Advances in Earth Science ›› 2024, Vol. 39 ›› Issue (11): 1169-1182. doi: 10.11867/j.issn.1001-8166.2024.086

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

Yue LI 1( ), Ying WANG 1, Yuecong LI 1 , 2, Ruchun ZHANG 3, Linyuan MA 4, Hanfei YOU 1, Rongrong WANG 1, Yihang CAO 1, Qinghai XU 1 , 2( )   

  1. 1.School of Geographical Sciences, Hebei Normal University, Shijiazhuang 050024, China
    2.Hebei Key Laboratory of Environmental Change and Ecological Construction, Shijiazhuang 050024, China
    3.Institute of Geographical Science, Hebei Academy of Sciences, Shijiazhuang 050011, China
    4.Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2024-06-21 Revised:2024-09-26 Online:2024-11-10 Published:2025-01-17
  • Contact: Qinghai XU E-mail:19831120190@163.com;xuqinghai@hebtu.edu.cn
  • About author:LI Yue, research area includes surface pollen in the Tibetan Plateau. E-mail: 19831120190@163.com
  • Supported by:
    the Basic Science Center of Tibetan Plateau Earth System(41988101);The National Natural Science Foundation of China(U20A20116)

Yue LI, Ying WANG, Yuecong LI, Ruchun ZHANG, Linyuan MA, Hanfei YOU, Rongrong WANG, Yihang CAO, Qinghai XU. Estimation of Relative Pollen Productivity in Alpine Desert Steppe of Western Tibetan Plateau[J]. Advances in Earth Science, 2024, 39(11): 1169-1182.

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 1 550 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.

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