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Composition and metabolism of microbial communities in soil pores
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Composition and metabolism of microbial communities in soil pores
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Journal Article
Composition and metabolism of microbial communities in soil pores
2024
Overview
Delineation of microbial habitats within the soil matrix and characterization of their environments and metabolic processes are crucial to understand soil functioning, yet their experimental identification remains persistently limited. We combined single- and triple-energy X-ray computed microtomography with pore specific allocation of
13
C labeled glucose and subsequent stable isotope probing to demonstrate how long-term disparities in vegetation history modify spatial distribution patterns of soil pore and particulate organic matter drivers of microbial habitats, and to probe bacterial communities populating such habitats. Here we show striking differences between large (30-150 µm Ø) and small (4-10 µm Ø) soil pores in (i) microbial diversity, composition, and life-strategies, (ii) responses to added substrate, (iii) metabolic pathways, and (iv) the processing and fate of labile C. We propose a microbial habitat classification concept based on biogeochemical mechanisms and localization of soil processes and also suggests interventions to mitigate the environmental consequences of agricultural management.
The work proposes the concept of distinct micro-habitats within an intact soil matrix and describes composition and metabolic pathways of their bacterial inhabitants, as a first step towards a generalizable C processing-focused classification of soil micro-environmental conditions.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
