Movements and properties of colloidal particles floating with the ebb and flow of the sea in the mangrove swamp

甚至在日本西南部岛屿上，也分布着涨潮时被海水淹没、低潮时干涸的红树林沼泽。在河口、海湾和河口的泥滩区形成了红树林群落。认为海陆界面场不仅在保护生物、形成陆地、净化自然环境等方面起着重要作用，而且在渔业资源培育、国土保护和环境保护等方面也发挥着重要作用。本研究的目的是研究红树林沼泽泥滩区陆地部分的形成机制、表层物质沉积的物质以及漂浮在石垣岛福岛江涨潮和低潮的胶体颗粒的运动和性质。沉积物表面物质的矿物组成在群落…中变化较小与其说是在河里，不如说是红树林。群落中的河流中下部存在矿物组成趋于稳定的趋势。结果表明，河流和群落表层物质中含有的原生和次生矿物的特征与内陆表层土壤和海洋沉积物中的基本相似。红树林沼泽河流沉积物和红树林沼泽群落的特征也反映了矿物组成在质和量上的差异。红树林沼泽滩涂浮游胶体颗粒的物质和特征与红树林沼泽滩涂表层沉积物的物质和特征相似。据此认为，河流、红树林和森林水体中生物白天的某些活动、红树林边缘含有的大量有机质和风雨浪的强弱气候条件以及海潮涨落对红树林群落的沉积反应和陆地部分的形成具有重要的影响。较少

Mangrove swamps which were flooded with sea water in high tide and dried up in low tide, have distributed even in the southwest islands of Japan. A community of mangrove is formed on the mudflat area of inlet, bay and the mouth of a river. It is considered that the boundary field between sea and inland areas not only play an important role in the protection of living things, the formation of terrestrial parts and the purification of natural environment, but also play in the cultivation of fisheries resources, the conservation of national land and the preservation of environment.It was the purpose of the present in vestigation to study on the mechanisms forming terrestrial parts, the substances of surface material sedimenting on the mudflat area in mangrove swamp in addition to the movements and properties of colloidal particles floating both high and low tide in Fukito River at Ishigaki Island.Mineral compositions of surface material on sediment showed smaller variation in the communit … More y of mangrove than in river. The tendency to ward a steadiness in mineral composition was found the under to middle side areas of river in the community. It was found in general that the characteristics of primary and secondary minerals containing in surface material on sediment in the river and community are almost similar to that of containing in surface soil on inland and sediment in the sea. And then, the distinction in the quality and quantity of the mineral constituents was reflected in the characteristics of those sediments in the river and community in mangrove swamp. The substances and characteristics of colloidal particles floating both high and low tide were similar with those of surface sediment on the mudflat area in mangrove swamps. From these tendency, it was suggested that the interaction of among some activities in daytime of the living things inhabiting in water of the river, the mangrove swamp and forest, a great deal of organic matter containing on near the edge from mangrove forest and the climatic conditions in strength or weakness of wind, rain and wave in addition to the ebb and flow of the sea should be the great in fluence on the sedimentation reaction and the formation of terrestrial parts in the community of mangrove swamp. Less