The spore biomass increased with light and with
PO4–P concentration and the interaction between these
factors was slightly statistically significant ( pb0.05)
(Fig. 2B; Tables 2-4, 3 and 4). PO4–P concentration had
a highly significant influence on algal recruitment
( pb0.0001). Significantly different spore biomasses
were obtained at the different used PO4–P concentrations,
within each light level, with the exception of 6.4