Simultaneous estimates ofsynechococcus spp. Growth and grazing mortality rates in the English Channel

Ning Xiu-ren; Daniel Vaulot

doi:10.1007/BF02850534

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Simultaneous estimates ofsynechococcus spp. Growth and grazing mortality rates in the English Channel

Updated：2023-05-16

- Simultaneous estimates ofsynechococcus spp. Growth and grazing mortality rates in the English Channel
- Journal of Oceanology and Limnology Vol. 14, Issue 1, Pages: 8-16(1996)
- Affiliations：
  
  1. Second Institute of Oceanography
  2. Station Biologique de Roscoff CNRS
- Author bio：
- Funds：
- DOI：10.1007/BF02850534
  CLC：
- Published：1996
- Accepted：
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Xiu-ren, N., Vaulot, D. Simultaneous estimates ofsynechococcus spp. Growth and grazing mortality rates in the English Channel., Chin. J. Ocean. Limnol. 14, 8–16 (1996). https://doi.org/10.1007/BF02850534
DOI：

Xiu-ren, N., Vaulot, D. Simultaneous estimates ofsynechococcus spp. Growth and grazing mortality rates in the English Channel., Chin. J. Ocean. Limnol. 14, 8–16 (1996). https://doi.org/10.1007/BF02850534 DOI：

摘要

Abstract

The marine chroococooid phycoerythrin-containingSynechococcus spp. cyanobacterium has been implicated as a substantial component of the photosynthetic picoplankton in the ocean. Although its importance as food source for heterotrophic nanoplankton is now recognized

information about the cycling ofSynechococcus biomass and its diel pattern is limited and study methodology varies among authors. The selective metabolic inhibitor method was used to simultaneously estimate growth and grazing disappearance rates ofSynechococcus in the English Channel where growth rates ranged from 0.25 to 0.72/d (mean ±SD=0.51±0.17/d) and grazing mortality rates ranged from 0.19 to 0.64/d (mean ±SD=0.48±0.17/d). Size-fractionated experiments demonstrated that up to 70% ofSynechococcus disappearance could be attributed to grazers going through a 2 μm Nuclepore filter.Synechococcus grazing mortality rates (mean=0.74 ±0.25/d) during the day were always higher than that (mean=0.2±0.20/d) during the night

while growth rates showed no clear diel pattern. A positive correlation was observed between growth rates andin situ temperature ranging from 9 to 17°C

while in contrast grazing was independent of temperature. The close similatiry between average growth and grazing rates suggests a rapid recycling ofSynechococcus biomass in English Channel coastal waters.

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references

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