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Soil bacterial and fungal communities along a soil chronosequence assessed by fatty acid profiling

Welc, Monika; Bünemann, Else K.; Fließbach, Andreas; Frossard, Emmanuel and Jansa, Jan (2012) Soil bacterial and fungal communities along a soil chronosequence assessed by fatty acid profiling. Soil Biology and Biochemistry, 49, pp. 184-192.

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Online at: http://dx.doi.org/10.1016/j.soilbio.2012.01.032

Summary

Microbial communities are important components of terrestrial ecosystems. The importance of their diversity and functions for natural systems is well recognized. However, a better understanding of successional changes of microbial communities over long time scales is still required. In this work, the size and composition of microbial communities in soils of a deglaciation chronosequence at the Damma glacier forefield were studied by fatty acid profiling. Soil fatty acid concentrations clearly increased with soil age. The abundances of arbuscular mycorrhizal fungi (AMF), bacteria and other soil fungi, however, were more affected by abiotic soil parameters like carbon content and pH than by soil age. Analysis of ratios of the different microbial groups (AMF, fungi, bacteria) along the soil chronosequence indicated that: i) the ratios of AMF to bacteria and AMF to fungi decreased with soil age; and ii) the ratio of fungi to bacteria remained unchanged along the soil chronosequence. These two pieces of evidence suggest that the evolution of this ecosystem proceeds at an uneven pace over time and that the role of AMF is less important in older, more organic and acidified soils than in mineral soils. In contrast to other studies, no successional replacement of bacteria with fungi in more acidified and organic soil was observed.


EPrint Type:Journal paper
Keywords:Bodenwissenschaften, Effizienz von Anbausystemen, Mikroorganismengemeinschaften, Humus, soel fertility, Fatty acid methyl esters (FAME), Glacier forefield, Soil chronosequence, Microbial community, Mycorrhizal fungi, Community size, Environmental determinants
Subjects: Soil > Soil quality
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil Sciences
Switzerland > ETHZ - Agrarwissenschaften
Czech Republic
ISSN:0038-0717
DOI:10.1016/j.soilbio.2012.01.032
Related Links:http://www.fibl.org/en/switzerland/research/soil-sciences/soil-sciences.html, http://www.sciencedirect.com/science/article/pii/S0038071712000697
Deposited By: Fliessbach, Dr. Andreas
ID Code:21946
Deposited On:05 Dec 2012 13:57
Last Modified:05 Dec 2012 13:57
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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