| 广西凭祥不同年龄红椎林林下植物物种多样性及其环境解释 |
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| 引用本文： | 尤业明,徐佳玉,蔡道雄,刘世荣,朱宏光,温远光.广西凭祥不同年龄红椎林林下植物物种多样性及其环境解释[J].生态学报,2016,36(1):164-172. |
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| 作者姓名： | 尤业明 徐佳玉 蔡道雄 刘世荣 朱宏光 温远光 |
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| 作者单位： | 广西大学林学院, 亚热带农业生物资源保护与利用国家重点实验室, 南宁 530004;广西大学林学院, 广西高校林业科学与工程重点实验室, 南宁 530004,广西大学林学院, 亚热带农业生物资源保护与利用国家重点实验室, 南宁 530004;广西大学林学院, 广西高校林业科学与工程重点实验室, 南宁 530004,中国林业科学研究院热带林业实验中心, 凭祥 532600,中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091,广西大学林学院, 亚热带农业生物资源保护与利用国家重点实验室, 南宁 530004;广西大学林学院, 广西高校林业科学与工程重点实验室, 南宁 530004,广西大学林学院, 亚热带农业生物资源保护与利用国家重点实验室, 南宁 530004;广西大学林学院, 广西高校林业科学与工程重点实验室, 南宁 530004 |
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| 基金项目： | 国家科技支撑计划(2012BAD22B01);国家自然科学基金项目(31460121);广西重大专项计划(1222005) |
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| 摘 要： | 林下植被作为森林生态系统的重要组成部分,其在调控森林群落结构和功能上发挥着至关重要的作用。从揭示人工林林下植物物种组成的关键控制因素的目标出发,以不同年龄红椎林灌木层和草本层的植物群落作为研究对象,采用野外调查和室内分析相结合的方法,重点探究林下植物物种组成与环境因子之间的关系及其关键控制因子。研究结果表明:不同年龄红椎林的林下植物物种组成存在明显差异;RDA结果表明,胸高断面积是影响灌木层物种组成的最主要因子,胸高断面积、坡度和海拔能显著影响影响草本层的物种组成;方差分解结果表明,所调查的生物和非生物因子分别解释灌木层和草本层物种组成变异的63%和47%,微环境和植物之间的相互作用是影响林下植物群落物种变异的最主要因素,而土壤与微环境、土壤与植物两者之间,以及微环境、植物和土壤三者之间的相互作用对林下植物群落的物种组成的影响较小,甚至无影响,微环境的独立效应对林下植物物种组成的影响高于植物或土壤因素。
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| 关 键 词： | 物种多样性 人工林 年龄 冗余分析(RDA) 方差分解 南亚热带 |
| 收稿时间： | 2014/11/24 0:00:00 |
| 修稿时间： | 2015/4/29 0:00:00 |
Environmental factors affecting plant species diversity of understory plant communities in a Castanopsis hystrix plantation chronosequence in Pingxiang, Guangxi, China |
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| YOU Yeming,XU Jiayu,CAI Daoxiong,LIU Shirong,ZHU Hongguang and WEN Yuanguang.Environmental factors affecting plant species diversity of understory plant communities in a Castanopsis hystrix plantation chronosequence in Pingxiang, Guangxi, China[J].Acta Ecologica Sinica,2016,36(1):164-172. |
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| Authors: | YOU Yeming XU Jiayu CAI Daoxiong LIU Shirong ZHU Hongguang and WEN Yuanguang |
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| Institution: | State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Forestry, Guangxi University, Nanning 530004, China;Guangxi Colleges and Universities Key Laboratory of Forestry Science and Engineering, College of Forestry, Guangxi University, Nanning 530004, China,State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Forestry, Guangxi University, Nanning 530004, China;Guangxi Colleges and Universities Key Laboratory of Forestry Science and Engineering, College of Forestry, Guangxi University, Nanning 530004, China,Experiment Center of Tropical Forestry, Chinese Academy of Forestry, Pingxiang 532600, China,State Forestry Administration, Key Laboratory of Forest Ecology and Environment, Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China,State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Forestry, Guangxi University, Nanning 530004, China;Guangxi Colleges and Universities Key Laboratory of Forestry Science and Engineering, College of Forestry, Guangxi University, Nanning 530004, China and State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Forestry, Guangxi University, Nanning 530004, China;Guangxi Colleges and Universities Key Laboratory of Forestry Science and Engineering, College of Forestry, Guangxi University, Nanning 530004, China |
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| Abstract: | Understory plant communities are important components of forest ecosystems, and play a crucial role in the regulation of community structures and functions. The present study focused on the key controlling factors of the species composition of understory plants in a Castanopsis hystrix plantation chronosequence by combining field investigation and laboratory analysis. The objectives were to determine the relationship between understory plant species composition and environmental factors, and their key controlling factors. The results showed significant variations in the plant species composition of shrub and herb layers among stand age classes in the Castanopsis hystrix forest (P<0.05). Redundancy analysis suggested that basal area was the most important factor determining the shrub layer plant distribution, and basal area, slope, and elevation were the most important factors determining herb layer plant species compositions. Variation partitioning analysis revealed that the two categories of factors, i.e. biotic and abiotic factors, explained 63% and 47% of the variation in the shrub and herb layer species composition, respectively. The shared effect of the microenvironment and plant factors (i.e. slope, elevation and basal area) was the most important combined factor determining understory plant distribution. However, the shared effects of other combination of factors were insignificant. The effect of microenvironmental factors was more important than the effect of soil or plants in determining understory plant distribution in the present study sites. |
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| Keywords: | species diversity plantation stand age redundancy analysis (RDA) variation partitioning south subtropics |
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