

FOLLOWUS
1. East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences
2. State Key Laboratory of Estuarine and Coastal Research East China Normal University
Online First:20 May 2010,
Published:2010
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Li, Y., Li, D., Fang, T. et al. Tidal effects on diel variations of picoplankton and viruses in the Changjiang estuary., Chin. J. Ocean. Limnol. 28, 435–442 (2010). https://doi.org/10.1007/s00343-010-9044-z
Spatial distributions and seasonal variations of picoplankton (i.e. Synechococcus spp.
Prochlorococcus spp.
picoeukaryotes and heterotrophic bacteria) and viruses in the Changjiang estuary have been reported in the past. However
short-term variations (e.g. at a tidal timescale) of these organisms and their regulating factors remain unclear. We determined the time-series of fluctuations of picoplankton and viruses with tide simultaneously in flow cytometry in the Changjiang estuary during a cruise in June 2006
in which a tidal model based rectangle equation was applied. The results indicate that high cell abundances of picoplankton and viruses occurred during flood tide and low cell abundances during ebb tide. The period of the surface cell abundance variations was about 13 h
suggesting the surface cell abundances in the Changjiang estuary were largely regulated by tide. However
cell abundances in middle and bottom waters varied in different periods due to influences of tidal induced physical forces such as resuspension and stratification. Therefore
tidal action is an important factor for the diel variations of picoplankton and viruses in the Changjiang estuary.
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