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Health effects of PFASs on five major human cancers:A network toxicology perspective on molecular pathogenesis 认领 引用
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作者 Zhen Qi Xuefei Yang +5 位作者 Zhuning Geng Lina Zhang Ziqing Huang Chongwen Shi Qianli Xie Fang Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第4期307-321,共15页
Cohort studies and animal experiments showing the burgeoning human cancer risks associated with per-and polyfluoroalkyl substances(PFASs)have garnered increasing concern.However,research detailing the carcinogenic mec... Cohort studies and animal experiments showing the burgeoning human cancer risks associated with per-and polyfluoroalkyl substances(PFASs)have garnered increasing concern.However,research detailing the carcinogenic mechanisms of PFASs specifically remains limited.Based on network toxicology,and high-throughput sequencing data,we analyzed the carcinogenic effects of perfluorooctanoic acid(PFOA)and perfluorooctane sulfonate(PFOS)in the top five major human cancer types(over 1 million new cases per year):gastric,colorectal,liver,kidney,and breast cancer.A total of 24 pathways associated with PFOS carcinogenesis were enriched,of which 9 pathways were found in different cancers.Notably,Ribosome pathways are enriched in rectal cancer,liver cancer,and kidney cancer.As for PFOA,32 pathways associated with PFOS carcinogenesis were enriched,of which 10 pathways were found in different cancers,notably the peroxisome proliferator-activated receptor(PPAR)signaling pathway is enriched in all five major human cancers.PFOA-induced cancer mainly through the PPAR pathway,while PFOS-induced cancer by disturbing reactive oxygen species and ribosomes.These results indicated that although PFOA and PFOS have analogous structures,they have different mechanisms.This work provides a solid basis for health assessment of PFASs and determining potential pathways before verifying the mechanism of PFASs-induced cancer. 展开更多
关键词 PFASs Network toxicology Carcinogenicity Reactive oxygen species Peroxisome proliferator-activated receptor Ribosome
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Tea polyphenol-fortified parboiled rice as a functional food for obesity prevention via gut microbiota regulation 认领 引用
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作者 Kai Du Qingling Xie +3 位作者 Zhaoxie He Xuefei Yang Xianfeng Du Zhi Zheng 《Food Science and Human Wellness》 SCIE CAS CSCD 2026年第3期1411-1425,共15页
Digestive properties of starch can be significantly modified by its interaction with polyphenols.This study focused on the modulatory effect of tea polyphenol-fortified parboiled rice(TP)on high-fat diet(HFD)-induced ... Digestive properties of starch can be significantly modified by its interaction with polyphenols.This study focused on the modulatory effect of tea polyphenol-fortified parboiled rice(TP)on high-fat diet(HFD)-induced obesity in mice through the regulation of gut microbiota.TP was prepared with parboiled rice(PR)by soaking with tea polyphenols(TPs).The results showed that average body weight of mice fed with an HFD containing PR(PR-H)or TP(TP-H)decreased by 24.5%and 48.7%,compared with the group of an HFD containing white rice(WR-H),respectively.The levels of total triglyceride and total cholesterol were ranked as WR-H>PR-H>TP-H.Histological sections of the liver and epididymal adipose tissue showed that TP reduced lipid accumulation in mice fed with an HFD.Additionally,TP enhanced the liver antioxidant capacity and reduced oxidative damage in mice,thereby ameliorating liver oxidative stress caused by the HFD.Besides,TP modified the microbial community of mice by improving the gut microbiota diversity with the abundance of Akkermansiaceae,Muribaculaceae,and Bacteroidaceae increased.These findings suggested that TP can improve the intestinal microecological environment of mice,regulate lipid metabolism levels,and thereby exert a certain anti-obesity effect. 展开更多
关键词 Tea polyphenol High-fat diet Obesity Gut microbiota
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Topology Optimization for Variable Thickness Shell-Infill Composites Based on Stress Analysis Preprocessing 认领 引用 被引量：1
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作者 Xuefei Yang Ying Zhou +1 位作者 Liang Gao Hao Li 《Computers, Materials & Continua》 SCIE EI 2025年第10期613-635,共23页
Inspired by natural biomimetic structures exemplified by femoral bones,the shell-infill composite design has emerged as a research focus in structural optimization.However,existing studies predominantly focus on unifo... Inspired by natural biomimetic structures exemplified by femoral bones,the shell-infill composite design has emerged as a research focus in structural optimization.However,existing studies predominantly focus on uniform-thickness shell designs and lack robust methodologies for generating high-resolution porous infill configurations.To address these challenges,a novel topology optimization framework for full-scale shell-filled composite structures is developed in this paper.First,a physics-driven,non-uniform partial differential equation(PDE)filter is developed,enabling precise control of variable-thickness shells by establishing explicit mapping relationships between shell thickness and filter radii.Second,this study addresses the convergence inefficiency of traditional full-scale topology optimization methods based on local volume constraints.It is revealed that a reduced influence radius exacerbates algorithm convergence challenges,thereby impeding the design of intricate porous structures.To overcome this bottleneck,a physics-driven stress skeleton