1. Applied and Restoration Ecology Group; Pyrenean Institute of Ecology (IPE-CSIC); Zaragoza Spain
2. CNRS, UMR 5023, LEHNA; Biodiversité des Ecosystèmes Lotiques; Université Lyon 1; Villeurbanne France
3. Laboratory of Ecology and Aquatic Biology; University of Geneva; Carouge Switzerland
4. Swiss Federal Institute of Aquatic Science and Technology; Dübendorf Switzerland
5. Stroud Water Research Center; Avondale PA U.S.A
6. Australian Rivers Institute; Griffith University; Nathan Qld Australia
7. Instituto Nacional de Limnologia (UNL-CONICET); Santa Fe Argentina