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| 1 | Crustal structure of northeastern margin of the Tibetan Plateau by receiver function inversion显示文摘Using seismic data of about one year recorded by 18 broadband stations of ASCENT project,we obtained 2547 receiver functions in the northeastern Tibetan Plateau.The Moho depths under 14 stations were calculated by applying the H-κ domain search algorithm.The Moho depths under the stations with lower signal-noise ratio(SNR) were estimated by the time delay of the PS conversion.Results show that the Moho depth varies in a range of ~40–60 km.The Moho near the Haiyuan fault is vague,and its depth is larger than those on its two sides.In the Qinling-Qilian Block,the Moho becomes shallower gradually from west to east.To the east of 105°E,the average depth of the Moho is 45 km,whereas the west is 50 km or even deeper.Combining our results with surface wave research,we suggest a boundary between the Qinling and the Qilian Mountains at around 105°E.S wave velocities beneath 15 stations have been obtained through a linear inversion by using Crust2.0 as an initial model,and the crustal thickness that was derived by H-κ domain search algorithm was also taken into account.The results are very similar to the results of previous active source studies.The resulting figure indicates that low velocity layers developed in the middle and lower crust beneath the transition zone of the Tibet Block and western Qinling,which may be related to regional faults and deep earth dynamics.The velocity of the middle and lower crust increases from the Songpan Block to the northeastern margin of Tibetan Plateau.Based on the velocity of the crust,the distribution of the low velocity zone and the composition of the curst(Poisson's ratio),we infer that the crust thickening results from the crust shortening along the direction of compression. | LIU QiMin ZHAO JunMeng LU Fang LIU HongBing | 2014 | Science China Earth Sciences2014，57，4： | 23 |
| 2 | Disentangling the effects of topography and space on the distributions of dominant species in a subtropical forest显示文摘Topography and space are two important factors determining plant species assemblages in forest communities.Quantification of the contribution of these two factors in determining species distribution helps us to evaluate their relative importance in determining species assemblages.This study aims to disentangle the effect of topography and space on the distributions of 14 dominant species in a subtropical mixed forest.Spearman correlation analysis and the torustranslation test were used to test the species–habitat associations.Variation partitioning was used to quantify the relative contributions of topography and space at three sampling scales and three life stages.Correlation analyses and torus-translation tests showed species abundance was mostly correlated with topographic wetness index,vertical distance from the channel network and convexity.Variation partitioning showed that pure topography,pure space and spatially structured topography explained about 2.1 %,41.2 % and 13.8 %of the variation in species distributions,respectively.For nine species,total topography fractions peaked in 20 m quadrats.For ten species,the pure space fractions peaked in 50 m quadrats.For many species,the total topography fraction andthe pure space fraction were larger for the most abundant life stages,which reflected the importance of sampling effect.However,some cases did not follow this trend suggesting that the effects of ecological processes such as habitat filtering,density dependence or dispersal limitation may exceed the sampling effects.In conclusion,we found that spatially structured topography and pure space primarily shaped the distribution of dominant tree species.Furthermore,their effects were both scale- and life stage-dependent. | Qinggang Wang Yaozhan Xu Zhijun Lu Dachuan Bao Yili Guo Junmeng Lu Kuihan Zhang Haibo Liu Hongjie Meng Xiujuan Qiao Handong Huang Mingxi Jiang | 2014 | Chinese Science Bulletin2014，59，35： | 16 |
| 3 | Density dependence and habitat preference shape seedling survival in a subtropical forest in central China显示文摘Aims seedlings are vulnerable to many kinds of fatal abiotic and biotic agents,and examining the causes of seedling dynamics can help understand mechanisms of species coexistence.To disentangle the relative importance of neighborhood densities,habitat factors and phylogenetic relatedness on focal seedling survival,we monitored the survival of 5306 seedlings of 104 species>15 months.We address the following questions:(i)How do neighborhood densities,habitat variables and phylogenetic relatedness affect seedling survival?What is the relative importance of conspecific densities,habitat variables and phylogenetic relatedness to seedling survival?