Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 20
Articles | Volume 22, issue 20
https://doi.org/10.5194/bg-22-6067-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-6067-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 20
Research article
 | 
24 Oct 2025
Research article |  | 24 Oct 2025

Quantifying the agricultural footprint on the silicon cycle: insights from silicon isotopes and Ge∕Si ratios

Sofía López-Urzúa, Louis Derry, and Julien Bouchez

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Short summary
Silicon (Si) is essential for ecosystem health and Earth's climate, yet human activities such as agriculture have significantly disrupted its natural cycle. In a French agricultural catchment, we found that crop harvesting removes most of the Si released from rocks – 1 to 4 times more than the dissolved Si transport downstream by rivers. Using geochemical tools, including Si isotopes and germanium-silicon ratio, we traced Si cycling and highlighted the impact of agriculture on Si exports.
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