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TRACING THERMOHALINE PROPERTIES AND PRODUCTIVITY OF SHELF-WATER MASSES USING THE STABLE ISOTOPIC COMPOSITION OF BENTHIC FORAMINIFERA

2014; Cushman Foundation for Foraminiferal Research; Volume: 44; Issue: 4 Linguagem: Inglês

10.2113/gsjfr.44.4.352

1943-264X

Patrícia P.B. Eichler, Katharina Billups, Helenice Vital, Joao-Paulo Moraes,

Aquaculture Nutrition and Growth

Research Article| October 01, 2014 TRACING THERMOHALINE PROPERTIES AND PRODUCTIVITY OF SHELF-WATER MASSES USING THE STABLE ISOTOPIC COMPOSITION OF BENTHIC FORAMINIFERA Patricia P. B. Eichler; Patricia P. B. Eichler 4 1Programa de Pós Graduação em Geofísica e Geodinâmica (PPGG), Laboratório de Geologia e Geofísica Marinha e Monitoramento Ambiental, Centro de Ciências Exatas e da Terra da Universidade Federal do Rio Grande do Norte (GGEMMA, CCET, UFRN, Brazil), Campus Universitário, Lagoa Nova, 59072-970-Natal, RN, Brazil 4Correspondence author. E-mail: patriciaeichler@gmail.com Search for other works by this author on: GSW Google Scholar Katharina Billups; Katharina Billups 2School of Marine Science and Policy, University of Delaware, 700 Pilottown Road, Lewes, DE 19958, USA Search for other works by this author on: GSW Google Scholar Helenice Vital; Helenice Vital 1Programa de Pós Graduação em Geofísica e Geodinâmica (PPGG), Laboratório de Geologia e Geofísica Marinha e Monitoramento Ambiental, Centro de Ciências Exatas e da Terra da Universidade Federal do Rio Grande do Norte (GGEMMA, CCET, UFRN, Brazil), Campus Universitário, Lagoa Nova, 59072-970-Natal, RN, Brazil Search for other works by this author on: GSW Google Scholar Joyce Alves De Moraes Joyce Alves De Moraes 3Programa de Pós Graduação em Administração (PPGA), Centro de Ciências Sociais e Aplicadas da Universidade Federal do Rio Grande do Norte (CCSA, UFRN, Brazil) Campus Universitário, Lagoa Nova, 59072-970-Natal, RN, Brazil Search for other works by this author on: GSW Google Scholar Journal of Foraminiferal Research (2014) 44 (4): 352–364. https://doi.org/10.2113/gsjfr.44.4.352 Article history received: 24 Jan 2013 accepted: 02 Jun 2014 first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Patricia P. B. Eichler, Katharina Billups, Helenice Vital, Joyce Alves De Moraes; TRACING THERMOHALINE PROPERTIES AND PRODUCTIVITY OF SHELF-WATER MASSES USING THE STABLE ISOTOPIC COMPOSITION OF BENTHIC FORAMINIFERA. Journal of Foraminiferal Research 2014;; 44 (4): 352–364. doi: https://doi.org/10.2113/gsjfr.44.4.352 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search Abstract We explored the applicability of stable isotopic ratios of nine foraminiferal species, four epifaunal (Pseudononion atlanticum, Cibicides fletcheri, Hoeglundina elegans, Hanzawaia boueana) and five infaunal (Angulogerina angulosa, Uvigerina peregrina, Buccella peruviana, Cassidulina subglobosa, Bulimina marginata), as environmental tracers on the southwest Atlantic continental shelf from samples collected along the Argentinean-Uruguayan-Brazilian Atlantic coast during austral winter 2003 and summer 2004. Linear regressions show that the stable isotopic composition of living foraminifera is associated with geographical and environmental variables (latitude, water depth, temperature, salinity, and dissolved silica). Multiple linear regressions show that the relevant variables in this study are latitude, salinity, and biogenic silica. There is a general trend of higher δ18O and lower δ13C values with increasing latitude, reflecting the influence of cooler water masses toward the south. Specifically, the δ18O data from U. peregrina, H. elegans, and P. atlanticum follow meridional temperature gradients with lower δ18O values in relatively warm Subtropical Shelf Water at the northernmost sites (27°S) and higher values in colder Sub-Antarctic Shelf Water at the southern sites (to 37°S). Angulogerina angulosa and P. atlanticum δ18O values correlate more strongly with salinity than temperature. Positive correlation of δ13C and water depth observed for some infaunal species indicates greater input of organic matter to the deeper-water benthos. In summer samples, however, this correlation between δ13C and water depth weakens, reflecting a less stratified water mass associated with upwelling. Results from this study support the application of these foraminifera to reconstructions of paleoenvironmental changes from sediment cores. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.