Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 56, Issue 7, Pages 4324-4335Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.1c06735
Keywords
ocean acidification; global warming; metabolism; circadian rhythm; neurotransmitter; mussels
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Funding
- National Key R&D Program of China [2018YFD0900603]
- Zhejiang Major Program of Science and Technology [2021C02069-7]
- National Science Foundation of China [32172944, 31902358]
- Open Fund of Key Laboratory of Marine Ecosystem Dynamics, SIO [MED2020004]
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This study investigated the effects of ocean acidification and warming on the metabolism of thick-shell mussels. The results showed that acidification and warming significantly affected mussel metabolism and led to a shortage of energy supply. Additionally, these stressors disrupted circadian rhythm and neurotransmitters.
Although the impacts of ocean acidification and warming on marine organisms have been increasingly documented, little is known about the affecting mechanism underpinning their interactive impacts on physiological processes such as metabolism. Therefore, the effects of these two stressors on metabolism were investigated in thick-shell mussel Mytilus coruscus in this study. In addition, because metabolism is primarily regulated by circadian rhythm and neurotransmitters, the impacts of acidification and warming on these two regulatory processes were also analyzed. The data obtained demonstrated that the metabolism of mussels (indicated by the clearance rate, oxygen consumption rate, ammonia excretion rate, 0:N ratio, ATP content, activity of pyruvate kinase, and expression of metabolism-related genes) were significantly affected by acidification and warming, resulting in a shortage of energy supply (indicated by the in vivo content of ATP). In addition, exposure to acidification and warming led to evident disruption in circadian rhythm (indicated by the heartrate and the expression rhythm of Pert, Cry, and BMALI) and neurotransmitters (indicated by the activity of acetyl cholinesterase and in vivo contents of ACh, GABA, and DA). These findings suggest that circadian rhythms and neurotransmitters might be potential routes through which acidification and warming interactively affect the metabolism of mussels.
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