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Potential distribution of Haloxylon ammodendron in Central Asia under climate change

Journal of Arid Land 2024年第9期16卷 1255-1269页

作者： CHEN Zhuo SHAO Minghao HU Zihao GAO Xin lei jiaqiang Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China National Engineering Technology Research Center for Desert-Oasis Ecological Construction Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China University of Emergency Management Beijing 101601China

Understanding the spatial distribution of plant species and their dynamic changes in arid areas is crucial for addressing the challenges posed by climate *** ammodendron shelterbelts are essential for the protection of plant resources and the control of desertification in Central *** far,the potential suitable habitats of *** in Central Asia are still uncertain in the future under global climate change *** study utilised the maximum entropy(MaxEnt)model to combine the current distribution data of *** with its growth-related data to analyze the potential distribution pattern of *** across Central *** results show that there are suitable habitats of *** in the Aralkum Desert,northern slopes of the Tianshan Mountains,and the upstream of the Tarim River and western edge of the Taklimakan Desert in the Tarim Basin under the current climate *** period from 2021 to 2040 is projected to undergo significant changes in the suitable habitat area of *** in Central Asia,with a projected 15.0% decrease in the unsuitable habitat *** areas farther from the ocean,such as the Caspian Sea and Aralkum Desert,will continue to experience a decrease in the suitable habitats of *** exhibiting frequent fluctuations in the habitat suitability levels are primarily found along the axis stretching from Astana to Kazakhskiy Melkosopochnik in *** regions can transition into suitable habitats under varying climate conditions,requiring the implementation of appropriate human intervention measures to prevent *** climate conditions are expected to cause an eastward shift in the geometric centre of the potential suitable habitats of ***,with the extent of this shift amplifying alongside more greenhouse gas *** study can provide theoretical support for the spatial configuration of *** shelterbelts and desertification co

关键词： Haloxylon ammodendron potential suitable habitats climate change desertification maximum entropy(MaxEnt)model Central Asia Aralkum Desert

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Ecological problems and ecological restoration zoning of the Aral Sea

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Journal of Arid Land 2024年第3期16卷 315-330页

作者： BAO Anming YU Tao XU Wenqiang lei jiaqiang JIAPAER Guli CHEN Xi Tojibaev KOMILJON Shomurodov KHABIBULLO Xabibullaev B SAGIDULLAEVICH Idirisov KAMALATDIN State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Key Laboratory of GIS&RS Application Xinjiang Uygur Autonomous RegionUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China CAS Research Center for Ecology and Environment of Central Asia Urumqi 830011China Institute of Botany of the Academy of Sciences of the Republic of Uzbekistan Tashkent 100125Uzbekistan International Innovation Center for Aral Sea Basin under the President of the Republic of Uzbekistan Nukus 230100Uzbekistan

The Aral Sea was the fourth largest lake in the world but it has shrunk dramatically as a result of irrational human activities, triggering the "Aral Sea ecological crisis". The ecological problems of the Aral Sea have attracted widespread attention, and the alleviation of the Aral Sea ecological crisis has reached a consensus among the five Central Asian countries(Kazakhstan, Uzbekistan, Tajikistan, Kyrgyzstan, and Turkmenistan). In the past decades, many ecological management measures have been implemented for the ecological restoration of the Aral Sea. However, due to the lack of regional planning and zoning, the results are not ideal. In this study, we mapped the ecological zoning of the Aral Sea from the perspective of ecological restoration based on soil type, soil salinity, surface water, groundwater table, Normalized Difference Vegetation Index(NDVI), land cover, and aerosol optical depth(AOD) data. Soil salinization and salt dust are the most prominent ecological problems in the Aral Sea. We divided the Aral Sea into 7 first-level ecological restoration subregions(North Aral Sea catchment area in the downstream of the Syr Darya River(Subregion Ⅰ);artificial flood overflow area in the downstream of the Aral Sea(Subregion Ⅱ);physical/chemical remediation area of the salt dust source area in the eastern part of the South Aral Sea(Subregion Ⅲ);physical/chemical remediation area of severe salinization in the central part of the South Aral Sea(Subregion Ⅳ);existing water surface and potential restoration area of the South Aral Sea(Subregion Ⅴ);Aral Sea vegetation natural recovery area(Subregion Ⅵ);and vegetation planting area with slight salinization in the South Aral Sea(Subregion Ⅶ)) and 14 second-level ecological restoration subregions according to the ecological zoning principles. Implementable measures are proposed for each ecological restoration subregion. For Subregion Ⅰ and Subregion Ⅱ with lower elevations, artificial flooding should be carried out to re

