We used laboratory experiments covering a wide range of carbon dioxide (CO2) induced seawater acidification to simulate ocean CO2 storage and assess the potential effects on heterotrophic microbial processes associated with labile dissolved organic matter (DOM). There was no noticeable effect of increased CO2 concentration on short-term decomposition of labile DOM or nutrient uptake. However, microbial activities producing “new” DOM were apparently enhanced under treatments with 2000 or 5000 ppm CO2. Under these conditions, production of aggregates was inhibited in early stage. Both of acute and chronic effects should be included for assessment of biogeochemical cycle related to microbe process.
Yamada N., Tsurushima N. & Suzumura M., 2013. Effects of CO2-induced seawater acidification on microbial processes involving dissolved organic matter. Energy Procedia 37: 5962–5969. Article (subscription required).