Document Type
Conference Item
Publication Date
10-1-2012
Abstract
In this study, monthly samplings were conducted at Port Klang and Port Dickson over a two-year period to measure potential production rate and loss rates of picocyanobacteria using the Landry Hassett dilution technique. Twelve sets of two-factorial experiment were also carried out to further investigate the effect of light and nutrient on picocyanobacteria production rate. Significantly lower abundance was measured at Port Klang (2.80 ± .172 x 104 cell rnl") compared to Port Dickson (13.2 ± 4.68 x 104 cell ml') (Student's z-test: I = 9.80, df= 40, P < 0.001). Potential production and loss rates observed at Port Klang (3.77 - 70.4 and 1.88 - 75.60 x 102 cell ml' hOi)were also much lower than Port Dickson (2.32 - 15.90 and 1.06 - 18.4 x 103cell ml" hOi)(Student's 1-test: 1= 9.63, df= 37, P < 0.001; 1= 7.49, df= 43, P < 0.001). In the twofactorial experiment, only nutrient (F = 7.00, P < 0.05) showed a significant effect on production rate. However, the interaction between light and nutrient also have a significant effect on production rate (F = 5.80, P > 0.05). These results suggest that in tropical coastal waters, nutrient played a more important role in affecting the picocyanobacteria production rate compared to light.
Keywords
Picocyanobacteria, Nutrient, Port Dickson, Light
Divisions
Science
Event Title
2nd Conference for Regional Cooperation in Ocean and Earth Science Research in the South China Sea
Event Location
University of Malaya, Kuala Lumpur, Malaysia
Event Dates
21-24 October 2012
Event Type
conference