# Stable Isotope Data of Benthic Foraminifera from the Brazilian Shelf #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. # If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # Description/Documentation lines begin with '#' followed by a space # Data lines have no '#' # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/36514 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-ocean-36514.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Paleoceanography # # Dataset_DOI: 10.25921/cyaz-sh69 # # Science_Keywords: #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/billups2022/billups2022-acureef.txt # Data_Download_Description: NOAA Template File; Benthic Foraminifera Stable Isotope Data # #--------------------------------------- # Contribution_Date # Date: 2022-06-09 #--------------------------------------- # File_Last_Modified_Date # Date: 2025-05-27 #--------------------------------------- # Title # Study_Name: Stable Isotope Data of Benthic Foraminifera from the Brazilian Shelf #--------------------------------------- # Investigators # Investigators: Billups, Katharina; Eichler, Patricia; Ravelo, Christina; do Nascimento, Luzia; Helenice, Vital; Gomes, Moab #--------------------------------------- # Description_Notes_and_Keywords # Description: #--------------------------------------- # Publication # Authors: Katharina Billups, Patricia Pinheiro Beck Eichler, Christina Ravelo, Luzia Liniane do Nascimento, Helenice Vital, Moab Praxedes Gomes # Published_Date_or_Year: 2022-10-31 # Published_Title: Stable isotopic variability in individual benthic foraminifera from the continental shelf of tropical Brazil # Journal_Name: Journal of Foraminiferal Research # Volume: 52 # Edition: # Issue: 4 # Pages: 212-228 # Report_Number: # DOI: 10.2113/gsjfr.52.4.212 # Online_Resource: # Full_Citation: # Abstract: We analyzed nine benthic foraminiferal species from the Açu Reef belonging to the orders Rotaliida and Miliolida, symbiont-bearing (Rotaliida: Amphistegina gibbosa, Heterostegina depressa; Miliolida: Peneroplis carinatus, Archaias angulatus, Amphisorus hemprichii, and Archaias compressus) and symbiont-barren (Rotaliida: Buccella peruviana, Pseudononion atlanticum; Miliolida: Quinqueloculina lamarckiana). Stable isotopes measured on individual tests display a large intraspecific variability (d18O: ~1-1.5‰; d13C: ~2-3.5‰) that is not associated with site location, sampling season, or water depth. Positive correlation between d13C and d18O values is significant in three of the species (A. gibbosa, B. peruviana, and Q. lamarckiana), with a regression slope similar to other marine calcifiers (~2‰ d13C/‰ d18O), perhaps related to the carbonate chemistry of the calcifying fluid. With the exception of A. gibbosa, offsets from d18O equilibrium, when distinct, tend to be positive. Offsets from d13C of SCO2 of sea water are negative for two of