| 雪灾后粤北山地常绿阔叶林优势树种幼苗更新动态 |
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| 引用本文： | 区余端,苏志尧,解丹丹,柯娴氡,李镇魁.雪灾后粤北山地常绿阔叶林优势树种幼苗更新动态[J].生态学报,2011,31(10):2708-2715. |
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| 作者姓名： | 区余端 苏志尧 解丹丹 柯娴氡 李镇魁 |
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| 作者单位： | 1. 华南农业大学林学院,广东广州,510642;华南农业大学农业部生态农业重点开放实验室,广东广州,510642
2. 华南农业大学林学院,广东广州,510642 |
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| 基金项目： | 广东省2009年度"森林生态科技研究和推广"项目; 广东省科技计划项目(2008A020100013) |
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| 摘 要： | 对遭受2008年雪灾破坏的车八岭山地常绿阔叶林进行连续3 a(2008-2010年)的监测,研究在冠层恢复过程中优势树种的林下幼苗动态,旨在了解幼苗灾后的更新规律及其对冠层结构变化(以叶面积指数LAI的变化来表示)的响应。结果表明,12个优势种的林下幼苗对冠层恢复有明显的响应。非参数的多元方差分析(perMANOVA)显示,优势种幼苗的组成和分布存在着极显著的年际差异(P<0.001);其中2008年与2009年及2010年的差异均极显著(P<0.001);2009年与2010年的差异不显著。这与冠层LAI的变化情况相应:2008年LAI最低,2009年LAI值迅速增加;2010与2009年相比LAI增长缓慢,并逐渐趋于稳定。不同的优势树种幼苗对样方中LAI变化的响应不同,阳性树种幼苗的相对多度和频度一般会随林分郁闭度的增加而锐减,阴性及耐阴树种幼苗数量则随冠层恢复而增加。随着冠层恢复,林下指示种截然变化。2008年的林下幼苗指示种为8个喜光的种类,而2010年则仅见较耐阴的香楠Randia canthioides 为指示种。指示种分析从另一个角度反映了幼苗对冠层恢复的响应。
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| 关 键 词： | 雪灾 自然干扰 幼苗动态 叶面积指数 非参数的多元方差分析 |
| 收稿时间： | 2010/10/27 0:00:00 |
| 修稿时间： | 3/7/2011 12:00:00 AM |
Dynamics ofdominant tree seedlings in montane evergreen broadleaved forest following a snow disaster in North Guangdong |
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| OU Yuduan,SU Zhiyao,XIE Dandan,KE Xiandong and LI Zhenkui.Dynamics ofdominant tree seedlings in montane evergreen broadleaved forest following a snow disaster in North Guangdong[J].Acta Ecologica Sinica,2011,31(10):2708-2715. |
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| Authors: | OU Yuduan SU Zhiyao XIE Dandan KE Xiandong and LI Zhenkui |
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| Institution: | College of Forestry, South China Agricultural University, Guangzhou 510642, China;Key Laboratory of Ecological Agriculture of Ministry of Agriculture of the People's Republic of China, Guangzhou 510642, China;College of Forestry, South China Agricultural University, Guangzhou 510642, China;Key Laboratory of Ecological Agriculture of Ministry of Agriculture of the People's Republic of China, Guangzhou 510642, China;College of Forestry, South China Agricultural University, Guangzhou 510642, China;Key Laboratory of Ecological Agriculture of Ministry of Agriculture of the People's Republic of China, Guangzhou 510642, China;College of Forestry, South China Agricultural University, Guangzhou 510642, China;Key Laboratory of Ecological Agriculture of Ministry of Agriculture of the People's Republic of China, Guangzhou 510642, China;College of Forestry, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | Effects of a snowstorm on forest disturbance and the canopy changes caused by forest rehabilitation resulted in changes in tree seedling composition.The species and number of tree seedlings vary with the canopy-density dynamics and are embodied in the future species composition and structure of tree layer.With the aim of revealing the seedling regeneration pattern and its response to canopy changes(as indicated by changes in leaf area index \),a 3-year investigation from 2008 to 2010 was undertaken in Cheba... |
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| Keywords: | snowstorm natural disturbance seedling dynamics leaf area index permutation MANOVA |
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