generation method is developed.By integrating stress trajectories and rasterization processing,this method constructs an initial density field,effectively guiding material evolution and significantly enhancing convergence in porous structural optimization within the full-scale framework.Classical numerical examples demonstrate that our proposed optimization framework achieves biomimetic non-uniform shell thickness optimization and enables precise control of the shell thickness.Additionally,density preprocessing effectively eliminates intermediate density regions and void aggregation.Moreover,the generated trabecular-like infill patterns with spatially graded porosity,akin to multiscale topology optimization(MTO),provide an innovative solution for multifunctional,lightweight,complex shell-infill composite structures in aerospace and biomedical applications. 展开更多
关键词 Topology optimization shell-infill structure bionic structural design composite structure
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Diversity and traditional knowledge concerning fodder plants are invaluable assets for enhancing the sustainable management of croplivestock system of Zhaotong City in the mountainous southwest China 认领 引用
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作者 Xian Chen Pyae Phyo Hein +4 位作者 Mengxue Shi Fen Yang Jun Yang Yao Fu Xuefei Yang 《Plant Diversity》 SCIE CAS CSCD 2025年第2期311-322,共12页
The global rise in animal protein consumption has significantly amplified the demand for fodder.A comprehensive understanding of the diversity and characteristics of existing fodder resources is essential for balanced... The global rise in animal protein consumption has significantly amplified the demand for fodder.A comprehensive understanding of the diversity and characteristics of existing fodder resources is essential for balanced nutritional fodder production.This study investigates the diversity and composition of fodder plants and identifies key species for cattle in Zhaotong City,Yunnan,China,while documenting indigenous knowledge on their usage and selection criteria.Ethnobotanical surveys were conducted in 19 villages across seven townships with 140 informants.Data were collected through semi-structured interviews,free listing,and participatory observation,and analyzed using Relative Frequency Citation.A total of 125 taxa(including 106 wild and 19 cultivated)were reported.The most cited family is Poaceae(27 taxa,21.43%),followed by Asteraceae(17 taxa,13.49%),Fabaceae(14 taxa,11.11%),Polygonaceae(9 taxa,7.14%)and Lamiaceae(4 taxa,3.17%).The whole plant(66.04%)and herbaceous plants(84.80%)were the most used parts and life forms.The most cited species were Zea mays,Brassica rapa,Solanum tuberosum,Eragrostis nigra,and Artemisia dubia.Usage of diverse fodder resources reflects local wisdom in managing resource availability and achieving balanced nutrition while coping with environmental and climatic risks.Preferences for certain taxonomic groups are due to their quality as premier fodder resources.To promote integrated crop-livestock farming,we suggest further research into highly preferred fodder species,focusing on nutritional assessment,digestibility,meat quality impacts,and potential as antibiotic alternatives.Establishing germplasm and gene banks for fodder resources is also recommended. 展开更多
关键词 Fodder plant Animal husbandry Zhaotong city Ethnobotany Traditional knowledge Beef cattle
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Recent Progress in Preparation and Application of Nano-Chitin Materials 认领 引用 被引量：10
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作者 Xuefei Yang Jie Liu +2 位作者 Ying Pei Xuejing Zheng Keyong Tang 《Energy & Environmental Materials》 SCIE EI CAS 2020年第4期492-515,共24页
Chitin is a kind of natural macromolecule material which was first discovered in mushrooms and was widely found in the shells of crustaceans and arthropods,the cell walls of fungi(yeast and mold)and algae,and the moll... Chitin is a kind of natural macromolecule material which was first discovered in mushrooms and was widely found in the shells of crustaceans and arthropods,the cell walls of fungi(yeast and mold)and algae,and the mollusks.The original chitin in nature usually has an antiparallel molecular chain alignment forming nanofibers connected by inter-and intramolecular hydrogen bonds.These microfibers consist of nanofibers about 2-5 nm in diameter,and about 300 nm long,embedded by protein matrices.Due to their unique dimensional,optical,mechanical,and other characteristics,the preparation of nano-chitin materials is an important subject.It is possible to extract nano-chitins from their sources with various methods,including acid hydrolysis,mechanical disintegration,TEMPO-mediated oxidation,electrospinning,and others.In this article,the latest progress in recent years in the preparation and applications of nano-chitin were reviewed.The morphology of the nano-chitins obtained from the above methods was presented.The advantages and disadvantages of each method were analyzed.An overview of applications of nano-chitins was discussed,including biomedicine,food applications,water treatment,green electronic materials,enzyme immobilization carriers,cotton textile materials,cosmetics,and others. 展开更多
关键词 applications nano-chitin preparation methods structure
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Dolomitization by Penesaline Sea Water in Early Cambrian Longwangmiao Formation, Central Sichuan Basin, China 认领 引用 被引量：11
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作者 Xuefei Yang Hao Tang +2 位作者 Xingzhi Wang Yaping Wang Yueming Yang 《Journal of Earth Science》 SCIE CAS CSCD 2017年第2期305-314,共10页
