ZHANG Naixing, SONG Jinming, CAO Conghua, REN Rongzhu, WU Fengcong, ZHANG Shaoping, SUN Xu. The influence of macronitrogen (NO3- and NH4+) addition with Ulva pertusa on dissolved inorganic carbon system[J]. Acta Oceanologica Sinica, 2012, (1): 73-82. doi: 10.1007/s13131-012-0178-z
Citation: ZHANG Naixing, SONG Jinming, CAO Conghua, REN Rongzhu, WU Fengcong, ZHANG Shaoping, SUN Xu. The influence of macronitrogen (NO3- and NH4+) addition with Ulva pertusa on dissolved inorganic carbon system[J]. Acta Oceanologica Sinica, 2012, (1): 73-82. doi: 10.1007/s13131-012-0178-z

The influence of macronitrogen (NO3- and NH4+) addition with Ulva pertusa on dissolved inorganic carbon system

doi: 10.1007/s13131-012-0178-z
  • Received Date: 2010-11-26
  • Rev Recd Date: 2011-03-02
  • The influence of macronitrogen (NO3- and NH4+) addition with Ulva pertusa on dissolved inorganic carbon system in seawater was studied. The results indicate that p (CO2) and HCO3- concentration decrease significantly, while pH and CO32- concentration increase significantly. When the concentration of NO3- was less than 71 μmol/dm3 or NH4+ was less than 49.7 μmol/dm3, dissolved inorganic carbon (DIC) absorption rates by Ulva pertusa generally increased with the increasing of nitrogen concentration. The DIC decreased 151 μmol/dm3 with the addition of 71 μmol/dm3 NO3- and decreased 232 μmol/dm3 with the addition of 49.7 μmol/dm3 NH4+ after the experiment compared with DIC measured without nitrogen addition. A significant negative-correlation was found between △c (DIC) and growth rate (μ) of Ulva pertusa (r=-0.91, P <0.000 1, n=11). NH4+ had more influence on the species of inorganic carbon system than NO3-.
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