关键词： ecological restoration zoning salt and dust storms soil salinization ecological crisis Aral Sea Central Asia

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风蚀沙尘对新疆绿洲城市大气环境的影响研究

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环境科学学报 2024年第1期44卷 102-111页

作者：薛一波张小啸任岗雷加强李生宇中国科学院新疆生态与地理研究所国家荒漠-绿洲生态建设工程技术研究中心乌鲁木齐830011 中国科学院大学北京101408 石河子气象局石河子832000

通过分析2020年新疆16个绿洲城市的环境监测记录和气象观测数据,研究沙尘天气频率、大气降尘强度和PM_(10)(空气动力直径≤10μm的颗粒物)浓度的变化特征以及风蚀沙尘对绿洲城市大气环境的影响.统计分析结果显示:2020年南疆沙尘天气日数... 详细信息

通过分析2020年新疆16个绿洲城市的环境监测记录和气象观测数据,研究沙尘天气频率、大气降尘强度和PM_(10)(空气动力直径≤10μm的颗粒物)浓度的变化特征以及风蚀沙尘对绿洲城市大气环境的影响.统计分析结果显示:2020年南疆沙尘天气日数为180 d,是北疆和东疆沙尘天气总日数的4倍以上;新疆地区春夏两季浮尘天气日数占全年沙尘天气总日数的50%以上;北疆、东疆和南疆城市沙尘天气PM_(10)浓度较非沙尘天气分别增加14%~253%、20%~422%和24%~804%.风蚀沙尘造成75%的绿洲城市年均PM_(10)浓度高于国家环境空气质量标准的二级浓度限制,且呈现出由北向南递增的变化趋势;南疆城市风蚀沙尘中PM_(10)贡献率高达67%,其次是东疆和北疆城市,分别为22%和11%.新疆绿洲城市降尘强度和PM_(10)浓度呈显著正相关,南疆最大月均降尘强度为143 t·km^(-2),是北疆和东疆的14倍和8倍;风蚀沙尘造成南疆城市空气质量污染比重均在80%以上,大气能见度显著低于北疆和东疆.总之,风蚀沙尘对新疆绿洲城市大气环境的影响显著,其影响程度与沙尘天气发生频率和地处沙源区密切相关.

关键词：新疆风蚀沙尘大气环境时空变化颗粒物

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An over review of desertification in Xinjiang,Northwest China

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Journal of Arid Land 2022年第11期14卷 1181-1195页

作者： YU Xiang lei jiaqiang GAO Xin State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China

Desertification research in arid and semi-arid regions has always been actively *** China,the problem of desertification in Xinjiang has also received extensive *** to its unique geography,many scholars have conducted corresponding research on the desertification status of *** this paper,we comprehensively reviewed desertification in Xinjiang,and compared the underlying mechanisms of desertification and the status of desertification conditions after the implementation of ecological control *** a larger scale,desertification in Xinjiang can be divided into soil salinization inside oases and sandy desertification on the edges of *** activities are considered the main cause of desertification,but natural factors also contribute to varying *** on the mechanisms of desertification has effectively curbed the development of desertification,but unreasonable use of land resources accelerates the risk of *** desertification control,there are several key ***,desertification monitoring and the early warning of desertification expansion should be ***,monitoring and reversing soil salinization also play an important role in the interruption of desertification *** is very effective to control soil salinization through biological and chemical ***,the management of water resources is also essential,because unreasonable utilization of water resources is one of the main reasons for the expansion of desertification in *** to the unreasonable utilization of water resources,the lower reaches of the Tarim River are cut off,which leads to a series of vicious cycles,such as the deterioration of ecological environment on both sides of the river and the worsening of ***,in recent years,various desertification control projects implemented in Xinjiang according to the conditions of different regions have achieved remarkable *** future studies,resea

