Published December 8, 2025 | Version v1
Journal article Open

RESISTANCE ANALYSIS OF THE SHELL OF THE BIVALVE CRASSOSTREA BRASILIANA UNDER OCEAN ACIDIFICATION AND METAL EXPOSURE

Authors/Creators

  • 1. ROR icon Universidade Santa Cecília
  • 2. ROR icon Universidade Federal de São Paulo

Description

Calcifying marine organisms respond critically to decreased CaCO₃ 
saturation due to ocean acidification and metal accumulation, slowing growth and 
calcification. This study evaluated the effects on the shell structure of the bivalve 
Crassostrea brasiliana under multiple stressors: marine acidification and sediment Pb 
contamination. The experiment exposed the organisms to three pHs (8.0, 7.6, 7.2) and 
Pb (30 and 210 mg/L). After exposure, shell strength was measured using a mechanical 
press. The results showed that strength was affected by both pH and Pb, with the effects 
of metal being more critical under predicted acidification scenarios.  

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