PuSH - Publication Server of Helmholtz Zentrum München

Zhang, L. ; Lueders, T.

Micropredator niche differentiation between bulk soil and rhizosphere of an agricultural soil depends on bacterial prey.

FEMS Microbiol. Ecol. 93:fix103 (2017)
Publ. Version/Full Text DOI PMC
Free by publisher
Open Access Green as soon as Postprint is submitted to ZB.
Predation is a fundamental mechanism of all food webs, but its drivers and organismic connectivities, especially at microbial level, are still poorly understood. Specifically, competitive carbon flows in the presence of multiple micropredators, as well as trophic links within and between microbial kingdoms have rarely been resolved. Here, using maize-planted agricultural soil as a model system, we have investigated the predation of amended bacterial prey by both prokaryotic and eukaryotic micropredators. We have queried how soil compartment (rhizosphere vs bulk soil) and nature of prey (Gram-positive vs Gram-negative) influence predation outcomes. We added 13C-labelled biomass of Pseudomonas putida and Arthrobacter globiformis to soil microcosms and found that P. putida was consumed much more rapidly. Bacteria and microeukaryotes specifically responsive to the biomass amendments were identified by RNA-stable isotope probing. Amongst the bacteria, only a few myxobacteria sequestered C from A. globiformis, whereas a considerable diversity of predatory bacteria incorporated C derived from P. putida. Diverse groups of heterotrophic protists, especially amoeba including Glaeseria, Hartmanella and Vahlkampfia spp., were observed to incorporate 13C from both amendments, but with pronounced niche differentiation between rhizosphere and bulk soil. This provides novel insights into niche partitioning between bacterial and eukaryotic micropredators in soil, driven not only by the nature of bacterial prey itself, but also by soil compartments.
Altmetric
Additional Metrics?
[➜Log in]
Edit extra informations Login
Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Intrabacterial Predation ; Myxobacteria ; Protozoa ; Soil Microbial Food Web ; Stable Isotope Probing; Rice Field Soil; In-situ Hybridization; Microbial Food-web; Ribosomal-rna; Community Structure; Carbon Flow; Diversity; Predation; Protists; Tools
ISSN (print) / ISBN 0168-6496
e-ISSN 1574-6941
Journal FEMS Microbiology Ecology
Quellenangaben Volume: 93, Issue: 9, Pages: , Article Number: fix103 Supplement: ,
Publisher Wiley
Publishing Place Oxford
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Groundwater Ecology (IGOE)