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采用单变量和双变量O-ring函数对太白山大熊猫栖息地巴山冷杉林主要树种的空间分布格局、种间关联性及其与林下开花箭竹的空间关联性进行了多尺度分析.结果表明:巴山冷杉林中,巴山冷杉数量最多,但种群结构衰退,白桦种群相对年轻,种群结构稳定,红桦种群也呈衰退趋势;3个主要树种在小尺度上呈聚集分布,随尺度增加,逐渐表现为随机分布.3个树种的空间关联性主要表现在小尺度范围内,随尺度增加,空间分布格局逐渐表现为不关联;巴山冷杉和白桦与开花秦岭箭竹在大、中尺度内呈现正相关,而红桦与开花秦岭箭竹在大、中尺度上表现出负相关.大熊猫栖息地内乔木和林下秦岭箭竹共同推动森林的动态演替和发展,进而影响秦岭大熊猫栖息地的环境变化.
Spatial distribution patterns, interspecific correlations and their spatial correlations with spatial patterns of Spruce-fir forests in the habitat of the Taibai Mountains in the Taibai Mountains were investigated by using univariate and bivariate O-ring functions. The results showed that: In Abies fargesia, the population of Abies was highest, but the population structure declined. The population of Betula platyphylla was relatively young. The population structure was stable. The Betula platyphylla population also showed a declining trend. The three main tree species clustered on a small scale and gradually increased with the increase of scales Were randomly distributed.The spatial correlation of the three tree species mainly manifested in the small scale range.With the increase of the scale, the spatial distribution pattern of the three tree species gradually showed as not related.Furthermore, However, the red birch and flowering Qinling bamboo show negative correlation at large scale and mesoscale.The trees and the Qinling bamboo under the tree in the giant panda habitat promote the dynamic succession and development of the forest, thus affecting the environmental change of the giant panda habitat.