1. Department of Chemistry, Umeå University, Umeå 901 87, Sweden
2. Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala 750 07, Sweden
3. Department of Marine Biology and Oceanography, Institute of Marine Sciences, Spanish National Research Council (CSIC), Barcelona 08003, Spain
4. Department of Environmental Research and Monitoring, Swedish Museum of Natural History, Stockholm 104 05, Sweden
5. Centre for Ecology and Evolution in Microbial Model Systems─EEMiS, Linnaeus University, Kalmar 391 82, Sweden
6. Department of Chemistry, Uppsala University, Uppsala 751 23, Sweden