Philosophy of Science 74 (1):69-95 (2007)

Authors
Laura Franklin-Hall
New York University
Abstract
Philosophical discussions of species have focused on multicellular, sexual animals and have often neglected to consider unicellular organisms like bacteria. This article begins to fill this gap by considering what species concepts, if any, apply neatly to the bacterial world. First, I argue that the biological species concept cannot be applied to bacteria because of the variable rates of genetic transfer between populations, depending in part on which gene type is prioritized. Second, I present a critique of phylogenetic bacterial species, arguing that phylogenetic bacterial classification requires a questionable metaphysical commitment to the existence of essential genes. I conclude by considering how microbiologists have dealt with these biological complexities by using more pragmatic and not exclusively evolutionary accounts of species. I argue that this pragmatism is not borne of laziness but rather of the substantial conceptual problems in classifying bacteria based on any evolutionary standard.
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DOI 10.1086/519476
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References found in this work BETA

Animal Species and Evolution.Ernst Mayr - 1963 - Belknap of Harvard University Press.
Species.Philip Kitcher - 1984 - Philosophy of Science 51 (2):308-333.
Species.Philip Kitcher - 1984 - Philosophy of Science 51 (2):308-333.

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Citations of this work BETA

Model Organisms Are Not (Theoretical) Models.Arnon Levy & Adrian Currie - 2015 - British Journal for the Philosophy of Science 66 (2):327-348.
Species.Marc Ereshefsky - 2010 - Stanford Encyclopedia of Philosophy.
Microbiology and the Species Problem.Marc Ereshefsky - 2010 - Biology and Philosophy 25 (4):553-568.
What Is a Recipe?Andrea Borghini - 2015 - Journal of Agricultural and Environmental Ethics 28 (4):719-738.

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