Fig. 4

Temperature, pH and salinity within the bay of Ferraria over a 12-h period in June 18, 2008 (1 Jun.), and in November 12, 2008 (1 Nov.), and at Porto Formoso over a 12-h period in July 8, 2008 (2 Jul.). Solid lines correspond to the point nearest to the opening of Ferraria bay (point c; Fig. 2) and easternmost point in Porto Formoso (point a; Fig. 3); dashed lines correspond to the intermediate distance from the opening of Ferraria bay (point b; Fig. 2) and intermediate point in Porto Formoso (point b; Fig. 3); dotted lines correspond to the point furthest away from the opening of Ferraria bay (point a; Fig. 2) and westernmost point in Porto Formoso (point c; Fig. 3); the gray line corresponds to the average value of the dotted, dashed and solid lines, and the bold solid line corresponds to the tidal height