the rotaliids (A. gibbosa and H. depressa) and positive for three of the miliolids (P. carinatus, A. angulatus, A. hemprichii) with non-symbiont-bearing species of both orders being close to the sea water values (~ 2-1.3‰). These d13C differences are consistent with calcification pathways of rotaliids versus miliolids with the former drawing carbon from an internal pool and the latter from ambient seawater. Our study contributes a large data set that illustrates the importance of vital and abiotic effects on the stable isotopic composition of large benthic foraminifera in a tropical continental shelf, limiting their applicability as paleoenvironmental tracers. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Coordination for Improvement of Higher Level Personnel (CAPES) # Grant: 43/2013, 23038.004320 / 2014 -11, 88887.305531/2018-00, 88881.188496/2018-01 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: The Brazilian National Council for Scientific and Technological Development (CNPq) # Grant: 315742/2020-8, 302483/2019-5, 465634/2014-1 #--------------------------------------- # Site_Information # Site_Name: Acu Reef # Location: Atlantic Ocean # Northernmost_Latitude: -4.58 # Southernmost_Latitude: -4.83 # Easternmost_Longitude: -36.52 # Westernmost_Longitude: -36.99 # Elevation_m: #--------------------------------------- # Data_Collection # Collection_Name: AcuReef_Billups2022 # First_Year: # Last_Year: # Time_Unit: # Core_Length_m: # Parameter_Keywords: carbon isotopes, oxygen isotopes, geochemistry # Notes: samples are from a grab sample (1 cm depth) #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # Variables # PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data) # ## Station sample identification,,,meter,,Paleoceanography,,,C, ## water_depth depth,,,meter,,Paleoceanography,,,N, ## Longitude longitude,,,degree east,,Paleoceanography,,,N, ## Latitude latitude,,,degree north,,Paleoceanography,,,N, ## delta-13C-ang delta 13C,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Archaias angulatus ## delta-18O-ang delta 18O,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Archaias angulatus ## comment-ang notes,,,dimensionless,,Paleoceanography,,,C,denotes values from the species Archais compressus; RB stands for Rose Bengal ## delta-13C-hemp delta 13C,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Amphisorus hemprichii ## delta-18O-hemp delta 18O,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Amphisorus hemprichii ## delta-13C-car delta 13C,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Peneroplis carinatus ## delta-18O-car delta 18O,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Peneroplis carinatus ## comment-car notes,,,dimensionless,,Paleoceanography,,,C,RB stands for Rose Bengal ## delta-13C-lam delta 13C,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Quinqueloculina lamarckiana ## delta-18O-lam