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Twenty years of community dynamics in a mixed conifer : broadleaved forest under a selection system in northern Japan

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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
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)
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)

Submitter: 吉田 俊也

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