Spatial Heterogeneity of Colonizing Tree Communities in Relation to Slope Characteristics and Stand Structure of a Cryptomeria japonica Plantation in Northern Japan

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概要

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• The objective of this study was to infer the most important gradients influencing species composition and abundance of colonizing native trees (CNT) in an unthinned Japanese cedar (Cryptomeria japonica D. Don) plantation in northern Japan. A 0.84-ha (60×140m) plot was established in the stand and was subdivided into a total of 42 subplots (20×10m each). For each tree >3cm in diameter at breast height (DBH) in each subplot, we recorded the species and DBH. Path analysis with structural equation modeling was performed to analyze the correlation and causal relationships between slope characteristics, soil properties and vegetation attributes of the set of subplots. Species composition of CNT was strongly affected by site conditions along relatively short gradients of slope aspect and soil water content, but stand height had little effect on species composition. In contrast, the abundance of CNT was strongly affected by site conditions along relatively short gradients of slope aspect and soil water content, and stand height also significantly affected abundance. The contrasting patterns of variation between species composition and abundance of the CNT may reflect the fact that the mortality rate of CNT at the adult tree stage varies according to vertical stand structure rather than to interspecific differences in survival patterns. In conclusion, recruitment patterns from the juvenile tree stage for each species were related principally to species composition and abundance of CNT, and site-specific mortality at the adult stage was also significantly related to the abundance of CNT.

• 森林計画学会の論文

著者

• Kunisaki Takashi

  Faculty Of Agriculture Iwate University

• Kunisaki Kanoko

  Apple Breeding And Physiology Research Team National Institute Of Fruit Science

関連論文

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• Management System for Japanese Oak on the Kyushu University Forest in Hokkaido : Experiment for the 30-year Period
• Analyzing the Relationship between Periodic Height Increment and Height at the Beginning of the Increment Period in Even-Aged Pure Stands of Japanese Larch (Larix kaempferi) Based on Stem Analysis
• Spatial Heterogeneity of Colonizing Tree Communities in Relation to Slope Characteristics and Stand Structure of a Cryptomeria japonica Plantation in Northern Japan
• DBH-Height Relationship for Japanese Red Pine (Pinus densiflora) in Extensive Natural Forests in Southern Japan.

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