delta 18O,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Quinqueloculina lamarckiana ## comment-lam notes,,,dimensionless,,Paleoceanography,,,C,RB stands for Rose Bengal ## delta-13C-gib delta 13C,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Amphistegina gibbosa ## delta-18O-gib delta 18O,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Amphistegina gibbosa ## comment-gib notes,,,dimensionless,,Paleoceanography,,,C,RB stands for Rose Bengal ## delta-13C-per delta 13C,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Buccella peruviana ## delta-18O-per delta 18O,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Buccella peruviana ## comment-per notes,,,dimensionless,,Paleoceanography,,,C,RB stands for Rose Bengal ## delta-13C-dep delta 13C,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Heterostegina depressa ## delta-18O-dep delta 18O,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Heterostegina depressa ## delta-13C-atl delta 13C,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Pseudononion atlanticum ## delta-18O-atl delta 18O,benthic foraminifer,,per mil,,Paleoceanography,,isotope ratio mass spectrometry,N,Pseudononion atlanticum #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: Station water_depth Longitude Latitude delta-13C-ang delta-18O-ang comment-ang delta-13C-hemp delta-18O-hemp delta-13C-car delta-18O-car comment-car delta-13C-lam delta-18O-lam comment-lam delta-13C-gib delta-18O-gib comment-gib delta-13C-per delta-18O-per comment-per delta-13C-dep delta-18O-dep delta-13C-atl delta-18O-atl AR-01 31 -36.62 -4.73 3.31 -0.96 Archais compressus 3.91 -0.50 2.14 -1.24 -0.56 -2.07 RB-stained 2.39 -1.09 AR-02 30 -36.62 -4.74 2.93 -0.71 AR2 30 -36.62 -4.74 2.95 -0.93 AR-03 29 -36.63 -4.76 3.55 -0.77 iron-stained 1.26 -1.96 2.08 -1.42 AR-03 29 -36.63 -4.76 3.49 -1.07 AR-04 29 -36.64 -4.78 0.13 -1.67 AR-05 21 -36.64 -4.80 3.49 -0.87 Archais compressus 1.07 -1.17 AR-05 21 -36.64 -4.80 2.71 -1.71 Archais compressus AR-06 32 -36.68 -4.73 AR-09 32 -36.62 -4.82 1.62 -1.01 AR-10 34 -36.61 -4.80 AR-11 34 -36.61 -4.79 AR-12 36 -36.61 -4.78 1.41 -1.35 AR-13 39 -36.61 -4.77 3.42 -0.61 iron-stained 1.95 -0.74 1.09 -0.98 AR13 39 -36.61 -4.77 2.13 -1.22 AR-14 44 -36.61 -4.76 1.51 -1.11 AR-15 44 -36.60 -4.75 1.54 -1.16 AR-16 41 -36.60 -4.73 AR-17 32 -36.60 -4.72 2.96 -1.62 3.90 -1.01 0.68 -1.72 0.60 -1.55 AR-17 32 -36.60 -4.72 1.42 -1.33 RB-stained AR-17 32 -36.60 -4.72 1.91 -0.88 AR-17 32 -36.60 -4.72 2.55 -0.84 AR-17 32 -36.60 -4.72 2.62 -0.87 AR-18 33 -36.60 -4.72 0.39 -1.82 AR-19 57 -36.60 -4.71 2.54 -1.09 AR-20 21 -36.54 -4.82 3.34 -1.25 AR-20 21 -36.54 -4.82 3.14 -1.40 AR-21 20 -36.53 -4.81 3.01 -0.85 0.06 -2.06 AR-21 20 -36.53 -4.81 0.38 -1.40 AR-21 20 -36.53 -4.81 0.70 -1.84 AR-21 20 -36.53 -4.81 AR-23 21 -36.52 -4.78 3.53 -1.34 AR-24 37 -36.52 -4.76 3.61 -1.30 2.92 -0.91 1.32 -1.83 0.61 -1.81 AR-24 37 -36.52 -4.76 3.13 -1.01 -0.61 -1.68 AR-25 40 -36.52 -4.75 AR-28 48 -36.58 -4.71 AR-30 44 -36.58 -4.73 2.82 -0.86 0.57 -2.14 2.63 -1.06 RB-stained AR-30 44 -36.58 -4.73 3.28 -1.23 AR-31 37 -36.58 -4.74 AR-34 28 -36.58 -4.77 AR-35 31 -36.58 -4.78 AR-36 27 -36.58 -4.79 1.22 -1.16 AR37 0.35 -1.17 AR-38 28 -36.59 -4.83 4.02 -1.08 1.33 -1.27 AR-39 39 -36.65 -4.70 2.29 -1.02 3.07 -0.81 2.47 -1.16 AR-40 47 -36.63 -4.69 0.95 -1.46 AR-41 37 -36.65 -4.71 1.98 -1.20 1.47 -1.68 AR42 35 -36.65 -4.71 0.76 -2.19 AR42 35 -36.65 -4.71 0.77 -1.62 AR-43 34 -36.66 -4.73 0.88 -1.47 1.13 -1.52 2.45 -1.07 AR-43 34 -36.66 -4.73 1.78 -0.75 iron-stained AR-44 33 -36.66 -4.74 AR-45 22 -36.67 -4.76 3.78 0.15 2.26 -0.78 iron-stained 1.56 -0.97 -0.59 -1.89 AR-46 19 -36.67 -4.77 3.49 -0.64 0.34 -1.49 AR-47 23 -36.68 -4.79 3.16 -0.77 2.56 -0.96 iron-stained AR49 0.88 -0.87 1.05 -1.69 RB-stained AR49 1.46 -0.57 iron-stained AR-50 25 -36.70 -4.75 1.58 -0.91 AR-51 21 -36.82 -4.72 3.46 -0.13 2.78 -0.68 iron-stained 0.37 -1.49 AR-52 24 -36.78 -4.70 3.57 -1.38 3.39 -1.22 3.51 -0.80 0.67 -2.22 0.40 -1.53 AR-53 22 -36.81 -4.70 3.45 -0.74 1.52 -0.78 AR-53 22 -36.81 -4.70 2.11 -0.67 iron-stained AR-54 3.31 -0.49 3.21 -0.41 1.26 -0.65 2.05 -1.24 AR-55 30 -36.80 -4.67 3.16 -0.81 2.59 -0.65 AR-56 36 -36.79 -4.66 3.13 -1.04 3.30 -0.63 2.64 -1.20 0.65 -1.92 -0.42 -1.89 AR56 36 -36.79 -4.66 2.84 -0.93 AR-57 37 -36.79 -4.65 3.17 -1.00 0.51 -1.97 AR-58 42 -36.79 -4.65 0.53 -2.08 2.36 -1.96 AR-59 48 -36.79 -4.64 3.50 -1.01 1.83 -0.94 0.68 -1.99 AR-59 48 -36.79 -4.64 3.57 -0.55 RB-stained 3.20 -0.61 RB-stained AR-60 57 -36.78 -4.63 3.24 -0.79 AR-61 51 -36.67 -4.68 3.40 -0.96 1.09 -1.84 AR-61 51 -36.67 -4.68 2.08 -1.40 AR-62 20 -36.79 -4.73 3.24 -0.91 0.72 -1.91 AR-63 44 -36.77 -4.64 2.51 -0.98 1.70 -1.22 -0.34 -1.68 1.89 -1.31 RB-stained AR-64 34 -36.77 -4.67 2.92 -0.68 3.71 -0.58 1.82 -0.89 1.70 -1.46 AR-65 23 -36.81 -4.68 2.67 -0.96 3.99 -0.68 -0.19 -1.35 AR-66 20 -36.81 -4.69 AR-67 54 -36.70 -4.67 0.16 -1.94 1.62 -1.08 AR-67 54 -36.70 -4.67 2.35 -1.51 RB-stained AR-67 54 -36.70 -4.67 1.89 -3.08 AR-68 39 -36.70 -4.68 3.42 -0.74 2.54 -0.97 0.86 -2.04 1.33 -1.38 AR-68 39 -36.70 -4.68 1.40 -1.64 RB-stained AR-68 39 -36.70 -4.68 1.54 -0.94 RB-stained AR-69 40 -36.70 -4.68 AR-70 34 -36.71 -4.69 3.55 -0.51 2.93 -0.74 0.82 -1.79 AR-71 31 -36.71 -4.70 AR-73 23 -36.72 -4.72 3.44 -1.56 2.80 -0.81 AR-74 21 -36.72 -4.73 2.70 -1.04 RB-stained AR-77 54 -36.74 -4.65 0.93 -1.85 AR-78 48 -36.75 -4.66 3.18 -0.67 1.19 -1.79 AR-79 36 -36.75 -4.67 2.42 -1.24 AR-80 32 -36.75 -4.68 3.61 -0.74 1.52 -1.33 AR-81 29 -36.76 -4.69 3.58 -0.76 2.60 -0.99 -0.24 -1.90 AR-81 29 -36.76 -4.69 0.70 -2.25 AR-82 27 -36.75 -4.70 3.04 -1.19 0.57 -2.08 0.01 -1.44 AR-82 27 -36.75 -4.70 3.61 -1.12 RB-stained 3.21 -0.71 iron-stained AR-82 27 -36.75 -4.70 3.53 -0.94 RB-stained AR-83 23 -36.76 -4.71 3.00 -1.39 RB-stained 3.35 -0.69 0.74 -1.46 