Warming seas around the UK and the wider north-east Atlantic could destabilise marine food webs, weaken ocean health and jeopardise food security by 2050, according to a four-year study.

Scientists who projected the impact of climate breakdown on four key groups of marine life crucial to maintaining ocean ecosystems in the region said their results challenged assumptions that in middle latitudes, such as the UK, marine biodiversity was likely to increase across the board.

Instead, their projections highlight a predator-prey imbalance that could “fundamentally reshape marine ecosystems” in unforeseen ways, they said.