Caitlin E. Reynolds
20230911
Globorotalia truncatulinoides Sediment Trap Data in the Gulf of Mexico
2.0
tabular digital data
Caitlin E. Reynolds
Julie N. Richey
Jennifer S. Fehrenbacher
Brad E. Rosenheim
Howard J. Spero
20180406
Globorotalia truncatulinoides Sediment Trap Data in the Gulf of Mexico
U.S. Geological Survey data release
doi:10.5066/F72806W4
St. Petersburg, Florida
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
2018a
https://doi.org/10.5066/F72806W4
Modern observations of planktic foraminifera from sediment trap studies help to constrain the regional ecology of paleoceanographically valuable species. Results from a weekly-resolved sediment trap time series (2008–2014) in the northern Gulf of Mexico demonstrate that 92% of Globorotalia truncatulinoides flux occurs in winter (January, February, and March), and that encrusted and non-encrusted individuals represent calcification in distinct depth habitats. Individual foraminiferal analysis (IFA) of G. truncatulinoides tests were used to investigate differences in the elemental Magnesium/Calcium (Mg/Ca) and isotopic composition (δ18O and δ13C) of the encrusted and non-encrusted ontogenetic forms of G. truncatulinoides, and to estimate their calcification depth in the northern Gulf of Mexico. Estimates show that non-encrusted and encrusted G. truncatulinoides have mean calcification depths of 66 ± 9 meters and 393 ± 83 meters, respectively. The Mg/Ca-calcification temperature relationship was validated for G. truncatulinoides and demonstrated that the δ18O and Mg/Ca of the non-encrusted form is a suitable proxy for winter surface mixed layer conditions in the Gulf of Mexico. Care should be taken not to combine encrusted and non-encrusted individuals of G. truncatulinoides for down core paleoceanographic studies. For further information regarding data collection and/or processing methods as well as the associated published manuscript refer to Reynolds and others (2018b).
This information was used to (1) validate the Mg/Ca-calcification temperature relationship for G. truncatulinoides, (2) demonstrate that the non-encrusted form calcifies in the surface mixed layer, while the crust forms well below the seasonal thermocline, and (3) demonstrate that Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) analyses of single foraminifera can be used to yield comparable elemental ratios to that obtained from solution-based analyses.
To ensure that USGS-St. Petersburg data management protocols were followed, each survey was assigned the following USGS FANs: 08CEV01–08CEV04, 09CEV01, 09CEV02, 10CEV01, 10CEV04, 11CEV01, 11CEV03, 12CEV01, 12CEV02, 13CEV01, and 13CEV03. Additional survey and data details are available from the U.S. Geological Survey Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/.
20080118
20140525
ground condition
None planned
-90.3
-90.3
27.5
27.5
USGS Metadata Identifier
USGS:bc4eb326-4538-4533-8712-ba3473356680
ISO 19115 Topic Category
biota
geoscientificInformation
oceans
environment
USGS Thesaurus
marine geology
ecology
geochemistry
protists
foraminifera
plankton
micropaleontology
light stable isotope analysis
carbon isotope analysis
oxygen isotope analysis
Geographic Names Information System (GNIS)
Gulf of Mexico
Louisiana
None. Please see 'Distribution Info' for details.
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests that it be acknowledged as the originator of this dataset in any future products or research derived from these data.
U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center
Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1 (Build 4959) Service Pack N/A (Build N/A)
Reynolds, C.E., Richey, J.N., Fehrenbacher, J.S., Rosenheim, B.E., and Spero, H.J.
20180607
Environmental controls on the geochemistry of Globorotalia truncatulinoides in the Gulf of Mexico—Implications for paleoceanographic reconstructions
Marine Micropaleontology
Volume 142
2018b
https://doi.org/10.1016/j.marmicro.2018.05.006
Vetter, L., Spero, H. J., Russell, A. D., and Fehrenbacher, J. S.
2013
LA-ICP-MS depth profiling perspective on cleaning protocols for elemental analyses in planktic foraminifers
Geochemistry Geophysics Geosystems
Volume 14, No. 8
https://doi.org/10.1002/ggge.20163
Fehrenbacher, J. S., Spero, H. J., Russell, A. D., Vetter, L., and Eggins, S.
2015
Optimizing LA-ICP-MS analytical procedures for elemental depth profiling of foraminifera shells
Chemical Geology
Volume 407
https://doi.org/10.1016/j.chemgeo.2015.04.007
Paton, C., Hellstrom, J., Paul, B., Woodhead, J., and Hergt, J.
2011
Iolite: Freeware for the visualization and processing of mass spectrometric data
Journal of Analytical Atomic Spectrometry
Volume 26, No. 12
https://doi.org/10.1039/C1JA10172B
Reynolds, C.E. and Richey, J.N.
