| Impact ID | 6988 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Egeria densa may have the potential to compete with native species. In the Hawkesbury-Negean River, increased spread of E. densa resulted in the displacement and reduced abundance of the native vallisneria Vallisneria americana. It is suspected that competition for light is responsible for the decline in vallisneria, and that floods are responsible for the rapid spread of E. densa. |
| Reference | 42093 |
| Cost | |
| Location | Hawkesbury-Nepean River, Australia |