Articles | Volume 12, issue 11
https://doi.org/10.5194/bg-12-3489-2015
https://doi.org/10.5194/bg-12-3489-2015
Technical note
 | 
05 Jun 2015
Technical note |  | 05 Jun 2015

Technical Note: Silica stable isotopes and silicification in a carnivorous sponge Asbestopluma sp.

K. R. Hendry, G. E. A. Swann, M. J. Leng, H. J. Sloane, C. Goodwin, J. Berman, and M. Maldonado

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The stable isotope composition of benthic sponge silica skeletons (spicules) has been shown to be a source of useful palaeoceanographic information about past deep seawater chemistry. Here, we investigate the biological vital effects on silica stable isotope composition in a Southern Ocean carnivorous sponge, Asbestopluma sp. We find significant variations in isotopic composition within the specimen – in both silicon and oxygen isotopes – that appear to be related to unusual spicule growth.
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