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Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
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Updated: Sep 13, 2025

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Shell dissolution rates differ fourfold between mussel species.

Rachel R Carlson1,2,3, Mazie A Lewis1, Aaron T Ninokawa4

  • 1Bodega Marine Laboratory, University of California Davis, Bodega Bay, CA, USA.

Royal Society Open Science
|July 29, 2025
PubMed
Summary
This summary is machine-generated.

Ocean acidification severely impacts marine mussels. Freshwater-tolerant species like Mytilus trossulus show higher shell dissolution rates than Mytilus californianus, impacting future coastal populations.

Keywords:
calcificationclimate changecoastalfreshwatermusselocean acidification

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Area of Science:

  • Marine Biology
  • Oceanography
  • Climate Change Science

Background:

  • Ocean acidification threatens marine calcifiers, especially bivalves in the California Current System.
  • Mussels like *Mytilus californianus* and *M. trossulus* have distinct habitat preferences regarding salinity.

Purpose of the Study:

  • To determine abiotic shell dissolution rates of mussel congeners under varying ocean acidification conditions.
  • To quantify the contribution of shell interior versus exterior surfaces to dissolution.
  • To predict climate change impacts on coastal bivalve populations.

Main Methods:

  • Experimental analysis of shell dissolution rates across a range of pH (6.5-9.3) and aragonite saturation states (0.1-9.0).
  • Comparison of dissolution between *Mytilus californianus* and *Mytilus trossulus*.
  • Experimental sealing of shell interiors to assess the role of internal dissolution.

Main Results:

  • *Mytilus trossulus* exhibited fourfold higher shell dissolution rates compared to *Mytilus californianus*.
  • Sealing the shell interior significantly reduced dissolution rates in both species, highlighting internal dissolution.
  • Dissolution rates varied significantly between mussel congeners.

Conclusions:

  • Abiotic shell dissolution is a significant factor for mussel survival under ocean acidification.
  • The freshwater-tolerant species *M. trossulus* is more vulnerable to dissolution, with implications for low-salinity environments.
  • Differential dissolution rates between congeners can alter future intertidal population structures.