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- Title
Sensitivity of the grooved carpet shell clam, Ruditapes decussatus (Linnaeus, 1758), to ocean acidification.
- Authors
Awad, Merna E.; Madkour, Fedekar F.; Shaltout, Nayrah A.; Abu El-Regal, Mohamed; Elshazly, Ahmed; El-Wazzan, Eman
- Abstract
This research investigated the possible impacts of ocean acidification on the grooved carpet shell clam Ruditapes decussatus as a model for commercially crucial marine bivalve species. Clams were collected from Lake Timsah on the Suez Canal coast, Ismailia, Egypt. They were then incubated in CO2-enriched seawater manipulated at four different CO2 concentrations: 420 ppm (ambient control) and 550, 750, and 1050 ppm. Calcification analysis was carried out using XRD and scanning electron microscope (SEM), highlighting a trend towards noticeable physical sensitivity to acidification. The antioxidant enzymatic activities [catalase (CAT)] were significantly different among different pCO2 (~ 20–23 µmol min−1 mg prot−1). Lipid peroxidation [malondialdehyde (MDA)] also showed a significant difference among treatments (0.21–0.23 nmol TBARS mg prot−1). Shell microstructure analysis showed periostracum distortion in the clam shell as pCO2 concentration increased at 1050 ppm. These results indicate that ocean acidification may exert an additional stress on bivalves through weakening their calcified shell making them more vulnerable to predators and affect their health and survival reducing production and economic value.
- Subjects
SUEZ Canal (Egypt); OCEAN acidification; BIVALVE shells; SCANNING electron microscopy; PEROXIDATION
- Publication
Arabian Journal of Geosciences, 2023, Vol 16, Issue 2, p1
- ISSN
1866-7511
- Publication type
Article
- DOI
10.1007/s12517-022-11125-y