“…Evolution of species distribution in time was investigated in a comparison of the current situation to 1995 (Dekoninck, 1996), 2003(Vandevoorde (2016 The Bolboschoenus maritimus population did not change so much. Compared to 1995, tufts of all species are again positioned lower in the tidal window in the fresh tidal zone as was the case in the early 20 th century (Meire et al, 1992).…”