Physiological responses of phytoplankton to the periodic changes of environment during water bloom in Nanhaizi Lake of Beijing
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Abstract:
Alg ae liquid w as taken fr om the Nanhaizi Lake during the bloom course and w as put into t he pho tobio reactor FMT150 and cultur ed under diff er ent co nditions. The results show ed that ( 1) under the 122hour per iodic cultivatio n co ndit ions, the dis2 so lved ox yg en, carbon diox ide, chlor ophy ll f luor escence of alg ae so lution appear w ith a 122hour per io dic response, and OD680 show s the daily perio dicity of 24 ho urs; and ( 2) after 12 hours, the perio dic conditio ns wer e changed to t he const ant conditio ns, chloro phy ll fluor escence show s the 122ho ur per iodicit y at first and then t he periodicity sta rts to increase gr adually. The r esults sug gested that periodicity ex ists in the community o f phy toplankton.
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