广西大明山格木种群的空间分布格局与数量动态特征

doi:10.11707/j.1001-7488.20141001

Abstract

Abstract:

A one-hectare plot was set in a well-conserved forest of Erythrophleum fordii at Damingshan Nature Reserve, Guangxi Autonomous Region. The four aspects of population spatial pattern, age structure, static life table and survival curve were investigated to study the spatial distribution pattern, quantitative characteristics and dynamics of E. fordii populations. The results showed that the spatial distribution pattern tended to be cluster on the whole, but changed from cluster at young and middle-aged stages to random at mature age stage. The population age structure shaped like pyramid, indicating that the population of E. fordii was increasing, and the population was stable even taking potential artificial disturbance into account. Seedlings and saplings were abundant in the population with high mortality, and the individual number decreased severely from age class three to Age Class four, and this period was thus considered as milestone in E. fordii population dynamics. Thereafter the mortality rate in higher age classes was obviously lower with low rate of individuals. Population survival analysis showed that mortality rate, mortality density and hazard rate declined as age classes increased. Competition at young stage was stronger than that at middle and mature stages, and the survival curve of this tree species fitted the Deevey Type Ⅲ.

Key words: Erythrophleum fordii, static life table, age structure, population dynamics, Damingshan Mountain in Guangxi

CLC Number:

Zhao Zhigang, Guo Junjie, Zeng Jie, Xu Jianmin. Spatial Patterns and Quantitative Dynamics of Erythrophleum fordii Populations at Damingshan Mountain, Guangxi[J]. Scientia Silvae Sinicae, 2014, 50(10): 1-7.

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Spatial Patterns and Quantitative Dynamics of Erythrophleum fordii Populations at Damingshan Mountain, Guangxi

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