Invasive, Non-Native Species

The current status of individual invasive species in Lincolnshire is not well understood, as species are generally only recorded on a site specific basis. As a part of our environmental obligations, we record the presence of invasive species within our drains, and report this annualy to the GLNP in an effort to improve understanding.

Witham First District IDB don’t currently have any invasive species in their watercourses, however species with a known potential to cause problems include Japanese Knotweed and Himalayan Balsam. The main issue with these species from an operational perspective is the disruption to routine maintenance in terms of restriction of access to banks. From a conservation perspective, invasive species can cause a reduction in diversity and habitat quality, as they often out-compete native flora. Japanese Knotweed in particular spreads very easily-particularly in ripeain areas where high water flows can disperse fragments of the plant downstream, where new colonies can form. It is therefore very difficult and expensive to control and eradicate. Further problems occur during the winter months when the species isn’t present, as it leaves areas of exposed ground, therefore increasing the risk of erosion.

For more information about invasive species in the UK, please click on the link below:

GB Non-Native Species Secretariat

For more information about invasive species in Lincolnshire, please see page 233 of the Lincolnshire BAP listed below:

Lincolnshire BAP

To download the Greater Lincolnshire Nature Partnership’s invasive species identification guides, please click here