- The pH significantly influenced the biometric variables in Panopea globosa larvae.
- Larvae exposed to lower pH showed shell dissolution at the umbo level.
- The metabolic rate was higher in larvae exposed to acidification compared to the control.
- Nicotinamide adenine dinucleotide dehydrogenase expression levels to pH 7.5 suggest a higher energy requirement.
Ocean acidification generates a decrease in calcium carbonate availability essential for biomineralization in organisms such as mollusks. This effect was evaluated on Panopea globosa exposing for 7 days umbonate veliger larvae to two pH treatments: experimental (pH 7.5) and control (pH 8.0). Exposure to pH 7.5 affected growth, reducing larval shell length from 5.15–13.34% compared to the control group. This size reduction was confirmed with electron microscopy, also showing shell damage. The physiological response showed an increase in oxygen consumption in larvae exposed to low pH with a maximum difference of 1.57 nmol O2 h−1 larvae−1 at day 7. The gene expression analyses reported high expression values for nicotinamide adenine dinucleotide (NADH) dehydrogenase and Perlucin in larvae at pH 7.5, suggesting a higher energetic cost in this larval group to maintain homeostasis. In conclusion, this study showed that acidification affected development of P. globosa umbonate veliger larvae.
López-Landavery E. A., Carpizo-Ituarte E. J., Pérez-Carrasco L., Díaz F., Lafarga-De la Cruz F., García-Esquivel Z., Hernández-Ayón J. M. & Galindo-Sánchez C. E., 2021. Acidification stress effect on umbonate veliger larval development in Panopea globosa. Marine Pollution Bulletin 163: 111945. doi: 10.1016/j.marpolbul.2020.111945. Article (subscription required).