森林立地学会誌 森林立地36(1), 1994, pp．44～50
論 文
早池峯山北面のキタゴヨウ・ヒバ・コメツガ林の成立過程
杉 田 久 志・工 藤 一 史
Hisashi SUGITA and Kazushi KUDO: Reconstruction of the history of a mixed
coniferous forest Composed of Pinus parviflora var. pentaphylla, Thujopsis dolabrata
var. hondai and Tsuga diversifolia in the northern area of Mt. Hayachine,
northeast Honshu, Japan
Formation process of a mixed coniferous forest
composed of Pinus paruiflora var. pentaphylla, Thujopsis dolabrata var. hondai
and Tsuga diversifolia on the
ultrabasic rocks was investigated by annual ring chronologies in the northern
area of Mt. Hayachine, northeast Honshu, Japan. The stand is regarded to have
been formed under the influence of an intensive disturbance affecting a vast
area at the end of the 17th century. Relatively slight disturbance also would
have occurred around 1880. The Pinus
recruited simultaneously , grew rapidly after the intensive disturbance and
became the canopy trees prevailing over other species. The recruitment of the Thujopsis and Tsuga was carried out by advance regenerated saplings and they
continued relatively slow growth after the intensive disturbance. Abies mariesii recruited in the
undergrowth after the regenerated Pinus,
Thujopsis and Tsuga formed a closed canopy layer, and grew extremely slowly.
Broad-leaved species such as Betula
spp. and Magnolia hypoleuca recruited after the slight
disturbance and grew rapidly. The intensive disturbance which caused the forest
regeneration may have been human disturbances such as logging.