2024-03-28T10:00:22Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1082232020-12-13T08:59:41Zcom_10261_123com_10261_8col_10261_376
DIGITAL.CSIC
author
Bolli, Linda
author
Llaveria, Gisela
author
Garcés, Esther
author
Guadayol, Òscar
author
Lenning, K. van
author
Peters, Francesc
author
Berdalet, Elisa
2014-12-01T12:42:26Z
2014-12-01T12:42:26Z
2007-03-23
Biogeosciences Discussions 4: 893-908 (2007)
http://hdl.handle.net/10261/108223
10.5194/bgd-4-893-2007
In some dinoflagellate species, physiological processes appear to be altered by exposure to certain turbulent conditions. Here we investigated how two levels of turbulent kinetic energy dissipation rates (ε = 0.4 and 27cm2s-3) affected the toxin and ecdysal cyst dynamics of two bloom forming species, Alexandrium minutum and A. catenella. The most striking responses were observed at the high s generated by an orbital shaker. In A. catenella, lower cellular toxin content was measured in cultures shaken for more than 4 days. The same trend was observed in A. minutum, although variability masked statistical significance. For the two species, inhibition of ecdysal cyst production occurred immediately and during the period of exposure of the cultures to stirring (4 or more days) at any time during their growth curve. Recovery of cyst abundances was always observed when turbulence stopped. When turbulence persisted for more than 4 days the net growth rate significantly decreased and the final biomass yield was lower than in the unshaken cultures. This study suggests that high levels of small-scale turbulence would contribute to the modulation of the harmful bloom dynamics through the interaction at the level of toxin and encystment processes
eng
openAccess
Modulation of ecdysal cyst and toxin dynamics of two Alexandrium (Dinophyceae) species under small-scale turbulence
artículo
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https://digital.csic.es/bitstream/10261/108223/1/Bolli_et_al_2007.pdf
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Bolli_et_al_2007.pdf
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https://digital.csic.es/bitstream/10261/108223/5/Bolli_et_al_2007.pdf.txt
File
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Bolli_et_al_2007.pdf.txt