Singh, Brajesh K., Tate, Kevin R., Kolipaka, Gokul, Hedley, Carolyn B., Macdonald, Catriona A., Millard, Peter and Murrell, J. C. (J. Colin). (2007) Effect of afforestation and reforestation of pastures on the activity and population dynamics of methanotrophic bacteria. Applied and Environmental Microbiology, Vol.73 (No.16). pp. 5153-5161. ISSN 0099-2240

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Abstract

We investigated the effect of afforestation and reforestation of pastures on methane oxidation and the methanotrophic communities in soils from three different New Zealand sites. Methane oxidation was measured in soils from two pine (Pinus radiata) forests and one shrubland (mainly Kunzea ericoides var. ericoides) and three adjacent permanent pastures. The methane oxidation rate was consistently higher in the pine forest or shrubland soils than in the adjacent pasture soils. A combination of phospholipid fatty acid (PLFA) and stable isotope probing (SIP) analyses of these soils revealed that different methanotrophic communities were active in soils under the different vegetations. The C,, PLFAs (signature of type 11 methanotrophs) predominated under pine and shrublands, and C-16 PLFAs (type I methanotrophs) predominated under pastures. Analysis of the methanotrophs by molecular methods revealed further differences in methanotrophic community structure under the different vegetation types. Cloning and sequencing and terminal -restriction fragment length polymorphism analysis of the particulate methane oxygenase gene (pmoA) from different samples confirmed the PLFA-SIP results that methanotrophic bacteria related to type 11 methanotrophs were dominant in pine forest and shrubland, and type I methanotrophs (related to Methylococcus capsulatus) were dominant in all pasture soils. We report that afforestation and reforestation of pastures caused changes in methane oxidation by altering the community structure of methanotrophic bacteria in these soils.

Item Type:	Journal Article
Subjects:	T Technology > TP Chemical technology Q Science > QR Microbiology
Divisions:	Faculty of Science > Life Sciences (2010- ) > Biological Sciences ( -2010)
Journal or Publication Title:	Applied and Environmental Microbiology
Publisher:	American Society for Microbiology
ISSN:	0099-2240
Date:	August 2007
Volume:	Vol.73
Number:	No.16
Number of Pages:	9
Page Range:	pp. 5153-5161
Identification Number:	10.1128/AEM.00620-07
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/31636

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