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Effects of biological soil crusts on plant growth and nutrient dynamics in the Minqin oasis-desert ecotone,Northwest China

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Journal of Arid Land 2025年第1期17卷 130-143页

作者： KANG Jianjun YANG Fan ZHANG Dongmei DING Liang Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Linze Inland River Basin Research StationChinese Ecosystem Research NetworkNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Minqin National Studies station for Desert Steppe Ecosystem Gansu Desert Control Research InstituteLanzhou 730070China Zhangye Agricultural and Rural Bureau Zhangye 734000China

Biological soil crusts(BSCs)play crucial roles in improving soil fertility and promoting plants settlement and reproduction in arid ***,the specific effects of BSCs on growth status and nutrient accumulation of plants are still unclear in different arid *** study analyzed the effects of three different BSCs treatments(without crust(WC),intact crust(IC),and broken crust(BC))on the growth,inorganic nutrient absorption,and organic solute synthesis of three typical desert plants(Grubovia dasyphylla(Fisch.&***.)Freitag&***,Nitraria tangutorum Bobrov,and Caragana koraiensis Kom.)in the Minqin desert-oasis ecotone of Northwest *** showed that the effects of three BSCs treatments on seed emergence and survival of three plants varied with seed *** IC treatment significantly hindered the emergence and survival of seeds,while the BC treatment was more conducive to seed emergence and survival of *** significantly promoted the growth of three plants,but their effects on plant growth varied at different stages of the ***,the growth of *** was affected by BSCs in early stage,but the effects on the growth of *** significantly weakened in the middle and late ***,the growth of *** and *** only showed differences at the middle and late stages,with a significant enhancement in *** of variance showed that BSCs,plant species,growth period,and their interactions had significant effects on the biomass and root:shoot ratio of three *** significantly affected the nutrients absorption and organic solute synthesis in ***,BSCs significantly promoted nitrogen(N)absorption in plants and increased plant adaptability in N poor desert ecosystems,but had no significant effects on phosphorus(P)*** effects of BSCs on inorganic nutrient absorption and organic solute synthesis in plants varied significantly among different plant *** results su

关键词： biological soil crusts(BSCs) desert oasis desert plants growth nutrient accumulation

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Creeping reservoir landslide progressive evolution process: from large-scale direct shear creep test to seepage-mechanical-deformation block model

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Journal of Earth Science 2025年

作者： Jiefei Zhang Shu Zhang Huiming Tang Qingbing Liu Qiang Li Huan Zhang Faculty of Engineering， China University of Geosciences Badong National Observation and research station of Geohazards， China University of Geosciences

Creeping reservoir landslides experience slow， ongoing deformation driven by cyclical hydrological conditions， posing a significant threat to hydropower infrastructure and nearby communities. Long-term high consolidation pressure leads to the formation of a dense soil matrix unique structure in slip zone soils， significantly affecting the reservoir landslides evolution. However， current studies often fail to adequately describe and incorporate the structural and creep properties of intact slip zone soils， results in a lack of precision and efficiency when simulating the progressive evolution process of creeping reservoir landslides. This study conducted a series of large-scale direct shear creep test in the intact slip zone soil from No.1 Linjiang landslide of Huangtupo landslide in Three Gorges Reservoir area (TGRA)， to study the creep behavior and long-term strength. Subsequently， a seepage-mechanical-deformation (SMD) block model， offering higher computational efficiency and the ability to dynamically adapt to real-time hydrological boundary conditions， was developed to provide an ovel framework for simulating the progressive evolution of the No.1 Linjiang landslide. The experimental results indicate that that the intact slip zone soil exhibits distinct creep behavior characteristics and has obtained long-term strength. The performance of the proposed SMD block model is further validated by its close alignment with monitoring data， with root-mean-square errors (RMSE) of 2.556 mm and 1.167 mm for the rear and front monitoring points of the landslide， respectively， over one hydrological year. Furthermore， the simulation results highlight that the primary deformations occur at the front and rear of the landslide， with the middle section acting as an anti-sliding barrier. Overall， this study advances the understanding of creeping landslide evolution processes and enhances the simulation capabilities of landslide deformation， offering valuable insights for risk assess

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Emission characteristics of biogenic volatile organic compounds in a subtropical pristine forest of southern China

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Journal of Environmental Sciences 2025年第2期148卷 665-682页

