权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

第四紀前期更新世におけるビナ林の進化過程

第四纪早更新世比拉森林的演化过程

基本信息

批准号：
06854055
负责人：
百原新
金额：
$ 0.45万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Encouragement of Young Scientists (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至无数据
项目状态：
已结题

项目摘要

ブナ(Fagus crenata)が中部日本で種分化し、ブナ林を形成する過程を復元するために、新潟県十日町の鮮新・更新統魚沼層群の植物化石群を層序学的に検討した。鮮新世末(約200万年前)から第四紀前期更新世末(約80万年前)の地層から植物化石を採取するとともに、植物化石含有層の層相を検討して、植物化石相と古植生を復元した。さらに、十日町周辺の地層の層相変化を時代的空間的に追跡して、植生が成立した堆積盆とその周辺の古地形を復元した。化石ブナ属は現世ブナと、殻斗の小さいヒメブナ(Fagus microcarpa)が含まれる。ヒメブナは、約200万年前から約110万年前までのほとんどの植物化石群に含まれており、産出個数も多かった。約110万年前以降では、化石群の種構成から温暖期と考えられる層準には含まれているが、寒冷期の層準からは産出しなかった。一方、ブナは約110万年前以降の植物化石群でヒメブナとともに産出したが、ブナが出現しはじめる層準では、ブナとヒメブナの中間の形態の殻斗が産出した。約200万年前から約110万年前まで、ヒメブナは沖積平野の植生の主要構成種で、優占種として存在していた可能性がある。約110万年前以降、氷期一間氷期の気候変化が激しくなると、ヒメブナは間氷期に分布拡大した。ブナは約110万年以降にヒメブナから種分化した可能性がある。ブナが出現する層準は、メタセコイアの絶滅や、オニグルミの種分化がおきた層準と一致し、植物化石群の種構成も大きく変化する。植物化石と地質学的資料から、約110万年前以降の気候変化と海水準変動、そして、中部山地周辺で起こった山地の隆起による古地形の変化によって、低地性のヒメブナから山地性のブナへの種分化が促されたと考えられる。

There are several kinds of differentiation in central Japan (Fagus crenata), and the forest has formed a sequence of phytochemical taxonomy of the plant fossil group of the newly updated marsh group in the town of Ten days. At the end of the Pleistocene (about 2 million years ago), at the end of the fourth period, at the end of the Pleistocene (about 800000 years ago), the fossils of plants were collected from the fossils of plants, the fossils of plants were collected from the fossils of plants, the fossils of plants were collected from the fossils of plants, and the fossils of plants were collected from the fossils of plants. On the 10th, during the week of the town, the space of the city was transformed into the space of the Qing Dynasty, and the plant was set up to actively collect the ancient topography of the city. The fossil oysters belong to the Epoch era, and the small ones (Fagus microcarpa) of the fossils belong to the genus Dudou. Some 2 million years ago, and about 1.1 million years ago, the phytochemical group was divided into several groups, and the number of cases was more than one. About 1.1 million years ago, the fossils were formed into a warm period, a warm period, a cold period and a cold period. On the one hand, about 1.1 million years ago, the phytochemical community was used to treat the disease, and it was found that there was a high level of environmental pollution in the plant chemical group, and that there was a high level of environmental pollution in the middle of the plant. About 2 million years ago, about 1.1 million years ago, the plants in Hirano were mainly formed into plants, and there was a possibility that there was a significant difference between plants and plants. About 1.1 million years ago, there was a large distribution of climatic weather events in one season, one season, one week, one week, one It has been around for 1.1 million years to reduce the possibility of differentiation. It was found that the levels of differentiation and differentiation of different types of plant fossils were consistent, and that the phytochemical groups were formed into a large scale. The data of fossil plant geochemistry, about 1.1 million years ago, climate change, climate change, sea water preparation, climate change, mountain uplift, paleo-topography, low-land climate, mountain climate, mountain climate, climate