<p>(<b>A</b>) Scheme and purpose of sampling. (<b>B</b>) The morphogenetic activity of sterile-filtered water collected from several sampling sites within the lagoon [(1–3: Ramalhete Marine Station, blue dot) in 2010, (1–11, red dots) in 2011 and (1–6, green dots) in 2012] and two control samples outside the lagoon was tested on axenic <i>Ulva mutabilis</i> gametes sl mt(+). The numbers of the sites represent the chronological order of the sampling.</p
