Fragmentation-Dams Arctic Grayling
jclabarcena
View all records in the stressor response library
Species Common Name
Artic Grayling
Latin Name (Genus species)
Thymallus arcticus
Stressor Name
Fragmentation-Dams
Specific Stressor Metric
Reservoir Distance to Nearest Core Area
Vital Rate (Process)
Capacity
Life Stage
Activity
Migration
Geography
Upper Peace Basin
Detailed SR Function Description
The S-R curve for isolation by the reservoir reflects considerable uncertainty about how flooding affects demographic connections among remnant metapopulations and about the importance of demographic exchange to system capacity. Asymptotic maximum 50% impact on surviving metapopulations, which assumes asymmetric gene flow downstream from locally adapted subpopulations continues to promote resilience.
Function Derivation
Expert opinion
Transferability of Function
It is not considered a factor that should be targeted with current recovery actions, but may be included in future analyses (e.g., of dam footprint impacts), or as mitigation techniques are identified and approved.
Source of stressor Data
Distance from reservoir to population core area
Stressor Magnitude Data
Expert input
PoE Chain
isolation by reservoir
Function Type
continuous
Stressor Scale
linear
References Cited
Hagen, J., Stamford, M., Bottoms, J., & O’Connor, B. (2026). The past and future of Arctic Grayling in the Upper Peace Basin: A synthesis of long-term learning for recovery planning. Prepared for the Fish and Wildlife Compensation Program – Peace. B.C. Data Catalogue / ACAT Report 65150.
Stressor Response csv data
demo_sr_3.csv
(238 bytes)
| Reservoir Distance to Nearest Core Area | % System Capacity | SD | low.limit | up.limit |
|---|---|---|---|---|
| 0 | 100 | 0 | 0 | 100 |
| 25 | 70 | 0 | 0 | 100 |
| 50 | 63 | 0 | 0 | 100 |
| 100 | 50 | 0 | 0 | 100 |
| 150 | 50 | 0 | 0 | 100 |
| 200 | 50 | 0 | 0 | 100 |
| 250 | 50 | 0 | 0 | 100 |
| 300 | 50 | 0 | 0 | 100 |
| 350 | 50 | 0 | 0 | 100 |
| 400 | 50 | 0 | 0 | 100 |
Stressor Response Chart
Mean Response
±1 Standard Deviation
Upper/Lower Limits