天山南坡阔克沙勒岭地区表土花粉分布特征  

SURFACE POLLEN DISTRIBUTION IN THE KOKSHAL DISTRICT,SOUTH OF THE TIANSHAN MOUNTAINS,XINJIANG,CHINA

作　　者：姚付龙 孙岳珊 夏倩倩 胡晓峰 唐国乾 YAO Fulong;SUN Yueshan;XIA Qianqian;HU Xiaofeng;TANG Guoqian(Institute of Resources and Ecology/College of biological and Geographical Sciences,Yili Normal University,Yining 835000,China)

机构地区：[1]伊犁师范大学资源与生态研究所/生物与地理科学学院,伊宁835000

出　　处：《微体古生物学报》2023年第4期379-389,共11页Acta Micropalaeontologica Sinica

基　　金：新疆维吾尔自治区自然科学基金(2022D01C457);伊犁师范大学学实高层次人才岗位项目(YSXSGG22004);国家自然科学基金(41961013);新疆维吾尔自治区大学生创新创业项目(S202210764006);伊犁哈萨克自治州科技计划项目(YJC2023A05)共同资助。

摘　　要：表土花粉组合及其与现代植被分布的对应关系,是利用地层花粉开展古植被与古气候重建的基础。本文通过对阔克沙勒岭地区60个表土花粉样品,运用聚类分析和降趋势对应分析方法研究探讨天山南坡表土花粉分布规律及影响因素。结果表明,(1)蒿属(Artemisia)、藜科(Chenopodiaceae)花粉呈超代表性,蒿属/藜科值的大小可指示湿度变化,还可用于区分荒漠和荒漠草原植物群落;麻黄属(Ephedra)、莎草科(Cyperaceae)花粉代表性较好,在表土花粉组合中优势明显;禾本科(Poaceae)代表性偏低,推测与其自身花粉产量、群落物种多样性等因素有关;(2)阔克沙勒岭地区各植被带花粉组合特征显著,灌木/半灌木荒漠带麻黄属、藜科花粉含量高,蒿属、白刺属(Nitraria)、柽柳属(Tamarix)在各自分布区得到应有体现;禾本科花粉由于低代表性而在荒漠草原带、高寒草原带的优势不明显,在高寒草原带含量略高;莎草科花粉在嵩草草甸带组合中含量居首位,体现出了其在该植被带中的优势;(3)聚类分析和降趋势对应分析在阔克沙勒岭表土花粉研究中能划分识别植被带,降趋势对应分析揭示湿度是影响植被分布的主要因素。The surface pollen distribution and its relationship with the modern vegetation are fundamental for the reconstruction of palaeovegetation and paleoclimate when using the stratigraphic pollen assemblages.This study performed a study on 60 soil samples collected from the Kokshal district with an aim at the distribution and influential factors of the modern pollen in the southern slope of the Tianshan Mountains.Cluster analysis and detrended correspondence analysis have been adopted.The results show that,(1) Pollen of Chenopodiaceae and Artemisia are the super representative in the assemblages and the ratio of Artemisia to Chenopodiaceae is indicative of the humidity and can be used to differentiate desert and desert steppe plant communities;Ephedra and Cyperaceae have a good representation in soil sample assemblages;Poaceae is relatively low in representation,which may be related to its productivity and the species diversity in a vegetation zone and other factors.(2) Pollen combinations in all vegetation zones in the Kokshal district are usually distinctive,with Ephedra and Chenopodiaceae being high abundance in the shrub and semi-shrub desert zones,and Artemisia,Nitraria and Tamarix occurring in their growing areas;pollen of Poaceae is not as well represented as their plants do in the desert steppe and alpine steppe zones;in comparison,Poaceae and Cyperaceae in the alpine steppe zone have higher contents than those that in the desert steppe zone;the pollen content of Cyperaceae in the Kobresia meadow belt ranks first,reflecting the advantages of Cyperaceae plants in this vegetation belt.(3) Cluster analysis and detrended correspondence analysis can be used in the surface soil pollen for the recognition of the vegetation zones;DCA has revealed that the humidity is the main factor affecting the vegetation distribution.

关 键 词：表土花粉 分布特征 花粉-植被关系 降趋势对应分析 天山 

分 类 号：Q913.84[天文地球—古生物学与地层学]