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Carbon, Nitrogen and Phosphorous Contents and Storages in the Marsh Sediments of the Minjiang River Estuary

Author: JiaRuiXia
Tutor: ZuoChuan
School: Fujian Normal University
Course: Physical Geography
Keywords: sediment C、N、P contents and storages Phragmites australis Cyperus malaccensis Scirpus triqueter Kandelia candel Minjiang River estuary
CLC: P595
Type: Master's thesis
Year: 2009
Downloads: 165
Quote: 8
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Abstract


The Minjiang River estuary is a typical open tidal estuary in the southeast of China, lots of material and energy flow pass through this area. This article mainly studied C, N and P contents and storages in the sediments of the Shanyutan wetland which is the biggest salt marsh wetland in the Minjiang River estuary area, and also the Bianfuzhou reed wetland and the Youxizhou reed wetland. The results indicated: （1） The TOC, TN and TP contents and storages of the sediments under Scirpus triqueter in the section near the tide ditch were higher significantly than that in the ares far from the tide ditch, however, for the Phragmites australis and Cyperus malaccensis wetlands, the TOC, TN and TP contents of the sediments in the sections far and near the tide ditch were similar; （2） The TOC, TN and TP contents and storages of the sediments under Kandelia candel mangrove forest patch were similar to that under Phragmites australis and Cyperus malaccensis in the higher tital zone, but were higher than that under Scirpus triqueter in the lower tital zone; （3） TOC and TN contents and storages of the sediments under Phragmites australis in the Shanyutan wetland were higher than that in the Bianfuzhou reed wetland and the Youxizhou reed wetland, TP contents and storages of the sediments of the Bianfuzhou wetland were highest in the three studied reed wetlands; （4） The TOC contents in the sediments under the three herbaceous plants all had a significant positive correlation with the moisture, and a negative correlation with the bulk density in the Shanyutan wetland. （5） NH4+-N is the main form of the inorganic nitrogen in study area, the proportions of average NH4+-N contents in sediments at a depth of 0～60cm accounted for 0.29%～2.07% of the TN contents in Minjiang estuary wetland. （6） If the TOC/ TN > 12 is the standard designated land-based organic matter, the TOC/ TN <8 is the standard designated as the sea-based organic matter, the organic matter in Minjiang estuary wetland sediments is mainly derived from terrestrial.

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