20230731
Gulf of Mexico sediment trap foraminifera data
U.S. Geological Survey data release
doi:10.5066/P9O76R8R
St. Petersburg, FL
U.S. Geological Survey
https://doi.org/10.5066/P9O76R8R
No formal attribute accuracy tests were conducted.
No formal logical accuracy tests were conducted.
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted.
A formal accuracy assessment of the vertical positional information in the dataset has either not been conducted or is not applicable.
134 encrusted (C) and non-encrusted (NC) G. truncatulinoides specimens were picked based on availability from January 2010 through March 2014. Whole shell G. truncatulinoides were cleaned according to modified procedures for laser ablation (Vetter and others, 2013; Fehrenbacher and others, 2015). Samples were cleaned by ultrasonicating in methanol followed by triple-rinsing in Milli-Q water (18.2 megohmcentimeters [MΩ-cm]). Shells were then oxidatively cleaned at 60° Celsius (C) for 30 minutes in a buffered hydrogen peroxide solution (1:1 mix of 30% hydrogen peroxide and 0.1N sodium hydroxide [NaOH]) to remove remnant organic matter. Finally, the shells were again triple rinsed in Milli-Q water. Once dry, each individual's length was measured across the diameter of the umbilical side, from the tip of the final chamber to the opposite side and weighed on a microbalance. 1 error on length measurements (± 16 micrometers [µm]) and weight measurements (± 0.6 micrograms [µg]) are based on repeated measurements by separate analysts.
Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was conducted at The University of California, Davis Stable Isotope Laboratory, using Photon Machines 193 nm ArF ultraviolet (UV) excimer laser with an ANU HelEx dual-volume laser ablation cell coupled to an Agilent 7700x quadrupole-ICP-MS. G. truncatulinoides specimens were placed on double sided carbon tape, spiral side up, to ensure a horizontal sampling surface for each chamber. Laser spot size of 44x44 µm in diameter was used with a repetition rate of 6 hertz (Hz) (non-encrusted forms) and 8 Hz (encrusted forms). For the smallest foraminifera, the spot size was decreased to 30x30 µm to ensure ablation within a single chamber. Depth profiles were obtained on each chamber (F through up to F7). If chambers were large enough, up to 3 repeat spot analyses were obtained to assess reproducibility. Masses measured were 24Mg, 25Mg, 27Al, 44Ca, 55Mn, 88Sr, 89Y, and 138Ba. Standard Reference Materials under the National Institute of Standards and Technology (SRM NIST) 610, 612, and 614 glass standards were run before and after each batch of samples as an external standard. An Orbulina universa shell, which is demonstrated to have highly reproducible trace element profiles throughout, was analyzed before and after each run as an internal working standard (7.0 ± 0.7 mmol/mol Mg/Ca, 2σ, Fehrenbacher and others, 2015). Outliers in the Mg/Ca profiles that were greater than ± 6 standard deviations from a 3-point rolling mean were removed from raw LA-ICP-MS signals, then data were reduced using Iolite Software (Paton and others, 2011).
Stable isotopes, δ18O and δ13C of calcite (δ18Oc and δ13Cc), were analyzed on individual foraminifera, ranging in weight from 5 to 95 µg, after LA-ICP-MS analyses were completed. Foraminifera were roasted under vacuum at 75°C for 1 hour to eliminate remaining volatile organics from carbon tape. Isotopic analyses were performed at The University of California, Davis Stable Isotope Laboratory, on a Fisons Optima isotope ratio mass spectrometer (IRMS). The IRMS is calibrated using the NBS-19 standard and has a long-term one sigma precision for carbonates ± 0.04 ‰ and ± 0.05 ‰ for δ13Cc and δ18Oc, respectively. This is based on 110 standards analyzed during the summer 2016.
20160422
Level 5 revision: The G. truncatulinoides raw counts and flux dataset (Raw_Counts_and_Flux_Data.csv) were withdrawn from this data release in September 2023. The sediment trap foraminifera flux data were incorrectly calculated per 0.5 meter-squared area instead of 1 meter-squared in the original version. Corrected data has been provided in a new data release, https://doi.org/10.5066/P9O76R8R (Reynolds and Richey, 2023). Please refer to that data release and its associated metadata for more information.
20230911
Isotopes.csv
Individual foraminiferal analysis (IFA) was used to investigate the isotopic composition of the encrusted and non-encrusted ontogenetic forms of G. truncatulinoides collected between October 2009 and May 2014. Values obtained from the measurement of the ratio of stable isotopes oxygen-18 (d18O), oxygen-16 (d16O), carbon-13 (d13C) and carbon-12 (d12C) are included in this table.
USGS
Sample Name
Sediment Trap Sample identification
USGS
The naming convention used to identify each foraminifera sample is as follows: xx-y-NCz, where xx refers to the Gulf of Mexico sediment trap cruise number; xx is between 6 and 14. The 1- or 2-digit integer, y, represents the sediment trap cup number, values range from 1 to 20. The last value, NCz (NC1–NC8), refers to encrusted (C) G. truncatulinoides or non-encrusted (NC) G. truncatulinoides and its individual foraminifera number (z).
d13C (per mil relative to VPDB)
Isotopic signature of 13C:12C, reported in parts per thousand relative to the Vienna Pee Dee Belemnite (VPDB).
