Surface pollen and modern vegetation in Southern Xinjiang,China

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外文摘要：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 m.Surface pollen and vegetation were studied in the northern region of the Kunlun Mountains and the southern region of the Tianshan Mountains.The results showed that the surface pollen assem-blages 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 desert.These zones were dominated by Artemisia,Chenopodiaceae,and Ephedra pollen.The 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 pollen.However,the Southern Tarim Basin(3548-888 m)comprised montane desert steppe and montane desert zones,which was dominated by Artemisia and Chenopodiaceae pollen.The 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,respectively.Pollen from Chenopodiaceae and Artemisia were over-represented and broadly distributed across Southern Xinjiang.Juglans pollen was concentrated in areas with walnut trees,strongly indicating the presence of local parent plants.According to the Hybrid Single-particle 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 content.Research elucidating the relationship between modern pollen and vegetation in southern Xinjiang could provide data describing the surface palynological database of Xinjiang for use in large-scale paleoenvironmental reconstructions.

外文关键词：

Surface pollenVegetation DistributionPiceaSouthern Xinjiang

作者：

Yun ZHANG、Lixin CHEN、Yaoyao XI、Zhaochen KONG、Xianguo QIAO

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作者单位：

State Key Laboratory of Black Soils Conservation and Utilization,Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130102,China

Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China

Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China

University of Chinese Academy of Sciences,Beijing 100049,China

School of Geosciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China

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基金：

National Earth System Science Data Sharing InfrastructureNational Science & Technology Infrastructure of ChinaNational Cryosphere Desert Data CenterNational Tibetan Plateau Data CenterNational Natural Science Foundation of ChinaStrategic Priority Research Program of the Chinese Academy of Sciences

项目编号：

41971121 & 42271161XDB31000000

出版年：

2024

DOI：

10.1007/s11430-022-1248-9

中国科学:地球科学(英文版)

中国科学院

中国科学:地球科学(英文版)

影响因子：1.002

ISSN：1674-7313

年,卷(期)：2024.67(2)

参考文献量82