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Effects of Environmental Factors on the Uptake Rates of Dissolved Nitrogen by a Salt-water Green Alga (Oocystis borgei Snow)

Abstract

Uptake rates for dissolved nitrogen (DN) by a marine alga (Oocystis borgei) were examined in a 15N tracer experiment. Maximal uptake rates for all forms of DN were observed at temperatures between 25 and 30°C and at algal concentrations between 3.22 × 108 and 4.78 × 10cell L−1. Light intensity required to achieve the maximal uptake rate was 45 μmol m−2 s−1 for dissolved inorganic nitrogen (DIN = NO3 , NO2 , NH4 +) and methionine, and 126 μmol m−2 s−1 for urea. Salinity required to achieve the maximal uptake rate was 12.85 ppt for DIN, 19.89 ppt for urea and 26.2 ppt for methionine.

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Acknowledgments

This study was supported by the Ministry of Science and Technology of China (Grant #2010GB2E000351) and Science and Technology Program of Guangdong Province of China (Grant #2010B060200011, 2009B020312013 and 2006A20305003).

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Correspondence to Meihua Zhou.

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Huang, X., Li, X., Wang, Y. et al. Effects of Environmental Factors on the Uptake Rates of Dissolved Nitrogen by a Salt-water Green Alga (Oocystis borgei Snow). Bull Environ Contam Toxicol 89, 905–909 (2012). https://doi.org/10.1007/s00128-012-0767-8

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Keywords

  • Dissolved nitrogen
  • Environmental factors
  • Oocystis borgei
  • Uptake rate