Tackling Invasive Species on the Afon Clwyd
Tackling Invasive Species on the Afon Clwyd
We’re pleased to announce the launch of the Clwyd INNS Project, an exciting initiative focused on managing invasive non-native species (INNS) in the upper section of the Afon Clwyd, from Clocaneog Forest to Ruthin. This project is a collaborative effort between North Wales Rivers Trust, North Wales Wildlife Trust, Dŵr Cymru Welsh Water, and other members of the Clwyd Partnership Forum, aimed at protecting the river’s biodiversity and restoring its natural balance.
What Are INNS, and Why Do They Matter?
Invasive non-native species are plants, animals, or microorganisms introduced to an area outside their native range. While not all non-native species cause harm, invasive ones can outcompete native wildlife, disrupt ecosystems, and even damage infrastructure. In rivers like the Afon Clwyd, species such as Himalayan balsam, pose significant threats to local habitats and species.
These invaders spread rapidly, often taking over riverbanks, choking out native plants, and reducing biodiversity. The result? A loss of habitat for fish and wildlife, increased soil erosion, and compromised water quality.
How Is the Clwyd INNS Project Helping?
Our project takes a catchment-wide approach to INNS management, ensuring that efforts are coordinated and effective. We’re using tools like NBN Atlas, Cofnod, and other databases to map the distribution of priority invasive species across the Clwyd catchment. These heat maps will identify hotspots where action is needed most, helping us target resources efficiently.
The data will inform a Spatial Catchment Management Plan, a long-term strategy for addressing INNS.
Did You Know?
Himalayan balsam can produce up to 800 seeds per plant, which are spread far and wide by waterways.
Japanese knotweed can grow through concrete and tarmac, causing costly damage to infrastructure.
Signal crayfish not only outcompete native crayfish but also spread a fungal disease called crayfish plague.
If you’re interested in being involved with this project please email poppy@northwalesriverstrust.org
