摘要
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、半阴坡优势植物山杨(Populus davidiana)、白桦(Betula platyphylla)和青海云杉(Pi-eca crassifolia)种群的空间分布格局进行了检验。结果表明:这三个种的个体都呈集聚分布,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。
The spatial distribution pattern of dominant plant populations,Populus davidiana,Betula platyphylla and Pieca crassifolia,have been measured with the methods of TTLQV and PQV.The results showed that the patterns of three species wore clumped distribution.The forming of the pattern were firstly related to the reproductive nature of species,seeondarily,to inter- specific competition to light resource which led to some changes in inten- sity and veins of the pattern.The intensity of patterns was the highest for P.crassifolia,and the lowest for B.platyphylla.The clumps of P. davidiana and P.crassifolia were uniform distribution.
关键词
植物种群
空间分布
阴坡
半阴坡
Quadrat variance method
Plant population
Spatial distribution pattern
