Title: Resource competition of Cyanobacteria, Chlorococcalesa and diatoms for ammonium ions under steady and non-steady state

Authors: Su Wen Yang, Xiang Can Jin

Addresses: Beijing Normal University, Beijing 100875, China; Research Center of Lake Environment, Chinese Research Academy of Environment Sciences, Beijing 100012, China. ' Research Center of Lake Environment, Chinese Research Academy of Environment Sciences, Beijing 100012, China

Abstract: Cyanobacteria, Chlorococcalesa, and diatoms were investigated on competing characteristics under limited ammonium in steady and non steady state. Results showed that M. aeruginosa, S. quadricauda, and N. palea coexisted at all series of ammonium concentration in steady state. M. aeruginosa and S. quadricauda coexisted at per day, per-2-day, and per-4-day supply modes. M. aeruginosa dominated at per-8-day mode where S. quadricauda and N. palea were washed out. Monod model can predict the competing results only at quite low N concentration, while Droop model can exactly explain the results at most of N concentrations in laboratory.

Keywords: resource competition; Cyanobacteria; Chlorococcalesa; diatoms; ammonium ions; cell quota; steady state; non-steady state; water bloom; algae succession; lakes; modelling; water pollution; water quality.

DOI: 10.1504/IJEP.2010.036933

International Journal of Environment and Pollution, 2010 Vol.43 No.4, pp.364 - 376

Published online: 16 Nov 2010 *

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