Influence of historical inundation frequency on soil microbes (Cyanobacteria, Proteobacteria, Actinobacteria) in semi-arid floodplain wetlands

Kobayashi, T; Ralph, TJ; Sharma, P; Mitrovic, SM

Influence of historical inundation frequency on soil microbes (Cyanobacteria, Proteobacteria, Actinobacteria) in semi-arid floodplain wetlands

Kobayashi, T Ralph, TJ Sharma, P Mitrovic, SM

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Publisher:: CSIRO PUBLISHING
Publication Type:: Journal Article
Citation:: Marine and Freshwater Research, 2020, 71, (5), pp. 617-625
Issue Date:: 2020-01-01

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Field	Value	Language
dc.contributor.author	Kobayashi, T
dc.contributor.author	Ralph, TJ
dc.contributor.author	Sharma, P
dc.contributor.author	Mitrovic, SM
dc.date.accessioned	2020-12-16T04:45:30Z
dc.date.available	2020-12-16T04:45:30Z
dc.date.issued	2020-01-01
dc.identifier.citation	Marine and Freshwater Research, 2020, 71, (5), pp. 617-625
dc.identifier.issn	1323-1650
dc.identifier.issn	1448-6059
dc.identifier.uri	http://hdl.handle.net/10453/144766
dc.description.abstract	© 2020 CSIRO. Cyanobacteria and other microbes are important moderators of biogeochemical processes in semi-arid floodplain wetlands with varying inundation regimes. Inundation is a key environmental driver for floodplain biological communities. Little is known about the effect of historical inundation frequency on the spatial abundance of floodplain-wetland Cyanobacteria and other microbes. In this study, soil samples were collected at two locations with a gradient of low-to-high inundation frequency in the Macquarie Marshes, south-east Australia. We used high-throughput sequencing to estimate the proportional abundance of the soil Cyanobacteria and other dominant microbes, targeting the bacterial 16S rRNA gene. Of the microbes recovered, Cyanobacteria constituted proportionally a minor component, relative to other dominant phyla like Proteobacteria and Actinobacteria. Linear regression (generalised least-squares) models accounting for spatial autocorrelation showed that historical inundation frequency had no significant effect on the proportional abundance of Cyanobacteria at both wetlands studied. However, inundation frequency had a significant positive effect on the proportional abundance of Proteobacteria and a significant negative effect on the proportional abundance of Actinobacteria. Cyanobacteria seem to occupy a different hydrological niche from Proteobacteria and Actinobacteria in semi-arid floodplain wetlands, suggesting taxon-dependent response of floodplain microbial communities to varying inundation regimes and associated soil conditions in those environments.
dc.language	English
dc.publisher	CSIRO PUBLISHING
dc.relation.ispartof	Marine and Freshwater Research
dc.relation.isbasedon	10.1071/MF18468
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Marine Biology & Hydrobiology
dc.title	Influence of historical inundation frequency on soil microbes (Cyanobacteria, Proteobacteria, Actinobacteria) in semi-arid floodplain wetlands
dc.type	Journal Article
utslib.citation.volume	71
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-12-16T04:45:12Z
pubs.issue	5
pubs.publication-status	Published
pubs.volume	71
utslib.citation.issue	5

Abstract:

© 2020 CSIRO. Cyanobacteria and other microbes are important moderators of biogeochemical processes in semi-arid floodplain wetlands with varying inundation regimes. Inundation is a key environmental driver for floodplain biological communities. Little is known about the effect of historical inundation frequency on the spatial abundance of floodplain-wetland Cyanobacteria and other microbes. In this study, soil samples were collected at two locations with a gradient of low-to-high inundation frequency in the Macquarie Marshes, south-east Australia. We used high-throughput sequencing to estimate the proportional abundance of the soil Cyanobacteria and other dominant microbes, targeting the bacterial 16S rRNA gene. Of the microbes recovered, Cyanobacteria constituted proportionally a minor component, relative to other dominant phyla like Proteobacteria and Actinobacteria. Linear regression (generalised least-squares) models accounting for spatial autocorrelation showed that historical inundation frequency had no significant effect on the proportional abundance of Cyanobacteria at both wetlands studied. However, inundation frequency had a significant positive effect on the proportional abundance of Proteobacteria and a significant negative effect on the proportional abundance of Actinobacteria. Cyanobacteria seem to occupy a different hydrological niche from Proteobacteria and Actinobacteria in semi-arid floodplain wetlands, suggesting taxon-dependent response of floodplain microbial communities to varying inundation regimes and associated soil conditions in those environments.

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http://hdl.handle.net/10453/144766