Title:

Evaluating species-specific changes in hydrologic regimes: an iterative approach for salmonids in the Greater Yellowstone Area (USA)

Journal:

Reviews in Fish Biology and Fisheries

Authors:

Robert Al-Chokhachy1, Adam J. Sepulveda, Andrew M. Ray, David P. Thoma, Michael T. Tercek

1U.S. Geological Survey, Northern Rocky Mountain Science Center, 2327 University Way, Suite 2, Bozeman, MT 59715; PH: 406-994-7842; FAX: 406-994-6556, EM:

1Denotes corresponding author

Supplemental Tables and Figures

Supplemental Table 1. Slope estimates, SE, and P-values from linear regression analyses describing trends in summer 7-day minimum streamflow (standardized; 7-day Min) across three different periods of record (POR) and sites in the Greater Yellowstone Area, USA.

POR / Site / Slope / SE / P
1930 - 2015 / Clarks Fork Yellowstone / -0.012 / 0.004 / 0.005
Gallatin River / 0.009 / 0.005 / 0.063
Green River / -0.007 / 0.005 / 0.155
Yellowstone River-Billings / -0.001 / 0.004 / 0.888
Yellowstone River- Yellowstone Lake / 0.002 / 0.005 / 0.726
1950 - 2015 / Clarks Fork Yellowstone / -0.016 / 0.006 / 0.014
Gallatin River / -0.011 / 0.006 / 0.090
Green River / -0.017 / 0.006 / 0.007
Greys River / 0.002 / 0.007 / 0.834
Pacific Creek / -0.011 / 0.006 / 0.081
Ruby River / 0.004 / 0.007 / 0.572
Smiths Fork / -0.005 / 0.006 / 0.468
Stillwater River / -0.015 / 0.006 / 0.026
Yellowstone River-Billings / -0.014 / 0.006 / 0.031
Yellowstone River- Yellowstone Lake / -0.012 / 0.006 / 0.055
1970 - 2015 / Boulder River / -0.015 / 0.011 / 0.180
Buffalo Fork / -0.009 / 0.011 / 0.429
Bull Lake Creek / -0.018 / 0.011 / 0.113
Clarks Fork Yellowstone / -0.020 / 0.011 / 0.065
Gallatin River / -0.029 / 0.011 / 0.017
Green River / -0.031 / 0.010 / 0.004
Greys River / -0.015 / 0.011 / 0.174
Pacific Creek / -0.024 / 0.011 / 0.037
Ruby River / -0.016 / 0.011 / 0.154
Smiths Fork / -0.013 / 0.011 / 0.264
South Fork Shoshone River / -0.016 / 0.011 / 0.155
Stillwater River / -0.032 / 0.010 / 0.003
Teton River / -0.029 / 0.010 / 0.009
West Rosebud Creek / -0.015 / 0.011 / 0.190
Yellowstone River-Billings / -0.031 / 0.010 / 0.005
Yellowstone River-Yellowstone Lake / -0.023 / 0.011 / 0.042

Supplemental Table 2. Slope estimates, SE, and P-values from linear regression analyses describing trends in the total volume (TotalQ) across three different periods of record (POR)and sites in the Greater Yellowstone Area, USA.

POR / Site / Slope / SE / P
1930 - 2015 / Clarks Forks Yellowstone River / 0.0044 / 0.0043 / 0.318
Gallatin River / 0.0089 / 0.0043 / 0.045
Green River / -0.0058 / 0.0045 / 0.198
Yellowstone River-Billings / 0.0050 / 0.0043 / 0.254
Yellowstone River-Yellowstone Lake / 0.0073 / 0.0043 / 0.096
1950 - 2015 / Boulder River / -0.0122 / 0.0066 / 0.068
Clarks Fork Yellowstone / -0.0029 / 0.0065 / 0.660
Gallatin River / -0.0047 / 0.0065 / 0.475
Green River / -0.0144 / 0.0063 / 0.025
Pacific Creek / -0.0027 / 0.0065 / 0.678
Ruby River / 0.0006 / 0.0066 / 0.927
Smiths Fork / -0.0095 / 0.0064 / 0.143
Stillwater River / -0.0093 / 0.0066 / 0.162
Yellowstone River-Billings / -0.0065 / 0.0065 / 0.319
Yellowstone River-Yellowstone Lake / -0.0040 / 0.0065 / 0.543
1970 - 2015 / Boulder River / -0.0203 / 0.0108 / 0.067
Buffalo Fork River / -0.0078 / 0.0112 / 0.487
Bull Lake Creek / -0.0157 / 0.0110 / 0.160
Clarks Fork Yellowstone / -0.0052 / 0.0112 / 0.646
Gallatin River / -0.0198 / 0.0119 / 0.106
Green River / -0.0166 / 0.0110 / 0.137
Greys River / -0.0153 / 0.0110 / 0.172
Pacific Creek / -0.0077 / 0.0118 / 0.516
Ruby River / -0.0252 / 0.0107 / 0.024
South Fork Shoshone River / -0.0004 / 0.0112 / 0.971
Smiths Fork / -0.0198 / 0.0108 / 0.074
Stillwater River / -0.0236 / 0.0107 / 0.034
Teton Creek / -0.0170 / 0.0109 / 0.128
West Rosebud Creek / -0.0090 / 0.0111 / 0.425
Yellowstone River-Billings / -0.0180 / 0.0109 / 0.106
Yellowstone River-Yellowstone Lake / -0.0094 / 0.0113 / 0.410

Supplemental Fig. 1. Minimum monthly January (a), March (b), and July (c) air temperature trends from Moran Junction, Wyoming in Grand Teton National Park for 1930 to 2015 (

Supplemental Fig. 2. Annual 7-day minimum (7-day Min) summer discharge for the Gallatin River at Gallatin Gateway, MT.

Supplemental Fig. 3. An example of correlated streamflow metrics for the Clarks Fork Yellowstone River, MT displaying the date of peak discharge (year day; a) and summer 7-day minimum (b) plotted against total volume from 1950 to 2015.