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Chinese Journal of Applied Ecology ›› 2017, Vol. 28 ›› Issue (11): 3487-3493.doi: 10.13287/j.1001-9332.201711.003

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Spatial point pattern analysis of main trees and flowering Fargesia qinlingensis in Abies fargesii forests in Mt Taibai of the Qinling Mountains, China

LI Guo-chun1, SONG Hua-dong1, LI Qi2, BU Shu-hai1*   

  1. 1 College of Life Science, Northwest A&F University, Yangling 712100, Shaanxi, China
    2 College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China
  • Online:2017-11-18 Published:2017-11-18
  • Contact: *mail:wildlife@nwsuaf.edu.cn
  • Supported by:
    This work was supported by the State Forestry Administration’s International Coo-peration Project for Giant Panda (AD1411)

Abstract: In Abies fargesii forests of the giant panda’s habitats in Mt. Taibai, the spatial distribution patterns and interspecific associations of main tree species and their spatial associations with the understory flowering Fargesia qinlingensis were analyzed at multiple scales by univariate and bivaria-te O-ring function in point pattern analysis. The results showed that in the A. fargesii forest, the number of A. fargesii was largest but its population structure was in decline. The population of Betula platyphylla was relatively young, with a stable population structure, while the population of B. albo-sinensis declined. The three populations showed aggregated distributions at small scales and gradually showed random distributions with increasing spatial scales. Spatial associations among tree species were mainly showed at small scales and gradually became not spatially associated with increasing scale. A. fargesii and B. platyphylla were positively associated with flowering F. qinlingensis at large and medium scales, whereas B. albo-sinensis showed negatively associated with flowering F. qinlingensis at large and medium scales. The interaction between trees and F. qinlingensis in the habitats of giant panda promoted the dynamic succession and development of forests, which changed the environment of giant panda’s habitats in Qinling.