@article{oai:ir.kagoshima-u.ac.jp:00012649,
 author = {金谷, 整一 and Kanetani, Seiichi and 玉泉, 幸一郎 and Gyokusen, Koichiro and 伊藤, 哲 and Ito, Satoshi and 齋藤, 明 and Saito, Akira},
 journal = {鹿児島大学農学部演習林研究報告, Research bulletin of the Kagoshima University forests},
 month = {Mar},
 note = {The floristic composition of warm-temperate zone forests containing Pinus  armandii var. amamiana (PAAm), an endangered species, was investigated according to phytosociological methods in its three natural habitats on Yaku-shima Island. Forty-three study stands were divided into four forest types identified by the dominant species in the canopy and sub-canopy layers using cluster analysis. Although almost all coniferous forest stands with PAAm (Type A and B) distribute in  Distylio-Quercetum salicine community on steep ridges with an angle of inclination above 30°, PAAm showed significant positive interspecific associations with five species identified as a component of the ridge species, such as Tsuga sieboldii and Myrica rubra. This evidence indicated that PAAm forests were recognized a unique lower unit of Distylio- Quercetum salicine community consisting with a component of the ridge species. In each forest type, Myrsine  seguinh and Rhododendron tashiroi dominated through the sub-canopy to the herb layers, but PAAm seedlings and saplings were not observed under sub-canopy layers in almost all study stands. The establishment of PAAm forests was initiated after the formation of large gaps in the canopy layer with soil disturbance including lost advance regenerations of the broad-leaved trees which are distributed in the understory., 屋久島の暖温帯常緑広葉樹林における絶滅危惧種ヤクタネゴヨウの3カ所の自生地で,43林分の種組成を植物社会学的手法にしたがって調査した。調査林分は,クラスター分析により高木層および亜高木層の優占種の被度に基づいて,4つのタイプに区分された。ヤクタネゴヨウが出現したタイプの林分は、傾斜30°以上の急峻な尾根筋に多く成立していた。ヤクタネゴヨウは,ツガおよびヤマモモ等の尾根筋に分布する5種と正の相関があったが,イスノキおよびウラジロガシ等の22種とは負の相関であった。これらのことから,ヤクタネゴヨウ林分は,イスノキーウラジロガシ群集における下位単位として,尾根型要素を多く含んだ特異的な群落であると考えられた。ほとんどの調査林分で亜高木層以下の階層は,タイミンタチバナやサクラツツジが高被度で優占し,ヤクタネゴヨウの稚幼樹は生育していなかった。以上のことから,ヤクタネゴヨウ林分の成立には,大規模な林冠ギャップの形成に加え,林床に分布する広葉樹種の前生樹が消失するような土壌擁乱が必要であると考えられた。},
 pages = {49--61},
 title = {屋久島におけるヤクタネゴヨウ林分の種組成},
 volume = {37},
 year = {2010}
}