Microorganisms as scaffolds of host individuality: an eco-immunity account of the holobiont

Biology and Philosophy 31 (6):819-837 (2016)
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Abstract

There is currently a great debate about whether the holobiont, i.e. a multicellular host and its residential microorganisms, constitutes a biological individual. We propose that resident microorganisms have a general and important role in the individuality of the host organism, not the holobiont. Drawing upon the Equilibrium Model of Immunity, we argue that microorganisms are scaffolds of immune capacities and processes that determine the constituency and persistence of the host organism. A scaffolding perspective accommodates the contingency and heterogeneity of resident microorganisms while accounting for their necessity and unifying contributions to host individuality. In our symbiotic view of life, holobionts may not be organisms or units of selection, but macroorganisms cannot persist nor function as individuals without their scaffolding microorganisms.

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Lynn Chiu
University of Bordeaux/CNRS

References found in this work

Minds: extended or scaffolded?Kim Sterelny - 2010 - Phenomenology and the Cognitive Sciences 9 (4):465-481.
Organisms, Agency, and Evolution.D. M. Walsh - 2015 - Cambridge University Press.
Philosophy of Microbiology.Maureen O'Malley - 2014 - Cambridge University Press.

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