The Lower Cambrian Longwangmiao Formation shoal dolostone reservoir in Sichuan Basin is currently an exploration and research highlight in China. Reservoir rocks mainly consist of crystalline dolomite with residual gr... The Lower Cambrian Longwangmiao Formation shoal dolostone reservoir in Sichuan Basin is currently an exploration and research highlight in China. Reservoir rocks mainly consist of crystalline dolomite with residual grain texture, and dolarenite of which the arene is mainly composed of muddy to micritic dolomite with some crystalline grain directionally aligned. The trace element indicates that the dolomites of Longwangmiao Formation may be related to the high salinity of sea water. The oxygen isotope values of crystalline dolomite and dolarenite are both similar to that of the Early Cambrian marine dolomites, and the carbon isotope values of every kind of dolomites are completely overlapped with that of the seawater in Early Cambrian, indicating the dolomitization fluid is originated from the Early Cambrian sea water. The restricted marine biological communities and a small amount of gypsum pseudonodule seen in muddy to micritic dolomite indicate that the sea water in Early Cambrian was restricted and evaporated. However, the general lack of massive evaporite mineral and gypsum karst breccia indicates that the salinity of sea water during dolomitization was lower than the value of gypsum＇s precipitation. The Longwangmiao Formation consists of several high-frequency sedimentary cycles, indicating frequent sea level changes. This study indicates that massive dolomitization may also occur in underwater palaeohigh in carbonate platform through the reflux of penesaline sea water driven by a combination of high-and low-frequency sea-level changes. This kind of dolomitization can explain the generation of massive dolomites in the absence of evaporite precipitation, and further indicates that replacement dolomites can be produced by sea water with a wide range of salinity（normal, penesaline to hypersaline）. 展开更多
关键词 Penesaline sea water Dolomitization Early Cambrian Longwangmiao Formation central Sichuan Basin
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Building a better plant world through mutual learning: An introduction to a special issue on plant diversity and conservation in the Belt & Road Countries 认领 引用
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作者 Xuefei Yang Yongping Yang 《Plant Diversity》 SCIE CAS CSCD 2019年第3期133-134,共2页
Plants play important roles in international trade and cultural exchange. Mention of the Silk Road instantly conjures images of plants and plant products, from the tea of China (Lagarde, 2017), to pepper, flax, spices... Plants play important roles in international trade and cultural exchange. Mention of the Silk Road instantly conjures images of plants and plant products, from the tea of China (Lagarde, 2017), to pepper, flax, spices, grapes, and pomegranates of South and Central Asia (Xi, 2017). In 2015, when China officially launched the Belt and Road Initiative (BRI), biodiversity conservation was repeatedly emphasized in joint communiques of the Leaders' Roundtable of the Belt and Road Forum for International Cooperation. However, our knowledge of both plant diversity and conservation in the Belt and Road Countries is limited, which hampers our planning and implementation on the eco-friendly infrastructural projects as promoted by the BRI. To promote regional cooperation and knowledge sharing on plant diversity and conservation, in September 2018, the Kunming Institute of Botany (KIB), under the sponsorship of Chinese Academy of Sciences (CAS), organized an international workshop entitled “International Workshop on Plant Diversity and Conservation of the One Belt and One Road Countries.” This special issue of Plant Diversity presents some of the outcomes of the workshop. 展开更多
关键词 play international tea
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Lithofacies paleogeography of the Ordovician and its petroleum exploration potential in the Middle-Upper Yangtze Area,South China 认领 引用
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作者 Wenzheng Li Hua Jiang +7 位作者 Xiaodong Fu Yuan He Mingfeng Gu Nan Su Shiyu Ma Shugen Liu Yongxiao Wang Xuefei Yang 《Petroleum》 EI CSCD 2025年第4期440-453,共14页
Based on the drilling,logging and field analysis,this paper discusses the lithofacies paleogeography of the Ordovician and its petroleum potential in the Middle-Upper Yangtze Area,South China.Results show that Ordovic... Based on the drilling,logging and field analysis,this paper discusses the lithofacies paleogeography of the Ordovician and its petroleum potential in the Middle-Upper Yangtze Area,South China.Results show that Ordovician of the Middle-Upper Yangtze Region can be divided into Tongzi Formation,Honghuayuan Formation,Meitan Formation,Shizipu Formation,Pagoda Formation,Linxiang Formation and Wufeng Formation from bottom to top.During the Early Ordovician Tongzi Period and Honghuayuan Period(Tremadocian Stage),a carbonate rimmed platform developed in the study area with lots of grain shoals in Guangyuan-Weiyuan Areas and Lichuan-Tongzi Areas of Southeastern Sichuan Basin.To the Meitan Period(Floian and Dapingian and Early Darriwilian Stage),a mixed carbonate platform with clastic sedimentary rock deposition developed in study area.In Middle-late Ordovician Shizipu and Linxiang-Pagoda Period(Late Darriwilian and Hirnantian-Sandbian Stage),a carbonate ramp developed in Middle-Upper Yangtze Region.At the end of the Ordovician(Hirnantian Stage),Wufeng Formation deposited in a retention basin due to the restriction of peripheral uplift and paleo-land.Two sets of reservoir-source assemblages developed in the Ordovician,with three sets of source rocks developed in the study area.First,the lower Cambrian Qiongzhusi Formation acted as the main source rock,and the hydrocarbon migrated upward to the Ordovician reservoir along the fault.Second,the Wufeng-Longmaxi Formation acted as source rock,and hydrocarbon migrated to the Lower Ordovician along the karst crust and the fault.Third,the Lower Ordovician Meitan-Shizipu Formation acted as source rock,hydrocarbon can migrate upward to the upper Ordovician reservoir directly,which deserves exploration attention. 展开更多
