| Impact ID | 5651 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | It was observed that for every 10% increase in Crassula helmsii there was a 6% decrease in the amount of bare ground and 5% decrease in the amount of native vegetation. |
| Reference | 39943 |
| Cost | |
| Location | New Forest, England |