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植物研究 ›› 2024, Vol. 44 ›› Issue (6): 879-889.doi: 10.7525/j.issn.1673-5102.2024.06.009

• 生理与生态 • 上一篇    下一篇

穆棱东北红豆杉林空间结构特征与更新计数模型

李越千1, 贾炜玮1,2, 朱万才1,3(), 刁云飞1,4   

  1. 1.东北林业大学林学院,哈尔滨 150040
    2.森林生态系统可持续经营教育部重点实验室(东北林业大学),哈尔滨 150040
    3.黑龙江省林业科学研究所,哈尔滨 150081
    4.黑龙江省生态研究所,哈尔滨 150081
  • 收稿日期:2024-06-29 出版日期:2024-11-20 发布日期:2024-11-22
  • 通讯作者: 朱万才 E-mail:zhuwancai@sina.com
  • 作者简介:李越千(2000—),男,硕士研究生,主要从事森林经营研究。
  • 基金资助:
    “十四五”国家重点研发计划项目子课题(2022YFD2201004-02)

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

摘要:

为了解东北红豆杉(Taxus cuspidata)种群空间结构、分布格局及更新幼苗情况,以穆棱东北红豆杉国家级自然保护区东北红豆杉群落为研究对象,建立300 m×400 m标准地,开展树种记录、生长调查及空间定位,计算角尺度、大小比数、混交度等空间结构参数,分析东北红豆杉种群空间结构、分布格局和种间关系,分别建立并比较东北红豆杉更新苗木的泊松、负二项、零膨胀泊松和Hurdle泊松4种计数模型。结果表明:(1)东北红豆杉种群空间结构单元以随机分布、高混交度、高大小比数为主,相对频率为0.619 6;(2)东北红豆杉种群在0~100 m尺度呈现聚集分布;(3)东北红豆杉种群在0~150 m尺度均表现为正相关,幼苗与母树在不同尺度下表现出不同相关性,与其他优势种群相关性不高;(4)东北红豆杉幼苗在0~25 m尺度聚集分布,最优更新计数模型为负二项模型。

关键词: 东北红豆杉, 林分空间结构, 空间分布格局, 种间关联性, 计数模型

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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