关键词 Middle-upper Yangtze Region Sichuan Basin Ordovician Lithofacies paleogeography Hydrocarbon accumulation model
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Chemical composition and pharmacological activities of Polygonum cuspidatum 认领 引用
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作者 Yi’an Shi Luming Pan +4 位作者 Jiayi Bi Xuefei Yang Jing Sun Meng Zhang Yu Chen 《Asian Journal of Traditional Medicines》 2022年第3期108-115,共8页
Polygonum cuspidatum is a traditional Chinese medicine,and its medicinal part is dry rhizome.It is mainly used to treat damp heat jaundice,burns,carbuncle,ulcer poisoning,amenorrhea,and snake bite.Recent studies have ... Polygonum cuspidatum is a traditional Chinese medicine,and its medicinal part is dry rhizome.It is mainly used to treat damp heat jaundice,burns,carbuncle,ulcer poisoning,amenorrhea,and snake bite.Recent studies have found that P.cuspidatum also contains active ingredients against coronaviruses.This paper reviews the chemical constituents and pharmacological activities of P.cuspidatum,so as to provide a scientific basis for the development and utilization of P.cuspidatum resources in the future. 展开更多
关键词 Polygonum cuspidatum chemical composition pharmacological activity
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Investigation on the anti-T3SS activity of Myanmar vegetables and identification of arjunglucosideⅡas a T3SS inhibitor from Ludwigia adscendens 认领 引用 被引量：1
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作者 Luyao Bai Dongdong Zhang +2 位作者 Yan Liu Xuefei Yang Chunhua Lu 《Journal of Future Foods》 CAS CSCD 2026年第1期73-81,共9页
Vegetables are not only important dietary components in maintaining our daily life,but also potential resources for healing diseases.Myanmar is endowed with diverse vegetable species and many are also used as traditio... Vegetables are not only important dietary components in maintaining our daily life,but also potential resources for healing diseases.Myanmar is endowed with diverse vegetable species and many are also used as traditional medicines.In this study,we investigated 48 vegetable samples from central Myanmar for their inhibitory activities against the typeⅢsecretion system(T3SS)of Salmonella enterica serovar Typhimurium,one of the most prevalent pathogenic bacteria that causes infections.Results showed that 15 vegetables exhibited moderate to strong inhibitory activities against the secretion of T3SS effector proteins,providing the scientific evidence for the traditional knowledge of vegetables and their potential pharmacological function.By detailed chemical investigation,we found the vegetables,i.e.,Archidendron jiringa(Jack)Nielsen.,Neptunia plena(Linn.)Benth.and Ludwigia adscendens(L.)Hara have the potential for discovering the components with anti-T3SS activity.Bio as say-guided isolation of L.adscendens led to identify arjunglucosideⅡas a new T3SS inhibitor. 展开更多
关键词 Myanmar vegetables Salmonella TypeⅢsecretion system Infectious disease Ludwigia adscendens
SHH1 cooperates with the DNA methylation reader MBD7 to suppress transcriptional silencing of promoter-methylated genes in Arabidopsis 认领 引用
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作者 Yaqiang Lu Shuang Jia +14 位作者 Rongjing Guo Mengtian Wu Hongzhou Wang Shuang Gao Zhaoqun Li Qianru Ma Yaqian Hu Chang Liu Xingxing Liu Tinghui Wang He Li Jie Gao Jun Li Xuefei Yang Dongming Li 《Plant Communications》 SCIE CSCD 2026年第1期110-125,共16页
In Arabidopsis thaliana,METHYL-CpG-BINDING DOMAIN 7(MBD7)and its associatedα-crystallin domain(ACD)proteins form a complex that interprets DNA methylation to prevent the silencing of methylated luciferase(LUC)reporte... In Arabidopsis thaliana,METHYL-CpG-BINDING DOMAIN 7(MBD7)and its associatedα-crystallin domain(ACD)proteins form a complex that interprets DNA methylation to prevent the silencing of methylated luciferase(LUC)reporter transgenes.However,the mechanism by which the MBD7 complex effectively targets methylated transgenes remains largely unclear.Here,we identify a novel role for SAWADEE HOMEODOMAIN HOMOLOG 1(SHH1),extending its function beyond the canonical RNA-directed DNA methylation(RdDM)pathway.We demonstrate that SHH1 prevents the transcriptional silencing of methylated LUC transgenes and a subset of endogenous genes by acting in concert with MBD7 within the same regulatory pathway.SHH1 co-localizes with MBD7 at nuclear foci and physically interacts with it to enhance its stability.Furthermore,SHH1 binds to methylated loci via its SAWADEE domain,which recognizes the H3K9me2 histone mark.This interaction promotes the reciprocal recruitment of SHH1 and MBD7 to methylated loci,revealing a cooperative mechanism that maintains transcriptional activity at promoter-methylated genes.Collectively,our findings unveil a dynamic,mutually reinforcing SHH1-MBD7 module that enhances the expression of promoter-methylated genes,likely by facilitating effective binding to chromatin marked by repressive epigenetic modifications.This work provides important insights into how DNA methylation fine-tunes gene expression in plants by balancing between transcriptional repression and activation. 展开更多
