有明海奥部の干潟・浅海域底泥における窒素・リンの季節変化 Seasonal Variations of Nitrogen and Phosphorus in Bottom Sediment of Tidal Flat and Shallow Water Areas in the Interior Parts of the Ariake Sea

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Author(s)

Abstract

The seasonal variations of nitrogen and phosphorus in bottom sediments of tidal flat and shallow water areas in the interior parts of the Ariake Sea were investigated during August, 2007-July, 2008. The supply amount of organic matter to sea bottom and sediment temperature had important effects on the seasonal variations of NH<sub>4-</sub>N in porewater. NO<sub>3-</sub>N in porewater was significantly influenced by denitrification and NH<sub>4-</sub>N in porewater that is substrate of nitrification. The seasonal variations of PO<sub>4-</sub>P in porewater were strongly dependent on those of redox environments in bottom sediment. The release rates of NH<sub>4-</sub>N and PO<sub>4-</sub>P were estimated by the diffusion equation. It was found that bottom sediment was an important supply source of NH<sub>4-</sub>N and PO<sub>4-</sub>P during summer-autumn.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 65(1), 1031-1035, 2009

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130004956204
  • Text Lang
    ENG
  • ISSN
    1884-2399
  • Data Source
    J-STAGE 
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