Increases in the grown rate of peat larevers and the controlling factors during the late Holocene, in the case of mountains in the Western Japan

全新世晚期泥炭沼虾生长速度的增加及其控制因素——以日本西部山区为例

• 批准号: 06680162
• 负责人: SOHMA Hidehiro
• 金额: $ 1.22万
• 依托单位: Nara Women's 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06680162/
• 关键词: moor; growth rates of peat layrs; late Holocene; snowy mountains; Wenstern Japan; paludification; 無機物の混入率; 西日本; 八幡原湿原; 大フケ湿原; 4000年頃; 沼原湿原

It is known that the growth rates of peat layrs in the moors, situated in the snowy mountains of Northeastern Japan, have increased by Paludification during the late Holocene. In this research, changes in the growth rate of peat layrs in the moors, situated in the mountains of Western Japan which has less snow-fall and low elevation compared with those of Northeastern Japan. Using the "wash-out method" and l4C dating of the peat layrs, following results are obtained.1.In the Yahata Moor, situated in the northern part of Hiroshima Perfecter, growth rate in the latter half of the Holocene was larger than that in the former. But the large peat-accumulation, following the increase of the Pinus pollen which considered to be caused by the artificial deforestation, suggests occurring of increase in the peat growth delayd from North-eastern Japan.2.In the Hosoike Moor, situated in the northern part of Okayama Perfecter, the growth rate of peat layr at the marginal part where bank and hollow complex has developed, increased after 1500-2000 years ago.3. It may be given as a conclusion that starting of the rapid peat growth during the late Holocene in the mountains of Western Japan was sharply delayd from that in North-eastern Japan, because of less snow-fall, low elevation and artificial effects.

据了解，泥炭层的增长率在沼泽，位于日本东北部的雪山，增加了沼泽化在晚全新世。在这项研究中，泥炭层的生长速度的变化，位于山区的降雪量少，海拔低的西日本东北部相比，在沼泽。本文采用“冲刷法”和泥炭层的~（14）C测年方法，得到以下结果：（1）在广岛湾北方的八幡摩尔沼泽中，全新世后半期的生长速率大于前半期。但是，随着松花粉的增加，泥炭大量堆积，这被认为是人为砍伐森林造成的，这表明日本东北部泥炭生长延迟。2.在位于冈山完善北方的细池摩尔，在河岸和洼地复合体发育的边缘部分，泥炭层的生长速度，1500-2000年后增加。3.这表明，由于降雪量少、海拔低和人为因素的影响，日本西部山区晚全新世泥炭快速生长的开始时间比日本东北部晚得多。