| 濒危植物宝华玉兰种内与种间竞争 |
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| 引用本文： | 蒋国梅,孙国,张光富,王剑伟.濒危植物宝华玉兰种内与种间竞争[J].生态学杂志,2010,29(2):201. |
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| 作者姓名： | 蒋国梅 孙国 张光富 王剑伟 |
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| 作者单位： | 南京师范大学生命科学学院,江苏省生物多样性与生物技术重点实验室,南京,210046 |
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| 基金项目： | 国家自然科学基金项目(30370003); 江苏省普通高校自然科学研究计划资助项目(08KJB180005) |
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| 摘 要： | 利用Hegyi单木竞争指数模型对江苏镇江宝华山国家森林公园特有濒危植物宝华玉兰种内、种间竞争强度进行定量分析。结果表明:宝华玉兰竞争压力主要来自种间,占总竞争的90.7%。宝华玉兰种内竞争、种间竞争强度大小顺序为:紫楠>野核桃>建始槭>宝华玉兰种内>毛竹>化香>枫香>皂荚>朴树。整个林分竞争木对对象木的竞争强度与对象木的胸径大小近似服从幂函数关系,而伴生树种竞争木对对象木的竞争强度与对象木的胸径大小近似服从对数函数关系。种间竞争强度和对象木的胸径大小呈显著负相关。利用模型预测,当宝华玉兰的胸径达到30cm后,竞争强度几乎没有变化。研究认为,将无性系分株换算为一株与其胸高断面积之和相等的个体更为合理。
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| 关 键 词： | 宝华玉兰 种内竞争 种间竞争 竞争指数 |
Intra-and interspecific competition of endangered plant Magnolia zenii |
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| JIANG Guo-mei,SUN Guo,ZHANG Guang-fu,WANG Jian-wei.Intra-and interspecific competition of endangered plant Magnolia zenii[J].Chinese Journal of Ecology,2010,29(2):201. |
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| Authors: | JIANG Guo-mei SUN Guo ZHANG Guang-fu WANG Jian-wei |
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| Affiliation: | JIANG Guo-mei,SUN Guo,ZHANG Guang-fu,WANG Jian-wei (School of Life Sciences,Nanjing Normal University,Jiangsu Key Laboratory of Biodiversity , Biotechnology,Nanjing 210046,China). |
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| Abstract: | By using Hegyi's single-tree competition index model,the intra-and interspecific competition intensities of endemic and endangered plant Magnolia zenii from Baohuashan National Forest Park in Zhenjiang City of Jiangsu Province were quantitatively analyzed,with the methods suitable for treating the surveyed data of clonal ramet discussed. The main competitive stress to the M. zenii population came from interspecific competition,which accounted for 90.7% of the total. The competition intensity of interspecifi... |
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| Keywords: | Magnolia zenii intraspecific competition interspecific competition competition index |
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