Putative roles of bacteria in the carbon and nitrogen cycles in a tropical peat swamp forest

Chin Chin Too; Kuan Shion Ong; Catherine Yule; Alexander Keller

doi:10.1016/j.baae.2020.10.004

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Putative roles of bacteria in the carbon and nitrogen cycles in a tropical peat swamp forest

Journal article

Peer reviewed

Putative roles of bacteria in the carbon and nitrogen cycles in a tropical peat swamp forest

Chin Chin Too, Kuan Shion Ong, Catherine Yule and Alexander Keller

Basic and Applied Ecology, Vol.52, pp.109-123

2021

DOI: https://doi.org/10.1016/j.baae.2020.10.004

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Abstract

tropical peat swamp forest

carbon cycle

nitrogen cycle

whole-genome sequencing

methanotrophy

dissimilatory nitrate reduction to ammonium

Tropical peat swamp forests are waterlogged, acidic, anoxic and oligotrophic ecosystems. They are important terrestrial carbon pools that help mitigating global warming through carbon sequestration in peat. This study aimed at investigating putative roles of bacteria in the carbon and nitrogen cycles in North Selangor peat swamp forest, Malaysia. Whole-genome sequencing was performed on four bacterial isolates using Illumina NextSeq 500 to decipher their genetic information while Gen III Microplate (Biolog) was applied to verify carbon source utilization. The isolates were identified as Dyella sp. strain C9, Dyella sp. strain C11, Klebsiella sp. strain C31 and Paraburkholderia sp. strain C35. Both Dyella spp. and Paraburkholderia sp. strain C35 were likely novel species while Klebsiella sp. strain C31 was a different strain of the type species, Klebsiella pneumoniae. Both genomic and bioassay results suggested the involvement of the isolates in the degradation of lignocellulose, carbohydrates, sugar alcohols, organic acids and aromatic compounds. The isolates could potentially perform methanotrophy, which helps to mitigate methane emissions from tropical peatlands. In addition, the isolates also contained genes encoding enzymes for nitrite, nitrate and nitric oxide reduction, as well as dissimilatory nitrate reduction to ammonium, which retains the nitrogen in the ecosystems. The results generated insights into potential functions of bacteria in the energy production and nutrient cycling of tropical peatlands, which are essential for the sustainability of high biomass and biodiversity in these ecosystems.

Details

Title: Putative roles of bacteria in the carbon and nitrogen cycles in a tropical peat swamp forest
Authors: Chin Chin Too (Author) - Monash University Malaysia
Kuan Shion Ong (Author) - Monash University Malaysia
Catherine Yule (Author) - University of the Sunshine Coast, Queensland, School of Science and Engineering - Legacy
Alexander Keller (Author) - University of Würzburg
Publication details: Basic and Applied Ecology, Vol.52, pp.109-123
Publisher: Elsevier GmbH
DOI: 10.1016/j.baae.2020.10.004
ISSN: 1618-0089
Organisation Unit: School of Science, Technology and Engineering; School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99484008002621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Ecology

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