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| 濒危植物单性木兰种群径级结构和生命表分析 |
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张启伟1, 林燕芳1, 覃文更2, 韦国富2, 刘燕华3, 唐绍清1*
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1. 广西师范大学 生命科学学院 珍稀濒危动植物生态与环境保护省部共建教育部重点实验室, 广西 桂林 541004;2. 广西木论国家级自然保护区管理局, 广西 环江 547100;3. 广西师范大学附属中学, 广西 桂林 541001
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| 摘要: |
| 单性木兰是我国特有的濒危植物。对广西北部木论自然保护区内的单性木兰代表种群进行调查,分析其种群径级结构和存活曲线,编制了静态生命表。结果表明:雄株与雌株的比例约1.06:1,幼苗和幼树在种群中占有较大的比重,单性木兰种群的径级结构呈非典型的金字塔型分布,为稳定型种群; 存活曲线接近Deevey-Ⅲ型,种群在两个低龄级Ⅰ和Ⅲ出现相对较高的死亡高峰,死亡率分别为0.23和0.35,而高径级趋于稳定。 |
| 关键词: 单性木兰 种群 径级结构 静态生命表 |
| DOI：10.3969/j.issn.1000-3142.2013.03.002 |
| 分类号:Q948.121 |
| Fund project: |
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| Population size structure and life table of endangered plant Woonyoungia septentrionalis |
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ZHANG Qi-Wei1, LIN Yan-Fang1, QIN Wen-Geng2, WEI Guo-Fu2,
LIU Yan-Hua3, TANG Shao-Qing1*
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1. Key Laboratory for Ecology of Rare and Endangered Species and Environmental Protection Co-established by Guangxi and
the Ministry of Education, College of Life Sciences, Guangxi Normal University, Guilin 541004, China;2. Mulun Nature Reserve
Management Bureau, Huanjiang 54710, China;3. High School Affiliated to Guangxi Normal University, Guilin 541001, China
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| Abstract: |
| Woonyoungia septentrionalis(Magnolianceae)is an endangered plant species endemic to China. The size structure,static life table and survival curve of W.septentrionalis population were analyzed,based on the field investigation data of the representative population in Mulun National Nature Reserve of Guangxi. The ratio of male to female individuals was 1.06︰1. The size structure was a atypical pyramid-like form,suggesting that the population was stable. The survival curve could be described by Deevey-Ⅲ. The population had two distinct peaks of mortality in age Ⅰ(qx=0.23)and Ⅲ(qx=0.35),but the adult age class was stable. |
| Key words: Woonyoungia septentrionalis population age structure static life table |
