Distributions of particulate and dissolved phosphorus in aquatic habitats of Peninsular Malaysia

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

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Official URL: https://doi.org/10.1016/j.marpolbul.2018.01.037

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
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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