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Ecology and shell chemistry of Loxoconcha matagordensis

January 1, 2005

Studies of the seasonal ecology and shell chemistry of the ostracode Loxoconcha matagordensis and related species of Loxoconcha from regions off eastern North America reveal that shell size and trace elemental (Mg/Ca ratio) composition are useful in paleothermometry using fossil populations. Seasonal sampling of populations from Chesapeake Bay, augmented by samples from Florida Bay, indicate that shell size is inversely proportional to water temperature and that Mg/Ca ratios are positively correlated with the water temperature in which the adult carapace was secreted. Microprobe analyses of sectioned valves reveal intra-shell variability in Mg/Ca ratios but this does not strongly influence the utility of whole shell Mg/Ca analyses for paleoclimate application.

Citation Information

Publication Year 2005
Title Ecology and shell chemistry of Loxoconcha matagordensis
DOI 10.1016/j.palaeo.2005.05.022
Authors T. M. Cronin, T. Kamiya, G. S. Dwyer, H. Belkin, C.D. Vann, S. Schwede, R. Wagner
Publication Type Article
Publication Subtype Journal Article
Series Title Palaeogeography, Palaeoclimatology, Palaeoecology
Index ID 70029596
Record Source USGS Publications Warehouse