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Alpine grassland degradation intensifies the burrowing behavior of small mammals:evidence for a negative feedback loop

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Integrative Zoology 2024年第2期19卷 240-252页

作者： Zaiwei WANG Jiawen YAN Amy MARTIN Dianne HBRUNTON Jiapeng QU jin-sheng he Weihong JI Zhibiao NAN State Key Laboratory of herbage Improvement and Grassland Agro-Ecosystems College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhouChina Manaaki Whenua-Landcare Research LincolnNew Zealand School of Natural Sciences Massey University(Albany Campus)AucklandNew Zealand Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina Qinghai Haibei National Field Research Station of Alpine Grassland Ecosystem Northwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina Institute of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijingChina

Globally,grassland degradation is an acute ecological *** alpine grassland on the Tibetan Plateau,increased densities of various small mammals in degraded grassland are assumed to intensify the degradation process and these mammals are subject to lethal ***,whether the negative impact of small mammals is solely a result of population size or also a result of activity and behavior has not been *** this study,we use plateau pika as a model to compare population size,core area of colony,and the number of burrow entrances and latrines between lightly and severely degraded *** test whether the alleged contribution of pika to grassland degradation is a result of increased population size or increased burrowing activities of individuals in response to lower food *** found that grassland degradation resulted in lower plant species richness,plant height,and ***,the overall population size of pika was not significantly affected by location in lightly and severely degraded ***,pika core areas in severely grassland degradation were significantly larger and had significantly higher densities of burrows and *** study provides convincing evidence that habitat-induced changes in the behavior of small,burrowing mammals,such as pika,can exacerbate grassland *** finding has significant implications for managing small mammals and restoring degraded grassland ecosystems.

关键词： burrowing behavior grassland degradation plateau pika population size small mammals

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Coexistence of adeno-associated virus 2 with adenovirus 18 or herpesvirus may be associated with severe lingual papillomatosis in an immunocompromised individual

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Virologica Sinica 2024年第4期39卷 705-707页

作者： Jie-Mei Yu Ze-Yin Liang Yuan-Hui Fu Xiang-Lei Peng Yan-Peng Zheng Yu-Jun Dong jin-sheng he College of Life Sciences and Bioengineering Beijing Jiaotong UniversityBeijing100044China Department of hematology Peking University First HospitalBeijing100034China

Dear Editor,Patients undergoing allogeneic hematopoietic stem cell transplantation(HSCT)often experience a significant reduction in immune function due to factors such as severe lymphopenia,immunosuppressive treatment,and the development of graft-versus-host disease,rendering them more susceptible to severe infections(Sahin et al.,2016).Traditional diagnostic approaches are limited in sensitivity,speed,and assay targets,thus failing short of meeting the diagnostic demands(Qu et al.,2022).However,next-generation sequencing(NGS)has greatly improved the accuracy and efficiency of diagnosing various diseases(Schuler et al.,2022),and has been widely utilized for pathogen detection in samples from HSCT patients(Armstrong et al.,2019;Peng et al.,2021).In this study,we employed viral metagenomics analysis using high-throughput sequencing on fecal and tissue samples from a patient with HSCT experiencing severe lingual papillomatosis.

关键词： al. papilloma rendering

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Lowered water table causes species substitution while nitrogen amendment causes species loss in alpine wetland microbial communities

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Pedosphere 2021年第6期31卷 912-922页

作者： Yuntao LI jin-sheng he Hao WANG Jizhong ZHOU Yunfeng YANG Haiyan CHU State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of Sciences71 East Beijing RoadNanjing 210008(China) University of Chinese Academy of Sciences Beijing 100049(China) Department of Ecology College of Urban and Environmental SciencesPeking UniversityBeijing 100871(China) State Key Laboratory of Grassland Agro-Ecosystems College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730000(China) State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084(China) Institute for Environmental Genomics Department of Microbiology and Plant Biology and School of Civil Engineering and Environmental SciencesUniversity of OklahomaNorman OK 73019(USA) Earth Science Division Lawrence Berkeley National LaboratoryBerkeley CA 94270(USA)

Alpine wetlands are hotspots of carbon(C)storage and methane emission,and they could be key contributors to global *** recent years,rapid warming has lowered the water table in alpine wetlands on the Tibetan Plateau,concurrent with intensified nitrogen(N)deposition via anthropogenic *** carried out a field experiment to investigate the ecological impacts of these two factors on soil bacterial and functional communities,which are essential drivers of greenhouse gas *** amendment alone decreased the phylogenetic alpha-diversity of bacterial communities which could be offset by lowered water *** contrast,microbial functional alpha-diversity,revealed by a high-throughput microarray,remained *** bacterial and functional beta-diversity responded to lowered water table,but only bacterial community responded to N *** alpha-Proteobacteria,beta-Proteobacteria,and Bacteroidetes were the major responsive bacterial lineages,and C degradation,methanogenesis,alkaline shock,and phosphorus oxidation were the major responsive functional *** analysis revealed that N amendment changed bacterial community structure mainly via species loss processes but did not affect bacterial functional communities,with soil pH and ammonium as the key factors influencing changes in bacterial community ***,lowered water table altered bacterial and functional communities through species substitution processes linked to soil pH and soil *** to our results,the response mechanisms of microbial communities to lowered water table and N amendment are fundamentally different in alpine wetlands.

