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Dryland soil microbial communities display spatial biogeographic patterns associated with soil depth and soil parent material

FEMS Microbiology Ecology

By:
, , ,
DOI: 10.1111/1574-6941.12143

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Abstract

Biological soil crusts (biocrusts) are common to drylands worldwide. We employed replicated, spatially nested sampling and 16S rRNA gene sequencing to describe the soil microbial communities in three soils derived from different parent material (sandstone, shale, and gypsum). For each soil type, two depths (biocrusts, 0–1 cm; below-crust soils, 2–5 cm) and two horizontal spatial scales (15 cm and 5 m) were sampled. In all three soils, Cyanobacteria and Proteobacteria demonstrated significantly higher relative abundance in the biocrusts, while Chloroflexi and Archaea were significantly enriched in the below-crust soils. Biomass and diversity of the communities in biocrusts or below-crust soils did not differ with soil type. However, biocrusts on gypsum soil harbored significantly larger populations of Actinobacteria and Proteobacteria and lower populations of Cyanobacteria. Numerically dominant operational taxonomic units (OTU; 97% sequence identity) in the biocrusts were conserved across the soil types, whereas two dominant OTUs in the below-crust sand and shale soils were not identified in the gypsum soil. The uniformity with which small-scale vertical community differences are maintained across larger horizontal spatial scales and soil types is a feature of dryland ecosystems that should be considered when designing management plans and determining the response of biocrusts to environmental disturbances.

Geospatial Extents

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Dryland soil microbial communities display spatial biogeographic patterns associated with soil depth and soil parent material
Series title:
FEMS Microbiology Ecology
DOI:
10.1111/1574-6941.12143
Volume
86
Issue:
1
Year Published:
2013
Language:
English
Publisher:
Wiley
Contributing office(s):
Southwest Biological Science Center
Description:
13 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
101
Last page:
113
Number of Pages:
13
Country:
United States
State:
Utah
City:
Castle Valley;Moab
Other Geospatial:
Canyonlands National Park