Population quantity and structure dynamics of plant population of Picea schrenkiana

SONG Yuyang, ZHAO Ziyu,YANG Zhenan,ZHANG Wenhui*

Journal of Nanjing Forestry University (Natural Sciences Edition) ›› 2009, Vol. 33 ›› Issue (01) : 64-68.

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Journal of Nanjing Forestry University (Natural Sciences Edition) ›› 2009, Vol. 33 ›› Issue (01) : 64-68. DOI: 10.3969/j.jssn.1000-2006.2009.01.013

Population quantity and structure dynamics of plant population of Picea schrenkiana

  • SONG Yuyang1, ZHAO Ziyu2,YANG Zhenan3,ZHANG Wenhui3*
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Abstract

Investigation and statistical analysis were conducted on 15 plots (25m×25m) of Picea schrenkiana, which were arranged on Tianshan Mountains. We studied their age structures and static life tables. The population dynamics were predicted using time sequence model. The analysis of age structure of P. schrenkiana populations showed that all populations were fluctuated in upside down “J” shapes, with most individuals (82.70%) concentrated in the 0—40 year age class. Young individuals were dramatically abundant. By contrast, there were few middle and old individuals. The analysis of life table, the curves of lose rate, survival rate, mortality rate and survival function of the population showed that the population had a peak of mortality at Ⅱ age class, and survival curve of the population was between DeeveyⅡand DeeveyⅢ. The functions used in static life table could explain the structure and dynamic of P. schrenkiana population well. Time sequence models predicted that young individuals would be relative rich, and population structure would be stable after 20,40,60,80,100,140 years in the future.

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SONG Yuyang, ZHAO Ziyu,YANG Zhenan,ZHANG Wenhui*. Population quantity and structure dynamics of plant population of Picea schrenkiana[J]. Journal of Nanjing Forestry University (Natural Sciences Edition). 2009, 33(01): 64-68 https://doi.org/10.3969/j.jssn.1000-2006.2009.01.013

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