融雪期のコムケ湖干潟における溶存有機物と栄養塩の分布・変動特性

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タイトル別名
  • DISTRIBUTION AND VARIATION OF DISSOLVED ORGANIC MATTER AND NUTRIENT IN SNOWMELT SEASON IN TIDALFLAT IN LAKE KOMUKE
  • ユウセツキ ノ コムケコ ヒガタ ニ オケル ヨウゾンユウキブツ ト エイヨウエン ノ ブンプ ・ ヘンドウ トクセイ

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 Dissolved organic matter was measured by using Fluorescence Spectroscopy (FS) along with salinity from snowmelt season to summer at a tidal flat in Lake Komuke at the northeast of Hokkaido. Seasonalities of dissolved nitrogen and phosphorus concentrations were also examined to clarify the dynamics of nitrogen and phosphorus in sediment-water interfaces. Salinity decreases during the snowmelt season, and FS revealed that fulvic acid-like and humic acid-like fluorescence intensities were higher in sediment pore water than in surface water especially in tidepool due to accumulation of organic matter production. It is likely that NH4-N and PO4-P concentrations in surface sediment were mainly affected by redox condition change triggered by tidal action and infiltration flow in shore side.

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