Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 20
Articles | Volume 23, issue 20
https://doi.org/10.5194/bg-23-7627-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-7627-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 20
Research article
 | 
29 Oct 2026
Research article |  | 29 Oct 2026

Shell hash promotes growth in Pacific littleneck clams (Leukoma staminea) by altering pore water chemistry

Hannah L. Kempf, Alyssa J. Griffin, Gabriel Ng, Tessa M. Hill, Tsim D. Schneider, Sandra J. Carlson, and David A. Gold

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Short summary
We studied whether mixing crushed shell into sediment can help Pacific littleneck clams cope with acidic seawater. In a 90-day experiment, young clams grew better with shell material present, even under acidic conditions. The shell pieces raised sediment water acidity levels in a helpful way, and clam growth looked much like clams in normal seawater. This suggests a simple, practical way to protect valuable shellfish and support healthier coastal ecosystems.
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