关键词 SAWADEE domain SHH1 MBD7 complex DNA methylation anti-silencing
Influence of stress sensitivity on pore structure of tight reservoirs: A Digital core based analysis 认领 引用 被引量：1
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作者 Hong He Xuefei Yang +4 位作者 Yuexiang Hao Yizhen Li Benqiang Wang Yi Liu Yuanlin Wang 《Petroleum Research》 EI CAS CSCD 2025年第3期659-666,共8页
During the development of tight reservoirs,as the formation pressure decreases,the effective stress on the rock matrix increases.This leads to rock deformation and,consequently,changes in the physical parameters of th... During the development of tight reservoirs,as the formation pressure decreases,the effective stress on the rock matrix increases.This leads to rock deformation and,consequently,changes in the physical parameters of the reservoirs,affecting reservoir productivity.Therefore,it is crucial to identify the influence of stress variation on the pore structure of tight reservoirs at the pore scale.Based on 3D grayscale images of representative samples under different confining pressures using micrometer computed tomography,this study obtained corresponding 3D digital cores through binary segmentation using the maximum class spacing algorithm.Based on digital cores with the same physical size under different confining pressures,the binary data volume was subtracted using a Boolean algorithm to obtain the pore variation space under different confining pressures.The pore variation and permeability damage rate under different confining pressures were then determined.Pore network models of digital cores under different confining pressures were extracted using the maximal ball algorithm,and the corresponding pore-throat radius distribution,coordination number distribution,length/diameter ratio,and shape factor distribution were calculated.The results show that as the confining pressure increases,the pore-throat distribution curve shifts to the direction of smaller pore-throats,the average coordination number decreases,and the throat length/diameter ratio distribution curve and shape factor distribution curve shift to the direction of larger pore-throats.This is because compaction reduces pores and throats,decreases the overall pore-throat connectivity,narrows the throats,and makes the crosssections of the pore-throats more circular.This research serves as a basic platform for efficient development under stress sensitivity in tight reservoirs,and its findings have important academic significance and practical application value. 展开更多
关键词 Tight reservoir Digital core Stress sensitivity Damage rate Pore-throat structure
Prized edible Asian mushrooms: ecology, conservation and sustainability 认领 引用 被引量：15
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作者 Peter E.Mortimer Samantha C.Karunarathna +11 位作者 Qiaohong Li Heng Gui Xueqing Yang Xuefei Yang Jun He Lei Ye Jiayu Guo Huili Li Phongeun Sysouphanthong Dequn Zhou Jianchu Xu Kevin D.Hyde 《Fungal Diversity》 SCIE 2012年第5期31-47,共17页
Mushrooms can be found in forests worldwide and have long been exploited as resources in developed economies because of their important agro-industrial,medicinal and commercial uses.For less developed countries,such a... Mushrooms can be found in forests worldwide and have long been exploited as resources in developed economies because of their important agro-industrial,medicinal and commercial uses.For less developed countries,such as those within the Greater Mekong Subregion,wild harvesting and mushroom cultivation provides a much-needed alternative source of income for rural households.However,this has led to over-harvesting and ultimately environmental degradation in certain areas,thus management guidelines allowing for a more sustained approach to the use of wild mushrooms is required.This article addresses a selection of the most popular and highly sought after edible mushrooms from Greater Mekong Subregion:Astraeus hygrometricus,Boletus edulis,Morchella conica,Ophiocordyceps sinensis,Phlebopus portentosus,Pleurotus giganteus,Termitomyces eurhizus,Thelephora ganbajun,Tricholoma matsuake,and Tuber indicum in terms of value,ecology and conservation.The greatest threat to these and many other mushroom species is that of habitat loss and over-harvesting of wild stocks,thus,by creating awareness of these issues we wish to enable a more sustainable use of these natural products.Thus our paper provides baseline data for these fungi so that future monitoring can establish the effects of continued harvesting on mushroom populations and the related host species. 展开更多
关键词 Mushroom species Greater Mekong Sub-region Medicinal foods Non-timber forest products
Opposing intraspecific vs.interspecific diversity effects on herbivory and growth in subtropical experimental tree assemblages 认领 引用 被引量：11
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作者 Christoph Z.Hahn Pascal A.Niklaus +6 位作者 Helge Bruelheide Stefan G.Michalski Miaomiao Shi Xuefei Yang Xueqin Zeng Markus Fischer Walter Durka 《Journal of Plant Ecology》 SCIE CSCD 2017年第1期242-251,共10页
