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贵州雷公山自然保护区秃杉天然种群生命表

冯金朝;袁飞;徐刚   

  1. 中央民族大学生命与环境科学学院, 北京 100081
  • 收稿日期:2008-10-28 修回日期:1900-01-01 出版日期:2009-07-10 发布日期:2009-07-10

Life table of natural Taiwania flousiana population in Leigong Mountain Nature Reserve of Guizhou Province.

FENG Jin-chao;YUAN Fei;XU Gang   

  1. College of Life and Environmental Sciences, Central University of Nationalities, Beijing 100081, China
  • Received:2008-10-28 Revised:1900-01-01 Online:2009-07-10 Published:2009-07-10

摘要: 运用相邻格子法,对雷公山秃杉种群进行生态学调查,采用空间代替时间的方法,编制秃杉种群的生命表。结果表明:秃杉种群结构存在波动性, 成年阶段的个体较丰富, 种群趋于Deevey Ⅱ型;秃杉种群死亡率和消失率曲线变化趋势基本一致, 均出现2个高峰, 一个出现在第6龄级阶段, 另一个出现在第12龄级阶段;秃杉种群的生存率单调下降, 累计死亡率单调上升, 生存率下降趋势前期高于后期, 累计死亡率则相反;生存函数曲线表明,秃杉具有中期稳定和后期衰退的特点。

关键词: 红树林, 生物量, 净初级生产力

Abstract: An ecological investigation was made on the natural Taiwania flousiana population in Leigong Mountain of Guizhou Province by using checkerboard frame method, and the life table of the population was established by the method of spatial series substituting for time series. There was a fluctuation in the structure of T. flousiana population. The individuals at adult stage were abundant, and the survival curve of the population trended to the type of Deevey Ⅱ. The mortality rate curve and the disappearance rate curve in the lifespan had the similar variation trend, with the peaks in 6th and 12th age class periods. The survival rate of the population decreased monotonically, whereas the cumulative mortality rate was in adverse. Four survival functional curves showed that T. flousiana population grew stably in middle age period but declined in old age period.

Key words: Mangrove, Biomass, Net primary productivity