广西桉树人工林林下植物的物种和谱系多样性及其影响因素

彭杏冰; 胡刚; 任世奇; 胡聪; 徐超昊; 黄侩侩; 庞庆玲; 张忠华

doi:10.11913/PSJ.2095-0837.2022.60771

广西桉树人工林林下植物的物种和谱系多样性及其影响因素

1. 南宁师范大学环境与生命科学学院, 南宁 530100;
2. 广西壮族自治区林业科学研究院, 南宁 530002

基金项目:

广西自然科学基金(2021GXNSFFA196005,2021GXNSFAA196024)

广西创新驱动发展专项(AA17204087-9)

国家自然科学基金(31960275,31760128)。

详细信息

作者简介:
彭杏冰(1996-)，女，硕士研究生，研究方向为桉树人工林生态环境效应(E-mail: pxb2592496202@com)。

通讯作者:
张忠华,E-mail: gxtczzh@com

中图分类号: Q948.1
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- 文章访问数: 141
- HTML全文浏览量: 21
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出版历程
- 收稿日期: 2022-06-15
- 修回日期: 2022-08-05
- 网络出版日期: 2023-01-12

Species and phylogenetic diversity of the understory and influencing factors in Eucalyptus plantations in Guangxi, south China

1. College of Environmental and Life Sciences, Nanning Normal University, Nanning 530100, China;
2. Guangxi Forestry Research Institute, Nanning 530002, China

Funds:

This work was supported by grants from the Guangxi Natural Science Foundation (2021GXNSFFA196005, 2021GXNSFAA196024), Guangxi Innovation-driven Development Special Project (AA17204087-9), and National Natural Science Foundation of China (319602753, 1760128).

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摘要

摘要: 本研究对广西桂林、南宁和北海的桉树(Eucalyptus)人工林开展样地调查和环境因子测定，对3个地区桉树人工林林下灌木层和草本层植物的物种和谱系多样性格局及其影响因素进行分析。结果显示，从桂林、南宁到北海，桉树人工林灌木层和草本层物种α多样指数多呈增加趋势。其中灌木层的物种α多样性表现为桂林显著小于北海；草本层的Pielou均匀度指数表现为桂林显著小于北海；南宁的草本层Patrick指数显著小于北海和桂林；南宁和北海间灌木层和草本层物种均最为相似，而桂林与北海间草本层物种组成的差异最大； 3个地区的灌木层谱系α多样性无显著变化，而南宁草本层的谱系α多样性显著低于桂林。除了北海灌木层的平均谱系距离(MPD)与桂林和南宁存在显著差异外，3地间灌木层最近种间平均谱系距离(MNTD)以及草本层的MPD和MNTD均无显著差异。研究结果说明广西桉树人工林林下植物的物种和谱系多样性主要受坡度、土壤总磷、海拔等因素的影响。
- 桉树人工林 /
- 林下植物 /
- 物种多样性 /
- 谱系多样性 /
- 广西
Abstract: In this study, site surveys and environmental factor analyses were carried out on Eucalyptus plantations in Guilin, Nanning, and Beihai in Guangxi. Species and phylogenetic α- and β-diversity patterns of the shrub and herbaceous layers of the Eucalyptus plantation understories and their influencing factors were analyzed in the three regions. Results showed that species α-diversity of the shrub and herbaceous layers in the Eucalyptus plantations tended to increase from Guilin, Nanning, to Beihai. Species α-diversity indices of the shrub layer, including Shannon-Wiener, Simpson, and Patrick richness indices, were significantly smaller in Guilin than in Beihai, while the Pielou evenness index of the herb layer was significantly smaller in Guilin than in Beihai. Species β-diversity analysis showed that the shrub and herb layer species between Nanning and Beihai were the most similar, while herb layer species composition between Guilin and Beihai was the most different. Further analysis showed that phylogenetic α-diversity of the shrub layers gradually increased, while that of the herb layers first decreased and then increased. The mean phylogenetic distance (MPD) and mean nearest taxon distance (MNTD) of the shrub layer and the MNTD of the herb layer showed a single peak pattern. Redundancy analysis indicated that species and phylogenetic diversities of the Eucalyptus plantation understories in Guangxi were mainly influenced by slope degree, soil total phosphorus, and elevation. These results help to reveal the patterns of plant diversity and influencing factors of Eucalyptus plantations in Guangxi, providing a reference for scientific research and management.
- Eucalyptus plantation /
- Understory plants /
- Species diversity /
- Phylogenetic diversity /
- Guangxi

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