Aims Positive plant diversity-ecosystem function relations are ultimately driven by variation in functional traits among individuals that form a community.To date,research has largely focused on the role of species di... Aims Positive plant diversity-ecosystem function relations are ultimately driven by variation in functional traits among individuals that form a community.To date,research has largely focused on the role of species diversity for ecosystem functioning.However,substantial intraspecific trait variation is common and a significant part of this variation caused by genetic differences among individuals.Here,we studied the relative importance of species diversity and seed family(SF)diversity within species for growth and herbivory in experimental subtropical tree assemblages.Methods In 2010,we set up a field experiment in subtropical China,using four species from the local species pool.Trees were raised from seeds,with seeds from the same mother tree forming an SF.We established 23 plots containing one or four species(species diversity treatment)and one or four SFs per species(SF diversity treatment).Tree growth(stem diameter,plant height and crown expansion)and herbivory(percentage leaf loss due to leaf chewers)were monitored annually from 2011 to 2013.Important findings Tree species richness promoted growth but had no effect on herbivory.In contrast,SF diversity reduced growth and increased herbivory but only so in species mixtures.Most of the observed effects were time dependent,with the largest effect found in 2013.Our results suggest that biodiversity can affect plant performance directly via tree species-species interactions,or context dependent,via potential effects on inter-trophic interactions.Two important conclusions should be drawn from our findings.Firstly,in future studies regarding biodiversity and ecosystem functioning(BEF)relationships,intraspecific genetic diversity should be given similar weight as species diversity as it has often been neglected and its effects are not well understood.Secondly,we demonstrate opposite effects of biodiversity among and within species,stressing the importance to consider the effects of multiple levels of biodiversity simultaneously. 展开更多
关键词 BEF-China species diversity genetic diversity growth herbivory
Impact of tree diversity and environmental conditions on the survival of shrub species in a forest biodiversity experiment in subtropical China 认领 引用 被引量：9
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作者 Bo Yang Ying Li +10 位作者 Bingyang Ding Sabine Both Alexandra Erfmeier Werner Härdtle Keping Ma Bernhard Schmid Thomas Scholten Gunnar Seidler Goddert von Oheimb Xuefei Yang Helge Bruelheide 《Journal of Plant Ecology》 SCIE CSCD 2017年第1期179-189,共11页
Aims Although shrubs are an important component of forests,their role has not yet been considered in forest biodiversity experiments.In the biodiversity-ecosystem functioning(BEF)experiment with subtropical tree speci... Aims Although shrubs are an important component of forests,their role has not yet been considered in forest biodiversity experiments.In the biodiversity-ecosystem functioning(BEF)experiment with subtropical tree species in south-east China(BEF-China),we factorially combined tree with shrub species-diversity treatments.Here,we tested the hypotheses that shrub survival differs between the 10 planted shrub species,with lower survival rates of late-than early-successional species and is affected by environmental conditions,such as topography and top soil characteristics,as well as by biotic factors,represented by tree,shrub and herb layer characteristics.Methods We analyzed the survival of 42000 shrub individuals in 105 plots varying in tree and shrub species richness of the BEF-China project four years after planting.Shrub survival was analyzed with generalized linear mixed effects models at the level of individuals and with variance partitioning at the plot level.Random intercept and random slope models of different explanatory variables were compared with respect to the Bayesian Information Criterion(BIC).Important Findings Survival rates differed largely between the 10 shrub species,ranging from 26%to 91%for Ardisia crenata and Distylium buxifolium,respectively.Irrespective of species identity,single abiotic factors explained up to 5%of species survival,with a negative effect of altitude and slope inclination and a positive effect of the topsoil carbon to nitrogen ratio,which pointed to drought as the major cause of shrub mortality.In contrast,neither tree nor shrub richness affected shrub survival at this early stage of the experiment.Among the biotic predictors,only herb layer species richness and cover of the dominant fern species(Dicranopteris pedata)affected shrub survival.Overall,our models that included all variables could explain about 65%in shrub survival,with environmental variables being most influential,followed by shrub species identity,while tree species diversity(species richness and identity)and herb layer characteristics contributed much less.Thus,in this early stage of the experiment the biotic interactions among shrubs and between shrubs and trees have not yet overruled the impact of abiotic environmental factors. 展开更多
关键词 BEF-China biodiversity-ecosystem functioning experiment forest herb layer plant survival shrub species richness
Climate change effects fruiting of the prize matsutake mushroom in China 认领 引用 被引量：7
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作者 Xuefei Yang Eike Luedeling +5 位作者 Guangli Chen Kevin D.Hyde Youji Yang Dequn Zhou Jianchu Xu Yongping Yang 《Fungal Diversity》 SCIE 2012年第5期189-198,共10页
