[1] Univ Liverpool, Sch Environm Sci, Liverpool L69 3BX, Merseyside, England
[2] Wageningen Univ, Dept Aquat Ecol & Water Qual Management, Wageningen, Netherlands
[3] Univ Republica, Fac Ciencias CURE, Montevideo, Uruguay
[4] UCL, Environm Change Res Ctr, London, England
[5] Aarhus Univ, Natl Environm Res Inst, DK-8000 Aarhus C, Denmark
[6] Greenland Inst Nat Resources, GCRC, Nuuk, Greenland
[7] Univ Florida, Gainesville, FL 32611 USA
[8] Chinese Acad Sci, Nanjing Inst Geog & Limnol, Nanjing, Jiangsu, Peoples R China
[9] Univ Leuven, Lab Aquat Ecol & Evolutionary Biol, Louvain, Belgium
[10] Univ N Carolina Chapel Hill, Inst Marine Sci, Morehead City, NC USA