In accordance with SO #3423 - The Gulf of America and SO #3424 - Mount McKinley and Landmarks Honoring the Alaskan People, new USGS data releases specific to those named places will utilize the new name Gulf of America and the restored name Mount McKinley. Per USGS practice, historical data will retain the name of the geographic features as they were known at the time the data were originally released.
Data Release
Globorotalia truncatulinoides Sediment Trap Data in the Gulf of Mexico
By Caitlin E. Reynolds,1, 2 Julie N. Richey,1 Jennifer S. Fehrenbacher,3 Brad E. Rosenheim,2 and Howard J. Spero4
1 U.S. Geological Survey, St. Petersburg, FL 33701, USA
2 College of Marine Science, University of South Florida, St. Petersburg, FL 33701, USA
3 College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA
4 Department of Earth and Planetary Sciences, University of California Davis, Davis, CA 95616, USA
Summary
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. We use individual foraminiferal analysis (IFA) of G. truncatulinoides tests to investigate differences in the elemental (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.
For further information regarding data collection and/or processing methods as well as the associated published manuscript refer to Reynolds, C.E., Richey, J.N., Fehrenbacher, J.S., Rosenheim, B.E., and Spero, H.J., 2018, Environmental controls on the geochemistry of Globorotalia truncatulinoides in the Gulf of Mexico—Implications for paleoceanographic reconstructions: Marine Micropaleontology, https://doi.org/10.1016/j.marmicro.2018.05.006.
Note: This data release was versioned on September 11, 2023. Please see the Suggested Citation section for details.
Data
| File Name and Description | Metadata (XML format) | Metadata (text format) | Download File |
|---|---|---|---|
| Isotopes.zip δ18O and δ13C (.csv) |
Gtrunc_metadata.xml | Gtrunc_metadata.txt | Isotopes.zip (15 KB) |
| Mg_Ca_Compiled_all.zip Laser ablation (LA-ICP-MS) Mg and Ca values for every measurement on each individual foraminifera (.csv) |
Same as above | Same as above | Mg_Ca_Compiled_all.zip (2.1 MB) |
| Mg_Ca_Compiled_averages.zip Laser ablation (LA-ICP-MS) Mg and Ca values for every measurement averaged for each chamber on each individual foraminifera (.csv) |
Same as above | Same as above | Mg_Ca_Compiled_averages.zip (34 KB) |
| Raw_Counts_and_Flux_Data.zip G. truncatulinoides raw counts and flux (.csv) |
Same as above | Same as above | Data withdrawn* (13.5 KB) |
*Sediment trap foraminifera flux were incorrectly calculated per 0.5 m2 area instead of 1 m2 in this version of the dataset. Corrected data has been provided in a new data release, https://doi.org/10.5066/P9O76R8R.
Figure 1. Location of the sediment trap mooring in the Gulf of Mexico at approximately 27.5° N and 90.3° W (black triangle).
Suggested Citation
Reynolds, C.E., Richey, J.N., Fehrenbacher, J.S., Rosenheim, B.E., and Spero, H.J., 2018, Globorotalia truncatulinoides sediment trap data in the Gulf of Mexico (ver. 2.0 September 2023): U.S. Geological Survey data release, https://doi.org/10.5066/F72806W4.
First posted April 6, 2018
Revised September 11, 2023