Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
2034
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
The dense colonization of Potamopyrgus antipodarum in streams has been linked to the decline in native macroinvertebrate densities.
|
|
17665
|
2039
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
Potamopyrgus antipodarum in the Snake River Basin (Idaho, USA) were found in high densities and outnumbered the native snails in three different habitats.
|
|
13759
|
2040
|
Potamopyrgus antipodarum
|
Competition
|
Anecdotal
|
Field
|
Potamopyrgus antipodarum in the Snake River Basin (Idaho, USA) were found in high densities and outnumbered native snails in three different habitats, possibly out competing the native threatened Hydrobiid T. serpenticola.
|
|
13759
|
2042
|
Potamopyrgus antipodarum
|
Competition
|
Anecdotal
|
Field
|
Researchers noticed a negative/inverse relationship with the presence of Potamopyrgus antipodarum and that of native Hydrobiid snails.
|
|
9400
|
2043
|
Potamopyrgus antipodarum
|
Competition
|
Experimental
|
Field
|
Taylorconcha serpenticola, a U.S. native, federally threatened snail, decreased in density in habitats that had high densities of Potamopyrgus antipodarum.
|
|
24682
|
2044
|
Potamopyrgus antipodarum
|
Competition
|
Experimental
|
Field
|
Potamopyrgus antipodarum in high enough densities impeded the growth rate of the U.S. native, federally threatened snail, Taylorconcha serpenticola.
|
|
24682
|
2046
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
Where Potamopyrgus antipodarum occurred in high densities, there was a decrease in gastropod diversity.
|
|
33534
|
2047
|
Potamopyrgus antipodarum
|
Competition
|
Experimental
|
Field
|
Potamopyrgus antipodarum has become the most common snail present in areas of the Snake River, and the dominant gastropod species in many habitat types.
|
|
9286
|
2053
|
Potamopyrgus antipodarum
|
Competition
|
Experimental
|
Laboratory
|
Potamopyrgus antipodarum limits the growth rate and absolute growth of the endangered desert valvata snail, Valvata utahensis, both of which occur in the Snake River.
|
|
33550
|
2054
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
In the Mont Saint-Michel Bay system of France, Potamopyrgus antipodarum altered the gastropod richness, making up over 80% of gastropods.
|
|
15798
|
2058
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
Potamopyrgus antipodarum limited the growth of Pyrgulopsis robusta and became dominant in many habitats. Interestingly, analysis indicated that both species consumed similar amounts of algal resources, discrediting resource acquisition ability as a mechanism for interspecific competition. The authors suggest that adverse impacts on P. robusta could stem from lower maintenance costs or more efficient resource conversion within P. antipodarum.
|
Yellowstone National Park, USA
|
24683
|
7371
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
In human-created lentic habitats in Poland, Potamopyrgus antipodarum invaded waters had lower native gastropod density than uninvaded waters.
|
Poland
|
42289
|
7372
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
Potamopyrgus antipodarum can monopolize the benthic substrate, thereby interfering with the space that is required by some macroinvertebrates to feed.
|
|
42289
|
7373
|
Potamopyrgus antipodarum
|
Competition
|
Anecdotal
|
N/A
|
The dietary requirements of Potamopyrgus antipodarum suggest that it can probably compete with native snails because P. antipodarum is primarily a grazer on benthic periphyton and detritus.
|
|
42289
|
7374
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
In human-created lentic habitats in Poland, Potamopyrgus antipodarum invaded waters had lower native gastropod diversity than uninvaded waters.
|
Poland
|
42289
|
7729
|
Potamopyrgus antipodarum
|
Competition
|
Anecdotal
|
N/A
|
Potamopyrgus antipodarum can compete with native fish by consuming up to half of their food including caddisfly larvae, mayfly larvae, and chironomids.
|
|
42479
|
7730
|
Potamopyrgus antipodarum
|
Competition
|
Anecdotal
|
N/A
|
Potamopyrgus antipodarum can consume up to half of food resources in a waterway which can reduce populations of invertebrates such as caddisflies and mayflies.
|
|
42480
|
8302
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
In one Australian stream, increasing densities of New Zealand mudsnail (Potamopyrgus antipodarum) were positively correlated with density and species richness of native invertebrates, possibly due to coprophagy (ingestion of the snail's feces).
|
Australia
|
22919
|
8303
|
Potamopyrgus antipodarum
|
Competition
|
Experimental
|
Field
|
A colonization experiment in Yellowstone National Park found a negative relationship between the abundance of New Zealand mudsnail (Potamopyrgus antipodarum) colonizers and native macroinvertebrate colonizers on stone tiles placed in several rivers, suggesting that P. antipodarum may interfere with the colonization activity of native species. However, across sites, significant negative correlations between the densities of P. antipodarum and native macroinvertebrate densities, and overall impacts in this area remain largely unknown.
|
Yellowstone National Park
|
17665
|
8304
|
Potamopyrgus antipodarum
|
Competition
|
Experimental
|
Laboratory
|
Stable isotope analysis indicated that the diet of the New Zealand mudsnail (Potamopyrgus antipodarum) overlaps with the diets of coexisting native invertebrates in the Columbia River Estuary. However, the authors also found that P. antipodarum foraging was decreased in the presence of native Gnorimosphaeroma insulare, while foraging of G. insulare was unaffected by interspecific competition.
|
Columbia River Estuary
|
24663
|
8305
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
No impact was found on native species biomass following the invasion of New Zealand mudsnail (Potamopyrgus antipodarum) in Glen Canyon of the Colorado River.
|
Glen Canyon, Colorado River
|
24666
|
8306
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
In contrast, field surveys below the Flaming Gorge Dam documented an overall decrease in total invertebrate abundance following the invasion of the New Zealand mudsnail (Potamopyrgus antipodarum). Interestingly, some invertebrate groups that were not affected by P. antipodarum overall were reduced in the presence of P. antipodarum in certain habitats (e.g., amphipods in eddies and mayflies in runs/riffles).
|
Flaming Gorge Dam, Utah
|
19767
|
8307
|
Potamopyrgus antipodarum
|
Competition
|
Experimental
|
Laboratory
|
In an enclosure competition experiment in Branbury Springs, ID, competitive interactions likely have adverse effects on growth rates of a threatened native snail, Taylorconcha serpenticola, at New Zealand mudsnail (Potamopyrgus antipodarum) densities above 4,000 m-2.
|
Ranbury Springs, ID
|
24682
|
9244
|
Potamopyrgus antipodarum
|
Competition
|
Anecdotal
|
N/A
|
Potamopyrgus antipodarum outcompetes and physically crowds native species.
|
|
42717
|
9613
|
Potamopyrgus antipodarum
|
Competition
|
Observational
|
Field
|
Dense colonies of Potamopyrgus antipodarum can outcompete and then displace native snail species and other benthic macroinvertebrates.
|
|
43216
|