Wilson Bodingin (2008) The effect of nitrate and phosphate on the growth of harmful algae Cochlodinium polykrikoides. Universiti Malaysia Sabah. (Unpublished)
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Abstract
The harmful algae species Cochlodinium polykrikoides was studied to investigate the effects of nitrate and phosphate concentrations on the growth and chlorophyll a production. The experiments were conducted at constant temperature 25°C, l00μmolm�²s�¹ and under 12:12 light: dark photo cycle and the culture media used was the f/2 media with nitrate concentrations ranged from 2.21X10��M to 1.09X10�³M and phosphate concentrations ranged from 9.06X10��M to 5.07X10��M. In the nitrate experiment, the cells density increase significantly (P<0.05) as the nitrate concentration increased. C polykrikoides exhibited the highest maximum cell density (512±97cells/mL) at nitrate concentration 9.41X10��M with chlorophyll a 6.8708mg/m³. The growth of the Cochlodinium polykrikoides are inhibited at the highest nitrate concentrations (1.09X10�³M) and the lowest nitrate concentrations (2.21Xl0��M). In the phosphate experiments, the growth of C polykrikoides are also significantly affected (P<0.05) where the highest cell density (742±52cells/mL) was recorded at the lowest phosphate concentrations 9.06Xl0��M with the highest concentration of chlorophyll a at 72.967 mg/m³. The cell density decrease as the phosphate concentrations increases and their growth was inhibited at concentrations of 4.35X10��M and 5.07X10��M. The concentrations of chlorophyll a shows a positive relationship with the cell density
| Item Type: | Academic Exercise |
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| Keyword: | nitrate, phosphate, chlorophyll, temperature, Cochlodinium polykrikoides, cell density |
| Subjects: | S Agriculture > SH Aquaculture. Fisheries. Angling |
| Department: | SCHOOL > School of Science and Technology |
| Depositing User: | SITI AZIZAH BINTI IDRIS - |
| Date Deposited: | 06 Mar 2014 15:40 |
| Last Modified: | 12 Oct 2017 13:40 |
| URI: | https://eprints.ums.edu.my/id/eprint/8441 |
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