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Picophytoplankton and carbon cycle on the northeastern shelf of the Gulf of Cádiz (SW Iberian Peninsula)

Picophytoplankton and carbon cycle on the northeastern shelf of the Gulf of Cádiz (SW Iberian Peninsula)
Picophytoplankton and carbon cycle on the northeastern shelf of the Gulf of Cádiz (SW Iberian Peninsula)
Four surveys (Jun’06 and Nov’06; Feb’07 and May’07) were carried out on the northeastern shelf of the Gulf of Cádiz (southwest Iberian Peninsula) to relate the spatio-temporal distribution of the carbon cycle parameters (dissolved inorganic carbon and dissolved organic carbon) to picophytoplankton biomass and community composition. In addition, the net ecosystem production and the picophytoplankton contribution to the air-sea CO2 exchange process were investigated. The results showed that chlorophyll-a, carbon cycle parameters and picophytoplankton composition showed large seasonality, and the Guadalquivir Estuary plays an important role in the contribution of nutrient and suspended particular material over the year. Regarding picophytoplankton composition, the flow cytometry analysis demonstrated that Prochlorococcus and Synechococcus were the main populations in the studied area and their temporal and spatial distributions were complementary: the Prochlorococcus population showed its maximum concentration in May’07 and Jun’06 and in the surface oceanic water, whereas the Synechococcus population was at its maximum during Feb’07 and Nov’06, and off the Guadalquivir Estuary and Bay of Cádiz. In addition, a relationship between the studied parameters and the fugacity of CO2 was also observed, suggesting that primary production is an important factor in the regulation of this parameter in the studied area. The calculated carbon budget showed that the area acts as a carbon sink on an annual basis.
carbon cycle, chlorophyll-a, picophytoplankton, seasonal variations, coastal zone, Guadalquivir Estuary, Gulf of Cádiz
0214-8358
49-62
Ribas-Ribas, Mariana
85a1f816-cfbd-4a9d-83ff-28611827edcd
Sobrino, Cristina
e662d8dc-4b3c-42a3-980c-83ca8bd1d219
Debelius, Bibiana
b82544e8-aa96-4b7d-8209-e7ddaf3ed3cd
Lubián, Luís M.
8c8d9df3-7fe1-4e70-b098-1cf541f8868c
Ponce, Rocio
6be14fb7-5bb1-4c61-a94b-a92a12d90e08
Gómez-Parra, Abelardo
2785c838-2dad-41c4-b67d-1a4f1ef58c51
Forja, Jesús M.
a2898b41-1e84-47eb-8b4c-9f903921c156
Ribas-Ribas, Mariana
85a1f816-cfbd-4a9d-83ff-28611827edcd
Sobrino, Cristina
e662d8dc-4b3c-42a3-980c-83ca8bd1d219
Debelius, Bibiana
b82544e8-aa96-4b7d-8209-e7ddaf3ed3cd
Lubián, Luís M.
8c8d9df3-7fe1-4e70-b098-1cf541f8868c
Ponce, Rocio
6be14fb7-5bb1-4c61-a94b-a92a12d90e08
Gómez-Parra, Abelardo
2785c838-2dad-41c4-b67d-1a4f1ef58c51
Forja, Jesús M.
a2898b41-1e84-47eb-8b4c-9f903921c156

Ribas-Ribas, Mariana, Sobrino, Cristina, Debelius, Bibiana, Lubián, Luís M., Ponce, Rocio, Gómez-Parra, Abelardo and Forja, Jesús M. (2013) Picophytoplankton and carbon cycle on the northeastern shelf of the Gulf of Cádiz (SW Iberian Peninsula). Scientia Marina, 77 (S1), 49-62. (doi:10.3989/scimar.03732.27D).

Record type: Article

Abstract

Four surveys (Jun’06 and Nov’06; Feb’07 and May’07) were carried out on the northeastern shelf of the Gulf of Cádiz (southwest Iberian Peninsula) to relate the spatio-temporal distribution of the carbon cycle parameters (dissolved inorganic carbon and dissolved organic carbon) to picophytoplankton biomass and community composition. In addition, the net ecosystem production and the picophytoplankton contribution to the air-sea CO2 exchange process were investigated. The results showed that chlorophyll-a, carbon cycle parameters and picophytoplankton composition showed large seasonality, and the Guadalquivir Estuary plays an important role in the contribution of nutrient and suspended particular material over the year. Regarding picophytoplankton composition, the flow cytometry analysis demonstrated that Prochlorococcus and Synechococcus were the main populations in the studied area and their temporal and spatial distributions were complementary: the Prochlorococcus population showed its maximum concentration in May’07 and Jun’06 and in the surface oceanic water, whereas the Synechococcus population was at its maximum during Feb’07 and Nov’06, and off the Guadalquivir Estuary and Bay of Cádiz. In addition, a relationship between the studied parameters and the fugacity of CO2 was also observed, suggesting that primary production is an important factor in the regulation of this parameter in the studied area. The calculated carbon budget showed that the area acts as a carbon sink on an annual basis.

Full text not available from this repository.

More information

Published date: January 2013
Keywords: carbon cycle, chlorophyll-a, picophytoplankton, seasonal variations, coastal zone, Guadalquivir Estuary, Gulf of Cádiz
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 349063
URI: http://eprints.soton.ac.uk/id/eprint/349063
ISSN: 0214-8358
PURE UUID: 935ddbf3-b593-436b-bb10-a84e640b6522

Catalogue record

Date deposited: 21 Feb 2013 13:16
Last modified: 16 Jul 2019 21:42

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