Fig. 2From: The megaepifauna of the Dogger Bank (North Sea): species composition and faunal characteristics 1991–2008Species richness. The upper curve (broken line) shows the total number of species determined per cruise (left y-axis). The lower, solid line (smoothed species curve) was constructed by dividing the total number of species by the number of stations sampled per cruise and is non-dimensional by itself (right y-axis). The two thin lines are the exponential curve fitsBack to article page