Is the Arctic copepod Calanus glacialis subject to metabolic trade-offs when exposed to heatwaves and ocean acidification

Present day marine environment is under pressure from multiple changing environmental factors driven by global climate change (GCC) such as extreme event like heatwaves (HW) and ocean acidification (OA). The Arctic has been identified as the most vulnerable region in regards to GCC and will undergo the greatest changes in its both physical and chemical environments. In order to thrive in the future conditions of the Arctic marine environment, zooplankton species will have to adapt to these multiple factors and to invasion of temperate species transported more and more to the North. Pan-Arctic project on OA effects on copepods investigates on the mechanism underlying copepods adaptation to decrease in pH, but has not yet looked upon the possible trade-off between thermal and chemical tolerance capacity. Such functional trade-off would result in altered tolerance to future environmental conditions and would impact Arctic pelagic communities in many ways.