Ostracod sieve pores as salinometers – Paper published

A paper with first results from the microcosm component of WP B (Micropalaeontology) of Project CLEAR recently went online with the Journal of Micropalaeontology. By investigating shapes of sieve pores in the species Cyprideis torosa (Jones) under a range of different salinities (0.6-14.8 psu), Peter Frenzel (FSU), Judith Ewald and Anna Pint (both UC) were able to identify a significant inverse correlation between the amount of rounded sieve pores and ambient water salinity, with minor influences of ionic composition. The outcome of the microcosm experiments corroborate results from studies of ostracod sieve pores in marginal marine environments, where this relationship has been proposed previously. The dataset established by Peter, Judith and Anna provides an important reference for systematically applying the proxy of sieve-pore variability to the palaeo-record of Tayma.

Figure 1 from Frenzel et al. (2016): Left valve of Cyprideis torosa from a low-salinity microcosm. On the scanning electron microphotographs below, the different sieve-pore categories are depicted (from left to right): round (fossil), round (recent), irregular, elongate.



Frenzel, P., Ewald, J., Pint, A., 2016. Salinity-dependent sieve pore variability in Cyprideis torosa: an experiment. Journal of Micropalaeontology, DOI: .


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