| Impact ID | 4675 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Japanese knotweed, Fallopia japonica, is a successful competitor. The foliage forms dense canopy restricting growth of ground flora and preventing growth and establishment of native species. |
| Reference | 37069 |
| Great Lakes Region | No |
| Cost | |
| Location | UK |
