Global patterns in the biogeography of bacterial taxa.


Journal Article

Bacteria control major nutrient cycles and directly influence plant, animal and human health. However, we know relatively little about the forces shaping their large-scale ecological ranges. Here, we reveal patterns in the distribution of individual bacterial taxa at multiple levels of phylogenetic resolution within and between Earth's major habitat types. Our analyses suggest that while macro-scale habitats structure bacterial distribution to some degree, abundant bacteria (i.e. detectable using 16S rRNA gene sequencing methods) are confined to single assemblages. Additionally, we show that the most cosmopolitan taxa are also the most abundant in individual assemblages. These results add to the growing body of data that support that the diversity of the overall bacterial metagenome is tremendous. The mechanisms governing microbial distribution remain poorly understood, but our analyses provide a framework with which to test the importance of macro-ecological environmental gradients, relative abundance, neutral processes and the ecological strategies of individual taxa in structuring microbial communities.

Full Text

Cited Authors

  • Nemergut, DR; Costello, EK; Hamady, M; Lozupone, C; Jiang, L; Schmidt, SK; Fierer, N; Townsend, AR; Cleveland, CC; Stanish, L; Knight, R

Published Date

  • January 2011

Published In

Volume / Issue

  • 13 / 1

Start / End Page

  • 135 - 144

PubMed ID

  • 21199253

Pubmed Central ID

  • 21199253

Electronic International Standard Serial Number (EISSN)

  • 1462-2920

International Standard Serial Number (ISSN)

  • 1462-2912

Digital Object Identifier (DOI)

  • 10.1111/j.1462-2920.2010.02315.x


  • eng