Regine Jahn was head of the Diatom Research Group at the Botanischer Garten und Botanisches Museum, Freie Universität Berlin, until March 2019. The group does research in taxonomy, phylogeny and ecology of diatoms. Currently, they are part of the research project German Barcoding of Life. In addition, they are running the algae registration project PhycoBank and the information system AlgaTerra. Geographic focus of their biodiversity research is Germany, Mexico and Korea. The group also organized the 25th International Diatom Symposium which was held in Berlin from 25 – 30 June 2018.