BC Conservation Data Centre: Conservation Status Report
Juncus nevadensis var. inventus
dune rush
| Scientific Name: | Juncus nevadensis var. inventus |
|---|---|
| English Name: | dune rush |
| Provincial Status Summary | |
| Status: | S2S3 |
| Date Status Assigned: | April 30, 2021 |
| Date Last Reviewed: | April 30, 2021 |
| Reasons: | There are currently four known occurrences of Juncus nevadensis var. inventus in British Columbia, all of which are considered extant. The range extent is less than 100 square kilometres and the area of occupancy is 16 square kilometres. No discernible threats have been noted by the observers and their presence in Pacific Rim National Park offers some measure of protection. |
| Range | |
| Range Extent: | A = <100 square km |
| Range Extent Comments: | The range extent for Juncus nevadensis var. inventus, estimated based on suitable habitat between known occurrences, is less than100 square kilometres. This species is currently known from about 8 km of beach in Pacific Rim National Park on both sides of Barkley sound. |
| Area of Occupancy (km2): | CD = 3-25 |
| Area of Occupancy Comments: | The area of occupancy, using a 2km x 2km grid cell for extant occurrences, is 16 square kilometres. |
| Occurrences & Population | |
| Number of Occurrences: | AB = 1 - 20 |
| Comments: | There are currently 4 known occurrences of Juncus nevadensis var. inventus documented in British Columbia, all of which are considered extant. |
| Number of Occurrences with Good Viability / Ecological Integrity: | BC = 1 - 12 |
| Number of Occurrences Appropriately Protected & Managed: | C = 4 - 12 |
| Comments: | All four known locations are within Pacific Rim National Park Reserve. |
| Population Size: | BC = 50 - 1,000 individuals |
| Comments: | Several plants around stagnant pool at one site (and several more below that), frequent and co-dominant along 400 m along creek at another, and small patch in a third site (F. Lomer, pers. comm. 2013). As a rhizomatous species there is some difficulty in estimating the number of individuals. |
| Threats (to population, occurrences, or area affected) | |
| Degree of Threat: | D = Low |
| Trend (in population, range, area occupied, and/or condition of occurrences) | |
| Short-Term Trend: | U = Unknown |
| Long-Term Trend: | U = Unknown |
| Other Factors | |
| Intrinsic Vulnerability: | C=Not intrinsically vulnerable |
| Environmental Specificity: | Rank Factor not assessed |
| Other Rank Considerations: | |
| Information Gaps | |
| Research Needs: | |
| Inventory Needs: | |
| Stewardship | |
| Protection: | |
| Management: | |
| Version | |
| Author: | Penny, J.L. and R. Batten |
| Date: | February 08, 2021 |
| References | |
| No references available | |
Please visit the website Conservation Status Ranks for information on how the CDC determines conservation status ranks. For global conservation status reports and ranks, please visit the NatureServe website http://www.natureserve.org/.
Suggested Citation:
B.C. Conservation Data Centre. 2021. Conservation Status Report: Juncus nevadensis var. inventus. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Jun 5, 2026).