关键词： alpha-diversity bacterial community beta-diversity microbial functional community N amendment water table lowering

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Responses of soil microbial communities and functions associated with organic carbon mineralization to nitrogen addition in a Tibetan grassland

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Pedosphere 2020年第2期30卷 214-225页

作者： Ruyi LUO Jiafa LUO Jianling FAN Deyan LIU jin-sheng he Nazia PERVEEN Weixin DING State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 10049China AgResearch Limited Ruakura Research CentreHamilton 3240New Zealand Department of Ecology College of Urban and Environmental SciencesKey Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China

Alpine grasslands with a high soil organic carbon(SOC)storage on the Tibetan Plateau are experiencing rapid climate warming and anthropogenic nitrogen(N)deposition;this is expected to substantially increase the soil N availability,which may impact carbon(C)***,little is known regarding how N enrichment influences soil microbial communities and functions relative to C cycling in this *** conducted a 4-year field experiment on an alpine grassland to evaluate the effects of four different rates of N addition(0,25,50,and 100 kg N ha^-1 year^-1)on the abundance and community structure(phospholipid fatty acids,PLFAs)of microbes,enzyme activities,and community level physiological profiles(CLPP)in *** found that N addition increased the microbial biomass C(MBC)and N(MBN),along with an increased abundance of bacterial PLFAs,especially Gram-negative bacterial PLFAs,with a decreasing ratio of Gram-positive to Gram-negative *** N addition also stimulated the growth of fungi,especially arbuscular mycorrhizal fungi,reducing the ratio of fungi to *** functional diversity and activity of enzymes involved in C cycling(β-1,4-glucosidase and phenol oxidase)and N cycling(β-1,4-N-acetyl-glucosaminidase and leucine aminopeptidase)increased after N addition,resulting in a loss of SOC.A meta-analysis showed that the soil C/N ratio was a key factor in the response of oxidase activity to N amendment,suggesting that the responses of soil microbial functions,which are linked to C turnover relative to N input,primarily depended upon the soil C/N ***,our findings highlight that N addition has a positive influence on microbial communities and their associated functions,which may reduce soil C storage in alpine grasslands under global change scenarios.

关键词： alpine grassland C cycling C turnover community level physiological profiles(CLPP) enzyme activity microbial community composition microbial function N input

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Carbon patterns and processes in East Asian ecosystems:multi-scale approaches

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Journal of Plant Ecology 2013年第5期6卷 323-324页

作者： jin-sheng he Hiroyuki Muraoka Yowhan Son jingyun Fang Department of Ecology College of Urban and Environmental SciencesPeking UniversityKey Laboratory of Earth Surface Processes of the Ministry of EducationBeijing 100871China Institute for Basin Ecosystem Studies Gifu University1-1 YanagidoGifu 501-1193Japan Division of Environmental Science and Ecological Engineering Korea UniversityAnam-dongSungbuk-kuSeoul 136-701Korea

It has been argued that scale is the central problem in ecology(Levin,1992).Studies on carbon cycles and global climate change,the current major themes in modern ecology,require the interfacing of phenomena that occur on different scales of space,time,and ecological *** several decades,tremendous efforts have been made to reveal the general patterns of,and the mechanisms for the global carbon ***,many uncertainties remain,particularly on local to regional *** reduce these uncertainties,regional collaborations across the board of nations are *** A3 Foresight Program“Quantifying and predicting terrestrial carbon sinks in East Asia:toward a network of climate change research”,lasting from 2007 to 2012 and supported jointly by the National Natural Science Foundation of China(NSFC),the National Research Foundation of Korea(NRF),and the Japan Society for the Promotion of Science(JSPS),aimed to build a collaborative research and education platform focusing on the carbon processes in terrestrial ecosystems in East Asia.

