Supplement to: Franz, Markus; Barboza, Francisco Rafael; Hinrichsen, Hans-Harald; Lehmann, Andreas; Scotti, Marco; Hiebenthal, Claas; Molis, Markus; Schütt, Renate; Wahl, Martin (2019): Long-term records of hard-bottom communities in the southwestern Baltic Sea reveal the decline of a foundation species. Estuarine, Coastal and Shelf Science, 219, 242-251, https://doi.org/10.1016/j.ecss.2019.02.029