| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
5044
|
Hydrocharis morsus-ranae
|
Competition
|
Anecdotal
|
N/A
|
dense mats may decrease native species diversity
|
Michigan
|
37623
|
|
5116
|
Hydrocharis morsus-ranae
|
Competition
|
Anecdotal
|
N/A
|
potential to reduce plant diversity and alter ecological function in coastal wetlands
|
Michigan
|
37720
|
|
5708
|
Hydrocharis morsus-ranae
|
Competition
|
Anecdotal
|
N/A
|
Hydrocharis morsus-ranae can form dense floating mats of vegetation that can choke out native plants.
|
|
16163
|
|
8016
|
Hydrocharis morsus-ranae
|
Competition
|
Anecdotal
|
N/A
|
Common frogbit (Hydrocharis morsus-ranae) is also capable of aggressive growth: one hibernaculum (starting material for a new plant) can grow to cover an area one diameter in diameter in a single season.
|
|
35249
|
|
8017
|
Hydrocharis morsus-ranae
|
Competition
|
Anecdotal
|
N/A
|
The free-floating form of common frogbit (Hydrocharis morsus-ranae) can lead to densely tangled floating mats, which can crowd and shade out native aquatic vegetation.
|
|
35245
|
|
8018
|
Hydrocharis morsus-ranae
|
Competition
|
Anecdotal
|
N/A
|
Populations of common frogbit (Hydrocharis morsus-ranae) can also compete for nutrients and gases, further reducing the growth of nearby vegetation.
|
|
35254
|
|
8019
|
Hydrocharis morsus-ranae
|
Competition
|
Observational
|
Field
|
There was a 95% decline in submerged vegetation species below mats of common frogbit (Hydrocharis morsus-ranae).
|
|
35244
|
|
8020
|
Hydrocharis morsus-ranae
|
Competition
|
Observational
|
Field
|
There are discrepancies regarding the extent of common frogbit (Hydrocharis morsus-ranae) in the Great Lakes. This species rarely becomes dominant in lakes' wetlands.
|
Great Lakes, USA
|
18821
|
|
8021
|
Hydrocharis morsus-ranae
|
Competition
|
Anecdotal
|
N/A
|
There have also been reports that common frogbit (Hydrocharis morsus-ranae) populations have been aggressively growing in large areas of shallow, open waters in Michigan.
|
Michigan, USA
|
31186
|