Disturbance by soil mixing decreases microbial richness and supports homogenizing community assembly processes.
Nocardioides
community assembly
community coalescence
soil disturbance
soil microbial ecology
Journal
FEMS microbiology ecology
ISSN: 1574-6941
Titre abrégé: FEMS Microbiol Ecol
Pays: England
ID NLM: 8901229
Informations de publication
Date de publication:
23 08 2022
23 08 2022
Historique:
received:
08
03
2022
revised:
14
07
2022
accepted:
20
07
2022
pubmed:
24
7
2022
medline:
26
8
2022
entrez:
23
7
2022
Statut:
ppublish
Résumé
The spatial heterogeneity of soil's microhabitats warrants the study of ecological patterns and community assembly processes in the context of physical disturbance that disrupts the inherent spatial isolation of soil microhabitats and microbial communities. By mixing soil at various frequencies in a 16-week lab incubation, we explored the effects of physical disturbance on soil bacterial richness, community composition, and community assembly processes. We hypothesized that well-mixed soil would harbor a less rich microbial community, with community assembly marked by homogenizing dispersal and homogeneous selection. Using 16S rRNA gene sequencing, we inferred community assembly processes, estimated richness and differential abundance, and calculated compositional dissimilarity. Findings supported our hypotheses, with > 20% decrease in soil bacterial richness in well-mixed soil. Soil mixing caused communities to diverge from unmixed controls (Bray-Curtis dissimilarity; 0.75 vs. 0.25), while reducing within-group heterogeneity. Our results imply that the vast diversity observed in soil may be supported by spatial heterogeneity and isolation of microbial communities, and also provide insight into the effects of physical disturbance and community coalescence events. By isolating and better understanding the effects of spatial heterogeneity and disconnectivity on soil microbial communities, we can better extrapolate how anthropogenic disturbances may affect broad soil functions.
Identifiants
pubmed: 35869965
pii: 6649207
doi: 10.1093/femsec/fiac089
pmc: PMC9397575
pii:
doi:
Substances chimiques
RNA, Ribosomal, 16S
0
Soil
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Commentaires et corrections
Type : ErratumIn
Informations de copyright
© The Author(s) 2022. Published by Oxford University Press on behalf of FEMS.
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