作者： Xi Chen Daocheng Gong Youjing Lin Qiao Xu Yujin Wang Shiwei Liu Qinqin Li Fangyuan Ma Jiangyong Li Shuo Deng Hao Wang Boguang Wang Institute for Environmental and Climate research Jinan UniversityGuangzhou 511443China Guangdong Provincial Observation and research station for Atmospheric Environment and Carbon Neutrality in Nanling Forests China Australia-China Centre for Air Quality Science and Management(Guangdong) Guangzhou 511443China Hainan Provincial Ecological and Environmental Monitoring Center Haikou 571126China

Emission characteristics of biogenic volatile organic compounds(BVOCs)from dominant tree species in the subtropical pristine forests of China are extremely *** we conducted in situ field measurements of BVOCs emissions from representative mature evergreen trees by using dynamic branch enclosures at four altitude gradients(600-1690ma.s.l.)in the Nanling Mountains of southern *** characteristics as well as seasonal and altitudinal variations were *** emission rates and canopyscale emission factors were then *** showed that BVOCs emission intensities in the wet season were generally higher than those in the dry *** were the dominant BVOCs emitted from most broad-leaved trees,accounting for over 70%of the *** superba,Yushania basihirsuta and Altingia chinensis had relatively high emission intensities and secondary pollutant formation *** localized emission factors of isoprene were comparable to the defaults in the Model of Emissions of Gases and Aerosols fromNature(MEGAN),while emission factors of monoterpenes and sesquiterpenes were 2 to 58 times of those in the *** results can be used to update the current BVOCs emission inventory in MEGAN,thereby reducing the uncertainties of BVOCs emission estimations in forested regions of southern China.

关键词： Biogenic volatile organic compounds(BVOCs) Dynamic enclosure system Nanling Mountains Emission factors Emission rates Chemical reactivity

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Landslide model tests with a miniature 2D principal stress sensor

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Journal of Rock Mechanics and Geotechnical Engineering 2025年第1期17卷 94-105页

作者： Kun Fang Yulei Fu Huiming Tang Tangzhe Gao Pengju An Qiong Wu Faculty of Engineering China University of GeosciencesWuhan430074China Badong National Observation and research station of Geohazards China University of GeosciencesWuhan430074China Institute of Rock Mechanics Ningbo UniversityNingbo315211China

Understanding the stress distribution derived from monitoring the principal stress(PS)in slopes is of great *** this study,a miniature sensor for quantifying the two-dimensional(2D)PS in landslide model tests is *** fundamental principle and design of the sensor are *** sensor comprises three earth pressure gages and one gyroscope,with the utilization of three-dimensional(3D)printing *** difficulties of installation location during model preparation and sensor rotation during testing can be effectively overcome using this *** different arrangements of the sensors are tested in verification ***,the application of the sensor in an excavated-induced slope model is *** results demonstrate that the sensor exhibits commendable performance and achieves a desirable level of accuracy,with a principal stress angle error of±5°in the verification *** stress transformation of the slope model,generated by excavation,is demonstrated in the application test by monitoring the two miniature principal stress(MPS)*** sensor has a significant potential for measuring primary stress in landslide model tests and other geotechnical model experiments.

关键词： Landslide Model test Principal stress(PS) Stress measurement

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Advances in regional-scale crop growth and associated process modeling

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Science China Earth Sciences 2025年第3期68卷 653-668页

作者： Wenfeng LIU Yawei BAI Taisheng DU Mengxue LI Hong YANG Shichao CHEN Chuanbin LIANG Shaozhong KANG State Key Laboratory of Efficient Utilization of Agricultural Water Resources China Agricultural University National Field Scientific Observation and research station on Efficient Water Use of Oasis Agriculture in Wuwei of Gansu Province Center for Agricultural Water research in China China Agricultural University 2w2e Environmental Consulting GmbH

In the context of global change, ensuring national food security and achieving sustainable development of agricultural production systems have become major challenges worldwide. To address these issues, regional-scale crop growth and associated process(CROP-AP) models, with their robust simulation and predictive capabilities, have emerged as important tools for studying a wide range of issues relating to agricultural production at river basin, national, and even global scales. Here, we provide a systematic review of the advances of regional-scale CROP-AP models. First, regional-scale CROP-AP models are categorized based on model characteristics: statistical models, crop growth models, hydrology-crop coupling models, and ecosystem models. The origin, development, principle, structure, and application of each model type are introduced. Then, the main functions of regional-scale CROP-AP models are critically reviewed from five aspects: crop yield prediction, crop water consumption, agricultural non-point source pollution, greenhouse gas emissions, and climate change impact and ***, the future development trends and research priorities of regional-scale CROP-AP models are explored from six key perspectives: model validation and calibration, the ability to simulate the coupling of crop physiology and human activities,enhancing model scalability, multi-model ensembles, data and code sharing, and the integration of artificial intelligence. This review aims to provide comprehensive references and insights for the further development and application of large-scale, high-precision CROP-AP models.

