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Published online 5 April 2007
Published in Soil Sci Soc Am J 71:730-734 (2007)
DOI: 10.2136/sssaj2006.0301N
© 2007 Soil Science Society of America
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Assessing Soil Microbial Community Composition Across Landscapes: Do Surface Soils Reveal Patterns?

Victoria J. Allisona,b,*, Zhanna Yermakovb, R. Michael Millerb, Julie D. Jastrowb and Roser Matamalab

a Landcare Research Private Bag 92170 Auckland 1142 New Zealand
b Biosciences Division Argonne National Lab. Argonne, IL 60439-4843


Figure 1
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  		Fig. 1. Microbial community composition assessed as relative abundance of signature phospholipid fatty acids in (a) surface soil and (b) an integrated soil column, with each community summarized to a single point by using a principle components analysis (PCA).

 

Figure 2
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  		Fig. 2. Comparison of microbial community composition and biomass in surface soil and an integrated soil column, with microbial community composition assessed as (a) position on principal component analysis (PCA) Axis 1, (b) fungal/bacterial ratio, (c) arbuscular mycorrhizal fungal (AMF)/bacterial ratio, (d) Gram positive/Gram negative ratio, (e) actinomycetal/bacterial ratio, and (f) microbial biomass assessed as total phospholipid fatty acid (PLFA). Each point represents the mean (with standard deviation) of three replicate measures. The dotted line is a 1:1 line: points that fall above the 1:1 line are higher in the integrated than surface soil, while points that fall below the 1:1 line are higher in the surface than integrated soil column.

 




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