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Surface pollen and modern vegetation in Southern Xinjiang,China

Science China Earth Sciences 2024年第2期67卷 510-530页

作者： Yun ZHANG Lixin CHEN Yaoyao XI zhaochen kong Xianguo QIAO State Key Laboratory of Black Soils Conservation and Utilization Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun130102China Institute of Botany Chinese Academy of SciencesBeijing100093China Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China University of Chinese Academy of Sciences Beijing100049China School of Geosciences and Resources China University of Geosciences(Beijing)Beijing100083China

The study of modern pollen,and vegetation can improve the accuracy of paleoenvironmental reconstruction based on fossil pollen data.A total of 188 pollen surface samples were collected from Southern Xinjiang(34°00’–43°00’N,74°00’–94°00’E)in China,with an elevation range of 888–4530 *** pollen and vegetation were studied in the northern region of the Kunlun Mountains and the southern region of the Tianshan *** results showed that the surface pollen assemblages on the southern slope of the Tianshan Mountains(3530–1124 m)were divided into three pollen zones,namely,montane steppe,montane desert steppe,and montane *** zones were dominated by Artemisia,Chenopodiaceae,and Ephedra *** surface pollen assemblages in the eastern Pamir Plateau(4530–1287 m)could be divided into alpine meadow,montane desert steppe,and montane desert zones,which were predominantly characterized by Artemisia,Chenopodiaceae,and Asteraceae ***,the Southern Tarim Basin(3548–888 m)comprised montane desert steppe and montane desert zones,which was dominated by Artemisia and Chenopodiaceae *** geographic distribution of the surface pollen sites obtained using ArcGIS,the R-value,and Pearson correlation analyses indicated that the over-represented Picea and Pinus pollen were of external origin and were transported by wind,water(rivers),and ice(glacier movement).Over-representation of Ephedra and Nitraria pollen was mainly distributed in the montane desert and desert steppe zones,*** from Chenopodiaceae and Artemisia were over-represented and broadly distributed across Southern *** pollen was concentrated in areas with walnut trees,strongly indicating the presence of local parent *** to the Hybrid Singleparticle Lagrangian Integrated Trajectory model,more Pinus pollen was transported to the Pamir region by external airflows during spring and summer,resulting in its higher surface pollen *** elucidating t

关键词： Surface pollen Vegetation Distribution Picea Southern Xinjiang

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Airborne pollen patterns and their relationship with meteorological factors in the Betula microphylla-dominated wetland of Ebinur Lake,Xinjiang,China

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Science China Earth Sciences 2021年第10期64卷 1746-1760页

作者： Lixin CHEN Yun ZHANG zhaochen kong State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China College of Earth Sciences Hebei GEO UniversityShijiazhuang 050031China

Airborne pollen is indicative of vegetation and climatic *** study investigates airborne pollen trapping in the Betula microphylla-dominated wetland of Ebinur Lake in Northwestern China from September 2012 to August 2015 using Pearson correlation analysis and the Hybrid Single-particle Lagrangian Integrated Trajectory *** temperatures and moderate precipitation during the flowering period facilitated an increase in birch pollen with more exotic spruce pollen carried from the Tianshan Mountains by airflows,leading to the highest arbor pollen concentrations from September 2012 to August *** pollen concentrations from September 2013 to August 2014 were possibly due to an increase in herbaceous pollen resulting from higher temperatures,lower precipitation and more exotic pollen from the desert of southwest Ebinur Lake and Central Asia in summer and *** September 2014 and August 2015,unfavorable climate conditions in summer and autumn decreased the pollen dispersal of xerophytes such as Artemisia and Chenopodiaceae,with little pollen transported from the Kazakh hilly area in late summer,resulting in the lowest pollen *** parameters and air mass movements both greatly affected the atmospheric pollen *** results provide information concerning the dispersion and distribution of birch pollen,paleoenvironmental reconstruction and wetland conservation.

