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Host plant traits play a crucial role in shaping the composition of epiphytic microbiota in the arid desert,Northwest China

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Journal of Arid Land 2024年第5期16卷 699-724页

作者： ZHANG Jun ZHANG Yuanming ZHANG Qi State Key Laboratory of desert and Oasis Ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China xinjiang Key Laboratory of Biodiversity Conservation and Application in Arid Lands Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China xinjiang Field Scientific observation research station of Tianshan Wild Fruit Forest ecosystem Yili Botanical GardenXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China College of Life Sciences Shihezi UniversityShihezi 832003China

Phyllosphere microorganisms are a crucial component of environmental microorganisms,highly influenced by host characteristics,and play a significant role in plant health and ***,the impact of host characteristics on shaping phyllosphere microbial communities of plants with different life forms remains *** high-throughput sequencing technology,this study analyzed the diversity and community composition of phyllosphere epiphytic microorganisms(e.g.,bacteria and fungi)of various plant life forms in the hinterland of the Gurbantunggut desert,Northwest *** annotation of prokaryotic taxa(FAPROTAX)and fungi function guild(FUNGuild)were employed to assess the ecological functions of microorganisms and to investigate the role of stochastic and deterministic processes in shaping phyllosphere microbial *** showed a diverse array of phyllosphere epiphytic microorganisms in the desert plants,with Proteobacteria,Cyanobacteria,and Actinobacteriota dominating bacterial community,while Ascomycota and Basidiomycota were prevalent in fungal *** across different plant life forms highlighted distinct microbial communities,indicating strong filtering effects by plant *** prediction identified intracellular parasites(accounting for 27.44%of bacterial community abundance),chemoheterotrophy(10.12%),and phototrophy(17.41%)as the main functions of epiphytic bacteria on leaves of different life form *** prediction indicated that phyllosphere epiphytic fungi primarily served as Saprotrophs(81.77%),Pathotrophs(17.41%),and Symbiotrophs(0.82%).Co-occurrence network analysis demonstrated a predominance of positive correlations among different microbial ***-Crick dissimilarity index analysis revealed that deterministic processes predominantly influenced phyllosphere bacterial and fungal community *** partitioning analysis and random forest modeling suggested that pla

关键词： phyllosphere epiphytic bacteria phyllosphere epiphytic fungi community structure community diversity functional diversity plant life form plant functional traits

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Characteristics and drivers of the soil multifunctionality under different land use and land cover types in the drylands of China

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Regional Sustainability 2024年第3期5卷 99-110页

作者： SONG Boyi ZHANG Shihang LU Yongxing GUO Hao GUO Xing WANG Mingming ZHANG Yuanming ZHOU Xiaobing ZHUANG Weiwei College of Life Sciences Xinjiang Normal UniversityUrumqi830054China State Key Laboratory of desert and Oasis Ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi830011China xinjiang Key Laboratory of Biodiversity Conservation and Application in Arid Lands Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi830011China xinjiang Field Scientific observation research station of Tianshan Wild Fruit Forest ecosystem Ili Botanical GardenXinjiang Institute of Ecology and GeographyChinese Academy of SciencesIli844900China University of Chinese Academy of Sciences Beijing100049China

The drylands of China cover approximately 6.6×106 km2 and are home to approximately 5.8×10^(8)people,providing important ecosystem services for human survival and ***,dryland ecosystems are extremely fragile and sensitive to external environmental *** use and land cover(LULC)changes significantly impact soil structure and function,thus affecting the soil multifunctionality(SMF).However,the effect of LULC changes on the SMF in the drylands of China has rarely been *** this study,we investigated the characteristics of the SMF changes based on soil data in the 1980s from the national Tibetan Plateau Data *** explored the drivers of the SMF changes under different LULC types(including forest,grassland,shrubland,and desert)and used structural equation modeling to explore the main driver of the SMF *** results showed that the SMF under the four LULC types decreased in the following descending order:forest,grassland,shrubland,and *** main driver of the SMF changes under different LULC types was mean annual temperature(MAT).In addition to MAT,pH in forest,soil moisture(SM)and soil biodiversity index in grassland,SM in shrubland,and aridity index in desert are crucial factors for the SMF ***,the SMF in the drylands of China is regulated mainly by MAT and pH,and comprehensive assessments of the SMF in drylands need to be performed regarding LULC *** results are beneficial for evaluating the SMF among different LULC types and predicting the SMF under global climate change.

