| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
8757
|
Najas marina
|
Competition
|
Anecdotal
|
N/A
|
Spiny naiad (Najas marina) is found throughout the Great Lakes and is considered to be a nuisance threat to the ecosystem.
|
Great Lakes, USA
|
18779
|
|
8758
|
Najas marina
|
Competition
|
Observational
|
Field
|
In the 1940s, spiny naiad (Najas marina) was replacing other plant species in Michigan lakes.
|
Michigan, USA
|
10368
|
|
8759
|
Najas marina
|
Competition
|
Observational
|
Field
|
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.
|
Rift Valley, Merkaz Sappir, Israel
|
17957
|