1. Department of Ecology; Swedish University of Agricultural Sciences (SLU); Box 7044, SE-75007 Uppsala Sweden
2. Stellenbosch Institute for Advanced Study (STIAS); Wallenberg research centre at Stellenbosch University; Marais Street Stellenbosch 7600 South Africa
3. NERC Centre for Ecology & Hydrology; Benson Lane Wallingford, Oxfordshire OX10 8BB UK
4. Department of Earth System Science; University of California Irvine; Irvine California 92697 USA
5. Natural Resources and the Environment; CSIR; P.O. Box 320 Stellenbosch 7599 South Africa
6. Centre for Water Resources Research; School of Agriculture, Earth and Environmental Sciences; University of KwaZulu-Natal; Private Bag X01 Scottsville, Pietermaritzburg 3209 South Africa
7. School of Life Sciences; University of KwaZulu-Natal; Private Bag X01 Scottsville, Pietermaritzburg 3209 South Africa
8. South African Environmental Observation Network; PO Box 2600 Pretoria 0001 South Africa
9. Percy FitzPatrick Institute of African Ornithology; University of Cape Town; Private Baf X3 Rondebosch 7701 Cape Town South Africa
10. Department of Biology; Lund University; SE-223 62 Lund Sweden
11. Centre for Environmental and Climate research; Lund University; SE-223 62 Lund Sweden
12. Department of Physical Geography; Stockholm University; SE-106 91 Stockholm Sweden