| Impact ID | 5646 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Crassula helmsii suppresses germination of other species up to 83%, yet there was no effect on seed back and no loss of plant species on four ponds in England. However, the experiment was over a limited time scale. |
| Reference | 29482 |
| Great Lakes Region | No |
| Cost | |
| Location | England |
