Appendix S1. Values, sensitivity ranges, and literature sources for all parameters (excluding environmental input variables) in our
mechanistic model.
Model Parameter
Symbol
Unit
Used
Value
Range*
Sources
McIntire (1973); Uehlinger, Bührer &
Reichert (1996); Rutherford, Scarsbrook
& Broekhuizen (2000); Boulêtreau et al.
(2006); Fovet et al. (2010); Schuwirth,
Acuña & Reichert (2011)
McIntire (1973); Rutherford et al.
(2000); Boulêtreau et al. (2006);
Schuwirth et al. (2011)
Chapra (1997); Abdul-Aziz, Wilson &
Gulliver (2010)
Periphyton growth and mortality
Maximum periphyton
growth rate
gmax
d-1
1.1
0.5 - 5.5
Periphyton biomass at
half saturation
kb
g AFDM
6
1 - 30
Temperature coefficient
θ
--
1.066
1.053 - 1.080
PAR at half saturation
kpar
mol m-2 d-1
5
1-9
N at half saturation
kn
mg L-1
0.02
0.01 - 0.07
Jorgensen, Nielsen & Jorgensen (1991);
Chapra (1997); Rutherford et al. (2000)
P at half saturation
kp
mg L-1
0.005
0.001 - 0.010
Jorgensen et al. (1991); Chapra (1997);
Rutherford et al. (2000)
Respiration rate at 20 oC
rref
o
C
0.035
0.02 - 0.05
Hamilton & Schladow (1997);
Rutherford et al. (2000)
Respiration coefficient
θ2
--
1.08
1.05 – 1.11
Chapra (1997); Abdul-Aziz et al. (2010)
Detachment coefficient
cdet
--
0.019
0.003 - 0.035
Biomass of periphyton
resistant to detachment
B0
g AFDM
0.001
--
Physical habitat
Uehlinger et al. (1996); Hill, Fanta &
Roberts (2009)
Labiod, Godillot & Caussade (2007);
Fovet et al. (2010)
Uehlinger et al. (1996); Boulêtreau et al.
2006; Abdul-Aziz et al. (2010)
Water density
ρw
kg m-3
1000
--
Substratum density
ρs
kg m-3
2.65
--
Henderson (1966)
Shields number
τ*
--
0.045
--
Henderson (1966)
Dissolved N from live
salmon
Nexcret
mg g-1 d-1
0.161
0.092 - 0.593
Wood (1995); Post & Walters (2009)
Dissolved P from live
salmon
SRPexcret
mg g-1 d-1
0.032
0.018 - 0.052
Wood (1995); Post & Walters (2009)
Nleach
mg g-1 d-1
0.016
0.009 - 0.059
Assumed value (1/10th of excretion
value)
SRPleach
mg g-1 d-1
0.003
0.002 - 0.005
Assumed value (1/10th of excretion
value)
Temperature dependent
decay rate
rdecay
d-1
1
0.8 - 1.2
Redd area (m2)
Aredd
m2
4.5
--
Salmon
Dissolved N from
salmon carcass
Dissolved P from salmon
carcass
Chidami & Amyot (2008)
Healey (1991)
*represents the range (minimum to maximum) of values used in the global sensitivity analysis (GSA)
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