Fig. 2

Data of May 1994. Variations in a water depth (dotted line) and current velocity (solid line), b Chl-a (μg l⁻¹), c Seston or SPM (mg l⁻¹), d bacterial cell numbers. For b, c and d, solid lines are surface samples, dotted lines are bottom samples. This figure was taken with kind permission from Springer Science + Business Media, Helgoland Marine Research, ‘Tidal impact on planktonic primary and bacterial production in the German Wadden Sea’, 53, 1999, pp. 19–27, K. Poremba, U. Tillmann, K.-J. Hesse, Fig. 2 a, c, e and f. ^©Springer-Verlag and AWI 1999. Used with kind permission of the authors