1 Introduction Climate change is rapidly transforming marine ecosystems, with ocean temperatures rising faster than many species can adapt (IPCC 2021, 2022). These physical changes are driving widespread shifts in the abundance, distribution, and quality of marine prey communities, particularly zooplankton and forage fish, which cascade up the food web and ultimately affect the fitness and viability of marine top predators such as seabirds (Hollowed et al. 2013; Hastings et al.