青藏高原西部高寒荒漠草原相对花粉产量估算  

Estimation of Relative Pollen Productivity in Alpine Desert Steppe of Western Tibetan Plateau

作　　者：李悦[1] 王莹[1] 李月从 张茹春[3] 马林原 由翰飞 王荣荣 曹义航 许清海[1,2] LI Yue;WANG Ying;LI Yuecong;ZHANG Ruchun;MA Linyuan;YOU Hanfei;WANG Rongrong;CAO Yihang;XU Qinghai(School of Geographical Sciences,Hebei Normal University,Shijiazhuang 050024,China;Hebei Key Laboratory of Environmental Change and Ecological Construction,Shijiazhuang 050024,China;Institute of Geographical Science,Hebei Academy of Sciences,Shijiazhuang 050011,China;Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]河北师范大学地理科学学院,河北石家庄050024 [2]河北省环境演变与生态建设重点实验室,河北石家庄050024 [3]河北省科学院地理科学研究所,河北石家庄050011 [4]中国科学院西北生态环境资源研究院,甘肃兰州730000

出　　处：《地球科学进展》2024年第11期1169-1182,共14页Advances in Earth Science

基　　金：青藏高原地球系统基础科学中心项目(编号:41988101);国家自然科学基金项目(编号:U20A20116,42377439)资助。

摘　　要：高寒荒漠草原是青藏高原独有的荒漠草原类型,阿里地区是其代表区域。其相对花粉产量和相关花粉源范围,是基于花粉进行植被和气候定量研究的重要参数之一。基于阿里地区37个样点的现代表土花粉和植被数据,利用ERV模型的不同子模型,以藜科花粉为参考种,估算了禾本科、藜科、蒿属、菊科、十字花科和委陵菜属6种主要花粉类型的相对花粉产量及相关花粉源范围。结果显示,子模型2估算结果最为理想,计算得到的研究区相关花粉源范围为1550 m。主要花粉类型的相对花粉产量如下:藜科(1.000),蒿属(1.286±0.058),菊科(0.689±0.043),委陵菜属(0.139±0.008),十字花科(0.763±0.063)和禾本科(0.003±0.006)。留一法和REVEALS模型检验表明,上述相对花粉产量和相关花粉源范围结果均较为可信,可应用于区域植被重建。Ngari is a unique desert steppe type on the Tibetan Plateau,characterized by its desert steppe ecosystem.This region serves as an ideal representation for studying the quantitative relationships between vegetation and climate.Relative Pollen Productivity(RPP)and Relevant Source Area of Pollen(RSAP)are important parameters for quantitative studies of vegetation and climate based on pollen.Based on modern topsoil pollen and vegetation data from 37 sample sites in the Ngari Desert steppe,different sub-models of the ERV model were utilized,with Chenopodiaceae pollen as the reference species,to estimate the relative pollen production and relevant source area of pollen for five major pollen types:Poaceae,Chenopodiaceae,Artemisia,Asteraceae,Brassicaceae,and Potentilla.The results showed that sub-model 2 provided optimal estimates.The relevant source of pollen in the study area was 1550 m.The relative pollen productivities of the main pollen types are as follows:Chenopodiaceae(=1.000),Artemisia(1.286±0.058),Asteraceae(0.689±0.043),Brassicaceae(0.763±0.063),Potentilla(0.139±0.008),and Poaceae(0.003±0.006).The results of the leave-one-out method and the REVEALS model validation indicate that the above RPP and RSAP results are reliable and can be applied to regional vegetation reconstruction.

关 键 词：高寒荒漠草原 相对花粉产量 相关花粉源范围 ERV模型 REVEALS 

分 类 号：P941.73[天文地球—自然地理学] Q913.6[天文地球—古生物学与地层学]