关键词： Airborne pollen Meteorological factor Pearson correlation Betula pollen Ebinur wetland

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新疆帕米尔高原金草滩湿地中晚全新世以来植被演变

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第四纪研究 2024年第3期44卷 770-779页

作者：周彦宏周乐张芸西瑶瑶孔昭宸中国科学院东北地理与农业生态研究所黑土地保护与利用全国重点实验室吉林长春130102 中国科学院植物研究所北京100093 新疆喀什地区草原站新疆喀什844000 中国地质大学(北京)地球科学与资源学院北京100083

湿地沉积物蕴含着大量的古植被信息,是过去全球变化研究的重要领域之一,特别是地处干旱-半干旱区的湿地生态系统,因其生态环境较为脆弱,对气候系统的变化响应十分敏感。本研究以取自新疆帕米尔高原地区金草滩湿地深度为72 cm的剖面为分... 详细信息

湿地沉积物蕴含着大量的古植被信息,是过去全球变化研究的重要领域之一,特别是地处干旱-半干旱区的湿地生态系统,因其生态环境较为脆弱,对气候系统的变化响应十分敏感。本研究以取自新疆帕米尔高原地区金草滩湿地深度为72 cm的剖面为分析对象,选取孢粉环境代用指标,同时结合14C测年数据建立的年代框架,对该区域过去5300年来的植被演变做了初步探讨。研究结果表明:5300~3750 cal.a B.P.期间,湿生植物莎草科和水生植物狸藻属植物孢粉含量较高,指示金草滩湿地局地环境较为湿润,水湿生植物繁盛;3750~0 cal.a B.P.期间,局地环境经历过多次干湿波动变化,如3750~1840 cal.a B.P.期间,耐旱的麻黄属植物占优势,藜亚科花粉也较前期增多,指示局地环境由湿逐渐变干,湿地面积收缩,区域性植被从荒漠草原植被演变成荒漠植被;1840~810 cal.a B.P.前期区域性植被也再次转为荒漠草原植被;之后,环境总体向干旱化趋势发展,湿地周围呈荒漠草原景观。剖面地层中出现含量较低的雪松、云杉和松属花粉应是外来花粉。

关键词：孢粉植被演变金草滩湿地中晚全新世帕米尔高原新疆

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New Evidence of “Little Ice Age” Inferred from ^(14)C and Pollen in the Kanas Wetland, Northern Xinjiang

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Acta Geologica Sinica(English Edition) 2019年第1期93卷 246-247页

作者： LI Yumei ZHANG Yun ZHAO Long kong zhaochen College of Earth Sciences Jilin University State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing Institute of Geo-Environment Monitoring

“Little Ice Age”(LIA)was first introduced by Matthes in 1939 with reference to the phenomenon of cirque glacier regrowth during the *** is located in the Asian monsoon region,and monsoon circulations on ecological environment have a variety of effects on ecological environment during the ***,existing research has little documented on environmental changes based on pollen during the LIA.A 100-cm-deep section of drilling was collected at the Kanas wetland,northern *** using the data of pollen and^14C,we obtained vegetation types from the study area,which will providenew evidence of“Little Ice Age”in the Altay area.

关键词： Ice effects ^14C was has

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First Biological Records of Palaeoecology Changes Inferred from Pollen since 4800 cal. a B.P. in Alahake Saline Lake of North Xinjiang

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 1249-1250页

作者： LI Yumei ZHANG Yun ZHAO Long kong zhaochen College of Earth Sciences Jilin University Changchun 130061 Jilin China State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy ofSciences Beijing 100093 China Beijing Institute of Geo-Environment Monitoring Beijing 100195 China

Objective As the resource treasury of desert biodiversity,the wetland of Betula halophila has fragile ecologic system and low stability,which causes the sudden reduction of wetland *** Alahake Saline Lake is known for an endangered species,Betula ***,palaeoecology changes of the Alahake Saline Lake have been little ***,it is necessary to

关键词： First Biological Records Alahake Saline Lake

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New Biological Records of Paleoecological Changes Inferred from Pollen Since 2500 cal. a B.P. in the Ebinur Lake Area, North Xinjiang

