Wind-driven river plume dynamics and toxic Alexandrium tamarense blooms in the St. Lawrence estuary (Canada): A modeling study
In the lower St. Lawrence estuary (LSLE, eastern Canada), blooms of the toxic dinoflagellate Alexandrium tamarense are a recurrent phenomenon, resulting in paralytic shellfish poisoning outbreaks every summer. A first coupled physical-biological model of A. tamarense blooms was developed for this sy...
Published in: | Harmful Algae |
---|---|
Main Authors: | , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2008
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00833652 https://doi.org/10.1016/j.hal.2007.08.002 |
id |
ftccsdartic:oai:HAL:hal-00833652v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00833652v1 2023-05-15T18:18:59+02:00 Wind-driven river plume dynamics and toxic Alexandrium tamarense blooms in the St. Lawrence estuary (Canada): A modeling study Fauchot, Juliette Saucier, Franqois J. Levasseur, Maurice Roy, Suzanne ZAKARDJIAN, Bruno Laboratoire de sondages électromagnétiques de l'environnement terrestre (LSEET) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) 2008 https://hal.archives-ouvertes.fr/hal-00833652 https://doi.org/10.1016/j.hal.2007.08.002 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.hal.2007.08.002 hal-00833652 https://hal.archives-ouvertes.fr/hal-00833652 doi:10.1016/j.hal.2007.08.002 ISSN: 1568-9883 Harmful Algae https://hal.archives-ouvertes.fr/hal-00833652 Harmful Algae, Elsevier, 2008, 7, pp.214-227. ⟨10.1016/j.hal.2007.08.002⟩ Alexandrium tamarense coupled physical-biological model harmful algal blooms river plume dynamics St. Lawrence estuary SEA-ICE PHYTOPLANKTON BLOOM GROWTH GULF MAINE DINOPHYCEAE VARIABILITY MESOSCALE TRANSPORT BAY [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1016/j.hal.2007.08.002 2021-10-24T14:57:14Z In the lower St. Lawrence estuary (LSLE, eastern Canada), blooms of the toxic dinoflagellate Alexandrium tamarense are a recurrent phenomenon, resulting in paralytic shellfish poisoning outbreaks every summer. A first coupled physical-biological model of A. tamarense blooms was developed for this system in order to explore the interactions between cyst germination, cellular growth and water circulation and to identify the effect of physical processes on bloom development and transport across the estuary. The simulated summer (1998) was characterized by an A. tamarense red tide with concentrations reaching 2.3 x 10(6) cells L-1 along the south shore of the LSLE. The biological model was built with previously observed A. tamarense cyst distribution, cyst germination rate and timing, and A. tamarense growth limitation by temperature and salinity. The coupled model successfully reproduced the timing of the A. tamarense bloom in 1998, its coincidence with the combined plumes from the Manicouagan and Aux-Outardes (M-O) rivers on the north shore of the estuary, and the temporal variations in the north-south gradients in cell concentrations. The simulation results reveal that the interaction between cyst germination and the estuarine circulation generates a preferential inoculation of the surface waters of the M-O river plume with newly germinated cells which could partly explain the coincidence of the blooms with the freshwater plume. Furthermore, the results suggest that the spatio-temporal evolution of the bloom is dominated by alternating periods of retention and advection of the M-O plume: east or northeast winds favor the retention of the plume close to the north shore while west or north-west winds result in its advection toward the south shore. The response of the simulated freshwater plume to fluctuating wind forcing controls the delivery of the A. tamarense bloom from the northern part of the estuary to the south shore. In addition, our results suggest that a long residence time of the M-O plume and associated ... Article in Journal/Newspaper Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Canada Harmful Algae 7 2 214 227 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Alexandrium tamarense coupled physical-biological model harmful algal blooms river plume dynamics St. Lawrence estuary SEA-ICE PHYTOPLANKTON BLOOM GROWTH GULF MAINE DINOPHYCEAE VARIABILITY MESOSCALE TRANSPORT BAY [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
