Stefan Löfgren,^* Eva Ring,^** Claudia von Brömssen,^*** Rasmus Sørensen,^**** Lars Högbom<sup>*****


*</sup>Stefan Löfgren is an associate professor in the Department of Aquatic Sciences and Assessment, SLU, Uppsala. His research focuses on the acidification and eutrophication of surface waters in connection with forestry and agriculture. His address: Department of Aquatic Sciences and Assessment, SLU, P.O. Box 7050, SE-750 07 Uppsala, Sweden. stefan.lofgren@ma.slu.se
^**Eva Ring has a PhD in soil science and works at Skogforsk—The Forestry Research Institute of Sweden. Her research focuses on the environmental effects of forestry on water chemistry. Her address: Skogforsk Uppsala Science Park, SE-751 83 Uppsala, Sweden. eva.ring@skogforsk.se
^***Claudia von Brömssen is a senior lecturer in the Department of Economics, Unit of Applied Statistics and Mathematics, SLU. Her research interests include statistical methods for trend detection in environmental data, with special focus on time series that are influenced by meteorological factors. Her address: Department of Economics, Unit of Applied Statistics and Mathematics, Box 7013, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden. claudia.von.bromssen@ekon.slu.se
^****Rasmus Sørensen is a PhD student in the Department of Aquatic Sciences and Assessment at SLU, Uppsala, Sweden. His studies are focused on mercury leakage from managed forest land, involving studies of forest hydrology. His address: Department of Aquatic Science and Assessment, P.O. Box 7050, SE-750 07 Uppsala, Sweden. rasmus.sorensen@vatten.slu.se
^*****Lars Högbom is an associate professor of soil science and works at Skogforsk—The Forestry Research Institute of Sweden. His research focuses on the environmental effects of forestry, mainly with respect to nitrogen. His address: Skogforsk Uppsala Science Park, SE-751 83 Uppsala, Sweden. lars.hogbom@skogforsk.se