关键词： desertification soil salinization sandy desertification desertification control soil wind erosion human activities Tarim Basin

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Preliminary studies on the large-scale geomorphic patterns of the complex longitudinal sand ridge zone in the Taklimakan Desert

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Chinese Science Bulletin 2008年第S2期53卷 177-189页

作者： YUE Jian lei jiaqiang MU GuiJin Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China Graduate University of Chinese Academy of Sciences Beijing 100049China

Through analysis of satellite images from Google Earth, this article expounds the characteristics of large-scale geomorphic patterns of the complex longitudinal sand ridge zone in the Taklimakan Desert, and reduces the large-scale geomorphic patterns to six types: parallel pattern, "日"character-shaped and "乡" character-shaped pattern, comb-shaped pattern, fork-shaped pattern, toe-shaped pattern and miscellaneous pattern. And according to the large-scale geomorphic pattern type (or composition of pattern types) as well as some other factors, the article divides the complex longitudinal sand ridge zone into 55 subzones. Lastly, aiming at the genetic problems of the large-scale geomorphic patterns, the article suggests three connective types of the sand ridges in the complex longitudinal sand ridge zone, i.e., connecting or intersecting after natural elongation, connecting in a narrow place and connecting with the aid of intermediary.

关键词： Taklimakan Desert complex longitudinal sand ridges large-scale geomorphic pattern subzone Google Earth

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Effect of the W-beam central guardrails on wind-blown sand deposition on desert expressways in sandy regions

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Journal of Arid Land 2020年第1期12卷 154-165页

作者： WANG Cui LI Shengyu lei jiaqiang LI Zhinong CHEN Jie Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China College of Resource and Environment Sciences Xinjiang UniversityUrumqi 830046China Xinjiang Academy of Transportation Sciences Urumqi 830000China University of Chinese Academy of Sciences Beijing 100049China

Many desert expressways are affected by the deposition of the wind-blown sand,which might block the movement of vehicles or cause accidents.W-beam central guardrails,which are used to improve the safety of desert expressways,are thought to influence the deposition of the wind-blown sand,but this has yet not to be studied *** address this issue,we conducted a wind tunnel test to simulate and explore how the W-beam central guardrails affect the airflow,the wind-blown sand flux and the deposition of the wind-blown sand on desert expressways in sandy *** subgrade model is 3.5 cm high and 80.0 cm wide,with a bank slope ratio of 1:*** W-beam central guardrails model is 3.7 cm high,which included a 1.4-cm-high W-beam and a 2.3-cm-high stand *** wind velocity was measured by using pitot-static tubes placed at nine different heights(1,2,3,5,7,10,15,30 and 50 cm)above the floor of the *** vertical distribution of the wind-blown sand flux in the wind tunnel was measured by using the sand sampler,which was sectioned into 20 *** addition,we measured the wind-blown sand flux in the field at K50 of the Bachu-Shache desert expressway in the Taklimakan Desert on 11 May 2016,by using a customized 78-cm-high gradient sand sampler for the sand flux structure *** by the subgrade leads to the formation of two weak wind zones located at the foot of the windward slope and at the leeward slope of the subgrade,and the wind velocity on the leeward side weakens *** W-beam central guardrails decrease the leeward wind velocity,whereas the velocity increases through the bottom gaps and over the top of the W-beam central *** vertical distribution of the wind-blown sand flux measured by wind tunnel follows neither a power-law nor an exponential function when affected by either the subgrade or the W-beam central *** 0.0H and 0.5H(where H=3.5 cm,which is the height of the subgrade),the sand transport is less a

