The dynamics of attached and free-living bacterial population in tropical coastal waters

Lee, S.W. and Lee, C.W. and Bong, C.W. and Narayanan, Kulathuramaiyer and Sim, E.U.-H. (2015) The dynamics of attached and free-living bacterial population in tropical coastal waters. Marine and Freshwater Research, 66 (8). pp. 701-710. ISSN 1323-1650

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Abstract

We investigated the dynamics of attached and free-living bacterial abundance over a period of 18 months in tropical coastal waters of Malaysia. We measured the abundance at both oligotrophic coastal water (Port Dickson) and eutrophic estuary (Klang), and hypothesised that attached bacteria are predominant in eutrophic waters. We found that bacterial abundance was higher at Klang than Port Dickson (Student's t-test: t≤4.87, d.f.≤19, P<0.001). Attached bacteria also formed a large fraction of the total bacteria at Klang (75% ±13s.d.) relative to Port Dickson (56% ±22), and showed preference for chlorophyll-a-based particles rather than total suspended solids. The bacterial community structure was clearly different between the two stations but was similar between the attached and free-living bacterial population. Our results showed the importance of attached bacteria in eutrophic water where they could play a major role in carbon and nutrient cycling.

Item Type: Article
Uncontrolled Keywords: 16S rRNA PCR; DGGE; LIVE/DEAD bacterial staining; Straits of Malacca, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QR Microbiology
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Karen Kornalius
Date Deposited: 01 Aug 2016 07:33
Last Modified: 01 Aug 2016 07:33
URI: http://ir.unimas.my/id/eprint/12737

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