Climate change affects various facets of life but there is little data on its effects on wild mushroom fruiting.Yunnan Province in China is a rich source of wild mushrooms and has experienced a temperature rise over r... Climate change affects various facets of life but there is little data on its effects on wild mushroom fruiting.Yunnan Province in China is a rich source of wild mushrooms and has experienced a temperature rise over recent decades.This has resulted in warmer temperatures but the impacts of these changes on mushroom production lack documentation.We collected data on the fruiting of the highly prized matsutake mushroom(Tricholoma matsutake)in West Yunnan,China over an 11 year period from 2000 to 2010.Fruiting phenology and productivity were compared against the driving meteorological variables using Projection to Latent Structure regression.The mushrooms appeared later in the season during the observation period,which is most likely explained by rising temperatures and reduced rain during May and June.High temperature and abundant rain in August resulted in good productivity.The climate response of matsutake production results from a sequence of processes that are possibly linked with regulatory signals and resource availability.To advance the knowledge of this complex system,a holistic research approach integrating biology,ecology,genetics,physiology,and phytochemistry is needed.Our results contribute to a general model of fungal ecology,which can be used to predict the responses of fungi to global climate change. 展开更多
关键词 Fruiting Phenology Productivity Response Projection to Latent Structures regression Tricholoma matsutake Yunnan
Sedimentary characteristics and lithofacies paleogeography of the Cambrian in Sichuan basin,Southwest China 认领 引用 被引量：6
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作者 Lin Xie Xuefei Yang +5 位作者 Yanhong Zhang Yan Xu Deming Zeng Ruifeng Tang Yao Du Xingzhi Wang 《Petroleum》 EI CSCD 2024年第2期224-242,共19页
Cambrian in Sichuan basin developed thick black shale,varies carbonate and clastic rock,which deposited in different sedimentary environment.Sichuan basin in the upper Yangtze platform contained a record of environmen... Cambrian in Sichuan basin developed thick black shale,varies carbonate and clastic rock,which deposited in different sedimentary environment.Sichuan basin in the upper Yangtze platform contained a record of environment during the Cambrian.Detail facies analyses of Cambrian enable us to discuss the sedimentary environment and palaeogeographic setting.Sedimentation commenced in the Early Cambrian with the deposition of shelf facies(Qiongzhusi Formation and Canglangpu Formation).At this stage,thick shale and clastic rock deposited in Sichuan basin.At the end of the Early Cambrian,a carbonate platform developed in upper Yangtze platform,and Sichuan basin was located in restricted platform(Longwangmiao Formation).In the Middle Cambrian,tidal flat and restricted platform developed in Sichuan basin(Douposi Formation),because of continuous regression.During the Late Cambrian,Sichuan basin was located in carbonate platform again(Xixiangchi Formation).There are three types of sedimentary system in the Cambrian of Sichuan basin:clastic sedimentary system,clastics-carbonate mixed sedimentary system and carbonate sedimentary system.Vertically,the basin shows the evolutionary character of clastic-carbonate sedimentary systems.The three sedimentary systems correspond to three“transgression-regression”cycles of the Cambrian.The transgression in the initial period of the Early Cambrian led to the formation of clastic sedimentary system in the Qiongzhusi Formation of Lower Cambrian.The transgression in the later period of the Early Cambrian led to the formation of clasticcarbonate mixed sedimentary system in the Middle-Lower Cambrian.The transgression in the initial period of the Late Cambrian led to the formation of carbonate sedimentary system in the Xixiangchi Formation of Upper Cambrian.With the end of Late Sinian continental rifting ended,Sichuan basin entered a stable evolutionary stage of the craton basin,while the paleo-land developed in the north and southwest.In Qiongzhusi-Canglangpu period,the basin developed onshore-shelf sedimentary facies from west to east;In Longwangmiao-Xixiangchi period,the basin developed tidal flat-platform-slope sedimentary facies from west to east. 展开更多
关键词 Sichuan basin Cambrian Sedimentary characteristics Lithofacies paleogeography
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Evaluation of dolomite reservoirs in the Longwangmiao Formation,Lower Cambrian in Northern Sichuan basin,China 认领 引用 被引量：4
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作者 Xuefei Yang Yaping Wang +3 位作者 Xingzhi Wang Deming Zeng Longbo Xu Zisang Huang 《Petroleum》 2017年第4期406-413,共8页
With the extended petroleum exploration of the carbonate reservoir in the Longwangmiao Formation,Lower Cambrian in Sichuan basin,looking for a new favorable exploration area is the primary task in current exploration.... With the extended petroleum exploration of the carbonate reservoir in the Longwangmiao Formation,Lower Cambrian in Sichuan basin,looking for a new favorable exploration area is the primary task in current exploration.This paper focusing on the dolomite reservoir in the Longwangmiao Formation in the Northern Sichuan basin,will evaluate the reservoir conditions,including reservoir lithology,reservoir spaces,physical properties and other basic characteristics.Combined with sedimentary environment study and diagenesis analysis,the genetic mechanism of Longwangmiao reservoir in study area will be discussed.It indicates that the reservoir rocks of Longwangmiao Formation in the study area are composed of dolarenite and crystalline dolomite,and the main reservoir spaces are intergranular dissolved pores,intragranular dissolved pores and intercrystalline dissolved pores.However,most of dissolved pores have been filled with bitumen,which lead to the reservoir properties very poor,both the porosity and permeability are worse than that of central Sichuan basin,so the reservoir in the Longwangmiao Formation in the Northern Sichuan basin is low-porosity and low-permeability reservoir.During the Early Cambrian Longwangmiao period,the study was near the old-land,and the energy of sea water was not enough to deposit many grain shoals,which cause the sediments are small with lots of quartz and muds.Moreover,because lacking of large scale karstification in the late diagenesis,there isn't much dissolved pores and vugs develop in the Longwangmiao Formation.Some Intergranular dissolved pores and intercrystalline dissolved pores formed by the early atmosphere water dissolved exist as some reservoir spaces,but most of them have been filled with bitumen,which was residual when the ancient oil reservoir transformed.Above factors cause the Longwangmiao Formation in the Northern Sichuan basin become not a very favorable reservoir in Sichuan basin. 展开更多
