Spatial distribution of bacterial communities and their relationships with the micro-architecture of soil

Naoise Nunan, Kejian Wu, Iain M. Young, John W. Crawford, Karl Ritz

Research output: Contribution to journalArticlepeer-review

283 Scopus citations

Abstract

Biological soil thin-sections and a combination of image analysis and geostatistical tools were used to conduct a detailed investigation into the distribution of bacteria in soil and their relationship with pores. The presence of spatial patterns in the distribution of bacteria was demonstrated at the microscale, with ranges of spatial autocorrelation of 1 mm and below. Bacterial density gradients were found within bacterial patches in topsoil samples and also in one subsoil sample. Bacterial density patches displayed a mosaic of high and low values in the remaining subsoil samples. Anisotropy was detected in the spatial structure of pores, but was not detected in relation to the distribution of bacteria. No marked trend as a function of distance to the nearest pore was observed in bacterial density values in the topsoil, but in the subsoil bacterial density was greatest close to pores and decreased thereafter. Bacterial aggregation was greatest in the cropped topsoil, though no consistent trends were found in the degree of bacterial aggregation as a function of distance to the nearest pore. The implications of the results presented for modelling and predicting bacterial activity in soil are discussed. © 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)203-215
Number of pages13
JournalFEMS Microbiology Ecology
Volume44
Issue number2
DOIs
StatePublished - May 15 2003
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-02-15

ASJC Scopus subject areas

  • Ecology
  • Applied Microbiology and Biotechnology
  • Microbiology

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