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| 广州增城腊田埔翻白叶树林群落分析 |
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吴林芳,黄明钗,马磊,叶华谷,曾飞燕,曹洪麟
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中国科学院华南植物园,华南植物园,华南植物园,华南植物园,华南植物园,中国科学院华南植物园
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| 摘要: |
| 风水林作为生境缺失和破碎化的产物，对保护区域生物多样性资源具有重要意义。广州增城腊田埔的风水林以翻白叶树（Pterospermum heterophyllum）为建群种。文章首次对分布于广州南亚热带低丘平地的翻白叶树林进行了群落特征研究，结果表明，群落组成种类复杂，1 200 m2样带内有维管植物41科62属80种，种子植物属的区系属性以热带亚热带区系成分为主，体现出群落由热带向亚热带过渡的性质；群落结构较复杂，分层现象不明显，冠层树冠不连续，DBH≥20 cm的大径级个体较多，形成群落极大的胸高断面积，达66.13 m2?hm-2；群落生物多样性分析表明，该群落乔木层的Shannon Wiener指数为4.655 7，符合南亚热带常绿阔叶林的指数范围；基于样带面积统计的建群种种群年龄结构分析表明，群落建群种属稳定进展种群，该群落将保持相当长的稳定性。 |
| 关键词: 广州〓翻白叶树〓风水林〓群落特征 |
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| 基金项目:广州地区自然保护小区乡村风水林现状及地带性植被恢复研究项目。 |
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| The Study of Communities Characteristics about the Pterospermum \=heterophyllum at Latianpu, Zengcheng, Guangzhou\ |
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Wu Lin-fang,Huang Ming-chai,Ma Lei,Ye Hua-gu,Zeng Fei-yan and Cao Hong-lin
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South China Botanical Garden, The Chinese Academy of Sciences,
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| Abstract: |
| As the product of habitat loss and fragmentation, Fengshui woods play an important role in the protection of regional biodiversity resources. Pterospermum heterophyllum is the constructive species of the Fengshui woods in Latianpu, Zengcheng, Guangzhou. The populations of this species are usually small in field conditions, often as the associated species or rare species in the communities. This article studied on P. heterophyllum for the first time, which distributed in the south subtropical hilly plains, located in Guangzhou. The results revealed that the composition of P. heterophyllum community in Guangzhou was very complex. Within 1 200 m2 transect, the community showed a total of 80 vascular species from 62 genera distributed in 41 families. The flora property of seed plants was mainly composed by tropical subtropical flora, which reflected the transition characteristics from the tropical to subtropical of the communities. The structure of this community was more complex, stratification is not obvious, with discontinuous canopy. The individuals which DBH≥20 cm class accounted for most of this community, leading to very large basal area, up to 66.13 m2?hm-2. Community biodiversity analysis revealed that Shannon Wiener index of tree layer in this community is 4.655 7, within the range of south tropical ever green broad leaved forest index. Based on the transect area of age structure of dominant species, statistical analysis showed that the constructive species population of this community were in progressive succession, with greater stability. |
| Key words: Guangzhou, Pterospermum heterophyllum, Fengshui wood, community characteristics |
