Data Descriptor: A European Multi Lake Survey dataset of environmental variables, phytoplankton pigments and cyanotoxins - Mantzouki, Evanthia; Campbell, James; van Loon, Emiel; Visser, Petra; Konstantinou, Iosif; Antoniou, Maria; Giuliani, Gregory; Machado-Vieira, Danielle; de Oliveira, Alinne Gurjao; Maronic, Dubravka Spoljaric; Stevic, Filip; Pfeiffer, Tanja Zuna; et al. (Scientific Data, 2018)