奈良県曽爾高原お亀池湿原の花粉学的研究

IR JASI Web Site

Bibliographic Information

Other Title
  • 奈良県曽爾高原お亀池湿原の花粉学的研究(林学部門)
  • ナラケン ソジ コウゲンオ カメチ シツゲン ノ カフンガクテキ ケンキュウ
  • Palynological study of the Okameike moor in Soni plateau, Nara (Forestry)

Search this article

Description

The writers carried out pollen analytical study of the Okameike peat deposits in the Soni plateau located north eastern part of Nara, and from the results attained was able to visualize the historical changes in the forests since the Late glacial period. The summary of the results are as follows. 1. The ^<14>C date of peat at 220-230cm levels was 3860±160y.B.P. (code NO. KSU-314). Volcanic ash layer at 281-284cm was the Akahoya ash erupted from the Kikai caldera between 6000 and 6500y.B.P. 2. Six forest stage were recognized in the vegetational history since the Late glacial period : 1) Abies・Tsuga・Pinus-Betula stage 2) Fagus・Lepidobalanus・Carpinus stage 3) Abies-Lepidobalanus stage 4) Abies-Castanea stage 5) Cyclobalanopsis-Abies stage 6) Pinus stage The first stage is characterized by the dominance of the subarctic forest elements. This stage, therefore, corresponds to the Late glacial period. The second stage is dominated by the cool temperate forest elements. The third and the fourth stage are characterized by the increase of Abies that mainly constitutes the temperate ecotne forest. In the fifth stage, the warm temperate forest element, Cyclobalanopsis becomes dominant. It seems that this stage was situated in upper part of the warm temperate forest zone. The dominance of Pinus in the sixth stage reflects the destruction of natural forests by human activities.

Journal

Details 詳細情報について

Report a problem

Back to top