The validity of the floor vegetation and the soil fauna as an index of ecosystem recovery of reclamation forest

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  • SONG Jae-tak
    Graduate School of Bioresource and Bioenvironmental Science, Kyushu University
  • SETSU Takao
    Faculty of Agriculture, Kyushu University

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  • 造成樹林の生態系回復の指標としての林床植生および土壌動物相の有効性
  • ゾウセイ ジュリン ノ セイタイケイ カイフク ノ シヒョウ ト シテ ノ リンショウショクセイ オヨビ ドジョウ ドウブツソウ ノ ユウコウセイ

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Abstract

In order to verify forest ecosystem recovery of reclamation forest, floor vegetation and the soil fauna were examined. While cover degree of the maximum upper story in reclamation forest became low in response to the impact by transplant, in the lower layer part, cover degree was high by growth of pioneer tree species, such as Aralia elata, Zanthoxylum ailanthoides, and Mallotus japonicus, or herb. Although it became low immediately after the transplant of the nature richness(the ratio of the nature richness of reclamation forest against the nature richness of the natural forest)which adopted the soil animal, it was recovered gradually. It was found that soil fauna was affected by various factors such as vertical profiles of canopy structure and micro meteorological factors such as solar radiation and soil temperature. Furthermore, these factors mentioned above showed high correlation compared with soil animal index. In the viewpoint of evaluation of the vegetation changes in the forest floor and clarification of the material cycling in subsurface area, floor vegetation and the soil fauna were effective as an evaluation index of ecosystem recovery of reclamation forest.

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