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Resource enrichment combined with biomass removal maintains plant diversity and community stability in a long-term grazed grassland

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Journal of Plant Ecology 2020年第5期13卷 611-620页

作者： Feng-Wei Xu Jian-Jun Li Li-Ji Wu Xiao-Ming Lu Wen Xing Di-Ma Chen Biao Zhu Shao-Peng Wang Lin Jiang yong-fei bai State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization College of ForestryJiangxi Agricultural UniversityNanchang 330045China College of Ecology and Environmental Science Inner Mongolia Agricultural UniversityHohhot 010011China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China College of Biological and Pharmaceutical Sciences China Three Gorges UniversityYichang 443002China Department of Ecology College of Urban and Environmental Scienceand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China School of Biology Georgia Institute of TechnologyAtlantaGA 30332USA College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Aims Long-term heavy grazing reduces plant diversity and ecosystem function by intensifying nitrogen(N)and water *** contrast,the absence of biomass removal can cause species loss by elevating light competition and weakening community stability,which is exacerbated by N and water ***,how to maintain species diversity and community stability is still a huge challenge for sustainable management of worldwide *** We conducted a 4-year manipulated experiment in six long-term grazing blocks to explore combination of resource additions and biomass removal(increased water,N and light availability)on species richness and community stability in semiarid grasslands of Inner Mongolia,*** Findings In all blocks treated with the combination of resource additions and biomass removal,primary productivity increased and species richness and community stability were maintained over 4 years of *** both species and plant functional group(PFG)levels,the aboveground biomass of treated plants remained temporally stable in treatments with the combination of N and/or water addition and biomass *** maintenance of species richness was primarily caused by the biomass removal,which could increase the amount of light exposure for grasses under resource *** species asynchrony and stability of PFGs contributed to the high temporal stability observed in these *** results indicate that management practices of combined resource enrichment with biomass removal,such as grazing or mowing,could not only enhance primary productivity but also maintain plant species diversity,species asynchrony and community ***,as overgrazing-induced degradation and resource enrichment-induced biodiversity loss continue to be major problems worldwide,our findings have important implications for adaptive management in semiarid grasslands and beyond.

关键词： biomass removal resource addition species richness community stability plant functional groups(PFGs) species asynchrony

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Seasonality regulates the effects of resource addition on plant diversity and ecosystem functioning in semi-arid grassland

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Journal of Plant Ecology 2021年第6期14卷 1143-1157页

作者： Feng-Wei Xu Jian-Jun Li Ji-Shuai Su Xiao-Ming Lu Yang Wang Li-Ji Wu Chao-Nan Wang Di-Ma Chen yong-fei bai State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Research Institute of Forestry Chinese Academy of ForestryBeijing 100091China Grassland Research Center National Forestry and Grassland AdministrationBeijing 100091China Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization College of ForestryJiangxi Agricultural UniversityNanchang 330045China College of Biological and Pharmaceutical Sciences China Three Gorges UniversityYichang 443002China College of Lifesciences University of Chinese Academy of SciencesBeijing 100049China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Aims Seasonal variations in species richness,aboveground net primary productivity(ANPP)and stability under resource enrichment are frequently *** study explores how the impacts of resource enrichment on species richness,ANPP and stability vary among seasons in semi-arid *** We conducted a 3-year experiment in an Inner Mongolia grassland to determine the effects of resource input(water[W],nitrogen[N])on species richness,community ANPP and stability using seasonal sampling during the growing season(2013–2015).Structural equation modeling(SEM)was used to examine the relative importance of resource input on community stability via mechanistic pathways in each month and the whole growing *** Findings Resource inputs did not affect community ANPP in May and June,while N and/or NW enhanced ANPP in July and *** inputs generally did not affect species richness,asynchrony or community stability in most of the *** responses of perennial bunchgrasses(PB)to N and/or NW treatments contributed to the increased community ANPP in July and *** asynchrony may be the major mechanism contributing to community stability in May and June and the entire growing season,and PB stability is potentially the primary factor controlling community stability in July and August under resource *** results indicate that season and resource availability could interact to regulate species richness,community ANPP and stability in semi-arid *** findings have important implications for management practices in semi-arid grasslands in order to mitigate the impact of land use and global change.

