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Depth dependence of climatic controls on soil microbial community activity and composition

Journal Article · · ISME Communications

Abstract

Subsoil microbiomes play important roles in soil carbon and nutrient cycling, yet our understanding of the controls on subsoil microbial communities is limited. Here, we investigated the direct (mean annual temperature and precipitation) and indirect (soil chemistry) effects of climate on microbiome composition and extracellular enzyme activity throughout the soil profile across two elevation-bioclimatic gradients in central California, USA. We found that microbiome composition changes and activity decreases with depth. Across these sites, the direct influence of climate on microbiome composition and activity was relatively lower at depth. Furthermore, we found that certain microbial taxa change in relative abundance over large temperature and precipitation gradients only in specific soil horizons, highlighting the depth dependence of the climatic controls on microbiome composition. Our finding that the direct impacts of climate are muted at depth suggests that deep soil microbiomes may lag in their acclimation to new temperatures with a changing climate.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725; AC05-00OR22725
OSTI ID:
1835911
Alternate ID(s):
OSTI ID: 1836446
OSTI ID: 1860247
Journal Information:
ISME Communications, Journal Name: ISME Communications Journal Issue: 1 Vol. 1; ISSN 2730-6151
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

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