Minor impact of ocean acidification to the composition of the active microbial community in an Arctic sediment

Tait, K; Laverock, B; Shaw, J; Somerfield, PJ; Widdicombe, S

Minor impact of ocean acidification to the composition of the active microbial community in an Arctic sediment

Tait, K Laverock, B

Shaw, J Somerfield, PJ Widdicombe, S

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Publication Type:: Journal Article
Citation:: Environmental Microbiology Reports, 2013, 5 (6), pp. 851 - 860
Issue Date:: 2013-12-01

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Field	Value	Language
dc.contributor.author	Tait, K	en_US
dc.contributor.author	Laverock, B https://orcid.org/0000-0002-9749-0338	en_US
dc.contributor.author	Shaw, J	en_US
dc.contributor.author	Somerfield, PJ	en_US
dc.contributor.author	Widdicombe, S	en_US
dc.date.available	2013-07-10	en_US
dc.date.issued	2013-12-01	en_US
dc.identifier.citation	Environmental Microbiology Reports, 2013, 5 (6), pp. 851 - 860	en_US
dc.identifier.uri	http://hdl.handle.net/10453/37819
dc.description.abstract	Effects of ocean acidification on the composition of the active bacterial and archaeal community within Arctic surface sediment was analysed in detail using 16S rRNA 454 pyrosequencing. Intact sediment cores were collected and exposed to one of five different pCO2 concentrations [380 (present day), 540, 750, 1120 and 3000 μatm] and RNA extracted after a period of 14 days exposure. Measurements of diversity and multivariate similarity indicated very little difference between pCO2 treatments. Only when the highest and lowest pCO2 treatments were compared were significant differences evident, namely increases in the abundance of operational taxonomic units most closely related to the Halobacteria and differences to the presence/absence structure of the Planctomycetes. The relative abundance of members of the classes Planctomycetacia and Nitrospira increased with increasing pCO2 concentration, indicating that these groups may be able to take advantage of changing pH or pCO2 conditions. The modest response of the active microbial communities associated with these sediments may be due to the low and fluctuating pore-water pH already experienced by sediment microbes, a result of the pH buffering capacity of marine sediments, or due to currently unknown factors. Further research is required to fully understand the impact of elevated CO2 on sediment physicochemical parameters, biogeochemistry and microbial community dynamics. © 2013 John Wiley & Sons Ltd and Society for Applied Microbiology.	en_US
dc.relation.ispartof	Environmental Microbiology Reports	en_US
dc.relation.isbasedon	10.1111/1758-2229.12087	en_US
dc.subject.classification	Microbiology	en_US
dc.subject.mesh	Bacteria	en_US
dc.subject.mesh	Archaea	en_US
dc.subject.mesh	Carbon Dioxide	en_US
dc.subject.mesh	RNA, Ribosomal, 16S	en_US
dc.subject.mesh	Sequence Analysis, DNA	en_US
dc.subject.mesh	Water Microbiology	en_US
dc.subject.mesh	Biodiversity	en_US
dc.subject.mesh	Seawater	en_US
dc.subject.mesh	Phylogeny	en_US
dc.subject.mesh	Hydrogen-Ion Concentration	en_US
dc.subject.mesh	Geologic Sediments	en_US
dc.subject.mesh	Arctic Regions	en_US
dc.subject.mesh	Oceans and Seas	en_US
dc.subject.mesh	Microbial Consortia	en_US
dc.title	Minor impact of ocean acidification to the composition of the active microbial community in an Arctic sediment	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	5	en_US
utslib.for	0602 Ecology	en_US
utslib.for	0603 Evolutionary Biology	en_US
utslib.for	0605 Microbiology	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
utslib.copyright.status	closed_access
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	5	en_US

Abstract:

Effects of ocean acidification on the composition of the active bacterial and archaeal community within Arctic surface sediment was analysed in detail using 16S rRNA 454 pyrosequencing. Intact sediment cores were collected and exposed to one of five different pCO2 concentrations [380 (present day), 540, 750, 1120 and 3000 μatm] and RNA extracted after a period of 14 days exposure. Measurements of diversity and multivariate similarity indicated very little difference between pCO2 treatments. Only when the highest and lowest pCO2 treatments were compared were significant differences evident, namely increases in the abundance of operational taxonomic units most closely related to the Halobacteria and differences to the presence/absence structure of the Planctomycetes. The relative abundance of members of the classes Planctomycetacia and Nitrospira increased with increasing pCO2 concentration, indicating that these groups may be able to take advantage of changing pH or pCO2 conditions. The modest response of the active microbial communities associated with these sediments may be due to the low and fluctuating pore-water pH already experienced by sediment microbes, a result of the pH buffering capacity of marine sediments, or due to currently unknown factors. Further research is required to fully understand the impact of elevated CO2 on sediment physicochemical parameters, biogeochemistry and microbial community dynamics. © 2013 John Wiley & Sons Ltd and Society for Applied Microbiology.

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http://hdl.handle.net/10453/37819