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FOREST RESOURCES WANAGEMENT ›› 2021›› Issue (2): 149-157.doi: 10.13466/j.cnki.lyzygl.2021.02.020

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Quantitative Dynamics and Spatial Distribution Pattern of Pinus yunnanensis Population in Northwest of Guizhou Province

HE Bin(), LI Qing, LI Yangzheng, LI Wangjun   

  1. 1. The Key Laboratory of Ecological Protection and Restoration of Typical Plateau Wetland in Guizhou Province,Bijie,Guizhou 551700,China
    2. College of Ecological Engineering,Guizhou University of Engineering Science,Bijie,Guizhou 551700,China
  • Received:2021-03-12 Revised:2021-04-09 Online:2021-04-28 Published:2021-06-03

Abstract:

The study of population dynamics and spatial distribution pattern is of great significance to elucidate the population development mechanism,various ecological processes,as well as the stability and succession law of the community.This study aimed to clarify the structure of Pinus yunnanensis population in the northwest part of Guizhou Province.Through data from field survey and the method of “space instead of time”,the population dynamic quantitative characteristics are studied based on the static life table and quantitative analysis methods.The population distribution pattern was analyzed with the diffusion coefficient,aggregation intensity index and clumping index.The results showed that:(1)The population structure of P.yunnanensis was spindle type,and mainly aggregated on age classⅢ—ⅥⅠ(78.93%).(2)The population survival curves tended to be Deevey-Ⅱ type,indicating that the population was on an overall growth trend,but gradually tended to be stable.(3)The population distribution pattern was generally cluster distribution,but there were some differences in the degree of clustering of populations in different plots.With the increase of age class,the spatial distribution pattern of population changed from cluster distribution to uniform distribution.This study can provide theoretical basis for the sustainable management of Pinus yunnanensis forest and further provide reference for the management and protection of forest ecosystem in karst areas.

Key words: Pinus yunnanensis, population structure, static life table, survival curve, spatial distribution pattern

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