Effects of aboveground grazing on coupling among nitrifier activity, abundance and community structure

The influence of switches in grassland management to or from grazing on the dynamics of nitrifier activity, as well as the abundance of ammonia-oxidizing bacteria, AOB and ammonia-oxidizing archeae, AOA, was analyzed for two years after changing management. Additionally community structure of AOB wa...

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Bibliographic Details
Published in:The ISME Journal 2008-02, Vol.2 (2), p.221-232
Main Authors: Le Roux, Xavier, Poly, Franck, Currey, Pauline, Commeaux, Claire, Hai, Brigitte, Nicol, Graeme W, Prosser, James I, Schloter, Michael, Attard, Eléonore, Klumpp, Katja
Format: Article
Language:English
Subjects:
Ammonia
Ammonia - metabolism
Animals
Archaea - classification
Archaea - genetics
Archaea - growth & development
Archaea - metabolism
Bacteria - classification
Bacteria - genetics
Bacteria - growth & development
Bacteria - metabolism
Betaproteobacteria - classification
Betaproteobacteria - genetics
Betaproteobacteria - growth & development
Betaproteobacteria - metabolism
Biodiversity
Biodiversity and Ecology
Biomedical and Life Sciences
Community structure
DNA, Archaeal - analysis
DNA, Bacterial - analysis
Ecology
Ecology, environment
Ecosystem
Environmental conditions
Environmental Sciences
Evolutionary Biology
Grassland management
Grasslands
Grazing
Life Sciences
Microbial Ecology
Microbial Genetics and Genomics
Microbiology
Nitrates - metabolism
Nitrification
original-article
Oxidoreductases - genetics
Phylogeny
Poaceae - chemistry
Poaceae - drug effects
Polymerase Chain Reaction
RNA, Ribosomal, 16S - genetics
Sheep
Soil - analysis
Soil Microbiology
Urine
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Summary:The influence of switches in grassland management to or from grazing on the dynamics of nitrifier activity, as well as the abundance of ammonia-oxidizing bacteria, AOB and ammonia-oxidizing archeae, AOA, was analyzed for two years after changing management. Additionally community structure of AOB was surveyed. Four treatments were compared in mesocosms: grazing on previously grazed grassland (G-G); no grazing on ungrazed grassland (U-U); grazing on ungrazed grassland (U-G) and cessation of grazing on grazed grassland (G-U). Nitrifier activity and abundance were always higher for G-G than U-U treatments and AOB community structure differed between these treatments. AOA abundance was in the same range as AOB abundance and followed the same trend. Grazing led to a change in AOB community structure within
ISSN:1751-7362
1751-7370
DOI:10.1038/ismej.2007.109