Fig. 2

a False color SEM image of zoospores of Ulva linza. b False color environmental-SEM image of a settled spore of Ulva linza showing the annular pad of adhesive surrounding the central spore body (reproduced from [51], reprinted by permission of Taylor and Francis Group Ltd, http://www.informaworld.com). c Cartoon depicting the course of events involved in the settlement and adhesion of Ulva spores (Whole figure adapted from Ref. [52] (Fig. 4.1, ^©Springer-Verlag 2006] with kind permission from Springer Science and Business Media)