Blue Carbon Potential of Oyster: review of global oyster production and annual growth rate

Oysters have been considered as an important candidate for blue carbon due to their ability to store carbon through calcification. This study aims to compare the growth of major cultured oyster species for effective carbon sequestration and determine the impact of climate change on oyster growth. The results showed that suspended cultured Crassostrea angulata and Magallana gigas had high carbon sequestration potential efficiencies (CSE) of 2.98 and 2.89, while bottom cultured Ostrea edulis had the lowest CSE of 1.03. Oysters' optimal growth sea surface temperature (SST) was 24–28 ℃, and the optimal salinity was around 25psu. Comparing past and present M. gigas growth with a 1 ℃ increase in SST due to climate change did not show significant differences. However, mortality increased dramatically due to the rise in diseases caused by climate change. This study supports global oyster management and conservation efforts while contributing to essential biological data collection.