Difference of invasion behavior between two climax species,Castanopsis cuspidata var.sieboldii andMechilus thunbergii,on lava flows on Miyakejima,Japan |
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Authors: | Shozo Hiroki Kazuo Ichino |
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Institution: | (1) College of General Education, Nagoya University, 464-01 Nagoya, Japan;(2) College of General Education, Aichi University, 440 Toyohashi, Japan |
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Abstract: | The invasion behavior of two climax species,Machilus thunbergii Sieb. et Zucc. andCastanopsis cuspidata (Thunb.) Schottky var.sieboldii (Makino) Nakai, was studied on the 1874 and 1962 lava flows on Miyakejima, Japan. On the 1962 lava, zoochorousM. thunbergii appeared almost only under crowns of pioneeringAlnus sieboldiana Matsum, while bolochorousC. cuspidata var.sieboldii occurred only along the borders of the lava. The three species,A. sieboldiana, M. thunbergii andC. cuspidata var.sieboldii, corresponded, in order, to the temporal sequence of invasion in the boundary forest and the spatial sequence from margin
to center on the 1962 lava. Seed or fruit dispersion is important in primary succession in the case of large disturbances. |
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Keywords: | Castanopsis cuspidata var sieboldii lava flow Machilus thunbergii seed dispersion succession |
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