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Bulletin of Botanical Research ›› 2020, Vol. 40 ›› Issue (6): 855-866.doi: 10.7525/j.issn.1673-5102.2020.06.008

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Differences in Population Structure and Dynamic Characteristics of Davidia involucrata Baill. Between High and Low Latitude Regions

Yun-Fei XU1,2, Qin-Song LIU1,2, Wen-Juan XU1,2, Jun-Feng TANG1,2, Ting-Fa DONG1,2, Bao-Zhen YANG1, Xiao XU1,3()   

  1. 1.Key Laboratory of Southwest China Wildlife Resources Conservation,Ministry of Education,Nanchong 637009
    2.College of Life Sciences,China West Normal University,Nanchong 637009
    3.Institute of Plant Adaptation and Utilization in Southwest Mountain,China West Normal University,Nanchong 637009
  • Received:2020-06-01 Online:2020-11-20 Published:2020-11-04
  • Contact: Xiao XU E-mail:xuxiao_cwnu@163.com
  • About author:XU Yun-Fei(1994—),master student, majoring in plant ecology.
  • Supported by:
    Talents Foundation of China West Normal University(17YC351);National Natural Science Foundation of China(31900277);The Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0404)


Davidia involucrata Baill. is a rare and endangered tree species which is endemic to China. Though population characteristics of D.involucrata have been reported by many studies, the effect of latitude on the structure and dynamic characteristics of D.involucrata has been largely neglected. In this study, we compared the variance of the age structure dynamic index, static life table, viability and quantity alteration of the populations between high latitude region(Pingwu) and low latitude region(Northeastern Yunnan). Our results showed that the population structure in Pingwu and Northeastern Yunnan were of growth type, the survival curve of the two D.involucrata populations was of a Deevey-Ⅱ type, and the population in Northeastern Yunnan displayed a higher growth trend and stronger anti-interference ability. Moreover, the population dynamics analysis revealed that younger individuals grew better in Pingwu and the middle-aged individuals competed fiercely. By contrast, younger individuals in Northeastern Yunnan population had high mortality, middle-aged individuals grew stable. Thus, based on the abovementioned findings, we conclude that latitude differences could affect population structure and dynamic characteristics of D.involucrata. The habitats of D.involucrata population at low latitude were suitable for middle-aged individuals to survive but not for younger individuals; younger individuals of D.involucrata populations at high latitude grew better, and higher mortality rate was observed in middle-aged individuals.

Key words: Davidia involucrata Baill., age structure, static life table, survival curve, viability

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