| Impact ID | 2252 |
| Impact Type | Predation/Herbivory |
| Study Type | Anecdotal |
| Study Location | Field |
| Impact Description | Neck (1984) suggested that the San Marcos River introduction of giant rams-horn snail could impact native wild rice (Zizania texana) populations |
| Reference | 23818 |
| Great Lakes Region | No |
| Cost | |
| Location | |
