Scientists uncover the mystery of Cork lake's disappearing marine sponges

Change in water chemistry could have affected the delicate ecosystem — but happily, there are signs of recovery at Lough Hyne

There was a strong decline in the numbers of sponges between about 2010 and 2015, with several possible causes, including outbreaks of disease, increases in nutrients or heatwaves. Picture: Professor Rob McAllen

The mystery of disappearing marine sponges from one of Ireland’s most incredible nature reserves may have a happy ending.

Scientists who’ve been studying and monitoring the loss of possibly thousands of sponges from the underwater cliffs inside Lough Hyne in West Cork have discovered a potential natural recovery of the affected species.