Abstract:
This study is mainly aimed to study the distribution of phosphorus during Southwest
monsoon, Inter-monsoon, and Northeast monsoon. The sampling stations were visited
three times from September to December 2006. Fourteen sampling stations were
established and the water samplers of these stations were taken at mid-depth due to
the shallowness of lagoon area. The first sampling was carried out on 13 September
2006. The mean values of orthophosphate and total phosphorus during first sampling
were 2.42 ± 0.6lμM and 11.29 ± 3.15μM respectively. The second sampling was
conducted on the 12 October 2006. The mean values of orthophosphate and total
phosphorus during second sampling were 1.17 ± 0.52μM and 7.07 ± 4.73μM
respectively. The third sampling was carried out on 14 December 2006. In general,
the mean values of orthophosphate and total phosphorus during third sampling were
0.98 ± 0.44 μMand 4.07 ± l.41μM respectively. The statistic analysis had suggested
that the orthophosphate (p= 0.052) and total phosphorus (p= 0.230) had no significant
difference (p>0.05) among stations. Orthophosphate (p= 0.000), and total phosphorus
(p= 0.001) indicated a significant difference (p<0.05) among the first, second and
third samplings. Generally, the nitrogen concentration in Setiu Lagoon, Terengganu
was higher than the phosphorus concentration throughout this study.