Fig. 2
Schematic representation of each sampling site, a Mar Chiquita, b BahÃa Blanca, c San Antonio. OM organic matter content (in percentage), G gravel (in percentage), P penetrability (Kp cm−2; not available to BB), dotted arrows with numbers indicate tidal height (in meters) necessary to cover the lower part of each mudflat and salt marsh (drawings not scaled)