Fig. 3From: Tree water potentials supporting an explanation for the occurrence of Vachellia erioloba in the Namib Desert (Namibia)Namibrand: Plant water potentials of Vachellia erioloba at pre-dawn (blue markers) and midday (empty markers) along the dune ridge (15th to 20th of September). The indications A to C are explained in the text. The transect describes a straight line of 154° from N. The vertical exaggeration is in relation of 1:64Back to article page