关键词: 乌冈栎, 种群动态, 生命表, 径级结构, 空间格局

Abstract: Using the method of typical sampling and surveys,the populations of Quercus phillyraeoides were investigated in different districts,including Jiangshi,Kaihua,Renhua,Yuanling and Libo.Based on the methods of spatial series substituting for time series and size structure replacing age structure,the study was made on the population dynamics and structure of Quercus phillyraeoides in terms of time specific life table,survival analysis and spatial pattern.The results showed: ① the size class structure ratio of Quercus phillyraeoides was different among the 5 populations,which showed spindle-shape or inverted pyramid form of Jiangshi,Kaihua and Renhua;the population of Hunan Yuanling was the growth form,but the size class structure of Guizhou libo's was not integrated.② there was a significant positive correlation between height and DBH of Quercus phillyraeoides,and the fitted curve was the power equation y=2.0246x^0.4399(R²=0.741 4,P<0.001).③ the negative number existed in the time specific life table in different populations,which indicated that the certain populations had the signs of recession,and the mid-size class individuals were very important for the population to maintain the dominant position in the communities.④ the change of survival curve,death curve and killing curve were wave mode,which revealed that a marked regularity of periodic fluctuation was in the process of natural regeneration,and maybe it was the main power for Quercus phillyraeoides to keep the dominant population.⑤ the V_pi index showed that Guangdong Renhua's was typical diminishing population (V_pi<0),and the populations in the other places were increasing ones,but their values of V_pi were not significantly deviating from 0.⑥ the values of s²/x was more than 1,which meant that the spatial pattern of Quercus phillyraeoides population belonged to the aggregated distribution,and the index of m^*,GI,CI and k had the same variation trend.

Key words: Quercus phillyraeoides, population dynamics, life table, size class structure, spatial pattern