| Impact ID | 6364 |
| Impact Type | Habitat Alteration |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Rudd (Scardinius erythrophthalmus) likely contributed to the shift in Hamilton Lake, New Zealand from a macrophyte to phytoplankton community; its main source of food, the macrophyte Egeria, collapsed over time as secchi depth decreased |
| Reference | 24362 |
| Cost | |
| Location | Hamilton Lake, New Zealand, USA |