| Autor: |
Osawa, Akira, Sato, Akira, Toyooka, Hiroshi, Kushima, Hiromichi, Kanazawa, Yoichi, Ishizuka, Moriyoshi |
| Předmět: |
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| Zdroj: |
Journal of Sustainable Forestry. 1998, Vol. 6 Issue 3/4, p367. 0p. |
| Abstrakt: |
In 1954, Picea-Abies forests of central Hokkaido were leveled by a windstorm caused by a typhoon. Successional dynamics following disturbance on several forest habitats were monitored over a thirty-four year period. Differences in site conditions, such as soil, topography, and forest floor vegetation, influenced the direction of succession, but some patterns prevailing in this area were discernible. In the early stage of succession (up to year 10), all sites were immediately occupied by Rubus idaeus var. aculeatissimus which was an inconspicuouscomponent of the stands before disturbance. Plants which dominated the understory of stands before disturbance mostly disappeared during secondary succession except for Sasa senanensis. Residual conifers also survived except for those at a moss-floor site. Betula spp. and Salix spp. invaded within 6--8 years. At year 10-18, R. idaeus suddenlydecreased in canopy cover, while S. senanensis replaced R. idaeus asthe dominant component. Trees, both residuals and invaders, were successful in growing over the shrub layer during this period and species diversity reached apeak. These observations suggest that the timingof tree establishment occurs during the transition from R. idaeus community to S. senanensis community in the shrub-layer, as a deterministic process founded in the life history traits of species. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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