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Detection of the remnant vegetation from the Last Glacial in the mountains of central Japan

日本中部山区末次冰期残留植被的检测

基本信息

批准号：
13680099
负责人：
OKITSU Susumu
金额：
$ 1.66万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680099/
关键词：
Remnant vegetation Last Glacial Vegetation change Central Japan Species interaction Mixed forest Pinus koraiensis Regeneration dynamics バラモミ節樹木大陸要素

项目摘要

This project aims to detect the remnant vegetation, which occurred abundantly in the Last Glacial but at present reduced their occurrence in the mountains of central Japan. The major results are as follows. Two different types of the remnant vegetation can be distinguished: 1) small patches of the forest consisting of such species as reduced their occurrence during the Holocene, Pinus koraiensis, Picea sect. Picea and Larix, 2) Grass lands consisting of the east Asiatic elements. The former appear on the rocky slopes and sharp ridges on Mt.Yatsugatake and on the northern part of Akaishi mountain range. The latter is distributed on the gentle slopes and gentle ridges on the eastern part, of Okuchichibu mountains, Daibosatsu mountain range and Okutama mountains. Those remnant vegetation is well characterized by the presence of the species of east Asiatic elements. The environments of the remnant vegetation is represented by the dry condition through the year and extremely cold in winter. These environments are quite similar to those of the continental part of the north-east Asia. The most reliable scenario explaining the processes of the present distribution of the remnant vegetation is that the vegetation well developing under cold dry environments in the Last Glacial had reduced the occurrence influenced by the warm, moisture, snowy environments since the Holocene, resulting in the sporadic occurrence on the present sites.

该项目旨在探测在末次冰期大量出现但目前在日本中部山区出现减少的残余植被。主要结果如下。两种不同类型的残留植被可以区分：1）小斑块的森林组成的物种，减少出现在全新世，红松，云杉组，云杉和落叶松，2）草地组成的东亚元素。前者出现在八岳山和赤石山脉北方的岩石斜坡和陡峭的山脊上。后者分布在奥地部山脉、大菩萨山脉和奥玉山脉东部的缓坡和缓坡上。这些残留植被的特点是存在东亚成分的物种。残存植被的环境表现为常年干旱，冬季严寒。这些环境与东北亚大陆部分的环境十分相似。最可靠的解释是，在末次冰期寒冷干燥的环境下发育良好的植被减少了全新世以来温暖、潮湿、多雪环境的影响，导致现在的零星分布。