Seasonal production of organic-walled dinoflagellate cysts in an upwelling system: A sediment trap study from the Santa Barbara Basin, California

Manuel Bringué; Vera Pospelova; Dorothy Pak

doi:10.1016/j.marmicro.2013.03.007

Seasonal production of organic-walled dinoflagellate cysts in an upwelling system: A sediment trap study from the Santa Barbara Basin, California

Manuel Bringué, Vera Pospelova, Dorothy Pak

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57 Scopus citations

Abstract

Seasonal variations in dinoflagellate cyst fluxes and assemblage composition were investigated for the first time on the west coast of the United States of America. We analyzed the palynological content of an ~two year-long (May 1995 to March 1997) fortnightly sediment trap time series from the Santa Barbara Basin (SBB, off Southern California), a region characterized by seasonal upwelling and high levels of primary productivity. A total of 47 dinoflagellate cyst taxa were identified in the trap samples, with assemblages dominated by cysts produced by heterotrophic taxa. Multivariate analyses support that dinoflagellate cyst fluxes and assemblages are reliable indicators of primary productivity, and reflect sea surface temperature (SST) variations associated with upwelling in the SBB. In particular, Brigantedinium spp. are associated with active upwelling intervals (fluxes up to 127,430cystsm^-2day^-1 and up to 86.6% of the assemblage), when SST is lower, stratification is weaker and diatom production is maximal. Conversely, Lingulodinium machaerophorum indicates relaxed upwelling conditions (up to 9640cystsm^-2day^-1 and 29.9% of the assemblage) characterized by higher SST, stronger stratification and reduced primary productivity. Selenopemphix undulata is associated with colder SST in the region, whereas cyst type A abundances increase with higher SST. Thecae of potentially toxic dinoflagellates are also documented, such as Lingulodinium polyedrum and Prorocentrum micans, which are mainly recorded under conditions of higher SST and strong stratification, and Dinophysis spp. with higher fluxes between June and September of both 1995 and 1996.

Original language	English (US)
Pages (from-to)	34-51
Number of pages	18
Journal	Marine Micropaleontology
Volume	100
DOIs	https://doi.org/10.1016/j.marmicro.2013.03.007
State	Published - Apr 2013
Externally published	Yes

Bibliographical note

Funding Information:
M. Bringué was supported by the Fonds Québécois de la Recherche sur la Nature et les Technologies (FQRNT) B2 fellowship. The research was funded by a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery grant ( 224236 ) to Dr. V. Pospelova. The Santa Barbara Mooring Project was funded by the National Science Foundation grant OCE-952984 and the NOAA grant NA77RJ0453 to Drs. A. Alldredge and M. Brzezinski. We thank C. Gottschalk, S. Anderson and C. Wyatt-Evans for the technical support with the mooring. We are deeply grateful to Drs. A. Alldredge and U. Passow (University of California, Santa Barbara), and R. Shipe (University of California, Los Angeles) for sharing the environmental and geochemical data collected during the UCSB Santa Barbara Mooring Project. We also thank Dr. David Field (Monterey Bay Aquarium Research Institute) for providing a dated sediment sample from the SBB. Finally, the authors thank Dr. R. Jordan and two anonymous reviewers for their constructive and thoughtful comments.

Keywords

Harmful Algal Blooms
Lingulodinium machaerophorum
Northeastern Pacific
Primary productivity
Sea surface temperatures

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Seasonal production of organic-walled dinoflagellate cysts in an upwelling system: A sediment trap study from the Santa Barbara Basin, California",

abstract = "Seasonal variations in dinoflagellate cyst fluxes and assemblage composition were investigated for the first time on the west coast of the United States of America. We analyzed the palynological content of an ~two year-long (May 1995 to March 1997) fortnightly sediment trap time series from the Santa Barbara Basin (SBB, off Southern California), a region characterized by seasonal upwelling and high levels of primary productivity. A total of 47 dinoflagellate cyst taxa were identified in the trap samples, with assemblages dominated by cysts produced by heterotrophic taxa. Multivariate analyses support that dinoflagellate cyst fluxes and assemblages are reliable indicators of primary productivity, and reflect sea surface temperature (SST) variations associated with upwelling in the SBB. In particular, Brigantedinium spp. are associated with active upwelling intervals (fluxes up to 127,430cystsm-2day-1 and up to 86.6% of the assemblage), when SST is lower, stratification is weaker and diatom production is maximal. Conversely, Lingulodinium machaerophorum indicates relaxed upwelling conditions (up to 9640cystsm-2day-1 and 29.9% of the assemblage) characterized by higher SST, stronger stratification and reduced primary productivity. Selenopemphix undulata is associated with colder SST in the region, whereas cyst type A abundances increase with higher SST. Thecae of potentially toxic dinoflagellates are also documented, such as Lingulodinium polyedrum and Prorocentrum micans, which are mainly recorded under conditions of higher SST and strong stratification, and Dinophysis spp. with higher fluxes between June and September of both 1995 and 1996.",

keywords = "Harmful Algal Blooms, Lingulodinium machaerophorum, Northeastern Pacific, Primary productivity, Sea surface temperatures",

