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

Autor: Lim JH; Laboratory of Microbial Ecology, Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Ocean and Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Graduate Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia., Lee CW; Laboratory of Microbial Ecology, Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Ocean and Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia. Electronic address: lee@um.edu.my., Bong CW; Laboratory of Microbial Ecology, Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Ocean and Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia., Affendi YA; Institute of Ocean and Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia., Hii YS; School of Fisheries and Aquaculture Sciences, University Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia., Kudo I; Graduate School of Fisheries Sciences, Hokkaido University, Sapporo, Japan.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2018 Mar; Vol. 128, pp. 415-427. Date of Electronic Publication: 2018 Feb 06.
DOI: 10.1016/j.marpolbul.2018.01.037
Abstrakt: 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; R 2  = 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.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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