sponge hollow carbon composites

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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 566-577页

作者： Xiubo Xie Ruilin Liu Chen Chen Di Lan Zhelin Chen Wei Du Guanglei Wu School of environmental and Material Engineering Yantai UniversityYantai 264005China School of Materials science and Engineering Hubei University of Automotive TechnologyShiyan 442002China Shandong key laboratory of Eco-environmental science for the Yellow River Delta Shandong University of AeronauticsBinzhou 256603China Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China

Non-stoichiometric carbides have been proven to be effective electromagnetic wave(EMW)absorbing *** this study,phase and morphology of XZnC(X=Fe/Co/Cu)loaded on a three dimensional(3D)network structure melamine sponge(MS)carbon composites were investigated through vacuum filtration followed by *** FeZnC/CoZnC/CuZnC with carbon nanotubes(CNTs)were uniformly dispersed on the surface of melamine sponge carbon skeleton and Co-containing sample exhibits the highest CNTs *** minimum reflection loss(RL_(min))of the CoZnC/MS composite(m_(composite):m_(paraffin)=1:1,m represents mass)reached-33.60 dB,and the effective absorption bandwidth(EAB)reached 9.60 *** outstanding electromagnetic wave absorption(EMWA)properties of the CoZnC/MS composite can be attributed to its unique hollow structure,which leads to multiple reflections and *** formed conductive network improves dielectric and conductive *** incorporation of Co enhances the magnetic loss capability and optimizes interfacial polarization and dipole *** simultaneously improving dielectric and magnetic losses,ex-cellent impedance matching performance is *** clarification of element replacement in XZnC/MS composites provides an effi-cient design perspective for high-performance non-stoichiometric carbide EMW absorbers.

关键词： electromagnetic wave absorption three dimensional network structure melamine sponge derived carbon non-stoichiometric carbide

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