Ecological positions of conifers on the stand structure of the temperate forest in central Japan

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  • 中部日本の冷温帯林での針葉樹種の森林構造における位置

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Abstract

The mixed conifer-hardwood forest was found in cool temperate forests of central Japan that co-dominated with conifers and deciduous broad-leaved trees. To examine the ecological roles of conifers in a cool temperate forest of central Japan, the florisitic composition and stand structure were analyzed along an altitudinal gradient of the temperate zone in Shizuoka Prefecture, Japan. Research plots of 20 m square (0.04 ha) were set up between altitudes of 900 m and 1800 m. Species were identified, and measured their diameters and heights. As a result, species replacement of conifers was not observed conspicuously by altitude gradient, and Abies firma and Tsuga sieboldii were widely dominant. Conifers affected the forest structure, such as canopy height and maximum DBH. Conifers showed a high contrition on the stand structure in cold temperate forests of central Japan.

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