FIG. 2 in Carbonate production by calcareous red algae and global change

FIG. 2. — Unattached branches, pralines and boxwork rhodoliths, the three end-points of the morphological variability of non-geniculate coralline rhodoliths (Basso 1998; Basso et al. 2009) with relevant structure (B, E, H) and typical sediment production (C, F, I). A-C, unattached branches: A, unattached branches are the most common growth form of maerl forming species; B, unattached branches are usually monospecific and lack a nucleus; C, maerl-related sediment typically composed of branch fragments. D-F, pralines: D, a fruticose growth-form (sensu Woelkerling et al. 1993) of a praline rhodolith; E, pralines have compact internal structure and are commonly nucleated; F, rhodolith beds normally produce pebble-size sediments in a matrix of protuberance fragments and other accompanying biogenic remains. G-I, boxwork rhodoliths: G, deep rhodoliths are typically irregular in shape since growth can be asymmetric (arrow on live thallus); H, macroscopic voids and irregular internal structure of a boxwork rhodolith, usually multispecific; I, cobble-sized boxwork rhodoliths of the outer shelf. Scale bars: A, 1.5 cm; B, 1.5 mm; C-E, H, 1 cm; F, 2 cm; G, I, 4 cm.Published as part of Basso, Daniela, 2012, Geodiversitas 34 (1) on pages 13-33, DOI: 10.5252/g2012n1a2, http://zenodo.org/record/459722