2.62 -0.91 1.09 -1.28 AR-83 23 -36.76 -4.71 2.16 -1.46 AR-85 18 -36.77 -4.74 AR-87 19 -36.86 -4.71 3.63 -1.58 2.73 -1.39 1.68 -1.49 0.09 -1.89 2.58 -0.56 0.90 -1.53 AR-88 20 -36.85 -4.69 3.37 -1.15 0.05 -1.97 AR-88 20 -36.85 -4.69 2.13 -1.43 4.69 -0.88 3.92 -0.95 0.15 -1.80 AR-89 18 -36.84 -4.68 3.24 -0.63 AR-90 24 -36.84 -4.66 2.40 -1.72 4.30 -0.75 2.56 -1.13 AR-91 34 -36.83 -4.64 3.38 -0.85 2.07 -1.23 1.02 -1.26 AR-92 39 -36.83 -4.63 3.48 -1.31 2.87 -0.83 0.19 -2.04 2.28 -1.29 RB-stained -0.31 -1.02 AR 103 55 -36.97 -4.58 3.47 -0.63 -0.12 -1.71 RB-stained -0.19 -2.23 RB-stained -0.70 -1.86 RB-stained AR 103 55 -36.97 -4.58 0.15 -2.33 0.77 -1.17 RB-stained AR 104 46 -36.98 -4.58 3.42 -0.41 2.48 -0.98 0.73 -1.76 -0.22 -1.45 RB-stained AR 108 18 -36.99 -4.63 3.49 -1.12 2.50 -0.81 1.93 -1.14 RB-stained AR 113 43 -36.97 -4.60 2.23 -0.80 RB-stained 2.10 -0.82 -0.60 -2.37 AR114 48 -36.97 -4.59 1.66 -1.27 AR 115 55 -36.96 -4.58 1.79 -0.91 0.38 -2.04 AR 116 63 -36.96 -4.58 1.64 -1.11 -0.46 -1.90 2.50 -1.10 AR119 -0.42 -1.95 2.09 -1.30 RB-stained AR 120 1.90 -1.00 AR 131 37 -36.94 -4.60 3.52 -0.41 RB-stained 2.49 -0.87 0.36 -2.19 RB-stained AR 131 37 -36.94 -4.60 3.73 -0.73 RB-stained AR 132 48 -36.94 -4.58 0.22 -1.04 AR 133 75 -36.93 -4.57 2.81 -0.79 0.39 -1.94 2.60 -0.55 RB-stained AR138 13 -36.98 -4.66 2.27 -0.38 AR 140 38 -36.97 -4.60 3.67 -0.48 2.39 -1.02 -0.39 -1.51 RB-stained 1.56 -1.13 AR140 38 -36.97 -4.60 0.17 -1.97 2.24 -1.04 AR 141 48 -36.92 -4.59 2.20 -1.18 AR 142 65 -36.92 -4.58 1.31 -0.90 AR 143 55 -36.91 -4.59 2.10 -1.19 0.79 -1.88 2.18 -1.30 AR 144 38 -36.92 -4.59 2.69 -0.68 -0.31 -2.08 AR 144 38 -36.92 -4.59 0.72 -1.89 RB-stained AR 146 33 -36.92 -4.60 3.60 -0.85 -0.15 -1.85 RB-stained 2.25 -1.26 RB-stained AR 146 33 -36.92 -4.60 0.16 -2.03 AR 148 30 -36.92 -4.60 1.99 -0.28 0.30 -1.30 0.50 -2.06 AR 149 27 -36.92 -4.61 2.70 -0.84 0.43 -2.02 AR159 3.61 -0.69 RB-stained AR 160 31 -36.90 -4.61 0.98 -1.85 2.71 -0.96 AR 161 33 -36.90 -4.61 AR162 42 -36.89 -4.59 3.60 -0.80 AR 164 31 -36.91 -4.60 -0.29 -1.92 RB-stained AR165 0.36 -1.87 AR 167 27 -36.89 -4.63 2.02 -0.73 0.01 -2.27 2.41 -0.94 AR168 33 -36.89 -4.61 3.13 -0.81 RB-stained AR170 38 -36.88 -4.60 1.77 -1.11 0.13 -1.94 RB-stained AR192 2.49 -1.11 0.04 -1.28 -0.43 -2.07 2.65 -1.10 AR192 3.08 -0.95 AR195 42 -36.84 -4.63 3.14 -0.39 2.11 -0.91 0.62 -1.95 2.50 -1.30 AR195 42 -36.84 -4.63 3.38 -0.78 2.83 -0.76 2.63 -1.13 AR195 42 -36.84 -4.63 3.40 -1.02 AR197 18 -36.89 -4.66 2.44 -1.00 AR199 43 -36.83 -4.63 3.50 -0.73 1.22 -1.44 AR 200 36 -36.83 -4.64 0.57 -1.83 AR 200 36 -36.83 -4.64 3.69 -0.28 -0.67 -2.07 3.26 -0.37 RB-stained AR 201 29 -36.83 -4.65 3.44 -0.41 0.59 -1.25 AR203 33 -36.82 -4.65 -0.14 -1.51 AR205 54 -36.81 -4.63 1.69 -0.97 -0.58 -2.42 AR205 54 -36.81 -4.63 0.17 -1.96 RB-stained AR207 50 -36.80 -4.63 2.38 -1.63 3.37 -0.71 0.45 -2.17 1.81 -1.29 AR207 50 -36.80 -4.63 2.36 -1.04