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Biogeosciences An interactive open-access journal of the European Geosciences Union
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BG | Articles | Volume 15, issue 22
Biogeosciences, 15, 6959–6977, 2018
https://doi.org/10.5194/bg-15-6959-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 15, 6959–6977, 2018
https://doi.org/10.5194/bg-15-6959-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

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 et al.

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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.
Using a simple model, we show that the silicon isotopic composition of sponges can be used to...
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