Climate-driven ocean warming and prey abundance may reshape North Sea ecosystems: systemic shifts in marine predator dynamics
Original framing: “Could warming seas bring great white sharks back to the North Sea? A 5-million-year-old shark tooth may provide clues” — The Conversation - Global
Paleoceanographic data confirms that North Sea temperatures during the Pliocene (3–5 million years ago) were 2–3°C warmer than pre-industrial levels, supporting shark viability. Modern tagging studies show great whites tracking prey like seals into higher latitudes, with sightings in Norway and Denmark increasing since 2010. However, scientific models often underestimate the role of anthropogenic noise and chemical pollution in displacing apex predators.
The potential return of great white sharks to the North Sea is not a quirk of ancient geology but a symptom of systemic marine collapse and uneven recovery.
Industrial fishing has hollowed out the region’s food webs, while warming waters and prey rebounds (seals, porpoises) create a false narrative of 'rewilding.' This mirrors historical patterns—such as the medieval depletion of North Sea sharks—where human extraction outpaces ecological resilience. Yet the solution lies not in passive observation but in decolonizing marine policy: centering Indigenous knowledge, dismantling fishing subsidies, and treating sharks as co-stewards rather than curiosities. The actors driving this shift must include small-scale fishers, whose exclusion from power structures has long obscured the true costs of 'business-as-usual' ocean governance.