Neogloboquadrina pachyderma LA-ICP-MS spectral files and stable isotope data from: Geochemical differences between alive, uncrusted and dead, crusted shells of Neogloboquadrina pachyderma: Implications for paleoreconstruction ...

• Main Authors: Hupp, Brittany, Fehrenbacher, Jennifer
• Format: Dataset
• Language: English
• Published: Dryad 2023
• Subjects: FOS Other natural sciences; Planktic foraminifera; vital effects; trace element geochemistry; crust; Gametogenesis; Biomineralization; Ortiz; Neogloboquadrina pachyderma
• Online Access: https://dx.doi.org/10.5061/dryad.gtht76hsk; https://datadryad.org/stash/dataset/doi:10.5061/dryad.gtht76hsk

Planktic foraminiferal-based trace element-calcium ratios (TE/Ca) are a cornerstone in paleoceanographic reconstructions. While TE-environment calibrations are often established through culturing experiments, shell growth in culture is not always consistent with growth in a natural setting. For example, many species of planktic foraminifera thicken their shell at the end of their life cycle, producing a distinct ‘gametogenic’ crust. Crust is common in fossil foraminifers, however, shells grown in culture do not often develop a thick crust. Here we investigate potential vital effects associated with the crusting process by comparing the trace element (Mg/Ca, Na/Ca, Ba/Ca, Sr/Ca, Mn/Ca, Zn/Ca) and stable isotope (δ13C, δ18O) composition of alive, fully mature, uncrusted shells to recently deceased, crusted shells of Neogloboquadrina pachyderma collected from the same plankton tows off the Oregon (USA) coast. We find that uncrusted (N = 55) shells yield significantly higher Ba/Ca, Na/Ca, Mn/Ca, and Sr/Ca than ... : Sampling Neogloboquadrina pachyderma were collected from two stations along the Newport Hydrographic (NH) Line off the Oregon coast: NH85 (44.652oN, 126.050oW) and NH45 (44.652oN, 125.117oW) in May 2022. N. pachyderma are an asymbiotic, non-spinose taxon found abundantly in the study region when cooler waters are present (Ortiz and Mix, 1992; Takagi et al., 2019; Lane et al., 2023), and they serve as an important species to reconstruct polar to subpolar paleoceanographic conditions. A 150 μm plankton tow net was used to sample the uppermost 200 m of the water column, sampled as two continuous tows from 200 m depth to the surface. While N. pachyderma have been found at greater depth habitats in other regions (i.e., Greco et al., 2019), the sampling was constrained to the upper 200 m of the water column to ensure that we were sampling populations calcifying from the same water depth and that geochemical differences between alive, uncrusted and dead, crusted could be directly attributed to the process of ...