Sensitivity to climate change
There is limited information on the sensitivity of the ashy pebblesnail to climate change. This species displays very similar traits and habitat requirements to the Olympia pebblesnail.
The ashy pebblesnail’s habitat range is believed to be restricted to the Columbia River Basin’s rivers, streams, and creeks, although its historic range encompassed Washington, Oregon, and Idaho. The ashy pebblesnail requires clear, cold, highly oxygenated streams, and therefore may be sensitive to changes in flow regimes and increases in water temperature that negatively impact dissolved oxygen levels and chemical and biological processes. Changes in flow regimes that increase nutrient runoff may cause dense algae blooms that impair or prevent the ashy pebblesnail’s access to important food resources (e.g., lithophytes).
The invasive New Zealand mudsnail (Potamopyrgus antipodarum) may be a direct competitor for food and habitat.
Exposure to climate change
- Altered flow regimes
- Reduced oxygen
- Increased water temperatures