Climbing prairie rose (Rosa setigera) COSEWIC assessment and status report addendum: chapter 13
Technical summary
Rosa setigera
Climbing prairie rose
Climbing prairie rose
Rosier sétigère
Range of Occurrence in Canada: southwestern Ontario, Essex and adjacent counties.
Extent and area information
Extent of occurrence (EO) (km 2 ).
<2000 km 2
Specify trend (decline, stable, increasing, unknown).
Stable
Are there extreme fluctuations in EO (> 1 order of magnitude)?
No
Area of occupancy (AO) (km 2 ).
15 km 2
Specify trend (decline, stable, increasing, unknown).
Decline, about 38%
Are there extreme fluctuations in AO (> 1 order of magnitude)?
No
Number of extant locations.
19 confirmed, another 19 sightings 1980-92
Specify trend in # locations (decline, stable, increasing, unknown).
Decline: 5 sites lost, 10 not found, 6 in decline, 7 stable, 4 new.
Are there extreme fluctuations in # locations (>1 order of magnitude)?
No
Habitat trend: specify declining, stable, increasing or unknown trend in area, extent or quality of habitat.
Declining; habitat being developed or degraded.
Population information
Generation time (average age of parents in the population) (indicate years, months, days, etc.).
3 years to flowering in cultivation (likely longer in the wild).
Number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values).
145 estimated from 2001 inventory + sightings since 1980.
Total population trend: specify declining, stable, increasing or unknown trend in number of mature individuals.
Slow decline over past 18 years.
If decline, % decline over the last/next 10 years or 3 generations, whichever is greater (18 year comparison).
21% decline
Are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)?
No
Is the total population severely fragmented (most individuals found within small and relatively isolated (geographically or otherwise) populations between which there is little exchange, i.e., ≤ 1 successful migrant / year)?
Total s. Ontario population mostly in clusters: Pelee Is., Windsor, Wheatley, Tilbury, Walpole Is.
List each population and the number of mature individuals in each.
3. Arner
1
19. Malden
0
24. Hillman Marsh
3
27-31 Pelee Is.
13
36-7. Comber
3
39. Rowsoms C.A.
ca. 12
41-43. Windsor
ca. 14
45-6. Whitebread/Pr. Siding
1
50. Wheatley Prov. Pk.
7
52. Walpole Is.
2
53. Mosa Tp.
8
19 records not surveyed
ca. 81
total:
145
Specify trend in number of populations (decline, stable, increasing, unknown).
5 lost, 10 not found, 6 in decline, 7 stable, 4 new
Are there extreme fluctuations in number of populations (>1 order of magnitude)?
No
Threats (actual or imminent threats to populations or habitats)
- land being developed, especially in Windsor area
- successional development of open habitats
- inappropriate management of conservation areas and roadsides
- unrestricted recreational use of all terrain vehicles (ATVs)
- invasive exotic shrubs a potential problem
Rescue effect (immigration from an outside source)
Does species exist elsewhere (in Canada or outside)?
Canada: no. USA, yes.
Status of the outside population(s)?
Globally secure (G5); but S1-S2 in 2 states, S3 in 2 states; nowhere S4 or S5
Is immigration known or possible?
Not known but possible through fruit dispersal.
Would immigrants be adapted to survive here?
Likely if from northern source.
Is there sufficient habitat for immigrants here?
Yes, but problem is loss or degradation of habitat.
Quantitative Analysis
5 populations lost, 10 not found, 6 in decline, 7 stable, 4 new.
Comparative counts from survey populations:
1984: 116 + 20 juveniles, 2000-2001: 64 + 44 juveniles.
Total current estimated population of all records: 145 reproductively mature and juveniles.
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