关键词： Soil multifunctionality(SMF) Land use and land cover(LULC)changes Structural equation modeling(SEM) Climate change Dryland ecosystems

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Characteristics of Wind Erosion and Deposition in Oasis-desert Ecotone in Southern Margin of Tarim Basin,China

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Chinese Geographical Science 2014年第6期24卷 658-673页

作者： MAO Donglei LEI Jiaqiang ZENG Fanjiang RAHMUTULLA Zaynulla WANG Cui ZHOU Jie xinjiang Institute of Ecology and Geography Chinese Academy of Sciences University of Chinese Academy of Sciences College of Geographical Science and Tourism Xinjiang Normal University cele national station of observation and research for desert-grassland ecosystem in xinjiang

The oasis-desert ecotone is a fragile ecological zone that is affected both by oasis and desert conditions. To understand the impact of the differences in wind power, and the influence of wind erosion and deposition on the ecotone, meteorological data and con- temporaneous wind erosion and deposition data were collected on the southern margin of Tarim Basin with serious sand-blown hazards. The wind velocity, average wind velocity, sand drift potential （DP）, resultant sand drift potential （RDP）, and sand transportation rate decrease significantly and successively across four landscape types with increasing vegetation coverage （VC）. Flat surfaces and areas of shifting sandy ground experience intense wind erosion with fast movement of mobile sand dunes; semi-fixed sand areas experience ex- tensive wind deposition but only slight wind erosion; and fixed sand areas experience only slight wind erosion and deposition. Volume of wind erosion on bare newly reclaimed farmland is up to 6.96 times that of bare shifting sandy ground. Wind erosion volume per unit area and VC follow an exponential function relationship in natural conditions, while wind deposition volume per unit area does not conform to any functions which has close relationship with vary topography and arrangement patterns of vegetation besides for VC. The results indicate that the volume of wind erosion has a close correlation with VC, and different types and distribution patterns of topog- raphy and vegetation also profoundly influence the wind deposition volume in the field, and underground water tables in different land- scape types control the plant community distribution. Keywords： wind erosion; wind deposition; oasis-desert ecotone; vegetation coverage （VC）; topography; cele County

关键词： wind erosion wind deposition oasis-desert ecotone vegetation coverage (VC) topography cele County

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Relations between soil heterogeneity and common reed(Phragmites australis *** Steud.) colonization in the Keriya River Basin,xinjiang of China

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Journal of Arid Land 2014年第6期6卷 753-761页

作者： Lu GONG ChangJun LI Tashpolat TIYIP College of Resources and Environment Science Xinjiang University Key Laboratory of Oasis Ecology Ministry of Education xinjiang Institute of Ecology and Geography Chinese Academy of Sciences cele national station of observation & research for desert-grassland ecosystem in xinjiang

How common reed （Phragmites australis Trin. ex Steud.） colonization correlates to soil heterogeneity and environmental determinants remains unclear in arid areas. We conducted a field investigation and soil sampling in 100 plots along Keriya River Basin to uncover the relationship between common reed and heterogeneous soils. Reed colonization variables and its soil properties were measured and recorded for the analysis of their relationship using Pearson correlation and redundancy analysis methods. The comparison results of common reed characteris- tics among 100 plots showed that common reeds performed strong tolerance and ecophysiological plasticity to edaphic stresses. Common reed colonization was tightly connected to soil heterogeneity according to the correla- tion analysis between its colonization characteristics and soil properties. Common reed colonization got feedbacks on soil properties as well, including the increase of soil organic matter and the alleviation of salt uplifting. The main limiting environmental determinant of common reed colonization was soil salt, followed by pH and soil water content.

