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Lookup NU author(s): Dr Ben Allen, Dr Rebeca Gonzalez-Cabaleiro, Dr Dana OfiteruORCiD, Professor William Sloan, Donna Swan, Professor Thomas CurtisORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© The Author(s) 2023. Why are some groups of bacteria more diverse than others? We hypothesize that the metabolic energy available to a bacterial functional group (a biogeochemical group or ‘guild’) has a role in such a group’s taxonomic diversity. We tested this hypothesis by looking at the metacommunity diversity of functional groups in multiple biomes. We observed a positive correlation between estimates of a functional group’s diversity and their metabolic energy yield. Moreover, the slope of that relationship was similar in all biomes. These findings could imply the existence of a universal mechanism controlling the diversity of all functional groups in all biomes in the same way. We consider a variety of possible explanations from the classical (environmental variation) to the ‘non-Darwinian’ (a drift barrier effect). Unfortunately, these explanations are not mutually exclusive, and a deeper understanding of the ultimate cause(s) of bacterial diversity will require us to determine if and how the key parameters in population genetics (effective population size, mutation rate, and selective gradients) vary between functional groups and with environmental conditions: this is a difficult task.
Author(s): Allen B, Gonzalez-Cabaleiro R, Ofiteru ID, Ovreas L, Sloan WT, Swan D, Curtis T
Publication type: Article
Publication status: Published
Journal: FEMS Microbiology Letters
Year: 2023
Volume: 370
Online publication date: 16/05/2023
Acceptance date: 15/05/2023
Date deposited: 28/06/2023
ISSN (print): 0378-1097
ISSN (electronic): 1574-6968
Publisher: Oxford University Press
URL: https://doi.org/10.1093/femsle/fnad043
DOI: 10.1093/femsle/fnad043
PubMed id: 37193662
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