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Bulletin of Botanical Research ›› 2024, Vol. 44 ›› Issue (6): 879-889.doi: 10.7525/j.issn.1673-5102.2024.06.009

• Physiology and Ecology • Previous Articles     Next Articles

Spatial Structure and Regeneration Count Model of Taxus cuspidata Forests in Muling National Nature Reserve of Heilongjiang Province

Yueqian LI1, Weiwei JIA1,2, Wancai ZHU1,3(), Yunfei DIAO1,4   

  1. 1.College of Forestry,Northeast Forestry University,Harbin 150040
    2.Key Laboratory of Sustainable Forest Ecosystems Management,Ministry of Education(Northeast Forestry University),Harbin 150040
    3.Forestry Science Research Institute of Heilongjiang Province,Harbin 150081
    4.Ecological Research Institute of Heilongjiang Province,Harbin 150081
  • Received:2024-06-29 Online:2024-11-20 Published:2024-11-22
  • Contact: Wancai ZHU E-mail:zhuwancai@sina.com

Abstract:

To investigate the spatial structure, distribution pattern, and seedling regeneration of Taxus cuspidata populations, the T. cuspidata community in the Muling National Nature Reserve was used as materials, and a standard plot of 300 m×400 m was established, and individual trees were investigated for their species name, growth and spatial position. Spatial structure parameters such as uniform angle index, neighborhood comparison, and mingling degree were calculated. The spatial structure, distribution pattern, and interspecies relationship curves of T. cuspidata populations were analyzed. Four regeneration count models including Poisson, negative binomial, zero-inflated Poisson, and Hurdle-Poisson were further established and compared for the regeneration of T. cuspidata seedlings. The results indicated that: (1)the spatial structure unit of T. cuspidata populations primarily exhibited random distribution, high mingling degree, and high uniformity index, with a relative frequency of 0.619 6; (2)the population demonstrated an aggregated distribution at a scale of 0-100 m; (3)a positive correlation was observed for T. cuspidata populations at a scale of 0-150 m, and seedlings showed varying correlations with their maternal trees across different scales, while correlations with other dominant species were relatively low; (4)T. cuspidata seedlings exhibited an aggregated distribution at a scale of 0-25 m, with an optimal regeneration count model being the Negative Binomial model.

Key words: Taxus cuspidata, stand spatial structure, spatial distribution pattern, interspecies correlation, counting models

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