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Competition between the Threatened Bliss Rapids Snail, Taylorconcha serpenticola (Hershler et al.) and the Invasive, Aquatic Snail, Potamopyrgus antipodarum (Gray): Author: Richards, David Charles; Date: 2004-12-15; Program: Biological Sciences; Abstract: Due primarily to habitat loss and invasive species, extinction rates for North American mollusk taxa are among the highest for any taxonomic group in the world. Competition between invasive and native species often leads to decreases in native populations. For example, a primary reason for listing the Bliss Rapids snail, Taylorconcha serpenticola as threatened in the Snake River drainage was the perceived impacts of the highly invasive New Zealand mudsnail, Potamopyrgus antipodarum. Despite federal protection of T. serpenticola and the known presence of P. antipodarum in the Snake River draina...; Download File | View full details