1. INRA Université de Savoie UMR CARRTEL Thonon les Bains France
2. Swedish University of Agricultural Sciences Department of Aquatic Resources (SLU Aqua) Institute of Freshwater Research Stångholmsvägen 2 178 93 Drottningholm Sweden
3. Department of Physics University of Oslo PO. Box. 1048. Blindern NO‐0317 Oslo Norway
4. IRD UMR LEMAR 6539 (CNRS‐IRD‐IFREMER‐UBO) BP70, 29280 Plouzané France
5. European Regional Centre for Ecohydrology Polish Academy of Sciences Tylna 3 str. 90‐364 Łódź Poland