Frontiers in Psychology 187 (11) (2020)

Authors
Javier Suárez
Jagiellonian University
Abstract
Contemporary biological research has suggested that some host–microbiome multispecies systems (referred to as “holobionts”) can in certain circumstances evolve as unique biological individual, thus being a unit of selection in evolution. If this is so, then it is arguably the case that some biological adaptations have evolved at the level of the multispecies system, what we call hologenomic adaptations. However, no research has yet been devoted to investigating their nature, or how these adaptations can be distinguished from adaptations at the species-level (genomic adaptations). In this paper, we cover this gap by investigating the nature of hologenomic adaptations. By drawing on the case of the evolution of sanguivory diet in vampire bats, we argue that a trait constitutes a hologenomic adaptation when its evolution can only be explained if the holobiont is considered the biological individual that manifests this adaptation, while the bacterial taxa that bear the trait are only opportunistic beneficiaries of it. We then use the philosophical notions of emergence and inter-identity to explain the nature of this form of individuality and argue why it is special of holobionts. Overall, our paper illustrates how the use of philosophical concepts can illuminate scientific discussions, in the trend of what has recently been called metaphysics of biology.
Keywords Hologenome  Microbiome  Emergence  Adaptation  Identity  Multispecies
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DOI 10.3389/fpsyg.2020.00187
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Philosophy of Biology.Elliott Sober - 1993 - Westview Press.
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In Defense of Proper Functions.Ruth Garrett Millikan - 1989 - Philosophy of Science 56 (June):288-302.

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El holobionte/hologenoma como nivel de seleccion.Javier Suárez - 2021 - Theoria: Revista de Teoría, Historia y Fundamentos de la Ciencia 36 (1):81-112.

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