Effects of elevated pCO2 on the nitrification activity of microorganisms in marine sediment

Nitrification is a process of nitrogen cycle, that is reacted by microbial organisms and is appeared anywhere in the sediment and water column in ocean environment. We assessed the effect of elevated pCO2 on the nitrification of the sediment in Osaka bay, Japan. Ammonium oxidation activity among the nitrification process was suppressed by the elevated pCO2. On the other hand the quantity and the diversity of amoA gene, which is the specific coding of the ammonium oxidation, were not affected by elevated pCO2. Microbial activity such as ammonium oxidation could be a useful tool for detecting CO2 leakage because of its common existence in the ocean.

Hayashik M., Kita J., Watanabe Y. & Shimamoto A., 2013. Effects of elevated pCO2 on the nitrification activity of microorganisms in marine sediment. Energy Procedia 37: 3424–3431. Article (subscription required).


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