Linking soil bacterial biodiversity and soil carbon stability
Rebecca L. Mau,Cindy M. Liu,Maliha Aziz,Egbert Schwartz,Paul Dijkstra,Jane C. Marks,Lance B. Price,Paul Keim,Bruce A. Hungate +8 more
TLDR
Using dual-stable isotope probing, it is shown that changes in the diversity and composition of two functional bacterial groups occur with this ‘priming’ effect, with consequences for native soil C stability.Abstract:
Native soil carbon (C) can be lost in response to fresh C inputs, a phenomenon observed for decades yet still not understood. Using dual-stable isotope probing, we show that changes in the diversity and composition of two functional bacterial groups occur with this ‘priming’ effect. A single-substrate pulse suppressed native soil C loss and reduced bacterial diversity, whereas repeated substrate pulses stimulated native soil C loss and increased diversity. Increased diversity after repeated C amendments contrasts with resource competition theory, and may be explained by increased predation as evidenced by a decrease in bacterial 16S rRNA gene copies. Our results suggest that biodiversity and composition of the soil microbial community change in concert with its functioning, with consequences for native soil C stability.read more
Citations
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Network analysis reveals functional redundancy and keystone taxa amongst bacterial and fungal communities during organic matter decomposition in an arable soil
Samiran Banerjee,Clive A. Kirkby,Dione Schmutter,Andrew Bissett,John A. Kirkegaard,Alan Richardson +5 more
TL;DR: Overall, it is shown that addition of nutrients reduces diversity but favours the keystone taxa, and thereby increases microbial biomass.
Journal ArticleDOI
Large-scale generation and analysis of filamentous fungal DNA barcodes boosts coverage for kingdom fungi and reveals thresholds for fungal species and higher taxon delimitation.
Duong Vu,Marizeth Groenewald,M. de Vries,Thies Gehrmann,B. Stielow,Ursula Eberhardt,Abdullah M. S. Al-Hatmi,Johannes Z. Groenewald,Gianluigi Cardinali,Jos Houbraken,Teun Boekhout,Teun Boekhout,Pedro W. Crous,Pedro W. Crous,Pedro W. Crous,Vincent Robert,G.J.M. Verkley +16 more
TL;DR: The DNA barcodes used in this study have been deposited to GenBank and will also be publicly available at the Westerdijk Institute's website as reference sequences for fungal identification, marking an unprecedented data release event in global fungal barcoding efforts to date.
Journal ArticleDOI
Direct and indirect effects of climate change on soil microbial and soil microbial‐plant interactions: What lies ahead?
Aimée T. Classen,Aimée T. Classen,Maja K. Sundqvist,Maja K. Sundqvist,Jeremiah A. Henning,Gregory S. Newman,Jessica A. M. Moore,Melissa A. Cregger,Leigh C. Moorhead,Leigh C. Moorhead,Courtney M. Patterson +10 more
TL;DR: How climatic change affects soil microbes and soil microbe-plant interactions directly and indirectly is explored, and what ramifications changes in these interactions may have on the composition and function of ecosystems are discussed.
Journal ArticleDOI
Microplastics from mulching film is a distinct habitat for bacteria in farmland soil
TL;DR: Co-occurrence network analysis revealed that the biotic interactions between microorganisms on microplastics are as complex as those in soil, and Acidobacteria, Chloroflexi, Gemmatimonadetes, and Bacteroids are considered keystone species in bacterial communities.
Journal ArticleDOI
Quantitative Microbial Ecology through Stable Isotope Probing
Bruce A. Hungate,Rebecca L. Mau,Egbert Schwartz,J. Gregory Caporaso,Paul Dijkstra,Natasja van Gestel,Benjamin J. Koch,Cindy M. Liu,Theresa A. McHugh,Jane C. Marks,Ember M. Morrissey,Lance B. Price +11 more
TL;DR: qSIP is demonstrated using soil incubations, in which soil bacteria exhibited strong taxonomic variations in 18O and 13C composition after exposure to [18O]water or [13C]glucose, demonstrating the benefit of a quantitative approach to stable isotope probing.
References
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Review of mechanisms and quantification of priming effects.
TL;DR: In this paper, the authors reveal possible causes and processes leading to priming actions using the references on agricultural ecosystems and model experiments, and summarize in Tables for positive and negative real and apparent priming effects induced after the addition of different organic and mineral substances to the soil.
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