(ii)Does the importance of the neighborhood densities,habitat variables and phylogenetic relatedness vary among growth forms,leaf habits or dispersal modes?specially,does the conspecific negative density dependence inhibit tree and decidu-ous seedlings more compared with shrub and evergreen species?Does density dependence affect the wind and animal-dispersed species equally?Methods We established 135 census stations to monitor seedling dynamics in a 25-ha subtropical forest plot in central China.Conspecific and heterospecific seedling density in the 1-m2 seedling plot and adult basal area within a 20-m radius provided neighborhood density var-iables.mean elevation,convexity and aspect of every 5-×5-m grid with seedling plots were used to quantify habitat characteristics.We calculated the relative average phylodiversity between focal seed-ling and heterospecific neighbors to quantify the species related-ness in the neighborhood.Eight candidate generalized linear mixed models with binominal error distribution were used to compare the relative importance of these variables to seedling survival.akaike’s information criteria were used to identify the most parsimonious models.Important Findingsat the community level,both the neighborhood densities and phylogenetic relatedness were important to seedling survival.We found negative effects of increasing conspecific seedlings,which suggested the existence of species-specific density-dependent mortality.Phylodiversity of heterospecific neighbors was negatively related to survival of focal seedlings,indicating similar habitat preference shared among phylogenetically closely related species may drive seedling survival.The relative importance of neighborhood densities,habitat variables and phylogenetic relatedness varied among ecological guilds.Conspecific densities had significant negative effect for deciduous and wind-dispersed species,and marginally significant for tree seedlings>10 cm tall and animal-dispersed species.Habitat variables had limited effects on seedling survival,and only elevation was related to the sur-vival of evergreen species in the best-fit model.We conclude that both negative density-dependent mortality and habitat preference reflected by the phylogenetic relatedness shape the species coex-istence at seedling stage in this forest. | Junmeng Lu Daniel J.Johnson Xiujuan Qiao Zhijun Lu Qinggang Wang Mingxi Jiang | 2015 | Journal of Plant Ecology2015，8，6： | 12 |
| 4 | Ablation of Akt2 and AMPKα2 rescues high fat diet-induced obesity and hepatic steatosis through Parkin-mediated mitophagy显示文摘Given the opposing effects of Akt and AMP-activated protein kinase(AMPK)on metabolic homeostasis,this study examined the effects of deletion of Akt2 and AMPKα2 on fat diet-induced hepatic steatosis.Akt2–Ampkα2 double knockout(DKO)mice were placed on high fat diet for 5 months.Glucose metabolism,energy homeostasis,cardiac function,lipid accumulation,and hepatic steatosis were examined.DKO mice were lean without anthropometric defects.High fat intake led to adiposity and decreased respiratory exchange ratio(RER)in wild-type(WT)mice,which were ablated in DKO but not Akt2^(-/-) and Ampkα2^(-/-) mice.High fat intake increased blood and hepatic triglycerides and cholesterol,promoted hepatic steatosis and injury in WT mice.These effects were eliminated in DKO but not Akt2^(-/-) and Ampkα2^(-/-) mice.Fat diet promoted fat accumulation,and enlarged adipocyte size,the effect was negated in DKO mice.Fat intake elevated fatty acid synthase(FAS),carbohydrate-responsive element-binding protein(CHREBP),sterol regulatory element-binding protein 1(SREBP1),peroxisome proliferator-activated receptor gamma coactivator 1-alpha(PGC-1α),peroxisome proliferator-activated receptor-α(PPARα),PPARγ,stearoyl-CoA desaturase 1(SCD-1),phosphoenolpyruvate carboxykinase(PEPCK),glucose 6-phosphatase(G6Pase),and diglyceride O-acyltransferase 1(DGAT1),the effect was absent in DKO but not Akt2^(-/-) and Ampkα2^(-/-) mice.Fat diet dampened mitophagy,promoted inflammation and phosphorylation of forkhead box protein O1(FoxO1)and AMPKα1(Ser^(485)),the effects were eradicated by DKO.Deletion of Parkin effectively nullified DKO-induced metabolic benefits against high fat intake.Liver samples from obese humans displayed lowered microtubule-associated proteins 1A/1B light chain 3B(LC3B),Pink1,Parkin,as well as enhanced phosphorylation of Akt,AMPK(Ser^(485)),and FoxO1,which were consolidated by RNA sequencing(RNAseq)and mass spectrometry analyses from rodent and human livers.These data suggest that concurrent deletion of Akt2 and AMPKα2 offers resilience to fat diet-induced obesity and hepatic steatosis,possibly through preservation of Parkin-mediated mitophagy and lipid metabolism. | Shuyi Wang Jun Tao Huaguo Chen Machender R.Kandadi Mingming Sun Haixia Xu Gary D.Lopaschuk Yan Lu Junmeng Zheng Hu Peng Jun Ren | 2021 | Acta Pharmaceutica Sinica B2021，11，11： | 4 |
| 5 | Lithospheric structure and dynamic processes of the Tianshan orogenic belt and the Junggar basin显示文摘 | ZHAO Junmeng LIU Guodong LU Zaoxun | 2003 | Tectonophysics2003，，： | 1 |
| 6 | Lithospheric structure and dynamic processes of the Tianshan orogenic belt and the Junggar basin 显示文摘 | Zhao Junmeng Liu Guodong Lu Zaoxun | 2003 | Tectonophysics2003，，： | 1 |
