Journal
BIOLOGY & PHILOSOPHY
Volume 32, Issue 3, Pages 443-465Publisher
SPRINGER
DOI: 10.1007/s10539-017-9567-1
Keywords
Cognition; Bacteria; Evolution; Environmental complexity thesis; Sociality
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The paper presents evidence in bacteria for the utility of Godfrey-Smith's environmental complexity thesis (ECT), using certain kinds of signal transduction systems as proxies for cognitive/behavioral complexity. Microbiologists already accept that the number of signal transduction proteins in a bacterial genome indicates the level of ecological complexity to which the organism is subject: the more signalling proteins, the greater the complexity. Sheer numbers are not always a reliable indicator of behavioral complexity, however. The paper proposes a new, ECT-based procedure for identifying, from genomic sequence and signalling repertoire, novel bacterial candidates likely to exhibit behavioral complexity in response to a complex ecological niche.
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