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このページ(論文)をリンクする場合は次のURLを使用してください: http://hdl.handle.net/2261/55316

タイトル: 東京大学北海道演習林の針広混交林における択伐施業がミズナラの個体群動態に及ぼす影響
その他のタイトル: Effects of selection cutting on population dynamics, Quercus crispula in a conifer-hardwood mixed forest in the University of Tokyo Hokkaido Forest.
著者: 福岡, 哲
及川, 希
遠國, 正樹
磯崎, 靖雄
後藤, 晋
著者(別言語): Fukuoka, Satoshi
Oikawa, Nozomi
Tokuni, Masaki
Isozaki, Yasuo
Goto, Susumu
キーワード: dwarf bamboo
mixed forest
Quercus crispula
selection cutting
発行日: 2013年7月25日
出版者: 東京大学大学院農学生命科学研究科附属演習林
掲載誌情報: 東京大学農学部演習林報告. 第百二十九号, 2013年7月, pp. 1-14
抄録: We surveyed the diameter at breast height (d.b.h) of all living trees (n = 297) within a 7.8-ha site in 2003 soon after selection cutting and re-measured d.b.h of those still-living in 2008, five years after selection cutting, to clarify the effects of selection cutting on the dynamics of a Quercus crispula population in a conifer-hardwood mixed forest in the University of Tokyo Hokkaido Forest. Then, we surveyed the site and identified the spatial location and d.b.h. of new recruits (height ≧ 130cm). Furthermore, we established 5 × 5-m plots for evaluating seedling and sapling abundance in four different environments, 1) around new stumps of Q. crispula, 2) closed canopy, 3) south-facing slopes along the forest roads, and 4) north-facing slopes. The former two environments are in forest stands, whereas the latter two are on the forest edge. Then, we counted the number of Q. crispula seedlings (height < 20cm) and saplings (20cm ≦ height < 130cm). This study revealed that no dead trees were detected during the five years after selection cutting. We also found that living trees in selection-cutting forests showed greater growth than those in forests without silvicultural practice. Furthermore, the numbers of seedlings and saplings were significantly higher around new stumps than in those in other environments. In contrast, very few new recruits were detected in forest stands, most of recruits occurred in the south-facing slope in the forest edge. It is assumed that selection cutting increased the number of Q. crispula seedlings and saplings, however, it did not affect the trend of recruitment.
URI: http://hdl.handle.net/2261/55316
ISSN: 03716007


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