Liu, Boyu and Lee, Choon Weng and Bong, Chui Wei and Wang, Ai-Jun (2024) Investigating Escherichia coli habitat transition from sediments to water in tropical urban lakes. PeerJ, 12. ISSN 2167-8359, DOI https://doi.org/10.7717/peerj.16556.
Full text not available from this repository.Abstract
Background. Escherichia coli is a commonly used faecal indicator bacterium to assess the level of faecal contamination in aquatic habitats. However, extensive studies have reported that sediment acts as a natural reservoir of E. coli in the extraintestinal environment. E. coli can be released from the sediment, and this may lead to overestimating the level of faecal contamination during water quality surveillance. Thus, we aimed to investigate the effects of E. coli habitat transition from sediment to water on its abundance in the water column. Methods. This study enumerated the abundance of E. coli in the water and sediment at five urban lakes in the Kuala Lumpur-Petaling Jaya area, state of Selangor, Malaysia. We developed a novel method for measuring habitat transition rate of sediment E. coli to the water column, and evaluated the effects of habitat transition on E. coli abundance in the water column after accounting for its decay in the water column. Results. The abundance of E. coli in the sediment ranged from below detection to 12,000 cfu g–1, and was about one order higher than in the water column (1 to 2,300 cfu mL–1). The habitat transition rates ranged from 0.03 to 0.41 h–1. In contrast, the E. coli decay rates ranged from 0.02 to 0.16 h−1. In most cases (>80), the habitat transition rates were higher than the decay rates in our study. Discussion. Our study provided a possible explanation for the persistence of E. coli in tropical lakes. To the best of our knowledge, this is the first quantitative study on habitat transition of E. coli from sediments to water column. Copyright 2024 Liu et al.
| Item Type: | Article |
|---|---|
| Funders: | National Natural Science Foundation of China [Grant no. 41961144022], Ministry of Higher Education, Malaysia [Grant no. MOHE-HiCoE IOES-2023C] |
| Uncontrolled Keywords: | Decay rate; Escherichia coli; Faecal indicator bacteria; Habitat transition; Sediment |
| Subjects: | Q Science > QH Natural history > QH301 Biology |
| Divisions: | Faculty of Science > Institute of Biological Sciences |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 25 Apr 2024 01:34 |
| Last Modified: | 25 Apr 2024 01:34 |
| URI: | http://eprints.um.edu.my/id/eprint/44971 |
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