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在青海省三江源自然保护区麦秀林区,对青海云杉(Picea crassifolia)种群进行垂直样带调查,分析了不同发育阶段和不同海拔高度青海云杉空间格局及其影响因素。结果表明:1)青海云杉种群幼苗、幼树阶段个体数量仅占总体数量的6.6%左右,远低于其他3个发育阶段,已处于衰退的早期阶段;2)不同发育阶段的青海云杉种群均呈集群分布,除幼苗、幼树外,随径阶的增大或年龄的增加,种群呈扩散趋势;3)分布于不同海拔的青海云杉种群均趋于集群分布,但其聚集程度不尽相同。
A vertical transect survey was conducted in the Picea crassifolia population in Maixiu Forest District of Sanjiangyuan Nature Reserve in Qinghai Province. Spatial patterns and their influencing factors of Picea crassifolia populations in different developmental stages and at different altitudes were analyzed. The results showed as follows: 1) The population of seedlings and saplings in Qinghai spruce population only accounted for about 6.6% of the total population, much lower than the other three developmental stages and already in the early stage of recession; 2) All the populations were clustered. Except seedlings and young trees, the population tended to spread along with the increase of diameter or age. (3) The populations of Picea crassifolia distributed in different altitudes tended to cluster, but the degree of aggregation not exactly.