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植物研究 ›› 2011, Vol. 31 ›› Issue (4): 443-450.doi: 10.7525/j.issn.1673-5102.2011.04.011

• 论文 • 上一篇    下一篇

生境破碎化后濒危植物缙云卫矛种群的数量动态

林永慧1;何兴兵1;田启建1;胡文勇1;陈玲1;何平2   

  1. 1.吉首大学生物资源与环境科学学院,吉首 416000;2.西南大学生命科学学院,重庆,400715
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-07-20 发布日期:2011-07-20
  • 通讯作者: 林永慧
  • 基金资助:
     

Numeric Dynamics of Endangered Plant Euonymus chloranthoides Populations after Habitat Fragmentation

LIN Yong-Hui;HE Xing-Bing;TIAN Qi-Jian;HU Wen-Yong;CHEN Ling;HE Ping   

  1. 1.College of Biology and Environmental Sciences,Jishou University,Jishou 416000;2.School of Life Science,Southwest University,Chongqing 400715
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-07-20 Published:2011-07-20
  • Contact: LIN Yong-Hui1
  • Supported by:
     

摘要: 运用种群静态生命表、生殖力表和Leslie矩阵模型,研究了重庆特有濒危植物缙云卫矛在北温泉、鸡公山和东温泉3个片断生境中种群的数量动态。静态生命表结果显示3个种群的最大龄级分别为14、13、9龄;相对于其它两个种群,北温泉种群表现出数量较多的幼苗,但同时该样地幼苗种群表现出较高的种群消失率(Kx)。种群生殖力表显示3个种群的净增殖率(R0)均大于1,内禀增长率(rm)均大于0,表明缙云卫矛种群可以完成自我更新,种群表现出正增长。Leslie矩阵模型对缙云卫矛种群进行的数量预测结果显示缙云卫矛3个种群20年后均表现出数量的增长,这与生殖力表显示的结果一致。缙云卫矛的濒危可能是其生境破碎化引起的。

关键词: 缙云卫矛, 濒危植物, Leslie矩阵, 种群动态

Abstract: Numeric dynamics of endangered plant Euonymus chloranthoides populations, only distributed in Chongqing, China, in the fragmented habitats including Beiwenquan, Jigongshan and Dongwenquan were analyzed in this study using static life table, fecundity schedule and Leslie’s matrix model. Static life table showed that the maximum age classes of plant individual in these three populations were 14, 13 and 9, respectively. Compared with the other two populations, Beiwenquan population had much more seedlings, but seedling population had higher disappearance rate (Kx). Fecundity schedule showed that the net reproductive rates (R0) were higher than 1, and the intrinsic rates of increase (rm) were higher than 0, indicating E.chloranthoides population could accomplish self-regeneration and was expanding. Numeric dynamics of E.chloranthoides population was predicted using Leslie’s matrix model. The result showed that the number of these three populations exhibited increasing trend in the future 20 years, which was consistent with the result of fecundity schedule. The endangering of E.chloranthoides was probably resulted from habitat fragmentation.

Key words: Euonymus chloranthoides, endangered plant, Leslie&rsquo, s matrix, population dynamics

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