Lim, Joon Hai and Lee, Choon Weng and Bong, Chui Wei and Affendi, Yang Amri and Hii, Yii Siang and Kudo, Isao (2018) Distributions of particulate and dissolved phosphorus in aquatic habitats of Peninsular Malaysia. Marine Pollution Bulletin, 128. pp. 415-427. ISSN 0025-326X, DOI https://doi.org/10.1016/j.marpolbul.2018.01.037.
Full text not available from this repository.Abstract
Particulate phosphorus was the dominant phosphorus species and accounted for 72 ± 5% of total phosphorus in coastal habitats, 63 ± 4% in estuaries, 58 ± 6% in lakes and 80 ± 7% in aquaculture farms whereas dissolved inorganic phosphorus (DIP) and dissolved organic phosphorus (DOP) were minor components. Correlation analyses (DIP vs Chl a; R2 = 0.407, df = 31, p < 0.001) suggested phosphorus limiting conditions in lakes, which was corroborated with the highest alkaline phosphatase activity (APA) that fluctuated from 0.38 to 41.14 nmol L−1 min−1. In contrast, APA was elevated in coastal habitats and estuaries only when DIP concentration decreased below 0.9 μM. Moreover size-fractionation experiment showed that the highest APA was detected in the 0.2–2 μm pico-size fraction. Our results suggested that the main APA in coastal habitats and estuaries was from phototrophic pico-eukaryotes and heterotrophic bacteria, and regulated largely by DIP availability.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya (RP001D-13SUS and UM.C/625/1/HIR/050), Ministry of Higher Education (HiCoE grant IOES-2014D) |
| Uncontrolled Keywords: | Particulate phosphorus; Dissolved inorganic phosphorus; Dissolved organic phosphorus; Alkaline phosphatase activity; Tropical waters |
| Subjects: | Q Science > Q Science (General) Q Science > QH Natural history |
| Divisions: | Faculty of Science > Institute of Biological Sciences Deputy Vice Chancellor (Research & Innovation) Office > Institute of Ocean and Earth Sciences |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 11 Jun 2019 03:24 |
| Last Modified: | 11 Jun 2019 03:24 |
| URI: | http://eprints.um.edu.my/id/eprint/21451 |
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