| Impact ID | 8003 |
| Impact Type | Habitat Alteration |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Dense populations of Glyceria maxima (reed manna grass) create rhizomal mats that can trap sediment faster than native species. This increased sedimentation can alter the flow of water, restrict or even clog small waterways and drainages, and cause flooding. |
| Reference | 25475 |
| Cost | |
| Location | |