{"refrec":{"BRefID":337873,"RR":"<b>Troina, G.C.; Dehairs, F.; Botta, S.; Di Tullio, J.C.; Elskens, M.; Secchi, E.R.</b> (2020). Zooplankton-based δ<sup>13</sup>C and δ<sup>15</sup>N isoscapes from the outer continental shelf and slope in the subtropical western South Atlantic. <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 159</i>: 103235. <a href=\"https://hdl.handle.net/10.1016/j.dsr.2020.103235\" target=\"_blank\">https://hdl.handle.net/10.1016/j.dsr.2020.103235</a>","BEntID":334497,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 159</i>: 103235. <a href=\"https://hdl.handle.net/10.1016/j.dsr.2020.103235\" target=\"_blank\">https://hdl.handle.net/10.1016/j.dsr.2020.103235</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Troina, G.C.; Dehairs, F.; Botta, S.; Di Tullio, J.C.; Elskens, M.; Secchi, E.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Troina, G.C. <i>et al.</i>","Englishabstract":"Characterizing the patterns of stable carbon (δ<sup>13</sup>C) and nitrogen (δ<sup>15</sup>N) isotopes at the base of the food webs (baseline) is essential in ecological studies for assessing the feeding habits and migration patterns of marine predators. We analysed δ<sup>13</sup>C and δ<sup>15</sup>N in zooplankton samples collected in spring and autumn (2012–2015), along the south (SCM) and southeast (NCSM) Brazilian oceanic waters. An increase in δ<sup>13</sup>C from the shelf break towards the offshore was associated with the influence of continental water input and upwellings along the shelf break, which introduce <sup>13</sup>C-depleted inorganic carbon to the surface, where it will be incorporated into the biological system through phytoplankton growth. An opposite trend was observed in δ<sup>15</sup>N, with higher values along the shelf break related to the intrusion of upwelled deep-water nutrients, contrasting with the oligotrophic offshore waters where N<sub>2</sub> fixation takes place, resulting in primary and secondary production that is relatively more depleted in <sup>15</sup>N. A latitudinal (north-south) decrease in δ<sup>13</sup>C along the offshore area coincided with known isotopic patterns in inorganic carbon, which were more <sup>13</sup>C-depleted towards higher latitudes. On the other hand, an increase in δ<sup>15</sup>N was observed towards the south, reflecting the contrast between the N<sub>2</sub> fixation in the more oligotrophic waters in the NCSM and the higher nutrient availability in the SCM. Additionally, δ<sup>13</sup>C was significantly higher in autumn and δ<sup>15</sup>N was higher in spring. Although inter-annual differences in δ<sup>15</sup>N were non-significant, δ<sup>13</sup>C was significantly lower in 2012 than in the later years. This study provides novel information regarding the patterns of baseline δ<sup>13</sup>C and δ<sup>15</sup>N in the southwestern Atlantic Ocean, which will be useful for future investigation of the ecology of higher trophic-level organisms occurring in this area.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Zooplankton-based δ<sup>13</sup>C and δ<sup>15</sup>N isoscapes from the outer continental shelf and slope in the subtropical western South Atlantic","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-21 01:33:00.676444","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Brazil; Stable isotopes; Marine biogeochemistry; Trophic ecology; Shelf break; Slope","OtherDescriptors":null,"Notes":null,"AnaPub":2020,"MonPub":null,"DateUpdate":"2021-05-31","DateCreate":"2021-05-17","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000529921100008","VABBcode":null,"OpenAcc":0,"Handle":"10.1016/j.dsr.2020.103235"},"refs":null,"anarec":{"AnaID":337873,"PubliDate":2020,"Pagination":"103235","XtraPublOfAnaID":null,"ISBN":null,"Volume":"159","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45506,"SerRR":"Deep-Sea Research, Part I. 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