摘要
对湖北后河国家级自然保护区常绿阔叶林水丝梨 (Sycopsissinensis Oliver)群落进行了种群空间分布格局的研究 .分别将种群中的每个个体在样方中进行定位 ,随机选取一系列不同尺度的小样方 ,运用多种指数判定水丝梨在不同取样尺度上的格局类型 .结果表明 :4m× 4m、6m×6m的尺度上为集群分布 ,其余区组为随机分布 ,且各指数判定吻合性较好 .集群分布出现在较小的观测尺度上是缘于微环境异质性诸如光因子、土壤因子、林窗、岩石裸露的影响 .在较大区组上多呈随机分布 ,这与群落内气候和大生境的一致以及长期处于原始自然状态下密切相关 .水丝梨种群的空间分布格局受群落学特征的影响主要体现在群落种类组成和结构上 .
The largest area Sycopsis sinensis community, evergreen broad leaved forest, was found in Houhe National Nature Reserve, Hubei province, China. Spatial distribution pattern was studied. Individuals of Sycopsis sinensis of three plots were set respectively in plot coordinate and were sampled at random. Several indices were used to judge the distribution pattern in different sampling scales, such as Morisita index, Coefficient of distribution. Spatial distribution pattern varied with the scale of observation. Random distribution pattern was more often found. This is related to similar climate, habiat and the primitive characteristic of environments. Under the same climate and site condition, the heterogeneity of microenvironment resulting from the factors of soil, light, and different degree of rock cover significantly affected the scale of clumped distribution pattern in some smaller scales. As the dominant, the distribution of Sycopsis sinensis in community was affected by other tree species, especially by the broad leaved species. Humility and soil were the major factors determining the distribution pattern of Sycopsis sinensis population.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第2期217-220,共4页
Journal of Central China Normal University：Natural Sciences
基金
湖北省林业厅资助项目