| 7 | Effects of topography on structuring species assemblages in a subtropical forest显示文摘Aims Topography has long been recognized as an important factor in shaping species distributions.Many studies revealed that species may show species-habitat associations.However,few studies inves-tigate how species assemblages are associated with local habitats,and it still remains unclear how the community-habitat associa-tions vary with species abundance class and life stage.In this study,we analyzed the community-habitat associations in a subtropical montane forest.Methods The fully mapped 25-ha(500×500 m)forest plot is located in Badagongshan Nature Reserve in Hunan Province,Central China.It was divided into 625(20×20 m)quadrats.Habitat types were classified by multivariate regression tree analyses that cluster areas with similar species composition according to the topographic characteristics.Indicator species analysis was used to identify the most important species for structuring species assemblages.We also compared the community-habitat associations for two levels of species abundances(i.e.abundant and rare)and three different life stages(i.e.saplings,juveniles and adults),while accounting for sample size effects.Important Findings The Badagongshan plot was divided into five distinct habitat types,which explained 34.7%of the variance in tree species composi-tion.Even with sample size taken into account,community-habi-tat associations for rare species were much weaker than those for abundant species.Also when accounting for sample size,very small differences were found in the variance explained by topography for the three life stages.Indicator species of habitat types were mainly abundant species,and nearly all adult stage indicator species were also indicators in juvenile and sapling stages.Our study manifested that topographical habitat filtering was important in shaping over-all local species compositions.However,habitat filtering was not important in shaping rare species’distributions in this forest.The community-habitat association patterns in this forest were mainly shaped by abundant species.In addition,during the transitions from saplings to juveniles,and from juveniles to adults,the relative importance of habitat filtering was very weak. | Qinggang Wang Ruwan Punchi-Manage Zhijun Lu Scott B.Franklin Zhiheng Wang Yaoqi Li Xiulian Chi Dachuan Bao Yili Guo Junmeng Lu Yaozhan Xu Xiujuan Qiao Mingxi Jiang | 2017 | Journal of Plant Ecology2017，10，3： | 1 |
| 8 | Author correction to‘Ablation of Akt2 and AMPKα2 rescues high fat diet-induced obesity and hepatic steatosis through Parkin-mediated mitophagy’[Acta Pharmaceutica Sinica B 11(2021)3508-3526]显示文摘The authors of the above-mentioned paper noticed an error in Fig.5a as reported.H&E staining was shown in wrong color during figure processing and DKO-LF group was accidently copied and pasted twice.Original H&E images have been replaced with the correct color with the accurate grouping information.No text content in figure legend or conclusion is affected by this error.The authors sincerely apologize for any inconvenience caused to the journal and readers. | Shuyi Wang Jun Tao Huaguo Chen Machender R.Kandadi Mingming Sun Haixia Xu Gary D.Lopaschuk Yan Lu Junmeng Zheng Hu Peng Jun Ren | 2023 | Acta Pharmaceutica Sinica B2023，13，2： | 0 |
| 9 | Lithospheric structure and geodynamics at the northern margin of Tibetan plateau显示文摘A recent integrated geophysical survey has been completed along a transect from Baicheng, Xinjiang to Da Qaidam, Qinghai, China. In this study, wide-angle seismic reflection/refraction exploration with 10 shot points has been carried out to acquire the velocity structure of the crust and uppermost mantle. The earthquake focal mechanism solutions and terrestrial heat flow along the transect have also been obtained and analyzed. Based on the velocity structure of the crust and uppermost mantle along the transect, and combined with the focal mechanism solutions and terrestrial heat flow we develop a geodynamic model for the northern margin of the Tibetan plateau. This model reveals the detailed structure of the crust and uppermost mantle, determines the relationship of basin and range coupling, explores the deep dynamic setting for superposed basins, and establishes the northern boundary condition for Tibetan plateau research. | Junmeng Zhao Fang Lu Zhichun Li Yang Wang Wentao Ma Xun Liu | 2012 | Earthquake Science2012，25，5： | 0 |
| 10 | Engineering Electronic Structure of Single-Atom Pd Site on Ti_(0.87)O_(2)Nanosheet via Charge Transfer Enables C-Br Cleavage for Room-Temperature Suzuki Coupling显示文摘The palladium(Pd)-catalyzed Suzuki reaction is widely applied in the pharmaceutical industry,where constructing highly active and low-cost Pd sites are impendent.Here,we report the fabrication of a heterogeneous Pd/Tio2 catalyst via engineering of an electronic structure of a single Pd_(1)atom on monolayered Ti_(0.87)O_(2)nanosheet(Pd_(1)-Ti_(0.87)O_(2)).This catalyst motivated the kinetically sluggish C-Br cleavage,thus boosting the Suzuki reaction at room temperature.Pd_(1)-Ti_(0.87)O_(2)exhibited an outstanding activity with turnover frequency(TOF)of 11,110 h-1,exceeding that of PdCl_(2)and Pd(OAc)_(2)catalysts by a factor of>200.Various in situ techniques were employed to investigate the C-Br activation process,which showed that Pd_(1)kinetic-feasibly dissociated the chemisorbed bromobenzene,especially the C-Br bond cleavage.Theoretical calculations further revealed that the improved activity is ascribed to the optimized charge state of Pd_(1)within the Pd_(1)O4 realm via charge transfer. | Yangxin Jin Fei Lu Ding Yi Junmeng Li Fengchu Zhang Tian Sheng Fei Zhan Ya’nan Duan Gaochao Huang Jinyang Dong Bo Zhou Xi Wang Jiannian Yao | 2021 | CCS Chemistry2021，3，6： | 0 |
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