关键词： season resource enrichment species richness aboveground net primary productivity(ANPP) community stability plant functional groups

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High-dose dexamethasone regulates microglial polarization via the GR/JAK1/STAT3 signaling pathway after traumatic brain injury

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Neural Regeneration Research 2025年第9期20卷 2611-2623页

作者： Mengshi Yang Miao bai Yuan Zhuang Shenghua Lu Qianqian Ge Hao Li Yu Deng Hongbin Wu Xiaojian Xu fei Niu Xinlong Dong Bin Zhang baiyun Liu Beijing Tiantan Hospital Capital Medical UniversityBeijingChina Department of Neurology The First Hospital of Tsinghua UniversityBeijingChina Department of Neurotrauma and Beijing Key Laboratory of Central Nervous System Injury Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Department of Critical Care Medicine Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Center for Nerve Injury and Repair Beijing Institute of Brain DisordersChina National Clinical Research Center for Neurological DiseasesBeijingChina

Although microglial polarization and neuroinflammation are crucial cellular responses after traumatic brain injury,the fundamental regulatory and functional mechanisms remain insufficiently *** potent anti-inflammato ry agents,the use of glucoco rticoids in traumatic brain injury is still controversial,and their regulatory effects on microglial polarization are not yet *** the present study,we sought to determine whether exacerbation of traumatic brain injury caused by high-dose dexamethasone is related to its regulatory effects on microglial polarization and its mechanisms of *** vitro cultured BV2 cells and primary microglia and a controlled cortical impact mouse model were used to investigate the effects of dexamethasone on microglial ***,dexamethasone,RU486(a glucocorticoid receptor antagonist),and ruxolitinib(a Janus kinase 1 antagonist)were ***-sequencing data obtained from a C57BL/6 mouse model of traumatic brain injury were used to identify potential targets of *** Morris water maze,quantitative reverse transcription-polymerase chain reaction,western blotting,immunofluorescence and confocal microscopy analysis,and TUNEL,Nissl,and Golgi staining were performed to investigate our ***-throughput sequencing results showed that arginase 1,a marker of M2 microglia,was significantly downregulated in the dexamethasone group compared with the traumatic brain injury group at3 days post-traumatic brain *** dexamethasone inhibited M1 and M2 microglia,with a more pronounced inhibitory effect on M2microglia in vitro and in *** receptor plays an indispensable role in microglial polarization after dexamethasone treatment following traumatic brain ***,glucocorticoid receptor activation increased the number of apoptotic cells and neuronal death,and also decreased the density of dendritic spines.A possible downstream receptor signaling mechanism is th

关键词： apoptosis BV2 microglia dexamethasone glucocorticoid receptor glucocorticoids innate immune system microglial polarization neuroinflammation primary microglia traumatic brain injury

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Crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/CuIn(Ga)Se_(2)Tandem Solar Cells

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Nano-Micro Letters 2025年第1期17卷 205-215页

作者： Cong Geng Kuanxiang Zhang Changhua Wang Chung Hsien Wu Jiwen Jiang fei Long Liyuan Han Qifeng Han Yi‑Bing Cheng yong Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials Co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/CuIn(Ga)Se_(2)(CIGS)tandem solar cells(TSCs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and C60 interface and thus reducing *** a result,a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/CIGS TSCs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

关键词： PVK/CIGS TSCs Irregular rough surfaces Modulating the growth PVK/C60 interface recombination

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Research progress of lncRNA and miRNA in hepatic ischemia-reperfusion injury

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Hepatobiliary & Pancreatic Diseases International 2023年第1期22卷 45-53页

作者： Shan-fei Zhu Wei Yuan yong-Liang Du bai-Lin Wang Department of Hepatobiliary Surgery Guangzhou Red Cross Hospital of Jinan UniversityGuangzhou 510220China

Background:Hepatic ischemia-reperfusion injury(HIRI)is a common complication of liver surgeries,such as hepatectomy and liver *** recent years,several non-coding RNAs(nc RNAs)including long non-coding RNAs(lnc RNAs)and micro RNAs(mi RNAs)have been identified as factors involved in the pathological progression of *** this review,we summarized the latest research on lnc RNAs,mi RNAs and the lnc RNA-mi RNA regulatory networks in *** sources:The Pub Med and Web of Science databases were searched for articles published up to December 2021 using the following keywords:“hepatic ischemia-reperfusion injury”,“lnc RNA”,“long noncoding RNA”,“mi RNA”and“micro RNA”.The bibliography of the selected articles was manually screened to identify additional ***:The mechanism of HIRI is complex,and involves multiple lnc RNAs and mi *** roles of lnc RNAs such as AK139328,CCAT1,MALAT1,TUG1 and NEAT1 have been established in *** addition,numerous mi RNAs are associated with apoptosis,autophagy,oxidative stress and cellular inflammation that accompany HIRI *** on the literature,we conclude that four lnc RNA-mi RNA regulatory networks mediate the pathological progression of ***,the expression levels of some lnc RNAs and mi RNAs undergo significant changes during the progression of HIRI,and thus are potential prognostic markers and therapeutic ***:Complex lnc RNA-mi RNA-m RNA networks regulate HIRI progression through mutual activation and *** is necessary to screen for more HIRI-associated lnc RNAs and mi RNAs in order to identify novel therapeutic targets.

