青海云杉种群空间分布特征及不同林龄相互关系

Spatial distribution of Picea crassifolia population and relationships between the species ages

根据甘肃祁连山国家级自然保护区寺大隆自然保护站青海云杉林样地调查数据,采用点格局分析方法研究了青海云杉林不同龄级的分布格局及不同龄级间相互关系.结果表明:研究样地青海云杉龄级C在所研究的较大尺度范围内表现为比较明显的聚集分布.龄级B、D均表现较大尺度范围内的随机分布;除在小尺度上表现出显著相关外,不同龄级间关联性不明显,但是在尺度<3 m时,龄级D与龄级B、C呈现显著的负相关关系.调查样地曾受人类砍伐的干扰,影响青海云杉林种群空间分布格局.

Based on the investigation data of the Picea crassifolia forest in the Sidalong natural reserve of the Qilian Mountains,the spatial pattern and the relationships between different ages of Picea crassifolia were studied using the spatial point-pattern analytical method.The results showed that the distribution pattern of the plant species was closely relative to the spatial scale,and age-class C was characterized by a clumped distribution.However,age-class B and age-class D had a random distribution at different scales.The relationships between individuals in different age-classes had almost no significant correlation with each other.But age-class D was significantly negatively associated with age-class B and ageclass C at scales<3 m.The point pattern analysis laid a foundation for understanding the size of the population and the distribution pattern of Picea crassifolia forest.The forest had been disturbed by human activities,which affected the result of the point-pattern analysis.