Surface pollen and modern vegetation in Southern Xinjiang, China
Surface pollen and modern vegetation in Southern Xinjiang, China
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DOI：
10.1007/s11430-022-1248-9
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发表时间：
2024-01
期刊：
影响因子：
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通讯作者：
Yun Zhang;Lixin Chen;Yaoyao Xi;Z. Kong;X. Qiao
中科院分区：
文献类型：
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作者：
Yun Zhang;Lixin Chen;Yaoyao Xi;Z. Kong;X. Qiao
现代花粉和植被的研究可以提高基于化石花粉数据的古环境重建的准确性。采自新疆南部（34°00′ ~ 43 ° 00 ′N，74°00′ ~ 94 ° 00 ′E），海拔888-1530 m，共采集花粉样品188个。对昆仑山北方和天山南部地区的表土花粉和植被进行了研究。结果表明，天山南坡（海拔3530-1124 m）表土花粉可分为山地草原、山地荒漠草原和山地荒漠3个花粉带。这些地带以蒿属、藜科和麻黄花粉为主。帕米尔高原东部（海拔4530-1287 m）的表土花粉组合可分为高山草甸、山地荒漠草原和山地荒漠带，以蒿属、藜科和菊科花粉为主。塔里木盆地南部（3548-888 m）为山地荒漠草原和山地荒漠带，以蒿属和藜科花粉为主。利用ArcGIS、R值和Pearson相关性分析获得的地表花粉的地理分布表明，过度代表的云杉属和松树属花粉是外部来源的，并通过风、水（河流）和冰（冰川运动）运输。麻黄和白刺分别主要分布在山地荒漠和荒漠草原区。藜科和蒿属植物花粉在南疆分布广泛，核桃属植物花粉集中分布在核桃树分布区，强烈表明当地亲本植物的存在。根据混合单粒子拉格朗日积分轨道模型，春季和夏季有较多的松花粉被气流输送到帕米尔地区，导致其表面花粉含量较高。阐明新疆南部现代花粉与植被关系的研究，可为大规模古环境重建提供新疆地表孢粉学数据库。
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 888–1530 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 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 desert. These zones were dominated byArtemisia, Chenopodiaceae, andEphedrapollen. 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 byArtemisia, Chenopodiaceae, and Asteraceae pollen. However, the Southern Tarim Basin (3548–888 m) comprised montane desert steppe and montane desert zones, which was dominated byArtemisiaand Chenopodiaceae pollen. The geographic distribution of the surface pollen sites obtained using ArcGIS, theR-value, and Pearson correlation analyses indicated that the over-representedPiceaandPinuspollen were of external origin and were transported by wind, water (rivers), and ice (glacier movement). Over-representation ofEphedraandNitrariapollen was mainly distributed in the montane desert and desert steppe zones, respectively. Pollen from Chenopodiaceae andArtemisiawere over-represented and broadly distributed across Southern Xinjiang.Juglanspollen 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, morePinuspollen 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.