关键词： ncRNA lncRNA miRNA Hepatic ischemia-reperfusion injury Research progress

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Distributed Collaborative Response Surface Method for Mechanical Dynamic Assembly Reliability Design

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Chinese Journal of Mechanical Engineering 2013年第6期26卷 1160-1168页

作者： bai Guangchen fei Chengwei School of Energy and Power Engineering Beihang University

Because of the randomness of many impact factors influencing the dynamic assembly relationship of complex machinery, the reliability analysis of dynamic assembly relationship needs to be accomplished considering the randomness from a probabilistic perspective. To improve the accuracy and efficiency of dynamic assembly relationship reliability analysis, the mechanical dynamic assembly reliability（MDAR） theory and a distributed collaborative response surface method（DCRSM） are proposed. The mathematic model of DCRSM is established based on the quadratic response surface function, and verified by the assembly relationship reliability analysis of aeroengine high pressure turbine（HPT） blade-tip radial running clearance（BTRRC）. Through the comparison of the DCRSM, traditional response surface method（RSM） and Monte Carlo Method（MCM）, the results show that the DCRSM is not able to accomplish the computational task which is impossible for the other methods when the number of simulation is more than 100 000 times, but also the computational precision for the DCRSM is basically consistent with the MCM and improved by 0.40-4.63% to the RSM, furthermore, the computational efficiency of DCRSM is up to about 188 times of the MCM and 55 times of the RSM under 10000 times simulations. The DCRSM is demonstrated to be a feasible and effective approach for markedly improving the computational efficiency and accuracy of MDAR analysis. Thus, the proposed research provides the promising theory and method for the MDAR design and optimization, and opens a novel research direction of probabilistic analysis for developing the high-performance and high-reliability of aeroengine.

关键词： machinery dynamic assembly reliability analysis distributed collaborative response surface method,blade-tip radial running clearance

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Variation in Floral Sex Allocation and Reproductive Success in Sequentially Flowering Inflorescence of Corydalis remota var. lineariloba(Fumariaceae)

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Journal of Integrative Plant Biology 2009年第3期51卷 299-307页

作者： Yan-fei Zeng Wei-Ning bai Yu Zhou Da-yong Zhang Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering College of Life Sciences Beijing Normal University Beijing 100875 China State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

In hermaphroditic plants, female reproductive success often varies among different positions within an inflorescence. However, few studies have evaluated the relative importance of underlying causes such as pollen limitation, resource limitation or architectural effect, and few have compared male allocation. During a 2-year investigation, we found that female reproductive success of an acropetally flowering species, Corydalis remota Fisch. ex Maxim. var. lineariloba Maxim. was significantly lower in the upper late developing flowers when compared with the lower early flowers. Supplementation with outcross pollen did not improve female reproductive success of the upper flowers, while removal of the lower developing fruits significantly increased female reproductive success of the upper flowers in both years, evidencing resource limitation of the upper flowers. Female production in upper flowers was greatly improved by simultaneous pollen supplementation of the upper flowers and removal of the lower fruits, suggesting that, when resources are abundant, pollen may limit the female reproductive success of the upper flowers. The less seed mass in the upper flowers didn＇t increase in all treatments due to architecture. In the upper flowers, ovule production was significantly lower and the pollen ： ovule ratio was significantly higher. These results suggest that male-biased sex allocation in the upper flowers may lead to increased male reproductive success, whereas the lower flowers have higher female reproductive success.

关键词： architectural effect Corydalis remota var. lineariloba pollen limitation reproductive success resource limitation sequentially flowering sex allocation.

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Deciphering the molecular mechanisms of Simiaowan in the treatment of hyperuricemia: in vivo and in silico approaches

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Traditional Medicine Research 2025年第2期10卷 37-54页

作者： yong-Chang Zeng Jun-Hong Wu Dan-Dan Xu Kang He Chang-Qing Liu Li-fei Song Zheng-Zhi Wu Qian-Qian Jiang Shao-Yu Liang Department of Neurology The First Affiliated Hospital of Shenzhen UniversityShenzhen 518020China Pharmaceutical Department The Affiliated TCM Hospital of Guangzhou Medical UniversityGuangzhou 510000China School of Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang 550025China Guangzhou Zeli Medical Technology Co. Ltd.Guangzhou 510700China

