欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2020, Vol. 31 ›› Issue (12): 3989-3996.doi: 10.13287/j.1001-9332.202012.006

• • 上一篇    下一篇

喀斯特次生林幼树更新空间分布格局及种间关联性

池森1, 王从军2, 黎庆菊2, 吴志红2, 柴宗政1*   

  1. 1贵州大学林学院, 贵阳 550025;
    2紫云苗族布依族自治县林业局, 贵州紫云 550800
  • 收稿日期:2020-07-01 接受日期:2020-09-20 发布日期:2021-06-15
  • 通讯作者: *E-mail: chaizz@126.com
  • 作者简介:池森,男,1998年生,硕士研究生。主要从事森林可持续经营研究。E-mail:chisen9813@126.com
  • 基金资助:
    贵州省科技计划项目(黔科合基础[2019]1076号)和贵州大学引进人才科研项目(贵大人基合字[2017]37号)资助

Spatial distribution and interspecific associations of regenerating saplings in karst secondary forests.

CHI Sen1, WANG Cong-jun2, LI Qing-ju2, WU Zhi-hong2, CHAI Zong-zheng1*   

  1. 1College of Forestry, Guizhou University, Guiyang 550025, China;
    2Forestry Bureau for Miao and Buyi Autonomous County, Ziyun 550800, Guizhou, China
  • Received:2020-07-01 Accepted:2020-09-20 Published:2021-06-15
  • Contact: *E-mail: chaizz@126.com
  • Supported by:
    Science and Technology Project of Guizhou Province of China (QKHJC[2019]1076) and the Guizhou University Fund for the Introduction of Talents (GDRJHZ[2017]37)

摘要: 本研究以贵州省喀斯特典型区域紫云苗族布依族自治县撂荒30余年后自然恢复形成的次生林为对象,设置140 m×120 m固定样地,系统调查样地内幼树更新,并采用空间点格局分析方法分析幼树更新优势种群在不同空间尺度下的分布格局和种间关联性。结果表明: 调查样地中幼树共计1291株,包括39个树种,其中光皮桦、化香、马尾松、枫香和山杨5个树种的幼树个体数量总和达83.7%,重要值总和达77.8%,为幼树更新的优势树种。光皮桦、化香和枫香3个幼树优势种群的空间分布格局在0~60 m空间尺度上均呈现较强的聚集分布;马尾松和山杨2个幼树优势种群在小尺度上呈现聚集分布,大尺度上则随机分布。幼树优势种群空间关联性多呈现正关联,仅马尾松与枫香和山杨在小尺度呈现正关联,大尺度呈现不相关。调查样地5个幼树优势种群空间分布格局及种间关联性差别较大,可能与树种的生物学特性、生境及空间资源的利用密切相关。目前,林分多以先锋树种为主,群落结构不稳定;以马尾松和光皮桦为优势种群的松-桦混交林可能成为下一阶段演替方向,建议通过森林经营措施加快植被恢复进程。

关键词: 喀斯特, 次生林, 幼树, 空间分布格局, 种间关联性

Abstract: A 140 m×120 m plot was set in a secondary forest with more than 30 years natural reco-very after abandonment in Ziyun Miao and Buyi Autonomous County, a typical karst area in Guizhou Province. We investigated the spatial distribution and interspecific associations of regenerating sapling population using spatial point pattern analytical method. There were 1291 saplings with 39 tree species. Betula luminifera, Platycarya strobilacea, Liquidambar formosana, Pinus massoniana and Populus davidiana were the dominant populations of regenerating saplings, accounting for 83.7% of the saplings and 77.8% of the total importance value. The spatial distributions of B. luminifera, P. strobilacea and L. formosana were strongly aggregated at a spatial scale of 0-60 m, while the spatial distributions of P. massoniana and P. davidiana were aggregated at small scale and randomly distributed at large scale. The spatial associations among those dominant populations were mostly positively correlated, with positive correlations of P. massoniana with L. formosana and P. davidiana at small scale but no associations at large scale. In conclusion, the spatial distributions and interspecific associations differed among the dominant sapling populations, due to the different biological characteristics of different tree species, habitats and uses of spatial resources. Most of the stands investigated were dominated by pioneering species, with poor stand quality and unstable community structure. A mixed forest dominated by P. massoniana and B. luminifera would be the next stage of succession. We recommended that measures of forest management should be adopted to accelerate vegetation restoration.

Key words: karst, secondary forest, sapling, spatial distribution pattern, interspecific association.