- Continuous developments are listed at their climax period. For more details and for regional differences between the Dutch, Danish, and German Wadden Sea refer to text (based on Hoffmann 1996, 2005; Haywood 1997; Vollmer et al. 2001; Huntley et al. 2002; Bantelmann 2003; Holm 2005; Knottnerus 2005; Lotze 2005; Reise 2005; Prummel and Heinrich 2005; van Beusekom 2005; Wolff 2005)