Due to continuously increasing global warming and ocean acidification problems, the productivity of the marine ecosystems may also decrease, due to climate change. Thus, depending on the timing of phytoplankton blooms, it is possible for marine bivalves to be subjected to reduced food conditions and other environmental stressors like ocean acidification and warming, especially in the high intertidal zone. The underlying strategies that how marine organisms modify their energy demand in the presence of global warming and, increased pCO₂ conditions under the influence of different food availability conditions still warrants further investigation. In the current research study we have tried an attempt to address this approach. The data obtained indicated that metabolism, circadian rhythm and energy pathway of mussels indicated by the 5-HT and T3 hormones activities, respiratory enzyme activities, ATP, glycogen contents, metabolism related parameters, circadian rhythm related genes, clearance rate and respiration rate, were significantly affected by warming, acidification and food shortage and resulted in energy limitation in mussels. Histopathological signs in the digestive glands of mussels were also observed. Thermal tolerance data showed that M. coruscus has the strong potential to adapt to environmental stressors, having broad spectrum of thermal tolerance ranges. Enough food strengthens mussels adoption and resilience responses to fight against environmental stressors. Our findings suggest that possibly bivalves control their energy production pathway by regulating serotonin and T3 hormones and enough food boost this process.
 

global warming, global climate change, ocean acidification, food shortage, metabolism, energy pathway