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天山云杉种群数量动态研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2009年01期
Page:
64-68
Column:
研究论文
publishdate:
2009-01-30

Article Info:/Info

Title:
Population quantity and structure dynamics of plant population of Picea schrenkiana
Author(s):
SONG Yuyang1 ZHAO Ziyu2YANG Zhenan3ZHANG Wenhui3*
1.College of Agriculture, Shihezi University, Shihezi 832003, China; 2.Flatland Forest Center of Manasi County, Manasi 832206, China;3.College of Forestry, Northwest SciTech University of Agriculture and Forestry, Yangling 712100, China
Keywords:
Picea schrenkianapopulation quantitystructure dynamics
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2009.01.013
Document Code:
A
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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Last Update: 2009-05-06