Supplementary Material
Table S1. Descriptions for 39 river fragments, including the United States Geological Survey
(USGS) gage used to obtain flow data, longitudinal length measured in river km, average
discharge during 1970-2013 (m3/s), and percent of days with zero flow (dry).
ID
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Description
Mainstem Red River upstream of Texoma Reservoir
Wichita River between Kemp and Diversion reservoirs
Wichita River upstream from Kemp Reservoir
North Fork Red River upstream of Altus Reservoir
Mainstem Washita River upstream of Texoma Reservoir
Washita River upstream of Foss Reservoir
South Fork Canadian River upstream of Eufaula Reservoir
South Fork Canadian River between Ute and Meredith
reservoirs
North Fork Canadian River between May Avenue Dam
and Eufaula Reservoir
North Fork Canadian River between Overholster and May
Avenue dams
North Fork Canadian River between Canton Reservoir and
Overholser Dam
North Fork Canadian River between Optima and Canton
reservoirs
North Fork Canadian River between Weatherly and
Optima reservoirs
Cimarron River between Courthouse Old Settlers
Diversion Dam and Keystone Reservoir
Cimarron River upstream of Courthouse Old Settlers
Diversion Dam
Arkansas and Salt Fork Arkansas rivers downstream of
Great Salt Plains and Kaw reservoirs
Salt Fork Arkansas River upstream of Great Salt Plains
Reservoir
Arkansas and Ninnescah rivers between Lincoln
Street/Kingman dams and Kaw Reservoir
USGS
7315500
7312100
7311700
7301500
7328100
7316500
7228500
Length
793
18
203
162
685
131
793
Discharge
68.5
3.8
1.6
3.3
20.0
0.7
8.7
Dry
0.0
0.0
0.0
14.0
0.0
17.0
1.2
7227500
220
3.7
2.2
7242000
378
26.6
0.0
7241000
11
6.0
0.0
7239450
179
6.6
0.0
7234000
374
0.5
25.1
7232500
359
0.1
58.1
7159100
528
23.4
0.0
7156900
295
1.3
0.0
7151000
292
30.7
0.0
7148400
186
3.3
0.0
7145500
251
15.3
0.0
Table S1 Continued.
ID
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
Description
Ninnescah River between Pratt Community Reservoir and
Kingman Diversion Dam
Arkansas River between 21st and Lincoln Street dams
Arkansas River between Great Bend, KS and 21st Street Dam
Arkansas River between Larkin and Great Bend, KS
Kansas River between Milford Reservoir and Bowersock Dam
Smoky Hill River between Cedar Bluff and Kanopolis
reservoirs
Smoky Hill upstream of Cedar Bluff Reservoir
Saline River upstream of Wilson Reservoir
Solomon River between Cawker City and Beloit Municipal
dams
South Fork Solomon River between Osborne Diversion Dam
and Waconda Reservoir
South Fork Solomon River between Webster Reservoir and
Osborne Diversion Dams
South Fork Solomon River upstream of Webster Reservoir
North Fork Solomon River between Kirwin and Waconda
reservoirs
North Fork Solomon River upstream of Kirwin Reservoir
Republican River between Harlan County and Milford
reservoirs
White Rock Creek upstream of Lovewell Dam
Republican River between Trenton Dam and Harlan County
Reservoir
Republican River upstream of Swanson Reservoir
Platte River downstream of Gothenburg Diversion Dam
USGS
Length Discharge
Dry
7144910
7143375
7143330
7139500
6889000
76
9
178
290
177
16.36
19.3
14.0
1.3
171.9
0.0
0.0
0.0
65.4
0.0
6864050
6861000
6867000
222
207
189
3.1
0.4
2.0
0.0
9.6
0.0
6875900
43
6.9
0.0
6874000
32
2.3
0.0
6873200
6873000
101
90
0.8
0.8
56.0
12.0
6872500
6871000
90
107
2.7
0.6
0.0
28.3
6856000
6853800
332
89
13.6
0.8
0.0
1.9
6843500
6827500
6770500
181
125
504
4.3
0.5
52.0
1.5
36.7
2.3
North Platte River between Kingsley Dam and Gothenburg
38 Diversion Dam
North Platte River between Wyoming/Nebraska Diversion
39 Dam to McConaughy Reservoir
6690500
117
19.3
30.9
6674500
198
25.1
0.6
Table S2.AICc results (A) Hybognathus placitus (B) Notropis atherinoides, (C) Cyprinella lutrensis unadjusted and adjusted for latitude.
