Data providers for: Phytoplankton species richness along coastal and estuarine salinity continua. Olli K, Ptacnik R, Klais R, Tamminen T Date Published: January 2, 2019 DOI: https://doi.org/10.5061/dryad.q6m40r0.2 The data for the Chesapeake Bay were kindly provided by Kevin G. Sellner (Chesapeake Research Consortium, USA) The Baltic Sea data were provided by eight academic institutions: Finnish Environment Institute, Finnish Institute of Marine Research, City of Helsinki Environmental Centre (Finland), Institute of Aquatic Sciences (Latvia), Stockholm University (Sweden), Institut für Ostseeforschung Warnemünde (Germany), National Environmental Research Institute (Denmark), Estonian Marine Institute.