Table 1 Morphological measurements (a.–g. in μm) conducted in Herposiphonia bipinnata*, Lophosiphonia cristata, Parviphycus trinitatensis and Polysiphonia scopulorum var. villum growing on Orbicella spp. under non-manipulated (N) and experimental (E) conditions.

From: Morphological and community changes of turf algae in competition with corals

Morphological characters Abbreviation Condition
a. Distance (“spacer”) between erect axes SEA N, E
b. Height of erect axis HEA N, E
c. Diameter of prostrate axis DPA N, E
d. Length of pericentral cells of the prostrate axis (i.e., distance between two upright axes, measured from the centre to the centre of axes, divided by the number of segments of pericentral cells found between the axes) LPC N
e. Distance (“spacer”) between rhizoids SR N, E
f. Length of rhizoids LR N
g. Diameter of rhizoids (measured in close proximity to the prostrate axis) DR N
h. Percentage of fragments with formation of new ramets (i.e., a branch of undetermined growth - with new erect axes, stolon and rhizoids - formed by vegetative growth from an otherwise determined erect axis of the genet) FNR N, E
  1. See text and Fig. 2 for details.
  2. *The formation of erect axes or branches in H. bipinnata is different from the other three species because H. bipinnata produces pairs of erect branches, one of determinate growth and another that can be of indeterminate growth or truncated (cut-off branch), separated by four segments of pericentral cells. Consequently, in H. bipinnata, the percentage of FNR was obtained as the ratio of indeterminate/cut-off branches and the spacer of erect axes was measured between erect determined axes.