Provided are the model parameters (null = intercept only), number of parameters (K), Akaike’s Information Criterion adjusted for small
sample size (AICc), AICc difference between each model and the highest ranked model (Delta AICc), the AIC weight (AICcWt), cumulative
weights (Cum Wt) and the log-likelihood values (LL). Bold indicates the best model.
2A.
Hybognathus placitus
Model (Hec)
Null
Length
Discharge
Dry
length+discharge
length+dry
discharge+dry
length+discharge+dry
K
2
3
3
3
4
4
4
5
AICc
-15.11
-11.37
-10.36
-8.27
2.36
2.44
3.12
44.32
Unadjusted
Delta_AICc AICcWt
0
0.78
3.75
0.12
4.76
0.07
6.85
0.03
17.47
0
17.55
0
18.23
0
59.44
0
K
2
3
3
3
4
4
4
5
Adjusted for Latitude
AICc
Delta_AICc AICcWt
-16.42
0
0.6
-14.06
2.37
0.19
-14.13
2.3
0.19
-9.45
6.98
0.02
-0.29
16.13
0
-0.13
16.29
0
-0.17
16.26
0
41.71
58.13
0
LL
11.06
12.68
12.18
11.13
12.82
12.78
12.44
12.84
LL
11.71
14.03
14.06
11.72
14.15
14.07
14.08
14.15
Model (Hoc)
Null
Discharge
Length
Dry
length+discharge
discharge+dry
length+dry
length+discharge+dry
K
2
3
3
3
4
4
4
5
AICc
-28.15
-25.78
-23.22
-21.18
-15.26
-11.8
-9.29
24.03
Delta_AICc AICcWt
LL
0
0.7
17.57
2.37
0.21
19.89
4.93
0.06
18.61
6.97
0.02
17.59
12.89
0
21.63
16.35
0
19.9
18.86
0
18.64
52.18
0
22.98
K
2
3
3
3
4
4
4
5
AICc
-28.51
-25.36
-23.59
-21.52
-12.75
-11.61
-9.59
27.01
Delta_AICc
0
3.15
4.93
6.99
15.76
16.9
18.92
55.52
AICcWt
0.76
0.16
0.06
0.02
0
0
0
0
LL
17.76
19.68
18.79
17.76
20.38
19.81
18.8
21.5
Model (Nac)
Null
Dry
Length
Discharge
length+discharge
length+dry
discharge+dry
length+discharge+dry
K
2
3
3
3
4
4
4
5
AICc
22.92
28.62
29.49
29.91
36.22
42.15
42.61
78.21
Delta_AICc AICcWt
0
0.89
5.7
0.05
6.58
0.03
6.99
0.03
13.3
0
19.24
0
19.69
0
55.3
0
K
2
3
3
3
4
4
4
5
AICc
16.28
23.26
21.6
22.64
33.81
35.58
36.56
75.29
Delta_AICc
0
6.97
5.32
6.36
17.53
19.3
20.27
59.01
AICcWt
0.88
0.03
0.06
0.04
0
0
0
0
LL
-4.64
-4.63
-3.8
-4.32
-2.91
-3.79
-4.28
-2.65
LL
-7.96
-7.31
-7.75
-7.95
-4.11
-7.08
-7.3
-4.11
2B.
