Effective palynological diversity indices for reconstructing angiosperm diversity in China  

作　　者：Yuxuan Jiang Fuli Wu Xiaomin Fang Haitao Wang Yulong Xie Cuirong Yu 

机构地区：[1]State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Lincui Road 16,Beijing 100101,China [2]University of Chinese Academy of Sciences,Beijing 100101,China [3]Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China [4]Key Laboratory of Palaeobiology and Petroleum Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China

出　　处：《Plant Diversity》2025年第2期244-254,共11页植物多样性(英文版)

基　　金：co-supported by the National Key Research and Development Program of China(2022YFF0800800);the National Natural Science Foundation of China(41988101-01,42130205);the Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0707)。

摘　　要：The utilization of palynological data for plant diversity reconstructions offers notable advantages in addressing the discontinuity of plant fossils in the stratigraphic record.However,additional studies of modern processes are required to validate or refine the accuracy of diversity results obtained from palynological data.In this study,we used a modern pollen dataset of China to compare the accuracy of plant diversity reconstructions using five different palynological diversity indices(i.e.,the pollen species number,BergereParker index,Simpson diversity index,Hill index,and ShannoneWiener index)over a large spatial scale.We then identified climate factors that are most strongly correlated with these patterns of plant diversity.We found that the index that most accurately reflects plant diversity is the ShannoneWiener index.Our analyses indicated that the most effective indices at reflecting plant diversity are the ShannoneWiener index and BergereParker index.Numerical analysis revealed that palynological diversity(measured using the ShannoneWiener index)was strongly correlated with climatic parameters,in particular average temperature in the coldest month and annual precipitation,suggesting these factors may be primary determinants of plant diversity distribution.We also found that a threshold value of the normalized ShannoneWiener index(NH=0.4)approximately aligns with the contour line specifying 400 mm annual precipitation,serving as a rudimentary indicator for assessing plant diversity in arid versus humid climates.This study suggests that pollen diversity indices have remarkable potential for quantitatively reconstructing paleoclimatic parameters.

关 键 词：Angiosperm diversity POLLEN Diversity indices Climatic parameters 

分 类 号：Q94[生物学—植物学]