1. Laboratory of Ecohydrology ECHO/IIE/ENACÉcole Polytechinque Fédérale de LausanneLausanne Switzerland
2. U.S. Forest Service Northern Research Station, Hubbard Brook Experimental ForestNorth Woodstock New Hampshire USA
3. Center for the Environment, Plymouth State UniversityPlymouth New Hampshire USA
4. Dipartimento ICEAUniversità degli studi di PadovaPadua Italy
5. Cary Institute of Ecosystem StudiesMillbrook New York USA
6. Department of Ecology and Evolutionary BiologyUniversity of ConnecticutStorrs Connecticut USA
7. Virginia Water Resources Research Center, Department of Forest Resources and Environmental ConservationVirginia TechBlacksburg Virginia USA