Artículo

Moreau, S.; di Fiori, E.; Schloss, I.R.; Almandoz, G.O.; Esteves, J.L.; Paparazzo, F.E.; Ferreyra, G.A. "The role of phytoplankton composition and microbial community metabolism in sea-air δpCO2 variation in the Weddell Sea" (2013) Deep-Sea Research Part I: Oceanographic Research Papers. 82:44-59
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Abstract:

The Weddell Sea is known to be a CO2 sink due to active biological and physical pumps. Here we study the relationships of phytoplankton biomass and composition and microbial community metabolism, estimated from simulated in situ incubations and from nutrient's difference between surface and subsurface waters, with δpCO2 in the Weddell Sea, during four austral summers (2002-2005). The δpCO2 was significantly negative throughout the Weddell Sea in 2002 (-17.2±28.1μatm), 2003 (-64.1±31.3μatm), 2004 (-54.9±61.8μatm) and 2005 (-63.8±60μatm), indicating that the Weddell Sea acted as an atmospheric CO2 sink during those summers. The δpCO2 was significantly lower in the south than in the center or north of the Weddell Sea. This was consistent with the significantly higher Chlorophyll-a concentrations (Chl-a) observed in the south (2.3±1.9μgl-1) than in the center (1.3±1.2μgl-1) or north (1.4±1.7μgl-1). In contrast, waters were mainly undersaturated in O2, due to the upwelling of oxygen poor Warm Deep Water (WDW). The negative relationship between the δpCO2 and the %O2 saturation suggested that planktonic metabolic activities played a role in these gases dynamics, along with the upwelling of WDW. However, these relationships could not be observed from the results of the incubation experiments, probably because of different temporal scales between gas exchanges in incubation experiments and in situ CO2 and O2 dynamics. The dynamics of CO2 and O2 were solely related to the net community production (NCP) and to the gross primary production (GPP) when only stations with Chl-a>1μgl-1 were considered. A significant relationship was, however, found between δpCO2 and the primary production until the time of sampling for all stations when estimated from nutrients depletion between surface and subsurface waters. Finally, the distribution of CO2 and O2 were related to the biomass of diatoms and, contrarily to other seas, to the biomass of phytoflagellates. © 2013 Elsevier Ltd.

Registro:

Documento: Artículo
Título:The role of phytoplankton composition and microbial community metabolism in sea-air δpCO2 variation in the Weddell Sea
Autor:Moreau, S.; di Fiori, E.; Schloss, I.R.; Almandoz, G.O.; Esteves, J.L.; Paparazzo, F.E.; Ferreyra, G.A.
Filiación:Georges Lemaître Centre for Earth and Climate Research, Earth and Life Institute, Université catholique de Louvain, SC10-L4.03.08 Mercator, place Louis Pasteur 3, 1348 Louvain-La-Neuve, Belgium
Institut des Sciences de la Mer (ISMER), Université du Québec à Rimouski (UQAR), 310 allée des Ursulines, Rimouski, QC G5L 3A1, Canada
Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Rivadavia 1917 (C1033AAV), Buenos Aires, Argentina
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Int. Güiraldes 2160 (C1428 EHA), Buenos Aires, Argentina
Instituto Antártico Argentino, Cerrito 1248 (C1010AAZ), Buenos Aires, Argentina
División Ficología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Paseo del Bosque s/n, B1900FWA, La Plata, Argentina
Centro Nacional Patagónico (CENPAT-CONICET), Bvd. Brown 3000 (9120) Puerto Madryn, Chubut, Argentina
Palabras clave:CO2 dynamics; Community metabolism; Phytoplankton composition; Weddell Sea; Chlorophyll-a concentration; Gross primary production; Microbial communities; Net community productions; Phytoplankton biomass; Phytoplankton composition; Primary production; Weddell Sea; Biomass; Dynamics; Experiments; Metabolism; Microorganisms; Nutrients; Physiology; Phytoplankton; Carbon dioxide; air-sea interaction; biological pump; biomass; carbon dioxide; chlorophyll a; diatom; flagellate; metabolism; microbial community; net primary production; nutrient limitation; phytoplankton; upwelling; warm water; Southern Ocean; Weddell Sea; Bacillariophyta; Phytomastigophorea
Año:2013
Volumen:82
Página de inicio:44
Página de fin:59
DOI: http://dx.doi.org/10.1016/j.dsr.2013.07.010
Título revista:Deep-Sea Research Part I: Oceanographic Research Papers
Título revista abreviado:Deep-Sea Res. Part I Oceanogr. Res. Pap.
ISSN:09670637
CODEN:DRORE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09670637_v82_n_p44_Moreau

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Citas:

---------- APA ----------
Moreau, S., di Fiori, E., Schloss, I.R., Almandoz, G.O., Esteves, J.L., Paparazzo, F.E. & Ferreyra, G.A. (2013) . The role of phytoplankton composition and microbial community metabolism in sea-air δpCO2 variation in the Weddell Sea. Deep-Sea Research Part I: Oceanographic Research Papers, 82, 44-59.
http://dx.doi.org/10.1016/j.dsr.2013.07.010
---------- CHICAGO ----------
Moreau, S., di Fiori, E., Schloss, I.R., Almandoz, G.O., Esteves, J.L., Paparazzo, F.E., et al. "The role of phytoplankton composition and microbial community metabolism in sea-air δpCO2 variation in the Weddell Sea" . Deep-Sea Research Part I: Oceanographic Research Papers 82 (2013) : 44-59.
http://dx.doi.org/10.1016/j.dsr.2013.07.010
---------- MLA ----------
Moreau, S., di Fiori, E., Schloss, I.R., Almandoz, G.O., Esteves, J.L., Paparazzo, F.E., et al. "The role of phytoplankton composition and microbial community metabolism in sea-air δpCO2 variation in the Weddell Sea" . Deep-Sea Research Part I: Oceanographic Research Papers, vol. 82, 2013, pp. 44-59.
http://dx.doi.org/10.1016/j.dsr.2013.07.010
---------- VANCOUVER ----------
Moreau, S., di Fiori, E., Schloss, I.R., Almandoz, G.O., Esteves, J.L., Paparazzo, F.E., et al. The role of phytoplankton composition and microbial community metabolism in sea-air δpCO2 variation in the Weddell Sea. Deep-Sea Res. Part I Oceanogr. Res. Pap. 2013;82:44-59.
http://dx.doi.org/10.1016/j.dsr.2013.07.010