关键词： soil heterogeneity plant colonization common reed plasticity determinant

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Characteristics of Meteorological Factors over Different Landscape Types During Dust Storm Events in cele,xinjiang,China

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Journal of Meteorological research 2014年第4期28卷 576-591页

作者：毛东雷雷加强李生宇曾凡江王翠周杰 xinjiang Institute of Ecology and Geography Chinese Academy of Sciences University of Chinese Academy of Sciences College of Geographical Sciences and Tourism Xinjiang Normal University cele national station of observation and research for desert-grassland ecosystem in xinjiang

Landscape characteristics influence meteorological factors, thus affect the occurrence and nature of dust storm events. The present study investigates the spatiotemporal characteristics of six meteorological factors （wind velocity, wind direction, air temperature, relative humidity （RH）, photo synthetically active radiation （PAR）, and solar radiation） over different landscape types （shifting-sand frontier, semi-fixed sandy land, fixed sandy land, and the inner region of an oasis） before and after dust storms during four typical dust storm events in an oasis-desert ecotone in cele, xinjiang, China. The results show that the average wind velocity decreased significantly from the shifting-sand frontier to the inner oasis, which was mainly attributable to the vegetation coverage. Before the dust storm events, there were obvious differences in air temperature and RH either in the horizontal or vertical direction over the different landscape types. However, these factors were very similar during and following the dust storm events. PAR and solar radiation were significantly reduced during the dust storm events and the subsequent sand-blowing and floating-dust conditions. This effect was much stronger than during similar weather conditions without dust storm events such as sand-blowing and overcast and/or rainy days. Additionally, the variation in the meteorological factors among the different landscapes was also affected by the prevailing wind direction during the dust storm events. However, the landscape type slightly changed the prevailing wind direction, with the greatest dispersion distribution of wind direction in the inner oasis. The findings of this study are helpful for understanding the function of landscape types in the occurrence of dust storms, as well as for providing a theoretical basis for prevention of dust storms.

关键词： dust storms weather meteorological factors changing characteristics cele

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Root characteristics of Alhagi sparsifolia seedlings in response to water supplement in an arid region,northwestern China

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Journal of Arid Land 2013年第4期5卷 542-551页

作者： DongWei GUI FanJiang ZENG Zhen LIU Bo ZHANG State Key Laboratory of desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences cele national station of observation & research for desert-grassland ecosystem in xinjiang Key Laboratory of Biogeography and Bioresource in Arid Land Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences

The effect of variation in water supply on woody seedling growth in arid environments remain poorly *** subshrub Alhagi sparsifolia Shap.（Leguminosae）,distributed in the southern fringe of the Taklimakan desert,xinjiang,northwestern China,has evolved deep roots and is exclusively dependent on groundwater,and performs a crucial role for the local ecological *** the cele oasis,we studied the responses of *** seedling roots to water supplement at 10 and 14 weeks under three irrigation treatments （none water supply of 0 m3/m2 （NW）,middle water supply of 0.1 m3/m2 （MW）,and high water supply of 0.2 m3/m2 （HW））.The results showed that the variations of soil water content （SWC） significantly influenced the root growth of *** *** leaf area,basal diameter and crown diameter were significantly higher in the HW treatment than in the other *** biomass,root surface area （RSA）,root depth and relative growth rate （RGR） of *** roots were all significantly higher in the NW treatment than in the HW and MW treatments at 10 ***,these root parameters were significantly lower in the NW treatment than in the other treatments at 14 *** SWC continued to decline as the experiment went on （until less than 8％ gravimetric SWC）,the seedlings still showed drought tolerance through morphological and physiological responses,but root growth suffered serious water stress compared to better water supply *** to our study,keeping a minimum gravimetric SWC of 8％ might be important for the growth and establishment of *** during the early growth *** results will not only enrich our knowledge of the responses of woody seedlings to various water availabilities,but also provide a new insight to successfully establish and manage *** in arid environments,further supporting the sustainable development of oases.

