Articles | Volume 22, issue 13
https://doi.org/10.5194/bg-22-3397-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-3397-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
11 Jul 2025
Research article |
| 11 Jul 2025
| 11 Jul 2025
Extraordinary bloom of toxin-producing phytoplankton enhanced by strong retention on the offshore Patagonian shelf
Valeria Ana Guinder
CORRESPONDING AUTHOR
Instituto Argentino de Oceanografía (IADO), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Sur (UNS), Camino La Carrindanga km 7.5, 8000 Bahía Blanca, Argentina
Urban Tillmann
Alfred-Wegener-Institut (AMI), Helmholtz Zentrum für Polar- und Meeresforschung, Am Handelshafen 12, 27570 Bremerhaven, Germany
Martin Rivarossa
Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), and CONICET, Paseo Victoria Ocampo, Escollera Norte 1, B7602HSA Mar del Plata, Buenos Aires, Argentina
Carola Ferronato
Instituto Argentino de Oceanografía (IADO), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Sur (UNS), Camino La Carrindanga km 7.5, 8000 Bahía Blanca, Argentina
Fernando J. Ramírez
Instituto Argentino de Oceanografía (IADO), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Sur (UNS), Camino La Carrindanga km 7.5, 8000 Bahía Blanca, Argentina
Bernd Krock
Alfred-Wegener-Institut (AMI), Helmholtz Zentrum für Polar- und Meeresforschung, Am Handelshafen 12, 27570 Bremerhaven, Germany
Haifeng Gu
Third Institute of Oceanography (TIO), Ministry of Natural Resources, Xiamen, 361005, China
Martin Saraceno
Centro de Investigaciones del Mar y de la Atmósfera (CIMA), CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), C1063ACV, Buenos Aires, Argentina
Instituto Franco-Argentino de Estudio sobre el Clima y sus Impactos (IFAECI) CNRS-IRD-UBA-CONICET, Buenos Aires, Argentina
Departamento de Ciencias del Océano y de la Atmósfera (DCAO), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), C1063ACV, Buenos Aires, Argentina
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Ophélie David, Pjotr Meyvisch, Haifeng Gu, Gwenael Bilien, Dave Clarke, Fabienne Marret, and Kenneth N. Mertens
J. Micropalaeontol., 45, 547–576, https://doi.org/10.5194/jm-45-547-2026, https://doi.org/10.5194/jm-45-547-2026, 2026
Short summary
Short summary
By combining incubation experiments, microscopy, biomolecular analyses, and spectroscopy to assess the biomacromolecular composition of cyst walls, we show that Selenopemphix and Multispinula represent two distinct cyst-based genera, with different preservation potentials. We emend their diagnoses and describe two new Multispinula species, M. varispinosa sp. nov. and M. robusta sp. nov., in addition to M. quanta.
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Short summary
An unusual survey involving two vessels in the Argentine Sea over a 10 d period enabled synoptic observations of a significant toxic phytoplankton bloom. Simultaneous species characterization of the bloom, along with measurements of surface currents and mesoscale fronts, provided insights into its retention. Interdisciplinary approaches shed light on the biophysical coupling that underlies the persistence and horizontal transport of harmful algal blooms in productive continental shelves.
An unusual survey involving two vessels in the Argentine Sea over a 10 d period enabled synoptic...
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