{"refrec":{"BRefID":238123,"RR":"<b>Moreau, S.; di Fiori, E.; Schloss, I.R.; Almandoz, G.O.; Esteves, J.L.; Paparazzo, F.E.; Ferreyra, G.A.</b> (2013). The role of phytoplankton composition and microbial community metabolism in sea-air Delta pCO<sub>2</sub> variation in the Weddell Sea. <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 82</i>: 44-59. <a href=\"http://dx.doi.org/10.1016/j.dsr.2013.07.010\" target=\"_blank\">dx.doi.org/10.1016/j.dsr.2013.07.010</a>","BEntID":229810,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 82</i>: 44-59. <a href=\"https://dx.doi.org/10.1016/j.dsr.2013.07.010\" target=\"_blank\">https://dx.doi.org/10.1016/j.dsr.2013.07.010</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Moreau, S.; di Fiori, E.; Schloss, I.R.; Almandoz, G.O.; Esteves, J.L.; Paparazzo, F.E.; Ferreyra, G.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Moreau, S. <i>et al.</i>","Englishabstract":"The Weddell Sea is known to be a CO<sub>2</sub> 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 <i>in situ</i> incubations and from nutrient's difference between surface and subsurface waters, with ?pCO<sub>2</sub> in the Weddell Sea, during four austral summers (2002–2005). The ?pCO<sub>2</sub> was significantly negative throughout the Weddell Sea in 2002 (-17.2±28.1 µatm), 2003 (-64.1±31.3 µatm), 2004 (-54.9±61.8 µatm) and 2005 (-63.8±60 µatm), indicating that the Weddell Sea acted as an atmospheric CO<sub>2</sub> sink during those summers. The ?pCO<sub>2</sub> was significantly lower in the south than in the center or north of the Weddell Sea. This was consistent with the significantly higher Chlorophyll-<i>a</i> concentrations (Chl-<i>a</i>) observed in the south (2.3±1.9 µg l<sup>-1</sup>) than in the center (1.3±1.2 µg l<sup>-1</sup>) or north (1.4±1.7 µg l<sup>-1</sup>). In contrast, waters were mainly undersaturated in O<sub>2</sub>, due to the upwelling of oxygen poor Warm Deep Water (WDW). The negative relationship between the ?pCO<sub>2</sub> and the %O<sub>2</sub> 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 <i>in situ</i> CO<sub>2</sub> and O<sub>2</sub> dynamics. The dynamics of CO<sub>2</sub> and O<sub>2</sub> were solely related to the net community production (NCP) and to the gross primary production (GPP) when only stations with Chl-<i>a</i> > 1 µg l<sup>-1</sup> were considered. A significant relationship was, however, found between ?pCO<sub>2</sub> 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 CO<sub>2</sub> and O<sub>2</sub> were related to the biomass of diatoms and, contrarily to other seas, to the biomass of phytoflagellates.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The role of phytoplankton composition and microbial community metabolism in sea-air Delta pCO<sub>2</sub> variation in the Weddell Sea","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Weddell Sea; CO2 dynamics; Phytoplankton composition; Communitymetabolism","OtherDescriptors":null,"Notes":null,"AnaPub":2013,"MonPub":null,"DateUpdate":"2015-10-30","DateCreate":"2014-05-18","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000327169100005","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.dsr.2013.07.010"},"refs":null,"anarec":{"AnaID":238123,"PubliDate":2013,"Pagination":"44-59","XtraPublOfAnaID":null,"ISBN":null,"Volume":"82","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45506,"SerRR":"Deep-Sea Research, Part I. 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