关键词 Reservoir evaluation Dolomites Longwangmiao Formation Northern Sichuan basin
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Pore-fillings of dolomite reservoirs in Sinian Dengying Formation in Sichuan basin 认领 引用 被引量：2
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作者 Chao Chen Xuefei Yang +4 位作者 Xingzhi Wang Deming Zeng Mingyou Feng Lin Xie Xiang Li 《Petroleum》 EI CSCD 2020年第1期14-22,共9页
The Sinian Dengying Formation in the Sichuan basin is an important potential reservoir for oil and gas exploration in the periphery of the Sichuan basin.Its reservoirs were well developed.And many kinds of fillings wh... The Sinian Dengying Formation in the Sichuan basin is an important potential reservoir for oil and gas exploration in the periphery of the Sichuan basin.Its reservoirs were well developed.And many kinds of fillings which lead to the decrease of pores can be seen in reservoir pores and caves.In this paper,the pore fillings of the Dengying Formation reservoir in Sichuan basin are the object of study.The types and characteristics of the fillings are studied in detail by means of rock slices analysis,cathode luminescence,trace elements and inclusion temperature measurement.The study shows that the fillings include dolomite fillings and siliceous quartz fillings and bitumen fillings.Among them,dolomite fillings can be divided into botryoidal dolomite fillings,foliated dolomite fillings,finely-medium crystalline dolomite fillings and coarse crystalline dolomite fillings.50%–80%of the pores are filled by the dolomite fillings with botryoidal structure,and the pores can be partially full filled;0%–20%of pores are filled by foliated dolomite fillings;20–80%of the pores are filled by finely-medium dolomite fillings;20–80%of the pores are filled by coarse crystalline dolomite fillings.1%–5%of secondary pores are often filled by siliceous quartzs,and the pores can be partially full filled.Bitumen fillings often occur after the above-mentioned fillings,and the residual pores are often semi-filled by bitumens,which makes the original pores and throat smaller and reduces the effective porosity and permeability of the reservoir.So,it is a destructive diagenesis.The pore fillings make the secondary porosity in the reservoir significantly lower,which is not conducive to the formation and preservation of the Dengying Formation reservoir. 展开更多
关键词 Pore fillings Reservoir Dengying formation Sichuan basin
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Mottled dolomite in the lower Cambrian Longwangmiao formation in the Northern Sichuan Basin,South China 认领 引用 被引量：1
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作者 Xuefei Yang Hao Tang +5 位作者 Junyi Zhang Yao Du Ruifeng Tang Shuang Pan Xiang Zhou Yan Xu 《Petroleum》 EI CSCD 2024年第1期19-29,共11页
At the end of Early Cambrian time,the Sichuan basin(South China)was located in a wide carbonate platform,with hundreds of meters of carbonate deposited.The Longwangmiao Formation carbonate in Sichuan basin is partiall... At the end of Early Cambrian time,the Sichuan basin(South China)was located in a wide carbonate platform,with hundreds of meters of carbonate deposited.The Longwangmiao Formation carbonate in Sichuan basin is partially to completely dolomitized,displaying a mottled texture in the northern area of the exposure.The mottled dolomitic limestone developed parallel to bedding,with shape irregular boundaries with limestone that has not been dolomitized.The mottled dolomite is composed of powder crystalline and finely crystalline dolomite,while the matrix limestone is composed of micritic calcite.the isotopic composition of mottled dolomite(δ13C=+0.29‰PDB,δ18O=1.15‰PDB)is similar to that of micrite calcite(δ13C=0.49‰PDB,δ18O=1.45‰PDB).Both isotopic values and trace element data indicate that the dolomitized fluid is originated from sea water.Some beds contain gypsum pseudomorphs and mud cracks,indicating a shallow and evaporative environment with local high salinity during deposition.Dolomitization likely took place early,in part as a result of sea water salinity concentration.Trace fossils thalassinoides horizontalis,thalassinoides callianassa and planolites developed in the Longwangmiao Formation,and the sharp edges of mottled dolomite are similar to these trace fossils.The beds are intensely bioturbated.In the burrow network,the sediments and burrow fill were coarse and loose with little clay,and it is interpreted here as being easier to be dolomitized than the surrounding sediments.Partial dolomitization is thus interpreted to have occurred in the burrow system,and the degree of dolomitization was related to the degree of bioturbation,which is controlled by the trace-making creatures. 展开更多
关键词 Mottled dolomite Dolomitization Longwangmiao Formation Early Cambrian Northern Sichuan basin
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