Swarthmore College Works Biology Faculty Works Biology 2018 The Holobiont With Its Hologenome Is A Level Of Selection In Evolution Scott F. Gilbert Swarthmore College,
[email protected] E. Rosenberg I. Zilber-Rosenberg Follow this and additional works at: https://works.swarthmore.edu/fac-biology Part of the Biology Commons Let us know how access to these works benefits ouy Recommended Citation Scott F. Gilbert, E. Rosenberg, and I. Zilber-Rosenberg. (2018). "The Holobiont With Its Hologenome Is A Level Of Selection In Evolution". Landscapes Of Collectivity In The Life Sciences. 305-324. https://works.swarthmore.edu/fac-biology/549 This work is brought to you for free by Swarthmore College Libraries' Works. It has been accepted for inclusion in Biology Faculty Works by an authorized administrator of Works. For more information, please contact
[email protected]. The Holobiont with Its Hologenome Is·a Level of Selection in 24 Evolution · Scott F. Gilbert, Eugene Rosenberg, and Ilana Zilber-Rosenberg Symbiosis-once thought to be a peripheral phenomenon-is the hallmark oflife on Earth, from genomes through ecosystems (Gordon 2012). What concerns us here is the level of the organism. Symbiosis is replacing an essentialist conception of "individuality" with a new conception, the holobiont, which is a multilineage biological entity, and, we argue, a major level of natural selection. Zoological organisms have traditionally been defined as individuals on the bases of anatomical, embryological, physiological, immunological, genetic, or evolutionary criteria (Geddes and Mitchell 1911; Clarke 2010; Nyhart and Lidgard 2011; see Gilbert et al. 2012). These conceptions, though, are not wholly inde pendent of one another, and each of these definitions stems from the common tenet of genomic individuality: an individual contains a single genome.