C, N, P Composition of Suspended Matter in Matang mangrove Estuary, Malaysia
Distribution of suspended matter and its chemical composition were investigated in the Sangga Besar River Estuary in Matang Mangrove Forest, Malaysia. The C, N contents were higher in the upper part of the river and decreased towards the river mouth. Phosphorus content was as high as 129 μmol/g in the fresh water area, in which inorganic phosphorus accounted for about 70% of the total. Potentially bio-available phosphorus extracted by the citratedithionite-bicarbonate procedure (CDB-P) was the major component of inorganic phosphorus. Phosphorus content in the suspended matter decreased linearly with salinity, reflecting the process of CDB-P release from suspended matter into the estuarine water during the transportation to the sea. The average C: N: P atomic ratio of the organic substances contained in the suspended matter in the estuary was estimated to be 140 : 16 : 1, which is considerably different from the ratios for mangrove litter and rather similar to the Redfield ratio, indication the higher contribution of living microorganisms than that of the mangrove litter.
|作成者||Katsuhisa TANAKA Kazuo SUGAHARA Yoshinari OHWAKI Poh-Sze CHOO|