Impervious Area and Coho Salmon Prespawn Survivorship
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Species Common Name
Coho Salmon
Latin Name (Genus species)
Oncorhynchus kisutch
Stressor Name
Area
Specific Stressor Metric
Impervious Area
Stressor Units
%
Vital Rate (Process)
survivorship
Life Stage
Detailed SR Function Description
The graph shows Coho salmon prespawn survivorship in each year at each site from Table 1 in Feist et al. 2011 plotted against percent impervious area. Blue line indicates the model function for prespawn survivorship.
Prespawn mortality in coho salmon is correlated with a number of metrics indicating level of development (e.g., road density, percent impervious area) (Feist et al. 2011, 2017). The most straightforward function appears to be a linear relationship between prespawn mortality and percent impervious area (Figure 2a in Feist et al. 2011).
We plotted the pre-spawn survival in individual years for each site. The data are fitted well with a function of:
Percent impervious area ≤66.67%: Prespawn mortality = (0.015) × (% imp. area)
Percent impervious area >66.67%: Prespawn mortality = 1.0.
Prespawn mortality in coho salmon is correlated with a number of metrics indicating level of development (e.g., road density, percent impervious area) (Feist et al. 2011, 2017). The most straightforward function appears to be a linear relationship between prespawn mortality and percent impervious area (Figure 2a in Feist et al. 2011).
We plotted the pre-spawn survival in individual years for each site. The data are fitted well with a function of:
Percent impervious area ≤66.67%: Prespawn mortality = (0.015) × (% imp. area)
Percent impervious area >66.67%: Prespawn mortality = 1.0.
Function Derivation
expert opinion
Function Type
continuous
Stressor Scale
linear
Citation(s)
Beechie, T. J., C. Nicol, C. Fogel, J. Jorgensen, J. Thompson, G. Seixas, J. Chamberlin, J. Hall, B. Timpane-Padgham, P. Kiffney, S. Kubo, and J. Keaton. 2021. Modeling Effects of Habitat Change and Restoration Alternatives on Salmon in the Chehalis River Basin Using a Salmonid Life-Cycle Model. U.S. Department of Commerce, NOAA Contract Report NMFS-NWFSC-CR-2021-01.
Feist, B. E., E. R. Buhle, P. Arnold. J. W. Davis, and N. L. Scholz. 2011. Landscape ecotoxicology of coho salmon spawner mortality in urban streams. PLoS ONE 6(8):e23424, doi:10.1371/journal.pone.0023424
Feist, B. E., E. R. Buhle, P. Arnold. J. W. Davis, and N. L. Scholz. 2011. Landscape ecotoxicology of coho salmon spawner mortality in urban streams. PLoS ONE 6(8):e23424, doi:10.1371/journal.pone.0023424
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Stressor Response csv data
sr_curve (15)_0.csv
(98 bytes)
| Stressor (X) | Mean System Capacity (%) | SD | low.limit | up.limit |
|---|---|---|---|---|
| 0 | 1 | 0 | 0 | 0 |
| 66.67 | 1 | 0 | 0 | 0 |
| 100 | 0 | 0 | 0 | 0 |
Stressor Response Chart