The impact of the 2003 summer heat wave and the 2005 late cold wave on the phytoplankton in the north-eastern English Channel

Comptes rendus biologies
Fernando Gómez, Sami Souissi

Abstract

The phytoplankton composition was investigated at two fixed stations in the north-eastern English Channel from November 1997 to December 2005. The warmest temperatures in European historical records were recorded in August 2003. This event was associated with an exceptional abundance peak of the dinoflagellates Akashiwo sanguinea (9600 cells L(-1)) and Ceratium fusus. The lowest February temperatures for the 1998-2005 period were recorded in 2005, coinciding with the absence, for the first time in recent decades, of the spring bloom of Phaeocystis globosa. The 'de-eutrophication', mainly the reduction of river nutrient loads, is progressively reducing the magnitude of the Phaeocystis blooms. Exceptionally in 2005, the colder temperatures increased water column mixing, favouring the dominance of tychoplanktonic diatoms until early March (pre-bloom period). The delay in spring stratification, lower light availability due to turbidity (resuspended sediment) and organic matter, and competition with tychoplanktonic diatoms contributed to retard the timing of the spring phytoplankton bloom and disadvantage the development of Phaeocystis. The summer 2003 European heat wave is expected to have had little influence on total annual prima...Continue Reading

References

Feb 5, 2008·Comptes rendus biologies·Jean-Marie RobineFrançois Richard Herrmann

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Citations

Apr 21, 2010·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Margreth KeilerStephan Harrison
Mar 3, 2019·Nature Communications·Jacob ScheweLila Warszawski
Jul 31, 2021·Environmental Monitoring and Assessment·Andressa da Rosa WieliczkoLucia Ribeiro Rodrigues

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