| Impact ID | 8759 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | About a third of the spiny naiad (Najas marina) seeds ingested by mallard ducks are viable after passing through the digestive tract. This means that a single duck can carry viable seeds 100-200 km per day. |
| Reference | 17957 |
| Cost | |
| Location | Rift Valley, Merkaz Sappir, Israel |