Journal
OCEAN MODELLING
Volume 173, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ocemod.2022.101992
Keywords
Ocean acidification; Mitigation; Ecosystem model; Material cycle; Eelgrass; Oyster
Categories
Funding
- National Institute for En-vironmental Studies, Japan (NIES) [S-15]
- Environment Research and Technology Development Fund [S-15]
- Ministry of the Environment, Japan
- Japan Society for the Promotion of Science (JSPS) KAKENHI [JP 16H01792, JP 21K19854]
- Climate Change Adaptation Research Program of NIES
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Ocean acidification has adverse effects on marine ecosystems and aquaculture. This study reveals that without the presence of eelgrass beds, the impact of acidification on oysters becomes more significant, highlighting the importance of maintaining eelgrass beds to alleviate acidification effects.
It is well known that ocean acidification (OA) inhibits growth of marine calcifying organisms. Therefore, the adverse effects of acidification on marine ecosystems and aquaculture, such as oyster farming, are of concern. Since eelgrass beds in neritic areas have a high potential for carbon assimilation, this study focuses on local scale mitigation of OA effects. Using a three-dimensional lower-trophic system ecosystem model, we modeled nitrogen and carbon cycles, and the dynamics of carbonate parameters in a subarctic shallow lagoon and bay, where nitrogen availability limits the photosynthesis of primary producers. Simulation of the present conditions allowed reproduction of spatiotemporal variations in water quality and, by assuming future environmental changes quantitatively, revealed that the progress of OA significantly elevated the probability of shell malformation in juvenile oysters. The results represent the spatiotemporal variations in carbonate parameters inside and outside eelgrass beds and enable the evaluation of the alleviation effect on local acidification by the presence of a dense eelgrass bed. Our study shows that in the absence of the eelgrass bed scenario, the effect of OA on oysters became more remarkable. The simulations revealed that maintaining eelgrass beds is essential to mitigate the effects of acidification on oysters.
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