Fig1.eps

Fig. 1 Map of the river Meuse in the Netherlands. Shell collection sites are black dots; Rijkswaterstaat gauging stations are circles. (Made with Online Map Creation: http://www.aquarius.geomar.de/) From: Versteegh, E.A.A., Vonhof, H.B., Troelstra, S.R., Kroon, D., 2011. Can shells of freshwater mussels (Unionidae) be used to estimate low summer discharge of rivers and associated droughts? International Journal of Earth Sciences 100(6): 1423-1432.