关键词： arid environment Alhagi sparsifolia roots irrigation treatments oasis

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退化草甸植物根系生产力对不同恢复措施的响应

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Journal of Plant Ecology 2024年第3期17卷 141-152页

作者： Meng Cui Hong-Hui Wu Chang-Qing Jing Tao Zhang Shi-Ying Zhao Ying-Zhi Gao Key Laboratory of grassland Resources and Ecology of xinjiang Uygur Autonomous Region College of Grassland ScienceXinjiang Agricultural UniversityUrumqi 830052China State Key Laboratory of Vegetation and Environmental Change Institute of Botanythe Chinese Academy of SciencesBeijing 100093China State Key Laboratory of Effcient Utilization of Arid and Semi-arid Arable Land in Northern China Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Vegetation Ecology of the Ministry of Education Jilin Songnen Grassland Ecosystem National Observation and Research StationNortheast Normal UniversityChangchun 130024China Songyuan Agriculture and Rural Bureau Songyuan 138000China

根系生产力及其动态变化对评价退化草地的恢复起着重要作用。然而,目前尚不清楚根系如何响应不同恢复措施。为了探究根系对不同恢复措施的响应,本研究于2013–2014年在退化草甸开展了田间试验。试验处理包括:自由放牧(FG)、不翻耕(NP)... 详细信息

根系生产力及其动态变化对评价退化草地的恢复起着重要作用。然而,目前尚不清楚根系如何响应不同恢复措施。为了探究根系对不同恢复措施的响应,本研究于2013–2014年在退化草甸开展了田间试验。试验处理包括:自由放牧(FG)、不翻耕(NP)、仅翻耕(OP)、翻耕+施肥(PF)、翻耕+覆盖(PM)和翻耕+施肥+覆盖(PFM)。研究结果表明,根系的季节动态为单峰模式,主要受降水的影响,但不受恢复措施的影响。不同恢复措施对根系生产力的影响取决于降水量。在2013年,与FG相比,PFM通过增加ANPP、土壤含水量和根系数量显著提高根系生产力达242.34%(0–10 cm)和90.8%(10–20 cm);2014年不同恢复措施对根系生产力的影响不显著。根系周转在不同恢复措施间无显著变化,其范围为0.47–0.78 yr−1。这主要是由于在不同样地中优势物种均是一年生物种虎尾草(Chloris virgata),其根系周转变化相对较小。此外,PFM还通过改善土壤条件提高了根系寿命和存活率。上述结果表明,组合恢复措施是促进松嫩草甸地下根系恢复的有效途径。

关键词：恢复措施退化草甸根系生产力根系周转根系寿命

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Responses of root growth of Alhagi sparsifolia Shap. (Fabaceae) to different simulated groundwater depths in the southern fringe of the Taklimakan desert, China

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Journal of Arid Land 2013年第2期5卷 220-232页

作者： FanJiang ZENG Cong SONG HaiFeng GUO Bo LIU WeiCheng LUO DongWei GUI Stefan ARNDT DaLi GUO State Key Laboratory of desert and Oasis Ecology Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences cele national station of observation and research for desert-grassland ecosystem University of Chinese Academy of Sciences School of Forest and ecosystem Science University of Melbourne Institute of Geographic Sciences and Natural Resources research Chinese Academy of Sciences

Alhagi sparsifolia Shap. （Fabaceae） is a spiny, perennial herb. The species grows in the salinized, arid regions in North China. This study investigated the response characteristics of the root growth and the dis- tribution of one-year-old A. sparsifolia seedlings to different groundwater depths in controlled plots. The eco- logical adaptability of the root systems of A. sparsifolia seedlings was examined using the artificial digging method. Results showed that：（1） A. sparsifolia seedlings adapted to an increase in groundwater depth mainly through increasing the penetration depth and growth rate of vertical roots. The vertical roots grew rapidly when soil moisture content reached 3%-9%, but slowly when soil moisture content was 13%-20%. The vertical roots stopped growing when soil moisture content reached 30% （the critical soil moisture point）. （2） The morphological plasticity of roots is an important strategy used by A. sparsifolia seedlings to obtain water and adapt to dry soil conditions. When the groundwater table was shallow, horizontal roots quickly expanded and tillering increased in order to compete for light resources, whereas when the groundwater table was deeper, vertical roots developed quickly to exploit space in the deeper soil layers. （3） The decrease in groundwater depth was probably respon- sible for the root distribution in the shallow soil layers. Root biomass and surface area both decreased with soil depth. One strategy of A. sparsifolia seedlings in dealing with the increase in groundwater depth is to increase root biomass in the deep soil layers. The relationship between the root growth/distribution of A. sparsifolia and the depth of groundwater table can be used as guidance for harvesting A. sparsifolia biomass and managing water resources for forage grasses. It is also of ecological significance as it reveals how desert plants adapt to arid environments.

