Rare lichen found thriving in Cumbrian river

The discovery was made during a routine ecology survey on the River Sprint

One of the world's rarest lichens has been found "thriving" in a Cumbrian River, the Environment Agency has said.

Rock-hugging river jelly lichen was discovered along the River Sprint for the first time, in what the agency described as a "significant biodiversity milestone".

The species only lives in very clean waters and it is believed there are fewer than 15 populations remaining in England.

Only one other population of the lichen has been reported in Cumbria in recent years, with the species present along the River Eden.

Populations also have a small stronghold in the River Lune and some Lake District still-waters.

'Exciting discovery'

Teams from the Environment Agency discovered the river jelly lichen during a routine ecology survey.

It only thrives in freshwater environments with excellent water quality and minimal silt accumulation.

Rebecca Ramsden, analysis and reporting team leader, said the "exciting discovery" showed the importance of "rigorous environmental monitoring".

She said: "The River Sprint is proving to support a healthy wildlife community.

"The excellent water quality is crucial for the survival of the river jelly lichen and other vulnerable species.

"Going forward, this important finding will help to inspire our future strategies as we work towards sustaining the delicate balance of our local ecosystems."

River jelly lichen is classed as a priority species under the UK Biodiversity Action Plan.

It has already been declared extinct in several other countries, the Environment Agency added.