关键词： education NSFC jointly

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Relative effects of phylogeny,biological characters and environments on leaf traits in shrub biomes across central Inner Mongolia,China

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Journal of Plant Ecology 2013年第3期6卷 220-231页

作者： Chao Liu Xiangping Wang Xian Wu Shuang Dai jin-sheng he Weilun Yin The Key Laboratory of Silviculture and Conservation of the Ministry of Education and the National Engineering Laboratory for Forest Genetics and Tree BreedingBeijing Forestry UniversityBeijing 100083China Department of Ecology College of Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China

Aims Understanding the drivers for leaf traits is critical to improving our predictions on ecosystems'responses to global *** patterns of leaf traits are shaped by phylogenetic,biological and environmental factors ***,till now few studies have examined how these factors influenced leaf traits together,and how their effects differed at the within-and among-site *** We sampled leaf traits from a 1100 km shrub-biome transect across central Inner-Mongolia,including leaf mass per area(LMA),mass-based photosynthetic rate,nitrogen(N)and phosphorus(P)*** examined the effects of phylogenetic,biological(height and growth rate)and environmental(climate and soil)fac-tors on leaf traits with mixed-model analyses of *** partitioning method was used to separate the joint and independent effects of these three types of *** Findings(i)Climate and soil fertility(total or available nutrient concentra-tions)together explained 11.4-41.4%of among-site variations,with remarkable difference among traits.(i)height and height growth rate together explained 0.4--31.9%of trait variations(mostly among-site variations).Our results could only weakly support the ability of leaf traits as predictors for whole-plant growth.(ii)LMA was negatively related to height,which was consistent with the resource-use strategy hypothesis but incon-sistent with the hypotheses proposed for coexisting trees,suggest-ing that the LMA--height relationship is shaped by rather different mechanisms between the within-and among-communities lev-els.(iv)The variation partitioning analysis showed that,the rela-tionships between leaf traits and biological characters largely reflected the differences in both leaf traits and biological char-acters among species that occupying different *** relative importance of phylogenetic,biological and environmental fac-tors differed remarkably among leaf traits,between the within-and among-communi

关键词： leaf trait phylogeny height growth rate soil fertility climate

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Positive effects of tree species diversity on litterfall quantity and quality along a secondary successional chronosequence in a subtropical forest

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Journal of Plant Ecology 2017年第1期10卷 28-35页

作者： Yuanyuan Huang Yinlei Ma Ke Zhao Pascal A.Niklaus Bernhard Schmid jin-sheng he Department of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking University5 Yiheyuan RoadBeijing 100871China Department of Evolutionary Biology and Environmental Studies and Zürich-Basel Plant Science Center University of ZürichWinterthurerstrasse 190CH-8057 ZürichSwitzerland

Aims Litterfall,as an important link between aboveground and belowground processes,plays a key role in forest ***,we test for effects of tree species richness on litter production and litter quality in subtropical *** study further encompasses a factorial gradient of secondary succession that resulted from human *** that a large percentage of subtropical forests are in secondary successional stages,understanding the role of biodiversity on forest re-growth after disturbance appears *** From January 2009 to December 2014,we monitored forest litterfall in 27 Comparative Study Plots that spanned a gradient of tree species richness(3-20 species)and secondary successional ages(~20 to 120 years)in Gutianshan Natural Nature Reserve,Zhejiang Province,*** experiment is part of the biodiversity-ecosystem functioning research platform‘BEF-China’.Tree litterfall was collected in monthly intervals using litter *** were separated into leaf and non-leaf *** litter was further sorted into dominant and other *** level monthly leaf litter C and N contents were analysed through a full *** linear mixed-effects models were applied to test for effects of tree species richness and successional age on litter quantity and leaf litter C/*** Findings Litterfall increased with species richness among and within successional age and this effect was consistent across *** older stands had higher litterfall and this effect was related to increased tree species ***,species richness did not change the intra-and inter-annual temporal stability of *** tree species richness increased leaf litter quality(decreased C/N),while successional age had no *** study indicates that more diverse forest stands produce more leaf litter and that this litter has higher N concentrations,which could promote forest growth through accelerated nutrient re-cycling.

关键词： species richness BEF-China litterfall leaf litter C/N subtropical forest secondary succession structural equation models

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Soil respiration is driven by fine root biomass along a forest chronosequence in subtropical China

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Journal of Plant Ecology 2017年第1期10卷 36-46页

作者： Chao Wang Yinlei Ma Stefan Trogisch Yuanyuan Huang Yan Geng Michael Scherer-Lorenzen jin-sheng he Department of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking University5 Yiheyuan RoadBeijing 100871China Department for Geobotany Institute of Biology/Geobotany and Botanical GardenMartin-Luther-University Halle-WittenbergAm Kirchtor 1Halle(Saale)D-06108Germany German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5eLeipzig D-04103Germany Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences12 Zhongguancun South StreetBeijing 100081China Faculty of Biology/Geobotany University of Freiburg79104 FreiburgGermany

