| Impact ID | 7076 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In contrast to the competitive ability of Hygrophila polysperma observed in the southeastern United States, scientists in New Zealand found H. polysperma to be a poor competitor when grown with New Zealand native macrophytes, Egeria densa or Lagarosiphon major (native to South America and southern Africa, respectively). |
| Reference | 42130 |
| Cost | |
| Location | New Zealand |