Abstract

We present results here from a high-resolution (1-2 weeks) and long-running sediment trap time series from the northern Gulf of Mexico which allows for a detailed assessment of the seasonal distribution, size, morphological variability and geochemistry of co-occurring pink and white chromotypes of Globigerinoides ruber. The flux of both chromotypes is highly correlated, and both represent mean annual conditions in the surface mixed-layer. Under modern climatic conditions in the Gulf of Mexico, we find no significant offset in the Mg/Ca and delta 18O of co-occurring pink and white G. ruber. Furthermore, we find the delta 18O and delta 13C among the two morphotypes (sensu stricto and sensu lato) of both pink and white G. ruber to be indistinguishable. The test size distribution within the population varies seasonally, with the abundance of large individuals increasing (decreasing) in summer (winter). Using paired …

Date

2019

Authors

Julie N Richey, Kaustubh Thirumalai, Deborah Khider, Caitlin E Reynolds, Jud Partin, Terrence M Quinn

Journal

US Geological Survey (USGS) Data Release

Pages

43