Rivers, as they flow to the sea they carry with them sediments. Sediment transportation is dominant in the upland flows where the velocity or speed of the river flow is very fast and the slope is of a steep type. As the sediments are carried along to the lowland, the water velocity is reduced and so there is a reduction in the speed of the river flow and also the slope is of a gentle sloping thus causing the sediments to be deposited on the lower parts of a river. The Rewa River is one of the largest rivers in Fiji and so the scale of sedimentation is greater and the rate of sedimentation is faster than smaller streams. The river also meets the open sea where the river flow is being disturbed be the sea currents and so sediments are deposited where the river meets the sea. The continuous process of sedimentation and the accumulation of sediments along the Rewa river mouth cause the formation of small islets to be formed and over time developed into small islets.
Nasoata Islet is located on the Rewa delta and is formed by the fluvial processes of the Rewa River causing it after time to become what it is today; the Nasoata Islet. The overall composition of sediment in Nasoata Islet determines the types of plant species to be found there and that the main biodiversity to be found is mainly composed of coastal or marine vegetation, where the main ecosystems to be found are mainly the mangrove ecosystem, the coastal littoral forest and beach ecosystem and the intertidal flat and seagrass ecosystem. This essay will be featuring the status of the coastal and nearshore biodiversity, horizontal zonation and the interconnectivity between them.
Nasoata Islet which means “place of the pumice (soata)” got its name due to the broad deposition of pumice substrates that was deposited there due to the high seas
Bibliography: Boaden, JS & Seed, R 1985, An Introduction to Coastal Ecology, Blackie & Son Ltd, London. Thaman, RR, Fong, T, Veitata, S, Bukarau, S, Buinimasi, S, Robinson, S 2010, VASCULAR PLANTS OF THE UNIVERSITY OF THE SOUTH PACIFIC, LAUCALA BAY CAMPUS, SUVA, FIJI ISLANDS, The University of the South Pacific, Suva, Fiji Islands.