Details

Autor(en) / Beteiligte

• Matsue, Michiyo
• Inada, Akira
• Tanabe, Tomotaka
• Nirei, Takashi
• Uenaka, Hisako
• Hongo, Misao
• Kobayashi, Kensuke

Titel

Reconstruction of vegetation during the latter half of the last glacial maximum in and around the Togakushi Highlands of northern Nagano Prefecture, central Japan

Ist Teil von

• The Quaternary Research (Daiyonki-Kenkyu), 2012/04/01, Vol.51(2), pp.79-92

Ort / Verlag

Japan Association for Quaternary Research

Erscheinungsjahr

2012

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• A palynological study has been carried out using samples of the Sakasagawa member, which is a part of the fan deposit from the Late Pleistocene to the Holocene, overlying the Togakushi Highlands (alt. 1,200m). The chronology of the sediment was based on three 14C dates. Between 18,000 and 15,000yrsBP, large areas of the Togakushi Highlands were covered by humidiherbosas, which were mainly composed of Cyperaceae, Gramineae with Polemonium, and Selaginella selaginoides growing in open sites. The forests surrounding the humidiherbosa were composed predominantly of Picea, Tsuga, Pinus subg. Haploxylon, and Abies, and they were situated in the upper subalpine zone. This period is the latter half of the last glacial maximum. At ca. 15,000yrsBP, this area began to warm. This period is equivalent to the beginning of the late glacial. Between 15,000 and 13,000yrsBP, there had been the humidiherbosa with Polemonium and Selaginella selaginoides growing continuously on the Togakushi Highlands. But subalpine coniferous forests such as Picea, and Pinus subg. Haploxylon with Betula became abundant. Cool-temperate deciduous broad-leaved trees such as Quercus subg. Lepidobalanus began to spread gradually in the area at altitudes lower than the Togakushi Highlands.