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Acta Geologica Sinica(English Edition) 2021年第4期95卷 1413-1414页

作者： LI Yumei ZHAO Long JIANG Hanchao ZHANG Yun kong zhaochen State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China Development Research Center of China Earthquake Administration Beijing 100036China Beijing Institute of Geo-Environment Monitoring Beijing 100195China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China

Objective Betula microphylla Bunge, as a resource treasury of desert biodiversity, is a pioneer plant in saline-alkaline soil amelioration. According to previous research, Ebinur Lake, north Xinjiang, is a representat... 详细信息

关键词： Xinjiang salinity Paleo

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Environmental changes and lake level fluctuation recorded by lakes on the plain in northern Xinjiang during the late Holocene

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Chinese Science Bulletin 2006年第A1期51卷 60-67页

作者： FENG Xiaohua YAN Shun NI Jian kong zhaochen YANG Zhenjing Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Laboratory of Quantitative Vegetation Ecology Institute of Botany Chinese Academy of Sciences Beijing 100093 China Institute of Hydrologic and Environmental Geology Chinese Academy of Geological Sciences Zhengding 050803 China

Xinjiang 自治区域位于干旱区域在那里的 Chinaand 西是关于过去的温度和潮湿的变化的许多争论。大多数在北 Xinjiang 的平原上的湖是封上的湖和终端湖。他们能显然在 palaeoclimate 反映变化。在 northernXinjiang 的一些平凡的湖的 pa... 详细信息

Xinjiang 自治区域位于干旱区域在那里的 Chinaand 西是关于过去的温度和潮湿的变化的许多争论。大多数在北 Xinjiang 的平原上的湖是封上的湖和终端湖。他们能显然在 palaeoclimate 反映变化。在 northernXinjiang 的一些平凡的湖的 palaeoenvironmental 变化将从西昌·莱克， DongdaohaiziLake 和艾比·莱克主要基于花粉，沉积外形，点火(LOI ) 上的损失，危险性和谷物尺寸的数据在迟了的 Holocene 期间被分析。结果揭示温度和 bycold 湿、温暖干燥的统治的潮湿的一个装配模式。另外，影响因素将被讨论。

关键词：新疆草原湖泊晚全新世水位变化环境改变

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Pollen record and environmental evolution of Caotanhu wetland in Xinjiang since 4550 cal. a BP

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Chinese Science Bulletin 2008年第7期53卷 1049-1061页

作者： ZHANG Yun kong zhaochen NI Jian YAN Shun YANG ZhenJing State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing 100093 China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Institute of Hydrologic and Environmental Geology Chinese Academy of Geological Sciences Zhengding 050803 China

This paper presents a multi-proxy reconstruction of the climate change in Caotanhu wetland using pollen, phytolith and charcoal records, and the data of loss of ignition (LOI), grain size analysis, and susceptibility. Results reveal that between 4550 and 2500 cal. a BP, a dry climatic condition was not favorable for the accumulation of peat. Since 2500 cal. a BP, the climate became humid and the wetland developed with abundant freshwater aquatic plants, which contributed to peat accumulation. Never-theless, alternate periods of rain and dry climate occurred during that period. Between 2500 and 1810 cal. a BP (550 BC―140 AD), the climate was more humid than at present. A lot of emerged plants, such as Phragmites, Typha and Sparganium, and freshwater green algae grew in the wetland which was sur-rounded by desert-steppe vegetation composed mainly of Chenopodiaceae, Artemisia, Compositae and Thalictrum. However, from 1810 to 1160 cal. a BP (140―790 AD), the water level started to decrease and hydrophyte species reduced greatly, but some Phragmites still grew in the wetland and around it was desert vegetation with high proportion of Chenopodiaceae and Artemisia. Then from 1160 to 650 a BP (790―1300 AD), it entered a period of desert-steppe with abundant mesic and xerophytic plants. And a lot of aquatic plants prevailed in the wetland. Here, what is noticeable is that percentages of arboreal pollen, consisting mainly of Betula and Picea, increased greatly and reached a maximal value of 27.2%, in which, Betula percentages rose to 23.2%. Hence, it is reasonable to conclude that Betula grew in the highland of the wetland, or Picea timberline shifted downward resulting in the increase of percentages of Betula and Picea pollen, which were transported into the wetland by flood or wind. But since 650 cal. a BP, desert vegetation prevailed around the wetland again with dominant Chenopodiaceae and Ar-temisia, and the climate was similar to modern one. Despite some aquatic plants

