Fig. 2. Net growth rate of ultraplankton in the presence (Treatment, solid bars)
and absence (Control, open bars) of the HaliclonaCeratodictyon
association. Values are means ± S.D. *Significant
differences between treatments and controls and time of day (^), day
(open circles) vs night (closed circles) (P<0.05).
Significant seasonal differences (P<0.05) are present if
treatments (winter vs summer) do not share an underline.