Background:Simiaowan(SMW),a well-known traditional Chinese medicine,has been employed to treat hyperuricemia(HUA)and gout for ***,the bioactive components and underlying mechanisms have not been *** objective of this study was to identify the active components and potential mechanisms of SMW by integrating pharmacological experimentation,serum pharmacochemistry,network pharmacology and molecular ***:HUA rats modelling by high-fat/high-sugar diet and potassium oxonate/adenine oral administration were used to evaluate the pharmacodynamic effects of ***-Q-Exactive-MS/MS was employed to detect the bioactive components present in SMW-containing *** pharmacology and molecular docking were utilized to elucidate the potential targets and underlying ***:SMW effectively ameliorated HUA rats via the inhibition of uric acid(UA)production,promotion of UA excretion,improvement of lipid and glucose metabolic abnormalities,antioxidant,anti-inflammatory and anti-insulin resistance effects.A total of 73 compounds detected in SMW-containing serum were identified as potential active components,with alkaloids,flavonoids,organic acids,and terpenoids emerging as the primary active *** 203 corresponding targets were obtained as SMW anti-HUA/gout targets,which mainly participated in apoptosis,insulin resistance,TNF,PI3K-Akt,HIF-1,NF-κB,MAPK,IL-17 and TLR signaling *** docking indicated that active compounds(***,phellodendrine,quercetin,formononetin,ferulic acid)had superior binding abilities to the key targets(*** carrier family 22 member 12(URAT1),solute carrier family 22 member 6(OAT1),ATP-binding cassette sub-family G member 2(ABCG2),solute carrier family 2,facilitated glucose transporter member 9(GLUT9),xanthine dehydrogenase/oxidase(XDH),transcription factor p65(RELA),toll-like receptor 4(TLR4),prostaglandin G/H synthase 2(PTGS2),caspase-3(CASP3),insulin(INS)).Conclusion:S

关键词： hyperuricemia network pharmacology serum pharmacochemistry Simiaowan UPLC-Q-Exactive-MS/MS

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Efficient and Reliable Nanoindentation Simulation by Dislocation Loop Erasing Method

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Acta Mechanica Solida Sinica 2020年第5期33卷 586-599页

作者： fei Shuang Pan Xiao Yilong bai LNM Institute of MechanicsChinese Academy of SciencesBeijing100190China Department of Mechanical and Aerospace Engineering University of FloridaGainesvilleFL32611USA

Nanoindentation is a useful technique to measure material properties at microscopic ***,the intrinsically multiscale nature makes it challenging for large-scale simulations to be carried *** is shown that in molecular statics simulations of nanoindentation,the separated dislocation loops(SDLs)are trapped in simulation box which detrimentally affects the plastic behavior in the plastic zone(PZ);and the long-distance propagation of SDLs consumes much computational cost yet with little contribution to the variation of tip *** tackle the problem,the dislocation loop erasing(DLE)method is proposed in the work to alleviate the influence of artificial boundary conditions on the SDL–PZ interaction and improve simulation *** results indicate that the force–depth curves obtained from simulations with and without DLE are consistent with each other,while the method with DLE yields more reasonable results of microstructural evolution and shows better *** new method provides an alternative approach for large-scale molecular simulation of nanoindentation with reliable results and higher efficiency and also sheds lights on improving existing multiscale methods.

关键词： Nanoindentation Dislocation loops Boundary effects Molecular statics

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Plate tectonics in the twenty-first century

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Science China Earth Sciences 2023年第1期66卷 1-40页

作者： yong-fei ZHENG CAS Key Laboratory of Crust-Mantle Materials and Environments Hefei 230026China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China

Plate tectonics was originally established as a kinematic theory of global tectonics,in which the Earth’s rigid outer layer,the lithosphere,consists of different size plates that move relative to each other along divergent,convergent or transform boundaries overlying the ductile *** comprises three elements:rigid lithosphere plates,ductile asthenosphere,and coupled movement *** operates through the interlinked processes of continental drift,seafloor spreading and lithospheric subduction,resulting in the generation,modification and demise of lithospheres throughout geological *** system of lithospheric plates in horizontal and vertical movements forms the spatiotemporal linkages of matter and energy between the surface and interior of Earth,advancing the kinematic theory with a dynamic *** top-down tectonics through lithospheric subduction plays a key role in the operation of plate tectonics,it is balanced for the conservation of both mass and momentum on the spherical Earth by bottom-up tectonics through asthenospheric upwelling to yield seafloor spreading after continental *** gravity-driven subduction of cool lithosphere proceeds through convergence between two plates on one side,and rollback of the subducting slab makes the vacancy for upwelling of the hotter asthenosphere to form active rifting in backarc *** convergence is coupled with plate divergence between two plates along mid-ocean ridges on the other side,inducing passive rifting for seafloor spreading as a remote ***,plate tectonics is recognizable in rock records produced by tectonic processes along divergent and convergent plate *** the asthenospheric upwelling along fossil suture zones may result in continental breakup,seafloor spreading is only induced by gravitational pull of the subducting oceanic slab on the remote ***,the onset and operation of plate tectonics are associated with a series of plate divergent-con

关键词： Continental breakup Seafloor spreading Oceanic subduction Continental collision Lithospheric thinning Asthenospheric upwelling

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