農村周辺の1960年代以降における二次植生の分布構造とその変遷

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Change in management regimes invariably result in an alteration in the vegetation landscape. The present study seeks to elucidate socially and economically induced changes in landscape pattern in terms of spatial distribution and structure of vegetation at Minamikata, Chiyoda-cho, Hiroshima Pref., a typical farm village in southwestern Japan. In 1966,the scrub community and the forests of all height classes of deciduous oak and Japanese red pine were distributed mosaically, because the trees had been periodically felled for charcoal and timber. Additionally, a sparse woodland of pine was maintained for mowing to produce compost. In 1987,the total number of units identified by dominant species and community height (vegetation types) had decreased, and larger vegetational units had appeared. Due to the cessation of disturbance by cutting and mowing following the replacement of fuel and fertilizer from forest sources by fossil and chemical products. Practically all the vegetation types of 1966 had developed into tall tree forests of oak and pine. Throughout this process, the boundaries of several vegetational units became fused into the same vegetation type. In 1987,tall pine forest was divisible into Sasa veitchii var. hirsuta type and the Eurya japonica type by dominance in forest floor vegetation. These two types are respectively distributed only in forests near to, or far from hamlets, clearly showing that the recent human impact is limited to rural forests near settlements. The progressive succession of secondary vegetation has been occurring in all of the remaining area.
日本生態学会の論文
1990-12-31

農村周辺の1960年代以降における二次植生の分布構造とその変遷

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