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[目的]为了了解大通老爷山阴坡、半阴坡野生观赏树木种群的空间分布格局。[方法]用两项局部样方方差(TTLQV)法和成对样方方差(PQV)法对大通老爷山阴坡、半阴坡优势观赏植物山杨、白桦和青海云杉种群的空间分布格局进行了研究,并对格局的形成进行了分析。[结果]在现阶段这3个种群的个体都表现出明显的聚集分布特点,其中青海云杉的集聚程度最大,白桦的集聚程度最小,青海云杉和山杨的聚块呈均匀分布。此种格局的形成与种群的繁殖特性有关,种间对光资源的竞争则使格局的强度和纹理发生了进一步的变化。[结论]山杨、白桦和青海云杉3个种群的个体都呈集聚分布,整个群落的水平分布呈镶嵌状。
[Objective] The aim of the study was to understand the spatial distribution patterns of wild ornamental tree populations in the shady slopes and semi-shady slopes of Datong Noble Hill. [Method] The spatial distribution patterns of Populus davidiana, Betula platyphylla and Picea crassifolia populations on shady slopes and semi-shady slopes in Datong Hailo Mountain were studied by using two methods of local quadratic variance (TTLQV) and paired quadrat variance (PQV) Conducted a study, and analyzed the formation of the pattern. [Result] At the present stage, all the three populations showed obvious aggregation and distribution characteristics. Among them, the spruce of Qinghai had the highest degree of agglomeration and the smallest degree of aggregation of Betula platyphylla. The formation of this pattern is related to the reproductive characteristics of the population. The competition of light resources between species causes the intensity and texture of the pattern to undergo further changes. [Conclusion] The individuals of Populus davidiana, Betula platyphylla and Picea crassifolia were all clustered and distributed, and the horizontal distribution of the whole community was inlaid.