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Twenty years of community dynamics in a mixed conifer : broadleaved forest under a selection system in northern Japan
| Title: | Twenty years of community dynamics in a mixed conifer : broadleaved forest under a selection system in northern Japan |
| Authors: | Yoshida, Toshiya Browse this author →KAKEN DB | | Noguchi, Mahoko Browse this author | | Akibayashi, Yukio Browse this author | | Noda, Masato Browse this author | | Kadomatsu, Masahiko Browse this author | | Sasa, Kaichiro Browse this author →KAKEN DB |
| Keywords: | temperate deciduous forest | | sitka spruce stands | | boreal forest | | dwarf bamboo | | regeneration process | | natural disturbance | | western hemlock | | early response | | gap dynamics | | canopy gaps |
| Issue Date: | Jun-2006 |
| Publisher: | NATL RESEARCH COUNCIL CANADA |
| Journal Title: | Canadian journal of forest research |
| Volume: | 36 |
| Issue: | 6 |
| Start Page: | 1363 |
| End Page: | 1375 |
| Publisher DOI: | 10.1139/X06-041 |
| Abstract: | Single-tree selection has been employed widely in northern Japanese mixed forests, but management-induced changes in forests are not well understood. This study examined demographic parameters of major tree species during a 20-year study of a 68 ha stand in which single-tree selection has been conducted since 1971. Results showed that growth and survival of conifers (mostly Abies sachalinensis (Fr. Schm.) Masters) was the most strongly positively affected by the treatment. Nevertheless, recruitment of conifers was not sufficiently improved, suggesting their decreased dominance over the longer term. Instead, shade-intolerant broad-leaved species (mainly Betula ermanii Cham.) will gradually increase because of their higher recruitment rates after the treatment. Shade-tolerant broad-leaved species (mainly Acer mono Maxim. and Tilia japonica (Miq.) Simonkai) appeared to experience the most distinct negative effects, especially on survival. These trends differed markedly from those reported in previous papers concerning partial harvesting systems, which predicted an increase in dominance of shade-tolerant species. The results shown here should be generalized carefully because we have investigated only one stand without repetition of the control area. Nevertheless, trends described in this large-scale, long-term study could provide a basis for simulating stand dynamics. We discussed possible reasons for the observed patterns and provided implications for sustainable management in the region. |
| Rights: | copyright 2006 NRC Canada |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/14458 |
| Appears in Collections: | 北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 吉田 俊也
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