| 喀斯特常绿落叶阔叶混交林木本植物幼苗组成及其年际动态 |
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| 引用本文： | 杨廷丽,安明态,张广奇,戚玉娇.喀斯特常绿落叶阔叶混交林木本植物幼苗组成及其年际动态[J].北京林业大学学报,2022,44(4):24-35. |
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| 作者姓名： | 杨廷丽 安明态 张广奇 戚玉娇 |
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| 作者单位： | 贵州大学林学院，贵州 贵阳 550025 |
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| 基金项目： | 国家自然科学基金项目（32060266、31700385）；;贵州省科技计划项目（黔科合基础[2020]1Y124）； |
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| 摘 要： | 目的]研究幼苗更新动态,为揭示群落更新机制和植被斑块分布格局提供理论依据.方法]依托于茂兰国家级自然保护区喀斯特常绿落叶阔叶混交林1.28 hm2固定样地,对样地内128个1 m×1 m样方中胸径<1 cm的木本植物幼苗进行连续3年调查,分析了该森林群落中木本植物幼苗的种类、数量、萌发和死亡特征,探究了主要树种幼苗...
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| 关 键 词： | 喀斯特森林 物种组成 幼苗分布 年际动态 |
| 收稿时间： | 2021-01-20 |
Seedling composition and its interannual dynamics of woody plants in karst evergreen deciduous broadleaved mixed forest |
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| Yang Tingli,An Mingtai,Zhang Guangqi,Qi Yujiao.Seedling composition and its interannual dynamics of woody plants in karst evergreen deciduous broadleaved mixed forest[J].Journal of Beijing Forestry University,2022,44(4):24-35. |
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| Authors: | Yang Tingli An Mingtai Zhang Guangqi Qi Yujiao |
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| Institution: | College of Forestry, Guizhou University, Guiyang 550025, Guizhou, China |
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| Abstract: | Objective The study of seedling regeneration is of great significance to reveal the mechanism of community regeneration and the distribution pattern of vegetation patches. Method Based on the 1.28 ha fixed sample plot of karst evergreen deciduous broadleaved mixed forest in Maolan National Nature Reserve of southwestern China, the seedlings with DBH < 1 cm in 128 sample plots (1 m × 1 m) were investigated for three years. We analyzed the species, quantity, germination and death characteristics of woody plant seedlings in the forest community, and explored the annual distribution pattern of seedlings of main tree species. Result (1) There were significant differences in the number and species composition of woody plant seedlings between different years. A total of 971 seedlings (8 plant/m2) were found in 2017, belonging to 55 families, 96 genera and 121 species; 767 seedlings (6 plant/m2) were found in 2018, belonging to 40 families, 66 genera and 78 species; and 1 342 seedlings (10 plant/m2) were found in 2019, belonging to 39 families, 70 genera and 87 species. Among them, the woody vine seedlings were important components of seedlings under the forest. (2) Main tree species composition of seedlings under forest was similar to that of main tree species in the sample plot, and also maintained the dominant position under the forest. (3) The number of individuals and species of woody plant seedlings showed a partial peak at the height classes, which reached the highest at the 10?20 cm height classes and then decreased gradually, indicating that there was a certain negative density dependence on the seedlings. (4) The number of individuals and species of woody plant seedlings increased with the increase of elevation and slope, and the density of woody plant seedlings showed a complex patch distribution. Conclusion There are abundant species of woody plant seedlings under Maolan karst evergreen deciduous broadleaved mixed forest, showing complex patch distribution in space, and there is a certain negative density restriction effect due to the significant influence of altitude and slope. The long-term monitoring of seedlings will help us to understand the process of community renewal more accurately, and provide a basis for the rational protection and scientific management of karst forest in the future. |
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