Microbial Ecology

, Volume 59, Issue 3, pp 574–587 | Cite as

Effect of the Earthworms Lumbricus terrestris and Aporrectodea caliginosa on Bacterial Diversity in Soil

  • Taras Y. Nechitaylo
  • Michail M. Yakimov
  • Miguel Godinho
  • Kenneth N. Timmis
  • Elena Belogolova
  • Boris A. Byzov
  • Alexander V. Kurakov
  • David L. Jones
  • Peter N. Golyshin
Soil Microbiology

Abstract

Earthworms ingest large amounts of soil and have the potential to radically alter the biomass, activity, and structure of the soil microbial community. In this study, the diversity of eight bacterial groups from fresh soil, gut, and casts of the earthworms Lumbricus terrestris and Aporrectodea caliginosa were studied by single-strand conformation polymorphism (SSCP) analysis using both newly designed 16S rRNA gene-specific primer sets targeting Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Deltaproteobacteria, Bacteroidetes, Verrucomicrobia, Planctomycetes, and Firmicutes and a conventional universal primer set for SSCP, with RNA and DNA as templates. In parallel, the study of the relative abundance of these taxonomic groups in the same samples was performed using fluorescence in situ hybridization. Bacteroidetes, Alphaproteobacteria, and Betaproteobacteria were predominant in communities from the soil and worm cast samples. Representatives of classes Flavobacteria and Sphingobacteria (Bacteroidetes) and Pseudomonas spp. (low-abundant Gammaproteobacteria) were detected in soil and worm cast samples with conventional and taxon-targeting SSCP and through the sequence analysis of 16S rRNA clone libraries. Physiologically active unclassified Sphingomonadaceae (Alphaproteobacteria) and Alcaligenes spp. (Betaproteobacteria) also maintained their diversities during transit through the earthworm intestine and were found on taxon-targeting SSCP profiles from the soil and worm cast samples. In conclusion, our results suggest that some specific bacterial taxonomic groups maintain their diversity and even increase their relative numbers during transit through the gastrointestinal tract of earthworms.

Supplementary material

248_2009_9604_MOESM1_ESM.pdf (6 kb)
Supplementary Tables(PDF 5 kb)
248_2009_9604_MOESM2_ESM.pdf (44 kb)
Figure S1(PDF 45 kb)
248_2009_9604_MOESM3_ESM.pdf (255 kb)
Supplementary SSCP Analysis(PDF 260 kb)

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Taras Y. Nechitaylo
    • 1
  • Michail M. Yakimov
    • 2
  • Miguel Godinho
    • 1
  • Kenneth N. Timmis
    • 1
    • 4
  • Elena Belogolova
    • 1
  • Boris A. Byzov
    • 3
  • Alexander V. Kurakov
    • 3
  • David L. Jones
    • 5
  • Peter N. Golyshin
    • 1
    • 6
  1. 1.Environmental Microbiology LaboratoryHelmholtz Center for Infection ResearchBraunschweigGermany
  2. 2.Istituto per L’Ambiente Marino CostieroIAMC-CNRMessinaItaly
  3. 3.Department of Soil Biology, Faculty of Soil ScienceMoscow State Lomonosov UniversityMoscowRussia
  4. 4.Institute of Microbiology, BiozentrumTechnical University of BraunschweigBraunschweigGermany
  5. 5.School of the Environment and Natural ResourcesBangor UniversityGwyneddUK
  6. 6.School of Biological SciencesBangor UniversityGwyneddUK

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