小陇山锐齿栎天然林空间结构特征

doi:10.11707/j.1001-7488.20090301

Abstract

Abstract:

Abstract: This paper used diameter distribution and spatial parameter （uniform angle index, mingling and neighborhood comparison） to study the spatial structure characteristics of three stands of Quercus aliena var. acuteserrata natural forest in Xiaolongshan. The result showed that the structure of the three stands was obviously different: the diameter distribution in the natural forest in Wang'angou which absented disturbance for 100 years, andin the secondary forest originated from a clear\|cutting site in Xiangtangou in 1969 were of the typical uneven\|aged forest, and their tree number proportion of small and middle diameter class were large in stands and the proportion was decreased with the diameterclass increased. In comprison, the Wang'angou diameter distribution was more uniform than Xiangtangou. The small stem proportion was larger in Bayingxigou but it decreased more gently with the diameter increase, which suggested there was an obviously disturbance trace. The uniform angle index value of Wang'angou and Baiyingxigouwas 0.489 and 0.487 respectively, and the pattern of horizontal distribution was random. The uniform angle index value of Xiangtangou was 0.520, and its distribution was of slight cluster, which exhitited the the community was stillat early stage of succession. The tree species segregation of Wang'angou was maximum, followed by Xiang tangou and then Baiyingxigou. Their mean value of mingling was 0.598, 0.542 and0.451 respectively. Neighborhood comparison showed that Betula platyphylla and Pinus armandi were in different status in three different stands, and their status were decreased in order from Wang'angou, Xiang tangou to Baiyingxigou. However, Quercus aliena var. acuteserrata and Toxicodendron verniciflum had the same status in stands. Artificial disturbance had obviously effect on the forest structure in Baiyingxigou.

Key words: Key words: Quercus aliena var. acuteserrata, natural forest, diameter distribution, uniform angle index, mingling, neighborhood comparison, Xiaolongshan

Zhao Zhonghua;Hui Gangying;Yuan Shiyun;Liu Wenzhen;Wang Runxi . Spatial Structure Characteristic of Quercus aliena var. acuteserrata Natural Forest in Xiaolongshan[J]. Scientia Silvae Sinicae, 2009, 12(3): 1-6.

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Spatial Structure Characteristic of Quercus aliena var. acuteserrata Natural Forest in Xiaolongshan

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