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Title: 和歌山演習林における二次林の動態について (I) : 固定標準地の林況と樹種の分布様式
Other Titles: Study on thc dynamics of trees in the secondary forest of Kyoto University Forest in Wakayama : (1) Stand condition and distribution pattern of tree species in the parmanent experimental plots
Authors: 真鍋, 逸平  KAKEN_name
吉村, 健次郎  KAKEN_name
竹内, 典之  KAKEN_name
谷口, 直文  KAKEN_name
紺野, 絡  KAKEN_name
Author's alias: Manabe, Ippei
Yoshimura, Kenjiro
Takeuchi, Michiyuki
Taniguchi, Naofumi
Konno, Megumu
Issue Date: 20-Dec-1986
Publisher: 京都大学農学部附属演習林
Journal title: 京都大学農学部演習林報告
Volume: 58
Start page: 12
End page: 24
Abstract: 京都大学和歌山演習林の標高1000m以上の山腹上部で, 大正末期 (1925年頃) まで採草地として利用され, その後放置されて, 現在落葉広葉樹林となっている区域に, 固定標準地を4ヵ所設けた。今回はその林分状況と, 主たる稚幼樹を含む樹種の分布様式をしらべた。4つのプロット (A, B, C, D) に生育しているミズナラ, リョウブ, ネジキは, ほとんど萌芽により更新したもので, 地際から2本ないし5本株立ち状になっている。ミズナラが全体数の約40%を占めるプロットC以外のプロットはカエデ類, シデ類, リョウブで全体数の60%以上を占めている。高木層はヒメシャラ, ミズメが多く, 低木層はタンナサワフタギ, ガマズミが多い。林床はプロットAの下部に稈長約1mのスズダケが見られる以外は, 稈長約30㎝のミヤコザサが散生している程度で, 林床植生量は少ない。
In order to investigate the condition of a secondary forest of deciduous broadleaved trees and the distribution pattern of trees in the stand of the Kyoto University Forest in Wakayama, we set up four permanent experimental plots covering an area of 0.1 hectare each, in 1984 and 1985. This stand, having an altitude of 1100-1200m, was upland meadow about sixty years ago. It, by progressive succession, changed to a mixed forest with Acer Sieboldianum, Carpinus laxiflora, Quercus mongolica, Betula grossa, Stewartia monadelpha, Fagus crenata, Clethra barbinervis, Lyonia ovalifolia, about fifteen kinds of deciduous broadleaved trees and Pinus densiflora. In the stand, there are about 4, 000 trees per hectare; the basal area is about 32 m2 in total; the average diameter at breast height is 9 cm; the maximum diameter is 36 cm; the maximum height is 16 m. Distribution patterns of 7 tree species were analysed by using the m*-m regression method. Component of distributions was a single individual in the case of Acer Sieboldianum and a loose colony in the other species. The components of distribution were random, even, and aggregative distributions depending upon the heterogeneity of environmental conditions in each study plot.
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