Recent reports have highlighted a troubling increase in chlorophyll levels within the Mar Menor lagoon, which are now five times greater than those recorded in two thousand and twenty-three. This alarming rise is attributed to intensified phytoplankton activity, driven by rising temperatures and excess nutrient flow into the lagoon. While chlorophyll plays a vital role in marine ecosystems, excessive levels indicate a severe imbalance, resulting in murky waters that hinder sunlight penetration and threaten underwater plant life.

According to the Mar Menor Scientific Committee, the heightened chlorophyll levels have led to a reduction in dissolved oxygen, creating conditions for hypoxia, which poses a serious risk to marine life. In response to this environmental pressure, regional authorities have stepped up their clean-up initiatives. Between January and July this year, clean-up operations successfully removed four thousand two hundred and forty-six tonnes of biomass from the coastline, supported by daily teams of approximately one hundred personnel.

The clean-up effort has seen a significant boost, with a total of eleven thousand two hundred and eighty personnel deployed across two thousand two hundred and fifty-six brigades— a thirty per cent increase in workforce compared to the previous year. This ongoing operation is backed by a multi-year contract worth thirteen point two million euros, with seven point one million euros allocated for the current year alone. Councillor Juan María Vázquez emphasised the importance of these efforts in mitigating ecosystem disturbances.

Despite these concerted clean-up actions, environmental scientists stress that deeper systemic issues remain. They highlight the necessity of curtailing nutrient runoff and managing climate pressures more effectively to secure the long-term health of the Mar Menor lagoon. Without addressing these underlying challenges, the lagoon’s ecological prospects remain precarious.