Journal
ECOLOGY AND EVOLUTION
Volume 11, Issue 9, Pages 3956-3976Publisher
WILEY
DOI: 10.1002/ece3.7290
Keywords
archaea; bacteria; cell diameter; ecological strategies; genome size; maximum growth rate; traits
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Funding
- Macquarie University
- Australian Research Council
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Based on the most extensive data compilation so far, it was found that there is little correlation among maximum relative growth rate, cell diameter, and genome size in bacteria and archaea. These traits should be considered as independent dimensions of ecological variation, as they do not show a consistent relationship with each other. Species identified as oligotrophs or copiotrophs were separated based on maximum growth rate but not on genome size or cell diameter.
Among bacteria and archaea, maximum relative growth rate, cell diameter, and genome size are widely regarded as important influences on ecological strategy. Via the most extensive data compilation so far for these traits across all clades and habitats, we ask whether they are correlated and if so how. Overall, we found little correlation among them, indicating they should be considered as independent dimensions of ecological variation. Nor was correlation evident within particular habitat types. A weak nonlinearity (6% of variance) was found whereby high maximum growth rates (temperature-adjusted) tended to occur in the midrange of cell diameters. Species identified in the literature as oligotrophs or copiotrophs were clearly separated on the dimension of maximum growth rate, but not on the dimensions of genome size or cell diameter.
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