群落構造論への四分表法の導入 : 英彦山ブナ林の構造について

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概要

• 論文の詳細を見る

• In this paper first are given an introduction and critical discussions to Cole's Index (COLE 1949), Goodall's Indicator Value (GOODALL 1953) and Goodall's objective method of grouping plant communities (GOODALL 1953), all of which are based on 2×2 table treatments of Statistics. The Index of Goodall's Indicator Value is modified by the writer so as to indicate it in a form of coefficient values (Equation 10 and 12,Table 18) between +1.00 and -1.00. However, when b (Table 2) is O and a (Table 2) is O, in spite of the figures of c and d (both in Table 2), the indices become +1.00 and -1.00. Therefore, to correct this point the writer gives other equations (Equation 13 and 14). The structure of the beech forests on Mt. Hiko is studied by means of those 2×2 table methods mentioned above. Fifty-four sample plot areas, 15m×15m in size, are obtained at almost random from the beech forest area at altitudes of 840-1150m on Mt. Hiko, considering significantly such a relief factor of environmental complex as peak, slope, ridge and ravine. More than 100 species are recorded in 54 quadrats, from which are selected 24 major species having frequency values of more than 20% and mean values of cover of more than 0.3 by means of Braun-Blanquet's total estimation method, and moreover including some species which locally predominate over the others within each orographical area. X^2 values of those major component species are shown in Table 3,with their values of Cole's Index in Fig. 1,and in Table 4 (Index of the degree of Habitat Segregation) and Table 5 (Index of the degree of Joint Occurrence). Following Goodall's method (GOODALL 1953), four different procedures of grouping plant communities are performed, which are shown in Tables 6,8,10,and 12. In consequence, four different kinds of plant communities are distinguished from each other in the stand of Sasamorpheto-Fagetum crenatae of Mt. Hiko ; the Sasa nipponica group, Rhododendron Metternichii group, Fagus crenata group and Fraxinus Spaethiana group, and it seems to the writer that each group corresponds to "Facies" in the concept of BRAUNBLANQUET. The Sasa nipponica facies is developed on ridges near peaks (1030-1150m alt.), Rhododendron Metternichii facies on and near ridges (960-1140m alt.), Fraxinus Spaethiana facies in and near ravines (880-1040m alt.), and Fagus crenata genuine-facies almost everywhere in the area (840-1110m alt.) regardless of such a relief condition (Table 19).

• 日本生態学会の論文
• 1955-10-31

著者

• 細川 隆英

  九州大学理学部生物学教室

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