Knotweed Webinar

March 26, 2021 - 7:00 AM
Pacific Northwest Invasive Plant Council, Society for Ecological Restoration

Knotweed on a stream bank.\Photo courtesy of King County, Wash.

Knotweed is an invasive species that can do great damage to riparian systems.  The Pacific Northwest Invasive Plant Council is the local sponsor of a presentation by the Society for Ecological Restoration on knotweed and how to address the problems it creates.  The webinar takes place on Friday, March 26, at 7 a.m. here (10 a.m. Eastern Daylight Time).

The presenter is Brian Colleran is a Certified Ecological Restoration Practitioner (CERP) and Professional Wetland Scientist (PWS), with a Master’s degree in Natural Resource Management.

Once established, knotweed can displace riparian plants, meaning that soil stability once provided by displaced roots is lost, carrying significant knock-on implications for watershed management. There is also a climate-change angle:  As some hydrological regimes shift towards more frequent and severe storm events in response to climate change, positive feedback loops may develop in these regions between existing knotweed populations, sudden riverbank failure, and increased flood-related damage, with presumably significant impacts on riparian infrastructure. While the continued spread of this invasive could have significant riparian flood resiliency consequences if left unchecked, mindful action to control these plants, such as will be discussed in this presentation, is likely to be beneficial financially, socially, and ecologically within any invaded watershed. 

To register for this webinar, go here.