Montane Peaclam – State Wildlife Action Plan

Overview

Species Common Name Montane Peaclam
Species Scientific Name Pisidium ultramontanum

Ecoregions

East Cascades

The East Cascade ecoregion extends from the Cascade Mountains' summit east to the warmer, drier high desert and down the length of the state. This ecoregion varies dramatically from its cool, moist border with the West Cascades ecoregion to its dry eastern border, where it meets sagebrush desert landscapes.

Willamette Valley

The Willamette Valley ecoregion is bounded on the west by the Coast Range and on the east by the Cascade Range. This long mostly level alluvial plain has some scattered areas of low basalt, and contrasts with productive farmland and large urban areas. It has the fastest-growing human population in the state resulting in challenges due to land-use changes.

Special needs

This species is found in spring-fed streams, lakes, and pools with sand-gravel substrates. Adults feed by filter or deposit feeding,

Limiting factors

Threats to this species include lake eutrophication, water diversions that lower the water table and reduce spring flows, and hydroelectric impoundments.

Data gaps

Current distribution, status and trends. Life history. Population genetic health. Habitat requirements and sensitivity to contaminants, sedimentation, and altered flow regimes.

Conservation actions

Protect known populations of the species. Maintain water quality. Monitor status and trends. Limit water abstraction from occupied waterbodies. Employ EARR techniques for aquatic invasive species.

Key reference or plan

Blevins, E., T. Stone, and R. Huff. 2019. Interagency Special Status/Sensitive Species Program (ISSSSP) Species Fact Sheet: Pisidium ultramontanum. USDA Forest Service Region 6 and USDI Bureau of Land Management Oregon State Office. 12 pp. Read here