关键词： Regional scale Crop model Biophysical processes Model functions Global change

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DI-YOLOv5:An Improved Dual-Wavelet-Based YOLOv5 for Dense Small Object Detection

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IEEE/CAA Journal of Automatica Sinica 2025年第2期12卷 457-459页

作者： Zi-Xin Li Yu-Long Wang Fei Wang the Shanghai Key Laboratory of Power station Automation Technology Shanghai University the School of Mechatronic Engineering and Automation Shanghai University IEEE the TAIHU Laboratory of Deepsea Technological Science China Ship Scientific Research Center

Dear Editor,This letter focuses on the fact that small objects with few pixels disappear in feature maps with large receptive fields, as the network deepens, in object detection tasks. Therefore, the detection of dens...

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Evaluation of ERA5 reanalysis temperature data over the Qilian Mountains of China

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Journal of Mountain Science 2025年第1期22卷 198-209页

作者： ZHAO Peng HE Zhibin School of Computer Science Huainan Normal UniversityHuainan 232038China Linze Inland River Basin research station Key Laboratory of Inland River Basin ScienceNorthwest Institute of Eco-Environment and ResourceChinese Academy of SciencesLanzhou 730000China

Air temperature is an important indicator to analyze climate change in mountainous ***5 reanalysis air temperature data are important products that were widely used to analyze temperature change in mountainous ***,the reliability of ERA5 reanalysis air temperature over the Qilian Mountains(QLM)is *** this study,we evaluated the reliability of ERA5 monthly averaged reanalysis 2 m air temperature data using the observations at 17 meteorological stations in the QLM from 1979 to *** results showed that:ERA5 reanalysis monthly averaged air temperature data have a good applicability in the QLM in general(R2=0.99).ERA5 reanalysis temperature data overestimated the observed temperature in the QLM in *** mean square error(RMSE)increases with the increasing of elevation range,showing that the reliability of ERA5 reanalysis temperature data is worse in higher elevation than that in lower ***5 reanalysis temperature can capture observational warming rates *** the smallest warming rates of observational temperature and ERA5 reanalysis temperature are found in winter,with the warming rates of 0.393°C/10a and 0.360°C/10a,*** study will provide a reference for the application of ERA5 reanalysis monthly averaged air temperature data at different elevation ranges in the Qilian Mountains.

关键词： ERA5 Reanalysis data Air temperature Qilian Mountains Climate change

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Mesospheric tide comparisons at low latitudes observed by two collocated meteor radars

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Earth and Planetary Physics 2025年第1期9卷 54-68页

作者： Jian Li Wen Yi XiangHui Xue Jie Zeng HaiLun Ye JianYuan Wang JinSong Chen Na Li TingDi Chen Chinese Academy of Sciences(CAS)Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology Anhui Mengcheng Geophysics National Observation and Research StationUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave PropagationQingdao 266107China Yunnan Kunming Electromagnetic Environment National Observation and research station Qujing Kunming 655000China

Accurate knowledge of mesospheric winds and waves is essential for studying the dynamics and climate in the mesosphere and lower thermosphere(MLT)*** this study,we conduct a comparative analysis of the mesosphere tidal results obtained from two adjacent meteor radars at low latitudes in Kunming,China,from November 2013 to December *** two radars operate at different frequencies of 37.5 MHz and 53.1 MHz,***,overall good agreement is observed between the two radars in terms of horizontal winds and tide *** results show that the dominant tidal waves of the zonal and meridional winds are diurnal and semidiurnal ***,we conduct an exhaustive statistical analysis to compare the tidal amplitudes and vertical wavelengths recorded by the dual radar systems,which reveals a high degree of alignment in tidal *** investigation includes variances and covariances of tidal amplitudes,which demonstrate remarkable consistency across measurements from both *** finding highlights clear uniformity in the mesospheric tidal patterns observed at low latitudes by the two neighboring meteor *** of the comparative analysis specifically underscore the significant correlation in vertical wavelength measurements,validating the robustness of radar observations for tidal research.

