Bacterial community structure and function shift across a northern boreal forest fire chronosequence

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Sun , H , Santalahti , M , Pumpanen , J , Köster , K , Berninger , F , Raffaello , T , Asiegbu , F O & Heinonsalo , J 2016 , ' Bacterial community structure and function shift across a northern boreal forest fire chronosequence ' , Scientific Reports , vol. 6 , 32411 . https://doi.org/10.1038/srep32411

Title: Bacterial community structure and function shift across a northern boreal forest fire chronosequence
Author: Sun, Hui; Santalahti, Minna; Pumpanen, Jukka; Köster, Kajar; Berninger, Frank; Raffaello, Tommaso; Asiegbu, Fred O.; Heinonsalo, Jussi
Other contributor: University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Food and Nutrition
University of Helsinki, University of Eastern Finland (UEF)
University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Food and Nutrition









Date: 2016-08-30
Language: eng
Number of pages: 12
Belongs to series: Scientific Reports
ISSN: 2045-2322
DOI: https://doi.org/10.1038/srep32411
URI: http://hdl.handle.net/10138/167380
Abstract: Soil microbial responses to fire are likely to change over the course of forest recovery. Investigations on long-term changes in bacterial dynamics following fire are rare. We characterized the soil bacterial communities across three different times post fire in a 2 to 152-year fire chronosequence by Illumina MiSeq sequencing, coupled with a functional gene array (GeoChip). The results showed that the bacterial diversity did not differ between the recently and older burned areas, suggesting a concomitant recovery in the bacterial diversity after fire. The differences in bacterial communities over time were mainly driven by the rare operational taxonomic units (OTUs <0.1%). Proteobacteria (39%), Acidobacteria (34%) and Actinobacteria (17%) were the most abundant phyla across all sites. Genes involved in C and N cycling pathways were present in all sites showing high redundancy in the gene profiles. However, hierarchical cluster analysis using gene signal intensity revealed that the sites with different fire histories formed separate clusters, suggesting potential differences in maintaining essential biogeochemical soil processes. Soil temperature, pH and water contents were the most important factors in shaping the bacterial community structures and function. This study provides functional insight on the impact of fire disturbance on soil bacterial community.
Subject: SOIL FUNGAL COMMUNITIES
EXTRACELLULAR ENZYME-ACTIVITIES
MICROBIAL COMMUNITY
RAIN-FOREST
WILDFIRE
DIVERSITY
PH
GEOCHIP
LITTER
AVAILABILITY
4112 Forestry
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