Surveys of the biotic communities and soils of the estuary, coastal area and reclaimed lands on the South and West Coast of Korea.

对韩国南部和西海岸河口、沿海地区和填海地区的生物群落和土壤进行调查。

• 批准号: 63043007
• 负责人: KURIHARA Yasushi
• 金额: $ 1.15万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Research
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63043007/
• 关键词: Korea; Reclaimed land; Tidal flat; Estuary; Biotic community; 土壌

Surveys of the biotic communities and soils were carried out at tidal flats and reclaimed lands on the South and West Coast of Korea, from September to October 1987. In this research, the organisms collected in the surveys were identified and the soil samples were subjected to physico-chemical analysis at the laboratory. Since acidification was found to pose no serious problem in a reclaimed land on the West Coast of Korea, the soil properties of the Seosan and Namyang reclaimed lands near Seoul were investigated in order to clarify the factors which have contributed to them. Their soil pH were found to be within the neutral to alkaline range, 6.9-8.9, irrespective of their different number of years since reclamation. A high level of exchangeable Ca is one characteristic of these soils, despite the small number of years since their reclamation and the fact that they have no history of Ca application. All layers (down to a 70 cm depth) showed that the final pH level measured after the soils had been oxidized with hydrogen peroxide was above 4.0, which suggests that they contain negligible amounts of pyrite and that a sharp decrease in soil pH following reclamation is unlikely. The surveys on brackish tidal flats were carried out at the Sinoeri, Namyang and Ogryudeung sand bar in the Nagdong river estuary. At the Sinoeri tidal flat with its large tidal range, a conspicuous zonation of macrobenthic animals related to water content, TC, TN and Eh of the sediments was observed along the slope from creek bottom to mound top. On the other hand, at the Ogryudeung tidal flat with a small tidal range, the noticeable zonation of macrobenthic animals was reflected in the presence of emergent plants such as Phragmites australis and Scirpus maritimus.

从1987年9月至1987年10月，在潮汐公寓进行了生物群落和土壤的调查，并在韩国南部和西海岸进行了回收土地。在这项研究中，确定了在调查中收集的生物体，并确定了土壤样品进行实验室的物理化学分析。由于发现在韩国西海岸的一块再生土地上发现酸化没有严重的问题，因此研究了Seosan和Namyang回收土地的土壤特性，以澄清对它们的贡献的因素。发现它们的土壤pH值在碱性范围内为6.9-8.9，无论其自开垦以来，它们的数量不同。尽管少数几年，并且它们没有CA应用史，但这些土壤的高水平CA是这些土壤的一个特征之一。所有层（降至70 cm的深度）都表明，用过氧化氢氧化后测得的最终pH水平高于4.0，这表明它们含有可忽略不计的黄铁矿，并且不太可能在接收后的土壤pH急剧降低。在Nagdong River河口的Sinoeri，Namyang和Ogryudeung Sand Bar上进行了微钻潮汐公寓的调查。在中央潮汐平坦的潮汐范围内，观察到与水含水，TC，TN和EH相关的大型动物的显着分区，从山顶到土墩顶部的坡度观察到沉积物的TC，TN和EH。另一方面，在具有较小潮汐范围的Ogryudeung潮汐平坦处，在存在诸如Phragmites Australis和Scirpus Maritimus之类的新兴植物的存在下，会反映出大型动物的明显分区。