Role of plankton communities in sea-air variations in pCO2 in the SW Atlantic Ocean

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The influence of the plankton community structure on carbon dynamics was studied in the surface waters of the Argentinean continental shelf (SW Atlantic Ocean) in summer and fall 2002, 2003 and 2004, The horizontal changes in plankton community respiration (R), net community production (NCP) and gro...

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Autores principales: Schloss, Irene R., Ferreyra, Gustavo A., Ferrario, Martha Elba, Almandoz, Gastón Osvaldo, Codina, Raúl, Bianchi, Alejandro A., Balestrini, Carlos F., Ochoa, Héctor A., Pino, D. Ruiz, Poisson, Alain
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Ciencias Naturales
Continental shelf
Gross primary production
Net primary production
Oxygen saturation
pCO2
Phytoplankton composition
Respiration
SW atlantic
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83004
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83004
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Continental shelf
Gross primary production
Net primary production
Oxygen saturation
pCO2
Phytoplankton composition
Respiration
SW atlantic
spellingShingle Ciencias Naturales
Continental shelf
Gross primary production
Net primary production
Oxygen saturation
pCO2
Phytoplankton composition
Respiration
SW atlantic
Schloss, Irene R.
Ferreyra, Gustavo A.
Ferrario, Martha Elba
Almandoz, Gastón Osvaldo
Codina, Raúl
Bianchi, Alejandro A.
Balestrini, Carlos F.
Ochoa, Héctor A.
Pino, D. Ruiz
Poisson, Alain
Role of plankton communities in sea-air variations in pCO2 in the SW Atlantic Ocean
topic_facet Ciencias Naturales
Continental shelf
Gross primary production
Net primary production
Oxygen saturation
pCO2
Phytoplankton composition
Respiration
SW atlantic
description The influence of the plankton community structure on carbon dynamics was studied in the surface waters of the Argentinean continental shelf (SW Atlantic Ocean) in summer and fall 2002, 2003 and 2004, The horizontal changes in plankton community respiration (R), net community production (NCP) and gross primary production (GPP) were (1) compared with the difference in the partial pressure of CO2 (pCO2) between the sea surface and the atmosphere (ΔpCO2), (2) compared with oxygen saturation and (3) related to the microscopic phytoplankton assemblages, This area, which has recently been shown to be a CO2 sink, had an average surface oxygen saturation of 108.1%, indicating that net photosynthesis could have played a dominant role in the CO2 dynamics. At most stations, the production:respiration (GPP:R) ratio was greater than 1, indicating that planktonic communities were autotrophic; the average GPP:R ratio for the whole study was 2.99, Phytoplankton biomass (chlorophyll a) and NCP showed an inverse relationship with ΔpCO2 and a direct relationship with %O 2 saturation when phytoplankton assemblages were dominated by diatoms (30% of the stations), This was not the case when small (≤5 μm) flagellates were the most abundant organisms, Although NCP was mostly positive for both groups of stations (i.e. diatom-dominated or small flagellate- dominated), other physical and biological processes are thought to modify the CO2 dynamics when small flagellates are the prevailing phytoplankton group.
format Articulo
Articulo
author Schloss, Irene R.
Ferreyra, Gustavo A.
Ferrario, Martha Elba
Almandoz, Gastón Osvaldo
Codina, Raúl
Bianchi, Alejandro A.
Balestrini, Carlos F.
Ochoa, Héctor A.
Pino, D. Ruiz
Poisson, Alain
author_facet Schloss, Irene R.
Ferreyra, Gustavo A.
Ferrario, Martha Elba
Almandoz, Gastón Osvaldo
Codina, Raúl
Bianchi, Alejandro A.
Balestrini, Carlos F.
Ochoa, Héctor A.
Pino, D. Ruiz
Poisson, Alain
author_sort Schloss, Irene R.
title Role of plankton communities in sea-air variations in pCO2 in the SW Atlantic Ocean
title_short Role of plankton communities in sea-air variations in pCO2 in the SW Atlantic Ocean
title_full Role of plankton communities in sea-air variations in pCO2 in the SW Atlantic Ocean
title_fullStr Role of plankton communities in sea-air variations in pCO2 in the SW Atlantic Ocean
title_full_unstemmed Role of plankton communities in sea-air variations in pCO2 in the SW Atlantic Ocean
title_sort role of plankton communities in sea-air variations in pco2 in the sw atlantic ocean
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/83004
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