DIN Fixation by Macroalgae and Release from Sediment by the Burrowing <i>Macrophthalmus japonicus</i>

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  • ヤマトオサガニの造巣活動に伴う底質から水中へのDIN回帰と藻類による固定
  • ヤマトオサガニ ノ ゾウソウ カツドウ ニ トモナウ テイシツ カラ スイチュウ エ ノ DIN カイキ ト ソウルイ ニ ヨル コテイ
  • DIN Fixation by Macroalgae and Release from Sediment by the Burrowing Macrophthalmus japonicus

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Abstract

The relationship burrows of Macrophthalmus japonica and utilization DIN by microphytobenthos in river mouth tidal flat was evaluated. Seasonal variation and temporal variation about DIN for one tide were investigated in the crab burrows. Though dissolved oxygen decreased during ebb tide for respiration by crab and organic decomposition, NH4+-N in the burrows increased for metabolism by crab and elution from wall surface. Burrows supplied DIN for tidal flat area in flood tide and microphytobenthos efficiently assimilated DIN. It found that burrows served DIN for microphytobenthos as fertilizer application.

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