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Spatial and temporal variability of aerobic anoxygenic photoheterotrophic bacteria along the east coast of Australia

Citation

Bibiloni-Isaksson, J and Seymour, JR and Ingleton, T and van de Kamp, JL and Bodrossy, L and Brown, MV, Spatial and temporal variability of aerobic anoxygenic photoheterotrophic bacteria along the east coast of Australia, Environmental Microbiology, 18, (12) pp. 4485-4500. ISSN 1462-2912 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Society for Applied Microbiology and John Wiley & Sons Ltd

DOI: doi:10.1111/1462-2920.13436

Abstract

Aerobic Anoxygenic Phototrophic Bacteria (AAnPB) are ecologically important microorganisms, widespread in oceanic photic zones. However, the key environmental drivers underpinning AAnPB abundance and diversity are still largely undefined. The temporal patterns in AAnPB dynamics at three oceanographic reference stations spanning at approximately 15 latitude along the Australian east coast were examined. AAnPB abundance was highly variable, with pufM gene copies ranging from 1.1 102 to 1.4 105 ml−1 and positively correlated with day length and solar radiation. pufM gene Miseq sequencing revealed that the majority of sequences were closely related to those obtained previously, suggesting that key AAnPB groups are widely distributed across similar environments globally. Temperature was a major structuring factor for AAnPB assemblages across large spatial scales, correlating positively with richness and Gammaproteobacteria (phylogroup K) abundance but negatively with Roseobacter-clade (phylogroup E) abundance, with temperatures between 16C and 18C identified as a potential transition zone between these groups. Network analysis revealed that discrete AAnPB populations exploit specific niches defined by varying temperature, light and nutrient conditions in the Tasman Sea system, with evidence for both niche sharing and partitioning amongst closely related operational taxonomic units.

Item Details

Item Type:Refereed Article
Keywords:bacteria, bacteriology, Australia, aerobic anoxygenic photoheterotrophic bacteria
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Microbial Ecology
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Marine Environments
Author:Bodrossy, L (Dr Levente Bodrossy)
ID Code:118299
Year Published:2016
Deposited By:IMAS - Directorate
Deposited On:2017-07-10
Last Modified:2017-10-17
Downloads:0

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