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

涨潮时海水淹没，退潮时干涸的红树林沼泽，甚至在日本西南诸岛也有分布。在河口、海湾和河口的泥滩区形成了红树林群落。认为海陆边界场不仅对生物的保护、陆域的形成和自然环境的净化起着重要的作用，而且对渔业资源的培育、国土的养护和环境的保护也起着重要的作用。本研究的目的是研究红树沼泽泥滩区陆地部分的形成机制、地表物质的沉积物质以及石崎岛福东河涨潮和退潮时漂浮的胶体颗粒的运动和性质。群落沉积物表面物质的矿物组成变化较小，红树林比河流多。群落中河底至中游地区矿物组成呈稳定趋势。总体上发现，河流和群落沉积物表层物质中原生矿物和次生矿物的含量特征与内陆表层土壤和海洋沉积物中原生矿物和次生矿物的含量特征基本相似。然后，矿物成分的质量和数量的区别反映在河流和红树林沼泽群落沉积物的特征上。涨潮和退潮时漂浮的胶体颗粒的物质和特征与红树林沼泽泥滩区表层沉积物相似。根据这些趋势，认为河流水体、红树林沼泽和森林中的生物在白天的某些活动、红树林边缘的大量有机物含量与风的强弱等气候条件之间存在相互作用。在红树林沼泽群落中，除了海水的涨落外，雨水和波浪对沉积反应和陆生部分的形成也有很大的影响。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