| 八大公山栎类林分空间结构对林下灌木物种多样性影响分析 |
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| 引用本文： | 边更战,朱光玉.八大公山栎类林分空间结构对林下灌木物种多样性影响分析[J].中国农学通报,2020,36(19):39-43. |
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| 作者姓名： | 边更战 朱光玉 |
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| 作者单位： | ;1.湖南省农林工业勘察设计研究总院,长沙 410000;2.中南林业科技大学,长沙 410000 |
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| 基金项目： | 国家自然科学基金项目“亚热带栎类天然混交林立地质量评价与生长预估”(31570631);国家林业局项目“湖南省金洞林场立地质量评价研究及示范”(1692016-06);湖南省教育厅项目“多形立地指数模型的构建及应用研究”(17C1664) |
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| 摘 要： | 林分空间结构会显著影响其林下植被多样性,为明确其影响灌木物种多样性的关键因子,以八大公山栎类天然次生林为研究对象,计算混交度、大小比数、开敞度指数以及聚集指数代表林分空间结构,计算Margalef指数、Pielou指数和Auclair Goff指数评价灌木物种多样性,并利用Pearson相关系数分析方法探究两者间的相关关系。结果表明,八大公山栎类天然次生林的林下灌木物种多样性变化与开敞度和林木聚集指数之间存在着明显的相互影响关系。开敞度与Pielou指数、聚集指数与Auclair Goff指数表现出明显的相互影响关系;随着开敞度的增大,Pielou指数增大,即林下灌木物种均匀度不断增加;随着八大公山栎类聚集指数增加,Auclair Goff指数增加,即林下灌木的物种多样性程度不断增长。因此,以调整树种结构为主,综合研究调整林木空间的格局和分布,尤其在林木开敞度、聚集度方面能够起到提高八大公山栎类天然次生林下灌木物种多样性的作用。
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| 关 键 词： | 林分空间结构 物种多样性 林下灌木 简单相关分析 |
| 收稿时间： | 2019-05-27 |
Effects of Spatial Structure of Quercus on Species Diversity of Undergrowth Shrubs in Badagong Mountain |
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| Bian Gengzhan,Zhu Guangyu.Effects of Spatial Structure of Quercus on Species Diversity of Undergrowth Shrubs in Badagong Mountain[J].Chinese Agricultural Science Bulletin,2020,36(19):39-43. |
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| Authors: | Bian Gengzhan Zhu Guangyu |
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| Institution: | ;1.Hunan Prospecting Designing and Research Central Institute for Forestry and Industry, Changsha 410000;2.Central South University of Forestry and Technology, Changsha 410000 |
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| Abstract: | To identify the crucial effects of spatial structure on understory shrub species diversity, the Quercus secondary forest in Badagong Mountain is studied. The spatial structure of forest stand is evaluated by calculating the size ratio, mixing degree, aggregation index and openness index, and the understory shrub species diversity is evaluated by calculating the Margalef index, Pielou index and Auclair index. The Pearson correlation coefficient analysis is adopted to explore the correlation between the indexes. The finding indicates that the openness and aggregation index of natural secondary forest of Quercus species in Badagongshan are two main factors relevant to the species diversity of undergrowth shrubs, a positive correlation can be found both between the openness index and Pielou index, and between the aggregation index and Auclair Goff index. With the increase of the openness index, Pielou index increases correspondingly, which means the species evenness of understory shrubs is increased. With the growth of Quercus species aggregation index, Auclair Goff index grows correspondingly, which implies the species of undergrowth shrubs is diversified. Therefore, to improve the species diversity of understory shrubs in natural secondary forest of Quercus species in Badagongshan, we should focus on adjusting the structure of tree species and the pattern distribution of forest space, especially from aspects of the tree openness and aggregation. |
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| Keywords: | spatial structure of forest species diversity underbrush shrubs simple correlation analysis |
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