Alexandrium tamarense coupled physical-biological model harmful algal blooms river plume dynamics St. Lawrence estuary SEA-ICE PHYTOPLANKTON BLOOM GROWTH GULF MAINE DINOPHYCEAE VARIABILITY MESOSCALE TRANSPORT BAY [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Fauchot, Juliette Saucier, Franqois J. Levasseur, Maurice Roy, Suzanne ZAKARDJIAN, Bruno Wind-driven river plume dynamics and toxic Alexandrium tamarense blooms in the St. Lawrence estuary (Canada): A modeling study |
topic_facet |
Alexandrium tamarense coupled physical-biological model harmful algal blooms river plume dynamics St. Lawrence estuary SEA-ICE PHYTOPLANKTON BLOOM GROWTH GULF MAINE DINOPHYCEAE VARIABILITY MESOSCALE TRANSPORT BAY [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
In the lower St. Lawrence estuary (LSLE, eastern Canada), blooms of the toxic dinoflagellate Alexandrium tamarense are a recurrent phenomenon, resulting in paralytic shellfish poisoning outbreaks every summer. A first coupled physical-biological model of A. tamarense blooms was developed for this system in order to explore the interactions between cyst germination, cellular growth and water circulation and to identify the effect of physical processes on bloom development and transport across the estuary. The simulated summer (1998) was characterized by an A. tamarense red tide with concentrations reaching 2.3 x 10(6) cells L-1 along the south shore of the LSLE. The biological model was built with previously observed A. tamarense cyst distribution, cyst germination rate and timing, and A. tamarense growth limitation by temperature and salinity. The coupled model successfully reproduced the timing of the A. tamarense bloom in 1998, its coincidence with the combined plumes from the Manicouagan and Aux-Outardes (M-O) rivers on the north shore of the estuary, and the temporal variations in the north-south gradients in cell concentrations. The simulation results reveal that the interaction between cyst germination and the estuarine circulation generates a preferential inoculation of the surface waters of the M-O river plume with newly germinated cells which could partly explain the coincidence of the blooms with the freshwater plume. Furthermore, the results suggest that the spatio-temporal evolution of the bloom is dominated by alternating periods of retention and advection of the M-O plume: east or northeast winds favor the retention of the plume close to the north shore while west or north-west winds result in its advection toward the south shore. The response of the simulated freshwater plume to fluctuating wind forcing controls the delivery of the A. tamarense bloom from the northern part of the estuary to the south shore. In addition, our results suggest that a long residence time of the M-O plume and associated ... |
author2 |
Laboratoire de sondages électromagnétiques de l'environnement terrestre (LSEET) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Fauchot, Juliette Saucier, Franqois J. Levasseur, Maurice Roy, Suzanne ZAKARDJIAN, Bruno |
author_facet |
Fauchot, Juliette Saucier, Franqois J. Levasseur, Maurice Roy, Suzanne ZAKARDJIAN, Bruno |
author_sort |
Fauchot, Juliette |
title |
Wind-driven river plume dynamics and toxic Alexandrium tamarense blooms in the St. Lawrence estuary (Canada): A modeling study |
title_short |
Wind-driven river plume dynamics and toxic Alexandrium tamarense blooms in the St. Lawrence estuary (Canada): A modeling study |
title_full |
Wind-driven river plume dynamics and toxic Alexandrium tamarense blooms in the St. Lawrence estuary (Canada): A modeling study |
title_fullStr |
Wind-driven river plume dynamics and toxic Alexandrium tamarense blooms in the St. Lawrence estuary (Canada): A modeling study |
title_full_unstemmed |
Wind-driven river plume dynamics and toxic Alexandrium tamarense blooms in the St. Lawrence estuary (Canada): A modeling study |
title_sort |
wind-driven river plume dynamics and toxic alexandrium tamarense blooms in the st. lawrence estuary (canada): a modeling study |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-00833652 https://doi.org/10.1016/j.hal.2007.08.002 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
ISSN: 1568-9883 Harmful Algae https://hal.archives-ouvertes.fr/hal-00833652 Harmful Algae, Elsevier, 2008, 7, pp.214-227. ⟨10.1016/j.hal.2007.08.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.hal.2007.08.002 hal-00833652 https://hal.archives-ouvertes.fr/hal-00833652 doi:10.1016/j.hal.2007.08.002 |
op_doi |
https://doi.org/10.1016/j.hal.2007.08.002 |
container_title |
Harmful Algae |
container_volume |
7 |
container_issue |
2 |
container_start_page |
214 |
op_container_end_page |
227 |
_version_ |
1766195793963778048 |