Aims Soil respiration(Rs)is a major process controlling soil carbon loss in forest ***,the underlying mechanisms leading to variation in Rs along forest successional gradients are not well *** this study,we investigated the effects of biotic and abiotic factors on Rs along a forest successional gradient in southeast *** We selected 16 plots stratified by forest age,ranging from 20 to 120 *** each plot,six shallow collars and six deep collars were permanently inserted into the *** and deep collars were used to measure Rs and heterotrophic respiration(Rh),*** soil respiration(Ra)was estimated as the difference between Rs and *** layer respiration(R_(L))was calculated by subtracting soil respiration measured in collars without leaf litter layer(R_(NL))from *** was measured every 2 months,and soil temperature(ST)and soil volumetric water content(SVWC)were recorded every hour for 19 *** calculated daily Rs using an exponential model dependent on *** Rs was summed to obtain cumulative annual Rs *** equation modelling(SEM)was applied to identify the drivers of Rs during forest *** Findings Rs showed significant differences among three successive stages,and it was the highest in the young *** was higher in the young stage than in the medium *** annual Rs and Ra peaked in the young and old stages,*** annual Rh and respiration measured from soil organic matter(R_(SOM))decreased,whereas R_(L)increased with forest *** SEM revealed that cumulative annual Rs was influenced by fine root biomass and *** results indicated that the dominant force regulating Rs on a seasonal scale is ST;however,on a successional scale,belowground carbon emerges as the dominant influential factor.

关键词： forest succession soil respiration fine root biomass soil temperature

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Effect of clear-cutting silviculture on soil respiration in a subtropical forest of China

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Journal of Plant Ecology 2013年第5期6卷 335-348页

作者： Yinlei Ma Yan Geng Yuanyuan Huang Yue Shi Pascal A.Niklaus Bernhard Schmid jin-sheng he Department of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China Institute of Evolutionary Biology and Environmental Studies University of ZurichWinterthurerstrasse 190CH-8057 ZurichSwitzerland Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXining 810008China

Aims Clear-cutting is a common forest management practice,especially in subtropical ***,the potential ecological consequences of clear-cutting remain *** particular,the effect of clear-cutting on soil processes,such as the carbon cycle,has not been quantified in subtropical ***,we investigated the response of soil respiration(Rs)to clear-cutting during a 12-month period in a subtropical forest in eastern *** We randomly selected four clear-cut(CC)plots and four corresponding undisturbed forest(UF)*** of Rs were made at monthly time points and were combined with continuous climatic measurements in both CC and *** Rs was estimated by interpolating data with an exponential model dependent on soil *** Rs was cumulated to annual Rs *** Findings In the first year after clear-cutting,annual estimates of Rs in CC(508±23g C m^(−2) yr^(−1))showed no significant difference to UF plots(480±12g C m^(−2) yr^(−1)).During the summer,soil temperatures were usually higher,whereas the soil volumetric water content was lower in CC than in UF *** long-term effects of clear-cutting on Rs are not significant,although there might be effects during the first several months after *** with previous work,this pattern was more pronounced in our subtropical forest than in the temperate and boreal forests that have been studied by *** aboveground residuals off-site after clear-cutting,our results indicate that the stimulation of increasing root debris,as well as environmental changes,will not lead to a significant increase in *** addition,long-term Rs will not show a significant decrease from the termination of root respiration,and this observation might be because of the influence of fast-growing vegetation after clear-cutting in situ.

关键词： clear-cutting subtropical forest soil respiration soil temperature

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Grassland Science in a New Era

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Fundamental Research 2023年第2期3卷 149-150页

作者： Guiling Zhao Lingli Liu Zeng-Yu Wang Zhenong jin jin-sheng he Division of Environment and Ecology Department of Life SciencesNational Natural Science Foundation of ChinaBeijing 100085China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China College of Grassland Science Qingdao Agricultural UniversityQingdao 266109China Department of Bioproducts and Biosystems Engineering University of MinnesotaMN 55455United States State Key Laboratory of herbage Improvement and Grassland Agro-Ecosystems and College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730000China Institute of Ecology College of Urban and Environmental SciencesPeking UniversityBeijing 100871China

Grasslands are one of the major biomes on Earth,covering approximately 25%of the terrestrial *** history is deeply intertwined with grassland biomes,where we,as a natural species,first walked upright 2 million years ***,grassland ecosystems continue to play an important role in people's livelihoods by producing meat and dairy products,providing habitats for biodiversity,and delivering essential ecosystem services such as climate regulation and cultural heritage.

关键词： grassland planet habitat

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