東北地方の亜高山帯における表層花粉と植生の関係について

概要

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A pollen analytical study was made on 71 surface samples obtained from the moors in the Hakkoda Mountains, the Hachimantai Mountains, Mount Kurikoma, and Mount Gassan, Northeast Japan. These modern pollen spectra were then compared with the present vegetation. The results of this comparison were as follows.1) When samples collected from the subalpine coniferous forest zone of the Hakkoda Mountains and the Hachimantai Mountains, the temperate elements occupied at least 20-30% of the total arboreal pollen (AP). As for the samples collected from the subalpine deciduous scrub zone of Mount Kurikoma and Mount Gassan, the temperate elements occupy at least 40-50% of the total AP.2) Therefore, it is difficult to distinguish between the AP spectrum obtained from the cool temperate deciduous forest zone and the one obtained from the subalpine deciduous scrub zone.3) It is possible to distinguish between the two by comparing the sequences of the subalpine deciduous scrub pollen such as Alnus, Ericaceae, etc. alongside of altitude.
日本第四紀学会の論文