关键词： Alhagi sparsifolia Shap. simulated groundwater depth root system growth and distribution ecological adaptability root morphological plasticity

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Effects of parasitic plant Cistanche deserticola on chlorophyll a fluorescence and nutrient accumulation of host plant Haloxylon ammodendron in the Taklimakan desert

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Journal of Arid Land 2012年第3期4卷 342-348页

作者： Li LI XinWen XU YongQiang SUN WeiHAN PengFei TU cele national station of observation & research for desert-grassland ecosystem in xinjiang Cele 848300 China xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Health ScienceCenter Beijing 100191 China

The parasitic plant Cistanche deserticola attaches to Haloxylon ammodendron, a perennial shrub with high tolerance to salinity and drought. However, little was known about the parasite-host relation between the two species. Effects of the parasite on chlorophyll a fluorescence and nutrient accumulation in the host plant （H. am- modendron） were investigated in the Taklimakan desert. Some photosynthetic parameters of both host and non-host H. ammodendron plants were measured by in vivo chlorophyll a fluorescence technology in the field. The assimilating branches of host and non-host plants were collected and nutrient and inorganic ion contents were analyzed. The results from field experiments showed that the infection of C. deserticola reduced the non-photochemical quenching of the variable chlorophyll fluorescence （NPQ） and the potential maximum quantum yield for primary photochemistry （Fv/Fm） of the host. Compared with non-host plants, the host H. ammodendron had low nutrient, low inorganic ion contents （Na~ and K~） and low K~/Na~ ratios in the assimilating branches. It suggested that C. deserticola infection reduced the nutrient acquisition and caused damage to the photoprotection through thermal dissipation of the energy of the photosystem II in the host, resulting in a decrease in the tolerance to salinity and high radiation. It was concluded that the attachment of the parasite plant （C. deserticola） had negative effects on the growth of its host.

关键词： parasite-host relation nutrient acquisition inorganic ion content non-photochemical quenching the Taklimakan desert

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Re-evaluating the vertical mass-flux profiles of aeolian sediment at the southern fringe of the Taklimakan desert, China

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Journal of Arid Land 2015年第6期7卷 765-777页

作者： XUE Jie LEI Jiaqiang LI Shengyu GUI Dongwei MAO Donglei ZHOU Jie State Key Laboratory of desert and Oasis Ecology Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences cele national station of observation and research for desert-grassland ecosystem Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences Key Laboratory of Biogeography and Bioresource in Arid Land Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences University of Chinese Academy of Sciences

Reliable estimation of the mass-flux profiles of aeolian sediment is essential for predicting sediment transport rates accurately and designing measures to cope with wind-erosion. Vertical mass-flux profiles from seventeen wind-erosion events were re-evaluated using five typical models based on observed data obtained from a smooth bare field at the southern fringe of the Taklimakan desert, China. The results showed that the exponential-function model and the logarithmic-function model exhibited the poorest fit between observed and predicted mass-flux profiles. The power-function model and the modified power-function model improved the fit to field data to an equivalent extent, while the five-parameter combined-function model with a scale constant（σ） of 0.00001 m（different from the σ value proposed by Fryear, which represented the height above which 50% of the total mass flux occurred） was verified as the best for describing the vertical aeolian sediment mass-flux profiles using goodness of fit（R2） and the Akaike Information Criterion（AIC） values to evaluate model performance. According to relationships among model parameters, the modified power model played a prominent explanatory role in describing the vertical profiles of the observed data, whereas the exponential model played a coordinating role. In addition, it was found that the vertical profiles could not be extrapolated using the five selected models or easily estimated using an efficient model without field observations by a near-surface sampler at 0 to 0.05 m.

关键词： vertical profile mass flux aeolian sediment wind erosion Taklimakan desert

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