Large jellyfish blooms reported in UK seas

Experts link rising jellyfish populations to global heating and warmer seas.

Record numbers of jellyfish invade UK waters this summer

Experts report an unusual surge of jellyfish in the UK’s waters this summer, attributed to warm sea surface temperatures that favor their reproduction. The Met Office indicates that record-high temperatures in April and May are contributing to an increase in jellyfish sightings, with a 32% rise noted by the Marine Conservation Society compared to the previous year. Species like the barrel jellyfish, which can reach one meter in diameter, and the compass jellyfish, known for its painful sting, have been particularly prominent. These jellyfish blooms are expected to support marine food chains and may introduce new species that thrive in warmer waters. However, their presence is only temporary, as jellyfish have short lifespans and will dissipate as summer ends, influenced by conditions like food supply and extreme weather.

The significant increase in jellyfish sightings is a telling sign of shifting marine ecosystems driven by climate change. Abigail McQuatters-Gollop from the University of Plymouth points out that the deterioration of water quality and habitat stability will likely lead to more frequent jellyfish blooms. This trend raises concerns about how changing marine environments will affect the species that depend on jellyfish as a food source. As coastal waters become warmer due to climate change, the arrival of new jellyfish species could alter the local ecology, impacting both fisheries and recreation as human interactions with these creatures rise. It highlights an urgent need to address climate change impacts to maintain ecological balance.

Highlights

Addressing climate change is crucial for marine ecosystem health.