Streambank lupine (Lupinus rivularis) COSEWIC assessment and status report: chapter 11
Technical Summary
Lupinus rivularis Dougl. Ex. Lindl.
Riverbank lupine – lupin des ruisseux
Occurrence in Canada:
Southwestern BC
Extent and Area information
Extent of occurrence (EO) (km²):
70
Specify trend (decline, stable, increasing, unknown):
Unknown (Stable)
Are there extreme fluctuations in EO (> 1 order of magnitude)?
Unknown
Area of occupancy (AO) (km²):
0.5
Specify trend (decline, stable, increasing, unknown):
Unknown (Stable)
Are there extreme fluctuations in AO (> 1 order magnitude)?
Unknown
Number of extant locations:
6
Specify trend in # locations (decline, stable, increasing, unknown):
Unknown
Are there extreme fluctuations in # locations (>1 order of magnitude)?
Unknown
Habitat trend: specify declining, stable, increasing or unknown trend in area, extent or quality of habitat:
Declining
Population information
Generation time (average age of parents in the population) (indicate years, months, days, etc.):
2 Years (?)
Number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values):
248
Total population trend: specify declining, stable, increasing or unknown trend in number of mature individuals:
Unknown (Stable?)
Are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)?
Unknown
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)?
Yes
| # | Location | Subpopulation | Mature Individuals |
|---|---|---|---|
| 1 | Sooke | -- |
1
|
| 2 | Delta River Road | -- |
45
|
| 3 | Delta / Surrey Border | -- |
50
|
| 4 | Surrey (Fraser Surrey Docks) | a) railway bed #1 |
1
|
| 4 | Surrey Fraser Surrey Docks) | b) railway bed #2 |
11
|
| 4 | Surrey (Fraser Surrey Docks) | c) roadside |
20
|
| 5 | Port Coquitlam (Pitt River Dyke) | -- |
20
|
| 6 | Port Coquitlam (Coquitlam River) | -- |
100
|
Specify trend in number of populations (decline, stable, increasing, unknown):
Unknown (Stable?)
Are there extreme fluctuations in number of populations (>1 order of magnitude)?
Unknown
Threats (actual or imminent threats to populations or habitats)
- All populations: Genetic swamping by Lupinus arboreusgenes.
- All populations: Predation by invasive invertebrates (European Furrowed slugs).
- Populations 2, 3, 4, 5 & 6: Site management, including spraying of herbicides (observed at population 2 in 2001), mowing and other landscaping activities.
- Population 3 & 4a & b: Storage of industrial supplies from adjacent properties.
- Population 4c: Construction activities related to adjacent property development.
- Populations 5 & 6: Wildflower picking.
Rescue Effect (immigration from an outside source):
Low
Does species exist elsewhere (in Canada or outside)?
Yes
Status of the outside population(s)?
Not listed
is immigration known or possible?
Possible
Would immigrants be adapted to survive here?
Yes
Is there sufficient habitat for immigrants here?
Yes
Quantitative Analysis
Not applicable (No information available)
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