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Phosphorus Cycling between Sediment and Overlying Water in Ben Chifely Reservoir, Australia under Simulated Core Incubation |
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| รหัสดีโอไอ | |
| Creator | AKM M Rahman |
| Title | Phosphorus Cycling between Sediment and Overlying Water in Ben Chifely Reservoir, Australia under Simulated Core Incubation |
| Contributor | Dhia Al Bakri |
| Publisher | Faculty of Environment and Resource Studies, Mahidol University |
| Publication Year | 2561 |
| Journal Title | Environment and Natural Resources Journal |
| Journal Vol. | 16 |
| Journal No. | 2 |
| Page no. | 11 to 19 |
| Keyword | Phosphorus/ Sediment/ Overlying water/ Core incubation/ P fractions/ Oxic/ Anoxic |
| URL Website | https://www.tci-thaijo.org/index.php/ennrj/index |
| Website title | Environment and Natural Resources Journal |
| ISSN | 1686-5456 |
| Abstract | The flux of soluble reactive phosphorus (SRP) was estimated under simulated oxic, anoxic and aerated conditions in sediment cores collected from two sites in a meso-eutrophic reservoir that differ in depth and limnological characteristics. Hypolimnetic accumulation and the concentration of P in various sediment fractions were also studied to determine the factors and processes influencing SRP flux at the sediment-water interface. The average release of SRP under anoxic incubation varied between 16 - 70 ?mol/m2/day and 20 - 94 ?mol/m2/day in shallow and deep-water sites respectively. On the other hand, SRP was almost entirely lost to the sediment during simulated oxic or aerated experiments. Temperature influence on P release from the sediment was significant and the increment is considerable at water temperature above 20oC. The reservoir sediment contained a large proportion of iron and aluminum bound P (Fe and Al-P). Fe and P ratio in the sediment exceeded 15 indicating high retention capacity of P by the sediment. Besides, the high amount of Fe and Al-P in the sediment reflects redox dependent P mobilization. Therefore, management needs targeting retention capacity of the sediment and alteration of anoxic condition in the hypolimnion during warmer months. |
