POTTER, Christopher J., U.S. Geological Survey, Mail Stop 939, Denver Federal Center, Denver, CO 80225-0046, cpotter@usgs.gov

GALLEGOS, Tanya J., U.S. Geological Survey, Box 25046, Mail Stop: 973, Bldg 20, Denver Federal Center, Kipling/6th, Denver, CO 80225-0046, tgallegos@usgs.gov and VARELA, Brian, Department of the Interior, United States Geologic Survey, Denver Federal Center, PO BOX 25046, Bldg 25, MS 939, Denver, CO 80225

PRESTON, Todd¹, SMITH, Bruce D.², CHESLEY-PRESTON, Tara³, GLEASON, Robert A.⁴, HAINES, Seth S.⁵, POST VAN DER BURG, Max⁴, SOJDA, Richard S.⁶, TANGEN, Brian⁴, and THAMKE, Joanna⁷, (1) Northern Rocky Mountain Science Center, U.S. Geological Survey, 2327 University Way, Suite 2, Bozeman, MT 59715, tmpreston@usgs.gov, (2) U.S. Geological Survey, Denver Federal Center, Bld 20, ms964, Lakewood, CO 80225, (3) Institute of the Environment, Montana State University, 2327 University Way, Suite 2, Bozeman, MT 59715, (4) U.S. Geological Survey, Northern Prairie Wildlife Research Center, 8711 37th Street SE, Jamestown, ND 58401-7317, (5) U.S. Geological Survey, Northern Prairie Wildlife Research Center, Box 25046, Denver Federal Center Mail Stop 939, Denver, CO 80225-0046, (6) U.S. Geological Survey, Northern Rocky Mountain Science Center, 2327 University Way, Suite 2, Bozeman, MT 59715, (7) U.S. Geological Survey, 3162 Bozeman Ave, Helena, MT 59601

GILMAN, Jessica B.¹, LERNER, B.M.², WARNEKE, C.², GRAUS, M.², KOSS, A.², PEISCHL, J.², WILLIAMS, E.J.³, ROBERTS, J.³, and DE GOUW, J.A.¹, (1) Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, Boulder, CO 80305, jessica.gilman@noaa.gov, (2) Boulder, CO 80305, (3) Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO 80309

POLLOCK, Erik D., University of Arkansas Stable Isotope Laboratory, University of Arkansas, 116 Ferritor Hall, Fayetteville, AR 72701, epolloc@uark.edu, AUSTIN, B.A., Biological Sciences, University of Arkansas, Fayetteville, AR 72701, EVANS WHITE, M.A., Dept. Of Biological Sciences, university of Arkansas, Fayetteville, AR 72701, PONZIO, J., University of ankansas Stable isotope Lab, University of Arkansas, Fayetteville, 72701, and HAGGARD, B.E., Dept of Bio-Ag Engineering, University of Arkansas, Fayetteville, AR 72701

HEILWEIL, Victor M., Utah Water Science Center, U.S. Geological Survey, 2329 Orton Circle, Salt Lake City, UT 84119, heilweil@usgs.gov, SOLOMON, D. Kip, Geology and Geophysics, University of Utah, Frederick Albert Sutton Building, 115 S. 1460 E. Rm 383, Salt Lake City, UT 84112, DARRAH, Thomas H., School of Earth Sciences, The Ohio State University, 275 Mendenhall Laboratory, 125 S. Oval Mall, Columbus, OH 43210, RISSER, Dennis W., Pennsylvania Water Science Center, US Geological Survey, 215 Linekiln Road, New Cumberland, PA 17070, HYNEK, Scott A., Geosciences, Penn State University, University Park, PA 16802, and GRIEVE, Paul, Geosciences, Penn State, 236 Deike, State College, PA 16802

MCMAHON, Peter B., U.S. Geological Survey, Colorado Water Science Center, MS 415 Denver Federal Center, Lakewood, CO 80225, pmcmahon@usgs.gov, THOMAS, Judith C., U.S. Geological Survey, 764 Horizon Dr, Room 125, Grand Junction, CO 81506, and HUNT, Andrew G., U.S. Geological Survey, Denver Federal Center, Bld 21, MS 963, Denver, CO 80225

VENGOSH, Avner¹, WARNER, Nathaniel R.², JACKSON, Robert B.³, and DARRAH, Thomas H.¹, (1) Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC 27708, vengosh@duke.edu, (2) Department of Earth Science, Dartmouth College, Hanover, NH 03755, (3) Nicholas School of the Environment and Center on Global Change, Duke University, Box 90338, Durham, NC 27708

WISTER, Katherine H., WESTON, Nathaniel B., HAGGERTY, Molly K., DONNELLY, Brian R., ALESI, Sara C., IARIA, Toni N., and GOLDSMITH, Steven T., Department of Geography and the Environment, Villanova University, 800 Lancaster Ave, Villanova, PA 19085, kwister@villanova.edu

BOWEN, Zachary H., U.S. Geological Survey, Fort Collins Science Center, 2150C Centre Avenue, Fort Collins, CO 80526-8118, bowenz@usgs.gov, MOTT, David N., U.S. Geological Survey, Oklahoma Water Science Center, 202 NW 66th, Bldg 7, Oklahoma City, OK 73116, and POTTER, Christopher J., U.S. Geological Survey, Mail Stop 939, Denver Federal Center, Denver, CO 80225-0046

SARGENT, Joshua G.¹, PARK, Joshua¹, and OSBORN, Stephen G.², (1) Geological Sciences, California Polytechnic University Pomona, 3801 West Temple Avenue, Pomona, CA 91768, jgsargent@csupomona.edu, (2) Geological Sciences Department, California State Polytechnic University - Pomona, Pomona, 91768

PARK, Joshua, Geological Sciences, Cal Poly Pomona, Pomona, CA 91768, joshuap1@csupomona.edu, SARGENT, Joshua G., Geological Sciences, California Polytechnic University Pomona, 3801 West Temple Avenue, Pomona, CA 91768, and OSBORN, Stephen G., Geological Sciences Department, California State Polytechnic University - Pomona, Pomona, 91768