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园艺学报 ›› 2015, Vol. 42 ›› Issue (9): 1815-1822.doi: 10.16420/j.issn.0513-353x.2014-1118

• 研究报告 • 上一篇    下一篇

紫斑牡丹两个异域亚种种群生命表分析

张庆雨,张延龙*,牛立新,张晓骁,司 冰   

  1. 西北农林科技大学风景园林艺术学院,陕西杨凌 712100
  • 出版日期:2015-09-25 发布日期:2015-09-25
  • 基金资助:
    国家林业公益性行业科研专项(201404701)

Life Table Analysis of Population Between Two Allopatric Subspecies of Paeonia rockii

ZHANG Qing-yu,ZHANG Yan-long*,NIU Li-xin,ZHANG Xiao-xiao,and SI Bing   

  1. College of Landscape Architecture and Arts,Northwest A & F University,and Yangling,Shaanxi 712100,China
  • Online:2015-09-25 Published:2015-09-25

摘要: 以陕西省子午岭东段铜川市境内的裂叶紫斑牡丹(Paeonia rockii ssp. atava)种群和秦岭中段宝鸡市境内的全缘叶紫斑牡丹(Paeonia rockii ssp. rockii)种群为调查对象,绘制其静态生命表、种群年龄结构图、存活曲线、死亡率曲线以及生殖力表,进行种群数量动态分析。结果表明:裂叶紫斑牡丹种群在3龄前和9 ~ 15龄之间分别经历了环境筛选和竞争自疏,11年为其生理寿命,30年左右为极限寿命,存活曲线表现为Deevey-Ⅰ型,种群表现为增长型。全缘叶紫斑牡丹种群在3龄前经历了强烈的环境筛选,3龄以后种群处于高死亡率状态,9年左右为其生理寿命,24年为极限寿命,存活曲线表现为Deevey-Ⅱ型,种群表现为衰退型。造成两种紫斑牡丹种群数量动态差异的可能原因是繁殖能力的差异、居群规模大小、种群适应性以及人为干扰等。

关键词: 紫斑牡丹, 种群, 生命表, 存活曲线

Abstract: Numeric dynamics of Paeonia rockii ssp. atava population in Tongchuan of Ziwu Mountains and Paeonia rockii ssp. rockii population in Baoji of Qinling Mountains,were studied using the static life table,the age structure of population,the curves of survival rate,the mortality rate and the fecundity schedule of population. It indicates that the P. rockii ssp. atava underwent environmental screening during its first 3 years and competitive self-thinning at the age between 9 to 15 years,the physiological life span of the species was about 11 years,and its maximum life span was about 30 years. The survival rate of P. rockii ssp. atava population exhibits as the Deevey-Ⅰtype,that population of the species belongs to the type of increase. However,the P. rockii ssp. Rockii underwent very strong environmental screening during its first 3 years and the death rate of population is very high after 3 years,the physiological life span of the species was about 9 years,and its maximum life span was about 24 years. The survival rate of P. rockii ssp. Rockii population exhibits as the Deevey-Ⅱ type,that population of the species belongs to the type of decline. The possible factors leading to the numeric dynamics differences of two allopatric subspecies of Paeonia rockii are it’s the reproductive capacity,the population size,theecological adaptability and the disturbances from human activities.

Key words: Paeonia rockii, population, life table, survival curve

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