关键词： wind velocity field wind-blown sand flux W-beam central guardrails sand deposition desert expressway wind tunnel test Taklimakan Desert

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Ecological stability of Tarim Desert Highway shelterbelt

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Chinese Science Bulletin 2006年第A01期51卷 153-160页

作者： ZHOU Zhibin XU Xinwen lei jiaqiang LI Shengyu Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

The Tarim Desert Highway shelterbelt, located in hinterland of Taklimakan Desert, is irrigated by underground saline water, with three to thirty gram per litter mineral degrees. The sustain-ability and stability are affected by multifarious stress. The structural and functional characteristics of shelterbelt are studied to probe into correlation between environment and shelterbelt. On basis, decision analysis is applied to study ecological stability of the Tarim Desert Highway shelterbelt, to screen out limited factors, to establish general index system, and to evaluate the stability of the shelterbelt nowadays. Finally, the concept of ecological stability is utilized to manage the artificial ecosystem. The results show that the artificial ecosystem is relatively flimsy, whose stability can be increased by adjusting stand structure and improving the nutrient cycle.

关键词：生态稳定性塔克拉玛干沙漠塔里木沙漠沙漠公路防风林决策分析

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Stable oxygen-hydrogen isotopes reveal water use strategies of Tamarix taklamakanensis in the Taklimakan Desert, China

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Journal of Arid Land 2020年第1期12卷 115-129页

作者： DONG Zhengwu LI Shengyu ZHAO Ying lei jiaqiang WANG Yongdong LICongjuan Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China College of Resources and Environment Science Xinjiang UniversityUrumqi 830046China College of Life Science Xinjiang Normal UniversityUrumqi 830054China University of Chinese Academy of Sciences Beijing 100049China College of Resources and Environmental Engineering Ludong UniversityYantai 264025China

Tamarix taklamakanensis,a dominant species in the Taklimakan Desert of China,plays a crucial role in stabilizing sand dunes and maintaining regional ecosystem *** study aimed to determine the water use strategies of *** in the Taklimakan Desert under a falling groundwater *** typical *** nabkha habitats(sandy desert of Tazhong site,saline desert-alluvial plain of Qiemo site,desert-oasis ecotone of Qira site and desert-oasis ecotone of Aral site)were selected with different climate,soil,groundwater and plant cover *** isotope values of hydrogen and oxygen were measured for plant xylem water,soil water(soil depths within 0–500 cm),snowmelt water and groundwater in the different *** potential water sources for ***,defined as shallow,middle and deep soil water,as well as groundwater,were investigated using a Bayesian isotope mixing *** was found that groundwater in the Taklimakan Desert was not completely recharged by precipitation,but through the river runoff from snowmelt water in the nearby mountain *** surface soil water content was quickly depleted by strong evaporation,groundwater depth was relatively shallow and the height of *** nabkha was relatively low,thus *** primarily utilized the middle(23%±1%)and deep(31%±5%)soil water and groundwater(36%±2%)within the sandy desert *** mainly used the deep soil water(55%±4%)and a small amount of groundwater(25%±2%)within the saline desert-alluvial plain habitat,where the soil water content was relatively high and the groundwater depth was *** contrast,within the desert-oasis ecotone in the Qira and Aral sites,*** primarily utilized the deep soil water(35%±1%and 38%±2%,respectively)and may also use groundwater because the height of *** nabkha was relatively high in these habitats and the soil water content was relatively low,which is associated

关键词： Tamarix taklamakanensis water use strategies stable isotopes Bayesian isotope mixing model deep soil water groundwater 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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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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