Notropis atherinoides
Model (Hec)
Null
Dry
Length
Discharge
discharge+dry
length+dry
length+discharge
length+discharge+dry
K
2
3
3
3
4
4
4
5
AICc
-19.79
-15.42
-14.2
-14.2
-6.57
-6.24
-4.87
11.74
Delta_AICc AICcWt
0
0.81
4.37
0.09
5.59
0.05
5.59
0.05
13.23
0
13.56
0
14.92
0
31.53
0
LL
13.1
13.71
13.1
13.1
13.95
13.78
13.1
14.13
K
2
3
3
3
4
4
4
5
AICc
-27.04
-22.28
-21.97
-21.46
-13.36
-14.02
-14.12
4.13
Delta_AICc
0
4.76
5.06
5.58
13.67
13.02
12.92
31.17
AICcWt
0.81
0.07
0.06
0.05
0
0
0
0
LL
16.72
17.14
16.99
16.73
17.35
17.68
17.73
17.93
Model (Hoc)
Null
Dry
Length
Discharge
length+discharge
length+dry
discharge+dry
length+discharge+dry
K
2
3
3
3
4
4
4
5
AICc
-18.5
-13.65
-13.57
-13.01
-5.08
-4.75
-4.32
10.87
Delta_AICc AICcWt
0
0.81
4.86
0.07
4.94
0.07
5.49
0.05
13.42
0
13.75
0
14.19
0
29.37
0
LL
12.45
12.82
12.78
12.51
13.21
13.04
12.82
14.57
K
2
3
3
3
4
4
4
5
AICc
-20.89
-15.37
-17.37
-15.57
-11.93
-8.52
-6.58
6.54
Delta_AICc
0
5.53
3.52
5.32
8.96
12.38
14.32
27.43
AICcWt
0.76
0.05
0.13
0.05
0.01
0
0
0
LL
13.65
13.68
14.69
13.79
16.63
14.93
13.96
16.73
Model (Nac)
Null
Dry
Length
Discharge
length+dry
discharge+dry
length+discharge
length+discharge+dry
K
2
3
3
3
4
4
4
5
AICc
26.45
31.34
32.02
32.04
40.51
40.57
41.01
59.17
Delta_AICc AICcWt
0
0.83
4.89
0.07
5.57
0.05
5.59
0.05
14.07
0
14.12
0
14.56
0
32.72
0
LL
-10.02
-9.67
-10.01
-10.02
-9.59
-9.62
-9.84
-9.58
K
2
3
3
3
4
4
4
5
AICc
22.45
27.62
27.93
27.95
36.67
36.46
37.26
55.06
Delta_AICc
0
5.17
5.47
5.5
14.22
14.01
14.81
32.61
AICcWt
0.83
0.06
0.05
0.05
0
0
0
0
LL
-8.03
-7.81
-7.96
-7.98
-7.67
-7.56
-7.96
-7.53
2C.
Cyprinella lutrensis
Model (Hec)
Null
Dry
discharge
Length
discharge+dry
length+discharge
length+dry
length+discharge+dry
AICc
-24.98
-21.16
-20.97
-20.7
-15.36
-15.29
-15.19
-6.72
Unadjusted
Delta_AICc AICcWt
0
0.7
3.82
0.1
4
0.09
4.27
0.08
9.62
0.01
9.69
0.01
9.79
0.01
18.26
0
K
2
3
3
3
4
4
4
5
Model (Hoc)
Null
discharge
Dry
Length
discharge+dry
length+discharge
length+dry
length+discharge+dry
Model (Nac)
Null
Length
dry
discharge
length+dry
length+discharge
discharge+dry
length+discharge+dry
K
2
3
3
3
4
4
4
5
Adjusted for Latitude
AICc Delta_AICc AICcWt
-40.87
0
0.7
-36.59
4.28
0.08
-36.61
4.26
0.08
-37.21
3.65
0.11
-30.62
10.25
0
-31.99
8.87
0.01
-31.25
9.62
0.01
-23.01
17.85
0
LL
15.35
15.58
15.49
15.35
15.68
15.65
15.6
15.86
LL
23.29
23.29
23.3
23.61
23.31
24
23.63
24.01
K
2
3
3
3
4
4
4
5
AICc
-9.35
-5.78
-5.56
-5.22
-0.17
0.2
0.32
8.8
Delta_AICc
0
3.57
3.78
4.12
9.18
9.54
9.67
18.15
AICcWt
0.68
0.11
0.1
0.09
0.01
0.01
0.01
0
LL
7.53
7.89
7.78
7.61
8.08
7.9
7.84
8.1
K
2
3
3
3
4
4
4
5
AICc
-9.54
-5.82
-5.61
-5.48
-0.1
0.18
0.21
8.9
Delta_AICc
0
3.71
3.92
4.06
9.44
9.71
9.75
18.44
AICcWt
0.69
0.11
0.1
0.09
0.01
0.01
0.01
0
LL
7.62
7.91
7.81
7.74
8.05
7.91
7.89
8.05
K
2
3
3
3
4
4
4
5
AICc
39.5
41.38
43.28
43.65
46.37
46.76
49.06
54.81
Delta_AICc
0
1.88
3.78
4.15
6.87
7.26
9.55
15.31
AICcWt
0.58
0.23
0.09
0.07
0.02
0.02
0
0
LL
-16.89
-15.69
-16.64
-16.83
-15.19
-15.38
-16.53
-14.91
K
2
3
3
3
4
4
4
5
AICc Delta_AICc
26.23
0.71
25.51
0
30.51
5
26.37
0.85
31.41
5.9
30.46
4.94
32.26
6.75
39.28
13.77
AICcWt
0.27
0.38
0.03
0.25
0.02
0.03
0.01
0
LL
-10.26
-7.76
-10.26
-8.18
-7.71
-7.23
-8.13
-7.14