| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
8048
|
Iris pseudacorus
|
Competition
|
Anecdotal
|
N/A
|
Yellow iris (Iris pseudacorus) is tolerant of a range of water conditions, such as salinity, poor water quality, and drought. This tolerance enables it to be a good competitor in a variety of wetland ecosystems.
|
|
25587
|
|
8049
|
Iris pseudacorus
|
Competition
|
Anecdotal
|
N/A
|
The clonal nature of Yellow iris (Iris pseudacorus) causes it to form dense stands and thick, submerged rhizome mats.
|
|
25598
|
|
8050
|
Iris pseudacorus
|
Competition
|
Anecdotal
|
N/A
|
Yellow iris (Iris pseudacorus) can prevent the germination and growth of native species such as sedges, rushes, etc., and eventually displace them entirely.
|
|
25601
|
|
8051
|
Iris pseudacorus
|
Competition
|
Observational
|
Field
|
Yellow iris (Iris pseudacorus) can also outcompete neighboring plants for pollinators.
|
Summit County, Ohio
|
25521
|
|
8052
|
Iris pseudacorus
|
Competition
|
Anecdotal
|
N/A
|
Yellow iris (Iris pseudacorus) may be a competitive threat to native irises, including I. brevicaulis (listed as threatened in Ohio), I. cristata, I. lacustris (endemic to the Great Lakes), I. robusta [versicolor x virginica] (endemic to the Great Lakes), I. setosa, I. verna (listed as threatened in Ohio), I. versicolor, I. virginica, and I. virginica var. shrives.
|
Great Lakes, USA
|
25196
|
|
8053
|
Iris pseudacorus
|
Competition
|
Anecdotal
|
N/A
|
In wetland ecosystems in the eastern United States, Iris pseudacorus (yellow iris) has reduced the density of native sedges and rushes that serve as habitat for other species, especially waterfowl.
|
eastern North America
|
25528
|
|
8054
|
Iris pseudacorus
|
Competition
|
Anecdotal
|
N/A
|
In Connecticut, Iris pseudacorus (yellow iris) successfully excluded native Peltandra virginica (arrow-arum), which is an important food source for nesting wood ducks.
|
Connecticut, USA
|
25596
|
|
8055
|
Iris pseudacorus
|
Competition
|
Anecdotal
|
N/A
|
By 1970, Iris pseudacorus (yellow iris) was found growing to the complete exclusion of Typha and other native marsh plants along the Merced River in California.
|
western North America
|
10753
|
|
8056
|
Iris pseudacorus
|
Competition
|
Anecdotal
|
N/A
|
Iris pseudacorus (yellow iris) expanded along 1300 miles of irrigation canals and laterals near Flathead Lake in northwestern Montana.
|
Flathead Lake, Montana, USA
|
24520
|
|
8057
|
Iris pseudacorus
|
Competition
|
Experimental
|
Laboratory
|
(yellow iris) has a high anoxia tolerance. During the growing season, it can survive at least 28 days of darkness and anoxia; this period is increased to 60 days for overwintering plants.
|
|
25588
|
|
8058
|
Iris pseudacorus
|
Competition
|
Experimental
|
Laboratory
|
When exposed to prolonged periods of anoxia, Iris pseudacorus (yellow iris) increased production of superoxide dismutase enzymes that help the plant cope with oxidative stress (drought, nutrient deficiencies, injury, etc.). The ability to cope with and recover from stress faster than neighboring plants may enable it to be a better competitor.
|
|
25534
|