| 引用本文： |
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覃俏梅,梅启明,吴林芳,曹洪麟,王锋.广东江门古兜山保护区光叶红豆种群径级结构与空间分布格局[J].广西科学院学报,2023,39(4):426-432. [点击复制]
- QIN Qiaomei,MEI Qiming,WU Linfang,CAO Honglin,WANG Feng.Diameter Structure and Spatial Distribution Pattern of Ormosia glaberrima Population in Gudushan Reserve,Jiangmen,Guangdong[J].Journal of Guangxi Academy of Sciences,2023,39(4):426-432. [点击复制]
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| 摘要: |
| 为了解广东江门古兜山省级自然保护区内天然分布的珍稀濒危植物光叶红豆Ormosia glaberrima 种群的生存现状，本研究基于1 hm2固定样地数据进行光叶红豆种群径级结构分析，并采用点格局分析方法研究种群空间分布格局。结果表明，光叶红豆的径级结构呈倒“J”型，个体以幼树为主，同时幼树和壮龄树死亡率也较高，随着径级增大，个体的存活率趋于稳定，整体表现为增长型，种群结构较为稳定；在小空间尺度上，光叶红豆个体间呈聚集分布，而随着空间尺度的增大，个体倾向于随机分布。光叶红豆幼树呈聚集分布，随着径级增加，空间分布的聚集程度下降，成树呈随机分布。因此，古兜山光叶红豆种群的空间分布格局主要受幼树、壮龄树死亡率较高和密度影响，建议通过适度开辟林窗等方式加强就地保护，结合迁地保护降低幼树密度，促进光叶红豆种群更新。 |
| 关键词: 珍稀濒危植物 光叶红豆 径级结构 空间分布格局 就地保护 迁地保护 |
| DOI：10.13657/j.cnki.gxkxyxb.20231226.009 |
| 投稿时间：2023-11-01修订日期：2023-12-14 |
| 基金项目:2023年度广东省自然资源事务专项(生态林业建设项目)资助。 |
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| Diameter Structure and Spatial Distribution Pattern of Ormosia glaberrima Population in Gudushan Reserve,Jiangmen,Guangdong |
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QIN Qiaomei1, MEI Qiming2, WU Linfang2, CAO Honglin3, WANG Feng4
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| (1.Guangdong Eco-Engineering Polytechnic, Guangzhou, Guangdong, 510520, China;2.Guangzhou Linfang Ecology Co., Ltd., Guangzhou, Guangdong, 510520, China;3.South China Botanical Garden, CAS, Guangzhou, Guangdong, 510650, China;4.Deqing Forest Farm, Guangdong Province, Zhaoqing, Guangdong, 526600, China) |
| Abstract: |
| In order to understand the survival status of the rare and endangered plant Ormosia glaberrima population in Gudoushan Provincial Nature Reserve in Guangdong Province,this study analyzed the population size structure based on the data of 1 hm2 forest plot,and used the point pattern analysis method to study the spatial distribution pattern of the population.The results demonstrated that the size structure of O. glaberrima was an inverted “J” shape,and the individuals were mainly saplings.In addition,the mortality rates of saplings and middle-age trees were higher in comparison with adults,and the survival rate of individuals tended to be stable with the increase of diameter class,the overall age structure was growth-type and the population structure was stable.On the small spatial scale,the O. glaberrima individuals were spatilly clustered,and with the increase of spatial scale,individuals tended to be randomly distributed.The saplings of O. glaberrima were clustered,and with the increase of diameter class,the degree of aggregation decreased,and the adult trees were randomly distributed.Therefore,the spatial distribution pattern of the O. glaberrima population in Gudoushan was mainly affected by the high mortality rate and the negative density dependence of saplings and middle-age trees.It was suggested to strengthen in situ conservation by appropriately create forest gaps,and reduce the density of saplings in combination with ex situ conservation,so as to promote the population regeneration of O. glaberrima. |
| Key words: rare and endangered plant Ormosia glaberrima size structure spatial distribution pattern in situ protection ex situ protection |
