2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/27/2021 | 2:00 PM - 3:30 PM | CONDITIONS PROMOTING INVASION SUCCESS OF THE NEW ZEALAND MUDSNAIL, POTAMOPYRGUS ANTIPODARUM | Virtual Platform
CONDITIONS PROMOTING INVASION SUCCESS OF THE NEW ZEALAND MUDSNAIL, POTAMOPYRGUS ANTIPODARUM
Non-native species that become invasive can reach exceptionally high densities in their introduced range, threatening both biodiversity and ecosystem function. The non-native species, Potamopyrgus antipodarum, the New Zealand mudsnail, can achieve very high densities, suppress abundance of native species, and alter nutrient cycling in introduced aquatic ecosystems. From five studies, we summarize factors mediating the success of the genotype that occurs in the western U.S. We found support for the enemy release hypothesis in surveys across the western U.S.: snails are largely released from infection by trematode parasites, which often castrate their hosts. Also, by increasing conductivity and concentrations of multiple ions, geothermal activity promotes high densities of Potamopyrgus in the Greater Yellowstone Ecosystem. Results from field surveys are corroborated by lab studies showing survival and growth of Potamopyrgus increases with conductivity. Once high densities are achieved, experiments suggest that Potamopyrgus maintains relatively high growth rates and are more likely to feed relative to low density. These results reveal a mosaic of traits and environmental conditions favoring the invasive snail and reveal characteristics that make aquatic habitats susceptible to future invasion.
- Conductivity
- Habitat
- Salinity
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Presenters/Authors
Michele Larson
(), University of Wyoming, mlarso22@uwyo.edu;
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Brenda Hansen
(), University of North Carolina, bkhansen@email.unc.edu;
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Heather Thon
(), NA, mrsthon@gmail.com;
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Amy Krist
(), University of Wyoming, krist@uwyo.edu;
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