Grand coulee owl-clover (Orthocarpus barbatus) COSEWIC assessment and status report: chapter 13
Technical summary
Grand Coulee Owl-clover
Orthocarpe barbu
Range of Occurrence in Canada: British Columbia
Extent and area information
[area encompassing all known localities]
[actual area occupied by populations]
(0.004 km 2 )
Population information
“Veronica Lake”: 367
Mt. Kruger, above track:
3222-3722
KilpoolaLake area:
5485-8485
Threats (actual or imminent threats to populations or habitats)
- alien species invasion, urban and agricultural development
Rescue effect (immigration from an outside source)
Quantitative analysis
[provide details on calculation, source(s) of data, models, etc.]
N/A
Current status
Committee on the Status of Endangered Wildlife in Canada (COSEWIC): Endangered (May 2005)
Status and reasons for designation
Reasons for Designation: A semiparasitic annual restricted to a small area east of the Cascade Mountains. The few small populations are subject to extreme fluctuations in numbers of mature plants and at continued risk from introduced weeds, overgrazing and housing developments. One population in South Okanagan Grasslands Protected Area is protected from development.
Applicability of criteria
Criterion A (Declining Total Population): Not applicable.
Criterion B (Small Distribution, and Decline or Fluctuation): Meets endangered (B1ab(ii,iii,iv,v)c(iv) + 2ab (ii,iii,iv,v)c(iv) based on extent of occurrence < 5000 km2 and area of occupancy <500 km2 with only 4 populations and continuing decline projected in area of occupancy, extent and quality of habitat, possible loss of entire populations, and number of individuals (due to spread of exotics and expansion of development on private lands); it is also subject to extreme fluctuations in number of mature individuals.
Criterion C (Small Total Population Size and Decline): Meets threatened C2b with <10 000 plants subject to continued decline in numbers and extreme fluctuations in number of mature individuals.
Criterion D (Very Small Population or Restricted Distribution): Meets threatened D2 based on an area of occupancy <<20 km2 and only 4 populations at risk from habitat loss due to continued spread of exotic plants and potential expansion of development activities on private lands in close proximity to existing populations.
Criterion E (Quantitative Analysis): Not applicable.
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