Articles | Volume 15, issue 22
https://doi.org/10.5194/bg-15-6959-2018
https://doi.org/10.5194/bg-15-6959-2018
Research article
 | 
21 Nov 2018
Research article |  | 21 Nov 2018

Silicon isotopes of deep sea sponges: new insights into biomineralisation and skeletal structure

Lucie Cassarino, Christopher D. Coath, Joana R. Xavier, and Katharine R. Hendry

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Cited articles

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Using a simple model, we show that the silicon isotopic composition of sponges can be used to estimate the silicic acid concentration of seawater, a key parameter linked to nutrient and carbon cycling. However, our data illustrate that skeletal type and growth rate also control silicon isotopic composition of sponges. Our study demonstrates the paleoceanographic utility of sponges as an archive for ocean silica content provided that suitable skeleton types are selected.
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