Effect of mangrove restoration on nitrogen of surface sediment

The effects of mangroves restored with different species on nitrogen of coastal surface sediments were studied.Results showed that TN increase significantly after the mangrove restoration.Compared to nude flats,restoration of Sonneratia apetala and Sonneratia caseolaris(introduced) improved the contents of NH sub(4) super(+)-N and NO sub(x) super(-)-N of surface layer soils,which was entirely opposite to Aegiceras corniculatum and Kandelia candel(indigenous).When matter transfer between the surface sediment and the water in shore,different potential environmental effects of nutrient transport and exchange process may exist in the tidal flat sediment-water interface between introduced and indigenous mangrove restoration.