Stoloniferous pussytoes (Antennaria flagellaris) COSEWIC assessment and status report: chapter 11
Technical Summary
Antennaria flagellaris
stoloniferous pussytoes – antennaire stolonifère
Extent and Area Information
Population Information
2) 400-500;
3) 1,400,000 +/- 100,000
Threats (actual or imminent threats to populations or habitats)
- off-road vehicle use
- weed control activities on power line just north of site
- potential change in water table level with increasing population base and potential coalbed methane production
Rescue Effect (immigration from an outside source)
Quantitative Analysis
Not Applicable
Other Status
Status and Reasons for Designation
Status: Endangered
Alpha-numeric code: B1ab(ii,iii,v)+2ab(ii,iii,v)
Reasons for Designation: A short-lived perennial plant present at only three geographically restricted localities occupying very small areas of specialized habitat of ephemerally moist seepage sites on private lands. It is at greatest risk from ATV use that currently is evident in close proximity to the populations.It may also be impacted by changes in ground water hydrology and surface impacts from increased development activities in the area such as the proposed production of coalbed methane.
Applicability of Criteria
Criterion A (Declining Total Population): Not applicable: No declines documented
Criterion B (Small Distribution, and Decline or Fluctuation): Endangered under B1 and B2 (a and b, ii, iii, v) due to the small distribution with an extent of occurrence of <5 km² and small area of occupancy of << 1 km² (0.22 ha) and only known from 3 localities; threats of loss of area of occupancy, change in quality of habitat and reduction in number of individuals from ATV use are very real and of imminent occurrence; impacts from chemical weed control of nearby hydro right-of-way are a potential threat, as is the change in water table due to increased housing development.
Criterion C (Small Total Population Size and Decline): Not applicable: Large population and no declines documented.
Criterion D (Very Small Population or Restricted Distribution):Threatened under D2 with a small area of occupancy (<20 km² ) and < 5 locations.
Criterion E (Quantitative Analysis): Not applicable.
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