1. U.S. Geological Survey; Nebraska Cooperative Fish and Wildlife Research Unit; School of Natural Resources; University of Nebraska - Lincoln; Lincoln NE USA
2. Department of Aquatic Sciences and Assessment; Swedish University of Agricultural Sciences; PO Box 7050 SE - 750 07 Uppsala Sweden
3. Percy FitzPatrick Institute; DST/NRF Centre of Excellence; University of Cape Town; Rondebosch Cape Town 7701 South Africa
4. Stockholm Resilience Centre; Stockholm University; 106 91 Stockholm Sweden
5. Beijer Institute; Royal Swedish Academy of Sciences; Stockholm Sweden
6. Department of Agronomy and Horticulture; University of Nebraska-Lincoln; Lincoln Nebraska 68503-0984 USA
7. Nebraska Cooperative Fish and Wildlife Research Unit; School of Natural Resources; University of Nebraska-Lincoln; Lincoln Nebraska 68503-0984 USA