Abstract
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Two areas of non-tidal mangrove are described. Prospect and South sound mangrove swamps. The vegetation of these swamps resembles that of tidal mangrove swamps. Initial establishment and subsequent expansion of mangroves have occurred during the Late Holocene as the island has undergone relative submergence. The formation of beach ridges totally isolated the swamps and altered their flooding regime. Flooding at present is seasonal and by freshwater, following high rainfall, and the swamps gradually drain through the dry season. Not only have the growth of mangrove species and the accumulation of peat continued in these isolated mangrove swamps, but accretion of the swamp substrate has been more rapid because direct tidal flushing, and consequently tidal export of organic matter, is absent and decomposition is less rapid.-from Author