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崤山南麓胡桃楸混交林群落结构及空间分布格局

Community Structure and Spatial Distribution Pattern of Mixed Forest of Juglans mandshurica in the Southern Foot of the Xiaoshan

  • 摘要: 采用典型取样法,对三门峡市甘山林场核桃楸群落的Simpson指数、Shannon-Wiener指数等多样性指数和泊松(Poisson)分布、负二项(Negative binomial)分布进行分析,研究表明,调查样地内乔木层树种的多样性指数、物种丰富度均超过灌木层和草本层,其中乔木层内胡桃楸的重要值最高,空间分布聚集程度最高,年龄结构呈“金字塔”型,在幼树级占比较少,但在中树级株数占比最大,而静态生命表则进一步表明相比于其它海拔,低海拔更适合中树级的胡桃楸生存。

     

    Abstract: Using the typical sampling method, the Simpson index, Shannon-Wiener index and other diversity indices, Poisson distribution and Negative binomial distribution of the walnut catalpa community in Ganshan Forest Farm, Sanmenxia City were analyzed. The diversity index and species richness of tree species in the arbor layer are higher than those in the shrub layer and the herb layer. Among them, the important value of Juglans regia in the arbor layer is the highest, and the spatial distribution and aggregation degree is the highest. The number of plants at the middle tree level was the largest, and the static life table further indicated that compared with other altitudes, low altitude was more suitable for the survival of the middle tree level.

     

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