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应用生态学报 ›› 2020, Vol. 31 ›› Issue (11): 3605-3613.doi: 10.13287/j.1001-9332.202011.002

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栓皮栎人工林灌木层植物多样性的空间分布及其与光环境的关系

闫东锋*, 贺文, 杨喜田   

  1. 河南农业大学林学院, 郑州 450002
  • 收稿日期:2020-06-24 接受日期:2020-08-09 出版日期:2020-11-15 发布日期:2021-06-10
  • 通讯作者: * E-mail: yandongfeng2002@126.com
  • 作者简介:闫东锋, 男, 1979年生, 博士研究生。主要从事森林可持续经营和数量生态学研究。E-mail: yandongfeng2002@126.com
  • 基金资助:
    河南省重点研发与推广专项(科技攻关)(192102110060)和国家重点研发计划项目(2018YFD0600204-4)资助

Spatial distribution of plant diversity in shrub layer of Quercus variabilis plantation and its relationship with light environment

YAN Dong-feng*, HE Wen, YANG Xi-tian   

  1. College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2020-06-24 Accepted:2020-08-09 Online:2020-11-15 Published:2021-06-10
  • Contact: * E-mail: yandongfeng2002@126.com
  • Supported by:
    the Key Specialized Research and Development Breakthrough (Science and Technology) in Henan Province (192102110060) and the National Key Research and Development Program of China (2018YFD0600204-4).

摘要: 采用地统计学方法,对栓皮栎纯林和栓皮栎-侧柏混交林2种林分类型灌木层植物物种多样性空间异质性及其与光环境的关系进行研究。结果表明: 栓皮栎纯林灌木层植物Shannon(H)、Simpson(Ds)、Margalef(Ma)物种多样性指数均显著小于栓皮栎-侧柏混交林。栓皮栎纯林灌木层植物物种多样性指数的变程和空间自相关距离均大于栓皮栎-侧柏混交林,其空间均一性较差,空间依赖性较强。栓皮栎纯林灌木层植物HDsMa结构比为44.2%~49.7%,具有中等强度的空间自相关性;栓皮栎-侧柏混交林中HDsMa结构比为1.5%~3.3%,具有强烈的空间自相关性。栓皮栎纯林灌木层植物物种多样性指数的空间分布主要呈明显的条带状梯度变化,而栓皮栎-侧柏混交林则呈明显的斑块状梯度变化,说明栓皮栎混交林灌木层植物较栓皮栎纯林空间连续性差,空间变异更为显著。相关与逐步回归分析表明,对栓皮栎纯林和栓皮栎-侧柏混交林灌木层植物多样性影响最为显著的光环境指标分别是林下总光照和冠层开度,冠层结构所形成的光环境在维持及形成灌木层植物多样性方面起到重要作用。

关键词: 栓皮栎, 灌木层, 物种多样性, 空间异质性

Abstract: We analyzed the spatial heterogeneity of plant species diversity in shrub layers and its relationship with light environment in Quercus variabilis plantation and Q. variabilis-Platycladus orientali mixed forest, following the method of geostatistics. The results showed that plant species diversity indices (Shannon H, Simpson Ds, Margalef Ma) of shrub layers in Q. variabilis plantation were significantly lower than that in Q. variabilis-P. orientalis mixed forest. The variation ranges and spatial autocorrelation distances of plant species diversity index in Q. variabilis plantation were higher than that in Q. variabilis-P. orientalis mixed forest, with lower spatial homogeneity but stronger spatial dependence. The plant species diversity indices of H, Ds and Ma structural ratios of shrub layers in Q. variabilis pure forest were 44.2%-49.7%, with moderate spatial autocorrelation. The structure ratios of H, Ds and Ma in Q. variabilis-P. orientalis mixed forest were 1.5%-3.3%, with strong spatial autocorrelation. The spatial distribution of biodiversity showed obvious strip-like gradient trend in Q. variabilis plantation and patchy gradient change in Q. variabilis-P. orientalis mixed forest, suggesting that the spatial continuity of plant species of shrub layers was worse in Q. variabilis-P. orientalis mixed forest and that the spatial variation was stronger than that in Q. variabilis pure forest. Results of correlation analysis and stepwise regression analysis showed that the total light and plant canopy openness were the most significant factors affecting plant species diversity of shrub layers in both forest types. Light environment formed by plant canopy structure played a crucial part in maintaining plant diversity in shrub layer.

Key words: Quercus variabilis, shrub layer, species diversity, spatial heterogeneity