云南苍山西坡常绿阔叶林木本植物幼苗存活和生长研究
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云南省基础研究计划项目(202001AU070021)资助


Seedling Survival and Growth of Woody Plants in Evergreen Broad-leaved Forest on the Western Slope of Cangshan Mountain in Yunnan
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    摘要:

    为探讨木本植物幼苗动态的影响因素,从功能性状多样性、系统发育多样性和环境过滤3个方面分析其对幼苗平均存活率和平均生长率的影响及其在不同幼苗密度样地间的动态变化。在云南苍山西坡4个不同幼苗密度的样地平台,设置了256个幼苗样方,收集了2020—2022年3年的幼苗数据并结合线性混合模型进行分析。结果表明,幼苗平均存活率受到功能性状多样性和系统发育多样性的影响,在低幼苗密度样地中功能性状多样性和系统发育多样性对幼苗平均存活具有显著正作用。幼苗平均生长率主要受到系统发育多样性和环境过滤的影响,在高幼苗密度样地中系统发育多样性呈显著负作用,低样方坡度和高土壤湿度是幼苗生长的关键因素。标准化系统发育多样性指数在低幼苗密度样地中较高,而功能分散性指数在高幼苗密度样地中较高。这为幼苗动态的理解和预测提供了新的视角和方法,也为森林的恢复和保护提供了实践指导。

    Abstract:

    In order to explore the factors influencing the seedling dynamics of woody plants, the effects of functional trait diversity, phylogenetic diversity and environmental filtering on the mean survival rate and mean growth rate of seedlings were analyzed, as well as their dynamic changes among plots with different seedling densities. In the west slope of Cangshan Mountain in Yunnan Province, there were 256 seedling quadrats set up in four plots with different seedling densities. The seedling data from 2020 to 2022 were collected and analyzed with a linear mixed model. The results showed that the average survival rate of seedlings was affected by functional trait diversity and phylogenetic diversity, and functional trait diversity and phylogenetic diversity had significant positive effects on the average survival rate of seedlings in low seedling density plots. The average growth rate of seedlings was mainly affected by phylogenetic diversity and environmental filtration, and the phylogenetic diversity had a significant negative effect in high seedling density plots. Low quadrat slope and high soil moisture were the key factors for seedling growth. The standardized phylogenetic diversity index was high in the plots with low seedling density, while the functional dispersion index was high in the plots with high seedling density. So, these would provide a new perspective and method for understanding and predicting seedling dynamics, and also provides practical guidance for forest restoration and protection.

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冯哲,于小莉,孙继文,王丽萍,陈凤仙,胡小康,乌俊杰.云南苍山西坡常绿阔叶林木本植物幼苗存活和生长研究[J].热带亚热带植物学报,2025,33(2):167~176

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  • 收稿日期:2023-11-06
  • 最后修改日期:2024-01-23
  • 在线发布日期: 2025-04-03
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