关键词：花粉环境进化湿地多样性

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Fluctuation of Picea timberline and paleoenvironment onthe northern slope of Tian-shan Mountains during the late Holocene

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Chinese Science Bulletin 2006年第14期51卷 1747-1756页

作者： ZHANG Yun kong zhaochen YAN Shun YANG Zhenjing NI Jian Laboratory of Quantitative Vegetation Ecology Institute of Botany Chinese Academy of Sciences Beijing 100093 China Xinjiang Institute of Ecology and Geography Chinese Academy ofSciences ürümqqi 830011 China Institute of Hydrologic and Environmental Geology Chinese Academy of Geological Sciences Zhengding 050803 China

As a good indicator of Holocene climate, the fluctuation of alpine timberline is a synthetical result of impacts of many environmental factors dur-ing geological and historical periods and modern times. As the dominant tree species of mountainous conifer forests on the northern slope of Tianshan Mountains in Xinjiang, the distribution of Picea schrenkiana and its population size are sensitive to climatic change. The typical natural profile of Huashuwozi and the nearby Xiaoxigou archaeologi-cal profile, located in Quanzijie Township, Jimusaer County in Xinjiang, were chosen to analyze and compare the relative high-resolution pollen records, and to measure 14C dating and SEM (scanning elec-tron microscope) microstructure for charcoal frag-ments contained in Xiaoxigou profile’s cultural layers. The results show that in these two profiles, the high percentages of Picea (more than 20% and 35%, re-spectively) appeared in the stratum of the same pe-riod (2000-1300 a BP), which corresponds to the charcoal fragment’s age of Picea schrenkiana con-tained in Xiaoxigou cultural layers. These results convincingly revealed that during the period of 2000-1300 a BP, the timberline for Picea schrenkiana on the northern slope of Tianshan Mountains in Xinjiang declined by about 330m compared with the present.

关键词：云杉属树木线天山北坡全新世

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Altitudinal changes of surface pollen and vegetation on the north slope of the Middle Tianshan Mountains,China

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Journal of Arid Land 2016年第5期8卷 799-810页

作者： YANG Zhenjing ZHANG Yun REN Haibao YAN Shun kong zhaochen MA Keping NI Jian Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological Sciences State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of Sciences Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of Sciences

To provide information on vegetation patterns and altitudinal distributions of pollen assemblage in surface soil layers,their complicated relationships in a dryland mountain-basin system in northwestern China and a realistic basis for paleovegetational reconstruction,we investigated 86 vegetation quadrats and analyzed 80 soil samples from the surface soil layers along an altitudinal transect on the north slope of the Middle Tianshan Mountains from alpine cushion vegetation at 3,510 m near glacier to desert vegetation at 460 m in the Gurbantunggut *** to surface pollen assemblages and the results of the detrended correspondence analysis,the transect can be divided into six major altitudinal pollen zones as alpine cushion vegetation,alpine and subalpine meadows,montane Picea forest,forest-steppe ecotone,Artemisia desert and typical desert,which basically reflect the characteristics of the mountainous vegetation patterns on the north slope of the Middle Tianshan ***,Picea pollen also exists outside the spruce forest,Chenopodiaceae and Artemisia pollen appeared above the elevation of 1,300 m,indicating that most of them might be introduced from lower elevations by upslope *** pollen researches from three regions at different elevations further suggest that a high-frequency northwest anabatic wind has a remarkable influence on the transportation and dispersion of surface pollen in the area.

关键词： altitudinal transect vegetation zone pollen assemblage Picea forest the Middle Tianshan Mountains

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