author = "Manuel Bringu{\'e} and Vera Pospelova and Dorothy Pak",

note = "Funding Information: M. Bringu{\'e} was supported by the Fonds Qu{\'e}b{\'e}cois de la Recherche sur la Nature et les Technologies (FQRNT) B2 fellowship. The research was funded by a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery grant ( 224236 ) to Dr. V. Pospelova. The Santa Barbara Mooring Project was funded by the National Science Foundation grant OCE-952984 and the NOAA grant NA77RJ0453 to Drs. A. Alldredge and M. Brzezinski. We thank C. Gottschalk, S. Anderson and C. Wyatt-Evans for the technical support with the mooring. We are deeply grateful to Drs. A. Alldredge and U. Passow (University of California, Santa Barbara), and R. Shipe (University of California, Los Angeles) for sharing the environmental and geochemical data collected during the UCSB Santa Barbara Mooring Project. We also thank Dr. David Field (Monterey Bay Aquarium Research Institute) for providing a dated sediment sample from the SBB. Finally, the authors thank Dr. R. Jordan and two anonymous reviewers for their constructive and thoughtful comments. ",

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doi = "10.1016/j.marmicro.2013.03.007",

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AU - Bringué, Manuel

AU - Pospelova, Vera

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N1 - Funding Information: M. Bringué was supported by the Fonds Québécois de la Recherche sur la Nature et les Technologies (FQRNT) B2 fellowship. The research was funded by a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery grant ( 224236 ) to Dr. V. Pospelova. The Santa Barbara Mooring Project was funded by the National Science Foundation grant OCE-952984 and the NOAA grant NA77RJ0453 to Drs. A. Alldredge and M. Brzezinski. We thank C. Gottschalk, S. Anderson and C. Wyatt-Evans for the technical support with the mooring. We are deeply grateful to Drs. A. Alldredge and U. Passow (University of California, Santa Barbara), and R. Shipe (University of California, Los Angeles) for sharing the environmental and geochemical data collected during the UCSB Santa Barbara Mooring Project. We also thank Dr. David Field (Monterey Bay Aquarium Research Institute) for providing a dated sediment sample from the SBB. Finally, the authors thank Dr. R. Jordan and two anonymous reviewers for their constructive and thoughtful comments.

PY - 2013/4

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N2 - Seasonal variations in dinoflagellate cyst fluxes and assemblage composition were investigated for the first time on the west coast of the United States of America. We analyzed the palynological content of an ~two year-long (May 1995 to March 1997) fortnightly sediment trap time series from the Santa Barbara Basin (SBB, off Southern California), a region characterized by seasonal upwelling and high levels of primary productivity. A total of 47 dinoflagellate cyst taxa were identified in the trap samples, with assemblages dominated by cysts produced by heterotrophic taxa. Multivariate analyses support that dinoflagellate cyst fluxes and assemblages are reliable indicators of primary productivity, and reflect sea surface temperature (SST) variations associated with upwelling in the SBB. In particular, Brigantedinium spp. are associated with active upwelling intervals (fluxes up to 127,430cystsm-2day-1 and up to 86.6% of the assemblage), when SST is lower, stratification is weaker and diatom production is maximal. Conversely, Lingulodinium machaerophorum indicates relaxed upwelling conditions (up to 9640cystsm-2day-1 and 29.9% of the assemblage) characterized by higher SST, stronger stratification and reduced primary productivity. Selenopemphix undulata is associated with colder SST in the region, whereas cyst type A abundances increase with higher SST. Thecae of potentially toxic dinoflagellates are also documented, such as Lingulodinium polyedrum and Prorocentrum micans, which are mainly recorded under conditions of higher SST and strong stratification, and Dinophysis spp. with higher fluxes between June and September of both 1995 and 1996.

AB - Seasonal variations in dinoflagellate cyst fluxes and assemblage composition were investigated for the first time on the west coast of the United States of America. We analyzed the palynological content of an ~two year-long (May 1995 to March 1997) fortnightly sediment trap time series from the Santa Barbara Basin (SBB, off Southern California), a region characterized by seasonal upwelling and high levels of primary productivity. A total of 47 dinoflagellate cyst taxa were identified in the trap samples, with assemblages dominated by cysts produced by heterotrophic taxa. Multivariate analyses support that dinoflagellate cyst fluxes and assemblages are reliable indicators of primary productivity, and reflect sea surface temperature (SST) variations associated with upwelling in the SBB. In particular, Brigantedinium spp. are associated with active upwelling intervals (fluxes up to 127,430cystsm-2day-1 and up to 86.6% of the assemblage), when SST is lower, stratification is weaker and diatom production is maximal. Conversely, Lingulodinium machaerophorum indicates relaxed upwelling conditions (up to 9640cystsm-2day-1 and 29.9% of the assemblage) characterized by higher SST, stronger stratification and reduced primary productivity. Selenopemphix undulata is associated with colder SST in the region, whereas cyst type A abundances increase with higher SST. Thecae of potentially toxic dinoflagellates are also documented, such as Lingulodinium polyedrum and Prorocentrum micans, which are mainly recorded under conditions of higher SST and strong stratification, and Dinophysis spp. with higher fluxes between June and September of both 1995 and 1996.

KW - Harmful Algal Blooms

KW - Lingulodinium machaerophorum

KW - Northeastern Pacific

KW - Primary productivity

KW - Sea surface temperatures

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ER -

Seasonal production of organic-walled dinoflagellate cysts in an upwelling system: A sediment trap study from the Santa Barbara Basin, California

Abstract

Bibliographical note

Keywords

UN SDGs

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