caulerpa taxifolia in moreton bay - Centre for Marine Science ...

Caulerpa taxifolia in Moreton Bay
(p = 0.000) and in interaction with treatment (p = 0.000) (Table 4.3.4.3 in Appendix,
page 60).
Fisher’s post-hoc LSD test showed that the photosynthetic response of the high
C. taxifolia dose treatments in Block 1 (along the north-east wall) were significantly
lower than the high C. taxifolia dose treatments in Block 2 (along the south-west wall)
(p = 0.000), and the same result was obtained for the low C. taxifolia treatment (p =
0.000). There was very little difference between the minimum mean (729 for the low
C. taxifolia dose treatment in Block 1) and the maximum mean obtained (773 for the
high C. taxifolia dose treatment). The random allocation of treatments to tanks
resulted in an uneven block design, with one control tank, two low C. taxifolia dose
treatment tanks and three high C. taxifolia treatment tanks located in Block 1. Block
2 contained three control tanks, two low C. taxifolia dose treatment tanks and one
high C. taxifolia treatment tank. This uneven design, with the lack of tank replicates
of the control and high C. taxifolia dose treatments may make this apparent
significance unreliable.
Effective quantum yield (Fv /Fm)
850
800
750
700
650
600
550
0
7 14 21 28 35
Time (days)
Control
Low C. taxifolia dose
High C. taxifolia dose
Figure 23. Photosynthetic response of Zostera
capricorni to three different concentrations of
Caulerpa taxifolia extract (error = 1 standard error
of the mean).
Jane Thomas -35-
Results