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FEMS Microbiol Ecol. 2016 Jul;92(7). pii: fiw087. doi: 10.1093/femsec/fiw087. Epub 2016 Apr 27.

Natural decay process affects the abundance and community structure of Bacteria and Archaea in Picea abies logs.

Author information

1
University of Helsinki, Department of Food and Environmental Sciences, Division of Microbiology, Viikinkaari 9, 00014 Helsinki, Finland johanna.rinta-kanto@helsinki.fi.
2
University of Helsinki, Department of Food and Environmental Sciences, Division of Microbiology, Viikinkaari 9, 00014 Helsinki, Finland.
3
Natural Resources Institute Finland, Jokiniemenkuja 1, 01370 Vantaa, Finland.
4
Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen Ø, Denmark.
5
Swiss Federal Institute of Technology Zurich, Universitätstrasse 8-22, 8006 Zurich, Switzerland.

Abstract

Prokaryotes colonize decaying wood and contribute to the degradation process, but the dynamics of prokaryotic communities during wood decay is still poorly understood. We studied the abundance and community composition of Bacteria and Archaea inhabiting naturally decaying Picea abies logs and tested the hypothesis that the variations in archaeal and bacterial abundances and community composition are coupled with environmental parameters related to the decay process. The data set comprises >500 logs at different decay stages from five geographical locations in south and central Finland. The results show that Bacteria and Archaea are an integral and dynamic component of decaying wood biota. The abundances of bacterial and archaeal 16S rRNA genes increase as wood decay progresses. Changes in bacterial community composition are clearly linked to the loss of density of wood, while specific fungal-bacterial interactions may also affect the distribution of bacterial taxa in decaying wood. Thaumarchaeota were prominent members of the archaeal populations colonizing decaying wood, providing further evidence of the versatility and cosmopolitan nature of this phylum in the environment. The composition and dynamics of the prokaryotic community suggest that they are an active component of biota that are involved in processing substrates in decaying wood material.

KEYWORDS:

Archaea; Bacteria; Picea abies; abundance; sequencing

PMID:
27127195
DOI:
10.1093/femsec/fiw087
[Indexed for MEDLINE]

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