库姆塔格沙漠东南缘砂黄土沉积区孢粉来源分析  

Source analysis of pollen in the BL sand loesssite on the southeastern edge of the Kumtag Desert

作　　者：马曙光 丁峰[3,4] 胡小柯 李亚[3,4] 张裕年 张进虎[1,2] MA Shu-guang;DING Feng;HU Xiao-ke;LI Ya;ZHANG Yu-nian;ZHANG Jin-hu(Key Laboratory of Surface Processes and Ecological Conservation on the Qinghai-Xizang Plateau,ministry of Education,Qinghai Normal University,Xining 810016,China;Key Laboratory of Physical Geography and Environmental Processes of Qinghai Province,School of Geography,Qinghai Normal University,Xining 810016,China;Gansu Desertification Research Institute,Lanzhou 730070,China;National Field Scientific Observation and Research Station for Desert-Grassland Ecosystems in Minqin of Gansu Province,Wuwei 733300,China)

机构地区：[1]青海师范大学青藏高原地表过程与生态保育教育部重点实验室,青海西宁810016 [2]青海师范大学地理科学学院青海省自然地理与环境过程重点实验室,青海西宁810016 [3]甘肃省治沙研究所,甘肃兰州730070 [4]甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃武威733300

出　　处：《青海师范大学学报(自然科学版)》2025年第1期65-73,共9页Journal of Qinghai Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(32060375)。

摘　　要：了解表土孢粉与现代植被之间的对应关系在古植被、古环境的恢复和重建中具有重要意义.本研究选取库姆塔格沙漠东南缘阿尔金山北麓砂黄土沉积区表土样品开展孢粉分析,探讨其与周边现存植被的关系,并讨论了部分典型孢粉的来源.结果显示:藜科(Chenopodiaceae)、蒿属(Artemisia)、禾本科(Poaceae)、菊科(Asteraceae)、白刺属(Nitraria)、沙拐枣属(Calligonum)等孢粉与区域植被较为一致,孢粉组合总体特征反映了区域植被的组成;而柽柳属(Tamaricaceae)、蔷薇科(Rosaceae)、麻黄属(Ephedra)、莎草科(Cyperaceae)、豆科(Fabaceae)、榆科(Ulmaceae)等植物,现主要出现于沙漠西北部阿奇克谷地、北部西湖湿地、东部河谷滩地,沙漠南缘低山丘陵及冲沟区,可能是被区域主风向西北风及东北风携带进入研究区;乔木孢粉松属(Pinus)、云杉属(Picea)、桦木属(Betula)等在表土样品中也有少量出现,应为外来孢粉,其来源也与春夏季盛行的东北风有关.研究结果为今后开展库姆塔格地区砂黄土沉积地层中的孢粉分析,研究古植被群落特征以及重建荒漠化过程提供了重要的对比资料和借鉴依据.Understanding the correspondence between surface soil pollen and modern vegetation is of great significance for the reconstruction and restoration of ancient vegetation and paleoenvironment.In this paper,topsoil samples from the BL sandy loess point area at the northern foot of Altunshan Mountain,on the south-eastern edge of the Kumtag Desert,were selected for spore pollen analysis,to explore their relationship with the existing vegetation in the surrounding area,and to discuss the sources of some typical spore pollen.The results showed that the pollen of Chenopodiaceae,Artemisia,Poaceae,Asteraceae,Nitraria and Calligonum were consistent with the regional vegetation and the overall characteristics of the pollen assemblage reflected the composition of the regional vegetation.Tamaricaceae,Rosaceae,Ephedra,Cyperaceae,Fabaceae,Ulmaceae and other plants,is now mainly found in the north-western part of the desert Aqiq Valley,the northern West Lake wetland,the eastern valley beach,the southern edge of the desert,low hills and It may be carried into the study area by the main wind direction of the region,which is the north-west wind and the north-east wind.Pollen from trees such as Pinus,Picea,Betula,etc.were also found in small amounts in the topsoil samples,which is likely to be exotic pollen,and the source of which is also related to the prevalence of the north-east wind in the spring and summer seasons.The results of the study provide important comparative information and references for future analysis of sporulation in the sandy loess sedimentary strata of the Kumtag region,research on the characteristics of ancient vegetation communities,and reconstruction of desertification processes.

关 键 词：库姆塔格沙漠东南缘 BL砂黄土点 表土孢粉 孢粉来源 

分 类 号：P941.73[天文地球—自然地理学] Q913.84[天文地球—古生物学与地层学]