Ecological Risk Screening Summary - New Zealand Mudsnail (Potamopyrgus antipodarum) - High Risk

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Ecological-Risk-Screening-Summary-New-Zealand-Mudsnail

Species that are considered high risk have a well-documented history of invasiveness in at least one location globally, and a high or medium climate match to the contiguous United States.

P. antipodarum, native to New Zealand, has been introduced to Europe, Asia, North America, and Australia. Its small size, ability to withstand dessication and temperature variation, and parthenogenic reproduction facilitate its accidental introduction and establishment in new locations. The species can be found living in extremely high densities (tens of thousands per square meter) in some locations. Negative impacts have been documented on native macroinvertebrates, mollusks, and fish. Its impacts have been likened to those of the zebra mussel (Dreissena polymorpha). Climate match with the contiguous US is high. Overall risk for this species is high.

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The Fish and Aquatic Conservation program leads aquatic conservation efforts for the U.S. Fish and Wildlife Service. We are committed to tackling the nation’s highest priority aquatic conservation and recreational challenges to conserve, restore, and enhance fisheries for future generations.
Aquatic invasive species cause tremendous harm to our environment, our economy, and our health. They can drive out and eat native plants and wildlife, spread diseases, and damage infrastructure. We work to protect our waterways and the communities that depend on them from the threat of invasive...
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