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Field measurements were conducted to examine the relationship between species distribution along a band transect of 280 m and soil redox potential (Eh) and sulphide patterns, as well as the indirectly related (through flooding regimes) soil salinity. Of the three major species <i>Avicennia marina, Ceriops tagal</i> and <i>Rhizophora mucronata</i> present along the transect, only the distribution of the latter correlated with the measured soil variables, <i>R. mucronata</i> being absent from the less-reduced zone with high salinity. <i>Bruguiera gymnorhiza</i> and <i>Heritiera littoralis</i> occur in minor populations, they are restricted to the saline, sulphide-poor and less-reduced substrates. 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