川西米亚罗林区冷杉林群落特征与生态因子的关系  

Relationships between fir community characteristics and ecological factors in Miyaluo forest area of West Sichuan.

作　　者：郭宁[1] 邢韶华[1] 姬文元[1] 崔国发[1] 汪明[2] 薛樵 蒋先敏[3] 

机构地区：[1]北京林业大学自然保护区学院,北京100083 [2]四川省阿坝州理县林业局,四川理县623100 [3]四川省阿坝州川西林业局,四川理县623102

出　　处：《生态学杂志》2010年第6期1054-1060,共7页Chinese Journal of Ecology

基　　金：国家"十一五"科技支撑计划资助项目(2006BAD03A0406)

摘　　要：冷杉林是川西高山峡谷地区的地带性植被。以米亚罗林区的森林小班数据为基础,分析了该地区天然冷杉林的树高、胸径和蓄积量随不同生态因子的变化趋势及分布格局,并探讨了冷杉林最适宜的分布环境。结果表明:冷杉林的树高和胸径随着海拔的升高均呈现单峰曲线变化趋势,蓄积量则随着海拔梯度的升高呈波动上升趋势,这些现象可能与小环境的变化、人为干扰有关;冷杉林的适宜生态因子范围为:海拔3500～4000m、土壤厚度50～79cm、坡度40°～49°的中、上位阴坡和半阴坡;海拔3800～3900m为冷杉林的最集中分布区域,该区域中影响冷杉林群落特征的生态因子排序为坡位、土壤厚度、坡度、坡向。Fir forest is the zonal vegetation in West Sichuan alpine valley area. Based on the forest inventory data in Miyaluo, this paper analyzed the relationships between the tree height, DBH, volume, and distribution of fir forest and the ecological factors in the area, and discussed the most suitable habitats for the forest. It was shown that with increasing altitude, the tree height and DBH changed in single peak curve, while the volume had a fluctuated increase, which could be related to the characteristics of micro-environment and human disturbances. The suitable habitat of the fir forest was at an altitude ranged from 3500 to 4000 m a. s. 1. , with a soil depth from 50 to 79 cm, and a slope degree from 40° to 49°. In addition, the fir trees preferred the halfshady side of slope, or the superior shady side of mid- or top-slope. A large proportion of the fir forest concentrated within an altitude range from 3800 to 3900 m a. s. 1.. Slope position was the most fundamental ecological factor affecting the fir forest community characteristics, followed by soil depth, slope, and aspect.

关 键 词：冷杉林 群落特征 生态因子 米亚罗 川西 

分 类 号：S718.5[农业科学—林学]