各務原市におけるシデコブシ群落と微地形との関係

[論文] Articl

大根山湿地(岐阜県恵那市飯地町)の植生

[短報

萌芽に依存するシデコブシ個体群の更新

[短報

乗鞍岳におけるウラジロナナカマドとナナカマドの標高差による開花・結実の相違

乗鞍岳（岐阜県飛騨山脈南部，標高3026 m; Fig. 1）の高山帯から亜高山帯にかけての森林の林縁部にはウラジロナナカマドSorbus matsumurana （Makino） Koehne が，亜高山帯から山地帯にかけての森林の林縁部にはナナカマドS. commixta Hedl. が，それぞれ普通に分布する。我々は乗鞍岳のナナカマド Sorbus属の近縁種の調査を行い，垂直分布と生育地の相違について明らかにした（後藤ほか 2012）。ここでは前報に引き続き，乗鞍岳に生育するナナカマド属の近縁種，ウラジロナナカマドとナナカマドの標高差による開花・結実の相違について，報告する。Flowering and fruiting timings were compared between Sorbus matsumurana and S. commixta with special reference to their vertical distributions at Mts. Norikura in Gifu Prefecture. In S. commixta, flowering firstly started in populations at low elevation and gradually progressed to those at higher elevations. By contrast, S. matsumurana populations in upper alpine belt bloomed earlier than those in lower alpine belt. Since alpine plants have to complete their reproductive processes during a short summer season, earlier blooming might be adaptive in the alpine habitat. The reversal observed in S. matsumurana might be explained by the earlier-blooming strategy of alpine plants

乗鞍岳におけるナナカマド類の垂直分布と生育地の植生

Vertical distribution of Sorbus species and species composition of their habitats were investigated at Mts. Norikura in Gifu Prefecture. Three species of Sorbus were observed in the area. S. matsumurana was mainly distributed at edge of the Pinus pumila forest at snowpatch site in alpine belt. S. sambucifolia was mainly distributed in the Pinus pumila forest at wind-swept site in alpine belt. S. commixta was mainly distributed at the mantle community of the coniferous forest in subalpine belt. However, these three species were observed at the same place, the upper subalpine belt （alt. 2500-2250m）. In this place, the hybrid individuals of them were identified. Moreover, the species composition of plant communities including Sorbus species was elucidated