USGS
-1.11
0.91
d18O (per mil relative to VPDB)
Isotopic signature of 18O:16O, reported in parts per thousand relative to the Vienna Pee Dee Belemnite (VPDB).
USGS
-1.13
1.59
Mg_Ca_Compiled_all.csv
Individual foraminiferal analysis (IFA) was used to investigate the elemental Magnesium/Calcium (Mg/Ca) composition of the encrusted and non-encrusted ontogenetic forms of G. truncatulinoides. Laser ablation (LA-ICP-MS) Mg and Ca values for every measurement on individual foraminifera are included in this comma separated values (CSV) file. Blank cells indicate no Mg ppm (m24), Ca ppm (m44), and Mg/Ca (mmol/mol) data was recorded.
USGS
FAN
The U.S. Geological Survey St. Petersburg Coastal and Marine Science Center assigns a unique identifier, known as a field activity number (FAN), to each field survey or cruise.
USGS
The naming convention used for each field activity number. Each cruise number (6-14) uses a different FAN number.
Sample Name
Unknown
USGS
The naming convention used to identify each foraminifera sample is as follows: xx-y-NCz, where xx refers to the Gulf of Mexico sediment trap cruise number; xx is between 6 and 14. The 1- or 2-digit integer, y, represents the sediment trap cup number, values range from 1 to 20. The last value, NCz (NC1–NC8), refers to encrusted (C) G. truncatulinoides or non-encrusted (NC) G. truncatulinoides and its individual foraminifera number (z).
Chamber
Unknown
USGS
The first value (F0) refers to the chamber number (F0-F7) ablated on each individual foraminifera. The second value (IntegrationNo) refers to the automatic naming from the instrumentation output.
Elapsed Time (s)
Time in seconds
USGS
0
273.256
Mg ppm (m24)
Measured Magnesium in parts per million.
USGS
70.36339
15429.42
Ca ppm (m44)
Measured Calcium in part per million.
USGS
182514
1336423
Mg/Ca (mmol/mol)
This calculation is based on the following equation Mg/Ca (mmol/mol) =Mg ppm(m24)/Ca ppm(m44)*(40.078/24.305)*1000
USGS
0.300415105
81.90071251
Mg_Ca_Compiled_averages.csv
This CSV file contains laser ablation (LA-ICP-MS) Mg and Ca values for every measurement averaged for each chamber on the individual foraminifera.
USGS
Output
Refers to the automatic naming from the instrumentation output.
USGS
The first type (Output_1_x) refers to the output file from each spot ablated, the x ranges from 1-207. The second type (G_NIST610_y) refers to a standard that was run before and after all samples, the y values range from 1-4.
Sample Name
Sediment trap sample identification.
USGS
The naming convention used to identify each foraminifera sample is as follows: xx-yNCz, where xx refers to the Gulf of Mexico sediment trap cruise number; xx is between 6 and 14. The 1- or 2-digit integer, y, represents the sediment trap cup number, values range from 1 to 20. The last value, NCz (NC1–NC4), refers to encrusted (C) G. truncatulinoides or non-encrusted (NC) G. truncatulinoides and its individual foraminifera number (z). There is an automatic instrumentation naming convention from the source file after each sample name, _A.D, _B.D, or _C.D.
Duration(s)
Time in seconds (s).
USGS
3.3071
273.48
Mg_ppm_m24
Measured Magnesium in parts per million.
USGS
198.4
5290
Ca_ppm_m44
Measured Calcium in parts per million.
USGS
366000
437000
Mg/Ca (mmol/mol)
This calculation is based on the following equation Mg/Ca (mmol/mol) =Mg ppm(m24)/Ca ppm(m44)*(40.078/24.305)*1000
USGS
0.784541693
21.53828227
The entity and attribute information provided here describes the tabular data associated with the dataset. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data et.
The entity and attribute information were generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information.
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Caitlin E. Reynolds
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
(727) 502-8046
creynods@usgs.gov
Isotopes.csv; Mg_Ca_Compiled_all.csv; Mg_Ca_Compiled_averages.csv
Distributor assumes no liability for misuse of data. This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
comma-delimited text
https://coastal.er.usgs.gov/data-release/doi-F72806W4/data/Isotopes.zip
https://coastal.er.usgs.gov/data-release/doi-F72806W4/data/Mg_Ca_Compiled_all.zip
https://coastal.er.usgs.gov/data-release/doi-F72806W4/data/Mg_Ca_Compiled_averages.zip
None. No fees are applicable for obtaining the dataset.
20230911
U.S. Geological Survey
Caitlin E. Reynolds
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8046
creynolds@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998