关键词： mesosphere and lower thermosphere region meteor radar mesospheric winds tides

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Promotion of chronic wound healing by plant-derived active ingredients and research progress and potential of plant polysaccharide hydrogels

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Chinese Herbal Medicines 2025年第1期17卷 70-83页

作者： Ru Yan Yanhong Wang Weinan Li Jialin Sun School of Pharmacy Heilongjiang University of Chinese Medicine Key Laboratory of Basic and Application research of Beiyao Ministry of Education Heilongjiang University of Chinese Medicine Department of Medicine Heilongjiang Minzu College Postdoctoral research station Heilongjiang University of Chinese Medicine

Wound healing is a complex biochemical *** use of herbal medicine in wound healing not only carries forward the wisdom of traditional medicine,with its anti-inflammatory and immune-regulating effects,but also reflects the direction of modern biopharmaceutical technology,such as its potential in developing new biomaterials like *** article first outlines the inherent structural properties of healthy skin,along with the physiological characteristics related to chronic wounds in patients with diabetes and ***,the article delves into the latest advancements in clinical and experimental research on the impact of active constituents in herbal medicine on wound tissue regeneration,summarizing existing studies on the mechanisms of various herbal medicines in the healing of diabetic and burn ***,the paper thoroughly examines the application and mechanisms of plant polysaccharide hydrogels containing active herbal compounds in chronic wound *** primary objective is to provide valuable resources for the clinical application and development of herbal medicine,thereby maximizing its therapeutic *** also represents the continuation of traditional medical wisdom,offering new possibilities for advancements in regenerative medicine and wound care.

关键词： active ingredient herbal medicine hydrogel polysaccharides in traditional herbal medicine wound healing

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Significant spatiotemporal pattern of nitrous oxide emission and its influencing factors from a shallow eutropic lake in Inner Mongolia,China

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Journal of Environmental Sciences 2025年第3期149卷 488-499页

作者： Guohua Li Sheng Zhang Xiaohong Shi Shengnan Zhao Liyang Zhan Xueru Pan Fan Zhang Haifeng Yu Yue Sun Lauri Arvola Jussi Huotari Water Conservancy and Civil Engineering College Inner Mongolia Agricultural UniversityHohhot 010018China Inner Mongolia Water Resource Protection and Utilization Key Laboratory Hohhot 010018China State Gauge and research station of Wetland Ecosystem Wuliangsuhai LakeBayan Nur 014404China Key Laboratory of Global Change and Marine-Atmospheric Chemistry Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China Faculty of Biological and Environmental Sciences Ecosystems and Environment Research ProgrammeLammi Biological StationUniversity of HelsinkiLammi FI-16900Finland Masinotek Oy Ensimmainen Savu 2Vantaa FI-01510Finland

Eutrophic shallow lakes are generally considered as a contributor to the emission of nitrous oxide(N_(2)O),while regional and global estimates have remained *** due to a lack of data and insufficient understanding of the multiple contributing *** study characterized the spatiotemporal variability in N_(2)O concentrations and N_(2)O diffusive fluxes and the contributing factors in LakeWuliangsuhai,a typical shallow eutrophic and seasonally frozen lake in Inner Mongolia with cold and arid *** N_(2)O concentrations of the lake exhibited a range of 4.5 to 101.2 nmol/L,displaying significant spatiotemporal *** lowest and highest concentrations were measured in summer and winter,*** spatial distribution of N_(2)Ofluxwas consistent with that of N_(2)O ***,the hotspots of N_(2)O emissions were detected within close to the main inflow of *** wide spatial and temporal variation in N_(2)O emissions indicate the complexity and its relative importance of factors influencing emissions.N_(2)O emissions in different lake zones and seasons were regulated by diverse *** influencing the spatial and temporal distribution of N_(2)O concentrations and fluxes were identified as WT,WD,DO,Chl-a,SD and ***,the same factor demonstrated opposing effects on N_(2)O emission in various seasons or *** research improves our understanding of N_(2)O emissions in shallow eutrophic lakes in cold and arid areas.

关键词： Nitrous oxide Spatial and temporal variation Controlling factors Shallow lakes

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