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Thirteen families of freshwater molluscs, representing both gastropods (snails) and bivalves (mussels and clams), are known to occur in British Columbia. Freshwater molluscs may be at risk due to a variety of reasons including: 1) habitat loss/alteration; 2) restricted niche requirements; 3) confused taxonomy; and 4) a general lack of information on their distribution and ecology. Specifically, these factors may: 1) interfere with the ability of freshwater molluscs to reproduce; 2) impact molluscs directly or indirectly through the introduction of exotic species; and 3) change the amount of habitat that is available to molluscs. We present results for 3 species of snails that were assessed to be at risk in British Columbia. Physella wrighti (hotwater physa) is at risk due to restricted niche requirements, while the assessment of risk for P. hordacea (grain physa) may be in error due to confused taxonomy within the genus...
Lee, Jacqueline S., Ackerman, Josef Daniel. 1999. Freshwater Molluscs at Risk in British Columbia: Three Examples of "Risk" (in Proc. Conference Biology & Management of Species and Habitats at Risk). Ministry of Environment, Lands and Parks. Conference Biology & ManagementProceedings. Vol. 1
Other Identifier: University College of the Cariboo
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