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A Study Based on the Pollen Analysis of the Formation and Changes of Hinoki (Chamaecyparis obtusa) Forests in Central Japan since the Pleistocene

基于花粉分析的更新世以来日本中部扁柏林的形成和变化的研究

基本信息

批准号：
63560154
负责人：
TAKEOKA Masaji
金额：
$ 1.6万
依托单位：
Kyoto prefectural University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63560154/
关键词：
Central Japan Since the Pleistocene Formation of Hinoki Forests

项目摘要

The purpose of the present study is to inquire into the formation and changes of Hinoki (Chamaecyparis obtusa forests in central Japan since the Pleistocene and to get source materials which will help to deal with such important issues as the Hinoki afforestation, the preservation of the forest environment and protection of natural environment. Peat deposits collected by boring at 12 spots were used as the materials, to which the pollen analysis was applied. The outline of the observations is as follows :1. Pollen grains, their fine relief and the stratification of their walls, of four genera - Chamaecyparis, Thuja, Thujopsis and Juniperus belonging to Cupressaceae - have been investigated with an ordinary light microscope and an electron microscope.2. The existence of the following 3 types of Hinoki forests was confirmed by assessing the date of their formation :(1) The analysis of the peat deposits at Tadachi-Moor in Nagano prefecture shows that the natural stand of Hinoki in the area was formed approximately 7,000 years ago and remains predominant to date.(2) The analysis of the peat deposits at Karakemi-Moor in Nagano prefecture shows that the natural stand of Hinoki in the area was formed approximately 25,000 years ago (late glacial maximum) and Pinus maintains predominance to date.(3) The analysis of the peat deposits at Oahara-Moor in Nagano prefecture shows that no natural stand of Hinoki was recognized in the area even after the late glacial maximum.(4) The analysis of the peat deposits at the moor of Nawagaike, Shirokimine, Ikenohira, Kaminokodaira and Midagahara in Toyama prefecture shows that no natural stand of Hinoki was recognized in those areas even after post glacial period.As may be clear from the above, the formation and changes of Hinoki forests is not uniform but diverse in different areas.

通过对更新世以来日本中部扁柏林的形成和变化的研究，为扁柏造林、森林环境保护和自然环境保护等重要问题提供原始资料。在12个点钻孔收集的泥炭沉积物作为材料，对其进行花粉分析。观察结果的概要如下：1.本文用普通光学显微镜和电子显微镜对柏科四个属--通过对它们的形成时间的评估，确认了以下3种类型的桧木森林的存在：（1）对长野县忠立沼泽的泥炭沉积物的分析表明，该地区的桧木天然林形成于大约7,000年前，至今仍占主导地位。(2)对长野县Karakemi-Moor泥炭沉积物的分析表明，该地区的天然扁柏林形成于约25，000年前（晚冰期最大期），松树至今仍占主导地位。(3)对长野县大原沼泽泥炭沉积物的分析表明，即使在晚盛冰期之后，该地区也没有发现天然的扁柏林。(4)通过对富山县名湖池、白峰、池之平、上之平和Midagahara等地的摩尔沼泽泥炭沉积物的分析，表明即使在冰后期，这些地区也没有发现天然的桧木林，由此可见，不同地区的桧木林的形成和变化是不一致的，而是有差异的。